This page has only limited features, please log in for full access.
Evolution of spectroscopic properties of a soda–lime silicate glass with different thermal history and under applied uniaxial stress was investigated using Raman and Brillouin spectroscopies as well as Nd3+ photoluminescence techniques. Samples of soda–lime silicate with a cooling rate from 6 × 10−4 to 650 K/min were prepared either by controlled cooling from the melt using a differential scanning calorimeter or by a conventional annealing procedure. Uniaxial stress effects in a range from 0 to −1.3 GPa were investigated in situ by compression of the glass cylinders. The spectroscopic observations of rearrangements in the network structure were related to the set cooling rates or the applied uniaxial stress to calculate an interrelated set of calibrations. Comparing the results from Raman and Brillouin spectroscopy with Nd3+ photoluminescence analysis, we find a linear dependence that can be used to identify uniaxial stress and cooling rate in any given combination concurrently. The interrelated calibrations and linear dependence models are established and evaluated, and equations relating the change of glass network due to effects of cooling rate or uniaxial stress are given.
Michael Bergler; Kristian Cvecek; Ferdinand Werr; Alexander Veber; Julia Schreiner; Udo Eckstein; Kyle Webber; Michael Schmidt; Dominique de Ligny. Coupling Raman, Brillouin and Nd3+ Photo Luminescence Spectroscopy to Distinguish the Effect of Uniaxial Stress from Cooling Rate on Soda–Lime Silicate Glass. Materials 2021, 14, 3584 .
AMA StyleMichael Bergler, Kristian Cvecek, Ferdinand Werr, Alexander Veber, Julia Schreiner, Udo Eckstein, Kyle Webber, Michael Schmidt, Dominique de Ligny. Coupling Raman, Brillouin and Nd3+ Photo Luminescence Spectroscopy to Distinguish the Effect of Uniaxial Stress from Cooling Rate on Soda–Lime Silicate Glass. Materials. 2021; 14 (13):3584.
Chicago/Turabian StyleMichael Bergler; Kristian Cvecek; Ferdinand Werr; Alexander Veber; Julia Schreiner; Udo Eckstein; Kyle Webber; Michael Schmidt; Dominique de Ligny. 2021. "Coupling Raman, Brillouin and Nd3+ Photo Luminescence Spectroscopy to Distinguish the Effect of Uniaxial Stress from Cooling Rate on Soda–Lime Silicate Glass." Materials 14, no. 13: 3584.
Ascertaining elements oxidation state, coordination, and bonding environment provides an understanding of the parameters controlling the elements structural behavior, and in turn, the possibility of developing novel applications. Cerium doped materials are widely used for technological applications, mainly because of the strong UV absorption and the characteristic short decay time of the intense emission in the UV–Vis ranges. In this study, Ce speciation in different glass systems has been evaluated and related to variations in optical and physical properties, as well as to variations in glass network connectivity. Data obtained from X-ray Absorption Spectroscopy, Raman, and Photoluminescence Spectroscopy are presented. By using a multispectroscopy approach, we determined the Ce3+/Ce4+ redox ratio in silicate glasses/melts and the influence of the two different Ce species on structure and properties. Our study indicates that reduced Ce species are favored with an increase in the degree of melt polymerization but hindered in alkaline-rich bulk chemistries. Consequently, the oxygen ion activity (here represented by the theoretical optical basicity) might be used to estimate the Ce redox ratio's evolution. On the contrary, we show that glass luminescence properties cannot be tailored by merely adjusting the bulk chemistry. Furthermore, we propose an alternative approach for detecting and quantifying the different Ce species in glasses, and we show the occurrence of a non-symmetric Raman vibration at ~880 cm−1, whose intensity is well correlated with the Ce3+/Ce4+ redox ratio. We assign this band to the interaction of the SiO4 tetrahedra with Ce4+-O polyhedral. Thus, cerium preferentially links to the silicate network, and we examined the possibility of using Raman spectroscopy to detect and quantify the different Ce species.
Maria Rita Cicconi; Alexander Veber; Daniel R. Neuville; François Baudelet; Dominique de Ligny. Cerium speciation in silicate glasses: Structure-property relationships. Journal of Non-Crystalline Solids 2021, 563, 120785 .
AMA StyleMaria Rita Cicconi, Alexander Veber, Daniel R. Neuville, François Baudelet, Dominique de Ligny. Cerium speciation in silicate glasses: Structure-property relationships. Journal of Non-Crystalline Solids. 2021; 563 ():120785.
Chicago/Turabian StyleMaria Rita Cicconi; Alexander Veber; Daniel R. Neuville; François Baudelet; Dominique de Ligny. 2021. "Cerium speciation in silicate glasses: Structure-property relationships." Journal of Non-Crystalline Solids 563, no. : 120785.
Nanosized hydrated YbPO4·nH2O powders were prepared by precipitation from aqueous solutions. It is shown that the structure, optical properties, and size of the raw particles can be further tailored by the subsequent calcination. The raw hydrous crystals transform into the anhydrous YbPO4 xenotime form after calcination at temperatures above 800 °C. In comparison with the hydrous form, the latter is characterized by a well-defined defect-free xenotime structure and multiple sharp peaks in the absorption and emission bands due to the splitting of Yb3+2F7/2 and 2F5/2 manifolds into multiple Stark sublevels as well as by a significant increase in the near-infrared photoluminescence intensity. It is demonstrated that the synthesized YbPO4 phosphors can withstand the corrosive behavior of phosphate glass melts; their reaction with silica glass at temperatures up to 2000 °C is negligible, and thus, YbPO4 particles can be used to prepare translucent glass–crystal composites.
Alexander Veber; Turkka Salminen; Anne Matthes; Robert Mueller; Katrin Wondraczek; Laeticia Petit. Synthesis, Characterization, and Optical Properties of Ytterbium(III) Phosphates and Their Incorporation in Different Glass Matrices. The Journal of Physical Chemistry C 2020, 125, 702 -715.
AMA StyleAlexander Veber, Turkka Salminen, Anne Matthes, Robert Mueller, Katrin Wondraczek, Laeticia Petit. Synthesis, Characterization, and Optical Properties of Ytterbium(III) Phosphates and Their Incorporation in Different Glass Matrices. The Journal of Physical Chemistry C. 2020; 125 (1):702-715.
Chicago/Turabian StyleAlexander Veber; Turkka Salminen; Anne Matthes; Robert Mueller; Katrin Wondraczek; Laeticia Petit. 2020. "Synthesis, Characterization, and Optical Properties of Ytterbium(III) Phosphates and Their Incorporation in Different Glass Matrices." The Journal of Physical Chemistry C 125, no. 1: 702-715.
This review focuses on the radiation-induced changes in germanate and tellurite glasses. These glasses have been of great interest due to their remarkable potential for photonics, in terms of extended transmission window in the mid-infrared, ability of rare-earth loading suitable with a laser, and amplification in the near- and mid-infrared or high nonlinear optical properties. Here, we summarize information about possible radiation-induced defects, mechanisms of their formation, and the influence of the glass composition on this process. Special attention is paid to laser-induced structural modification of these glasses, including possible mechanisms of the laser-glass interaction, laser-induced crystallization, and waveguide writing. It is shown that these methods can be used for photostructuring of the glass and have great potential for practical applications.
Mikko Hongisto; Alexander Veber; Yannick Petit; Thierry Cardinal; Sylvain Danto; Veronique Jubera; Laeticia Petit. Radiation-Induced Defects and Effects in Germanate and Tellurite Glasses. Materials 2020, 13, 3846 .
AMA StyleMikko Hongisto, Alexander Veber, Yannick Petit, Thierry Cardinal, Sylvain Danto, Veronique Jubera, Laeticia Petit. Radiation-Induced Defects and Effects in Germanate and Tellurite Glasses. Materials. 2020; 13 (17):3846.
Chicago/Turabian StyleMikko Hongisto; Alexander Veber; Yannick Petit; Thierry Cardinal; Sylvain Danto; Veronique Jubera; Laeticia Petit. 2020. "Radiation-Induced Defects and Effects in Germanate and Tellurite Glasses." Materials 13, no. 17: 3846.
In this work, we study the relaxation behavior of a densified sodium aluminoborate glass by means of coupled Raman spectroscopy, Brillouin spectroscopy, and differential scanning calorimetry analyses. First, we show that the changes in elastic properties upon densification are largely associated with structural modifications in the glass network at short- and medium-range orders. Then, the evolution of the structural and elastic properties of the densified glass has been monitored in situ in the coupled DSC-Brillouin-Raman setup during isothermal annealing at different temperatures below the glass transition temperature. The stretched exponential function is found to well describe the observed relaxation kinetics, however, the stretching factor β varies non-monotonically with temperature. In contrast, the Arrhenius behavior of the characteristic decay times is deduced by lifetime distribution analysis, revealing three different relaxation processes with typical activation energies of 170±25, 200±5, and 280±15 kJ/mol. The relative contributions of these processes to the overall relaxation kinetics are found to vary with the temperature as well as the type of parameter considered (structural, elastic, or thermal), and hence, the relaxation kinetics cannot be properly understood using the stretched exponent function. The possible origins of the different relaxation processes are discussed.
A. Veber; M.M. Smedskjaer; D. de Ligny. Relaxation behavior of densified sodium aluminoborate glass. Acta Materialia 2020, 198, 153 -167.
AMA StyleA. Veber, M.M. Smedskjaer, D. de Ligny. Relaxation behavior of densified sodium aluminoborate glass. Acta Materialia. 2020; 198 ():153-167.
Chicago/Turabian StyleA. Veber; M.M. Smedskjaer; D. de Ligny. 2020. "Relaxation behavior of densified sodium aluminoborate glass." Acta Materialia 198, no. : 153-167.
The impact of the progressive addition of ZnO up to 5 mol% on the thermal, structural, and optical properties of Er3+-doped phosphate glasses within the system NaPO3-NaF-ZnO-Ag2O is discussed. The glass network was found to depolymerize upon the addition of ZnO. This promotes a slight increase in the intensity of the emission at 1.5 µm as well as enhances the silver ions clustering ability under the heat treating. The Ag-nanoparticles formed after moderate heat-treatment can further enhance the emission at 1.5 µm, whereas an excessive amount of the clusters leads to the opposite effect. The addition of ZnO helps to slightly increase the glass ability of the system. The crystallization behavior study revealed that surface crystallization is observed for all the glasses. It is found that even a small ZnO addition changes the crystalline phases formed after devitrification. Moreover, the addition of ZnO decreases the crystallization tendency of the glass.
Luukas Kuusela; Alexander Veber; Nadia G. Boetti; Laeticia Petit. Impact of ZnO Addition on Er3+ Near-Infrared Emission, the Formation of Ag Nanoparticles, and the Crystallization of Sodium Fluorophosphate Glass. Materials 2020, 13, 527 .
AMA StyleLuukas Kuusela, Alexander Veber, Nadia G. Boetti, Laeticia Petit. Impact of ZnO Addition on Er3+ Near-Infrared Emission, the Formation of Ag Nanoparticles, and the Crystallization of Sodium Fluorophosphate Glass. Materials. 2020; 13 (3):527.
Chicago/Turabian StyleLuukas Kuusela; Alexander Veber; Nadia G. Boetti; Laeticia Petit. 2020. "Impact of ZnO Addition on Er3+ Near-Infrared Emission, the Formation of Ag Nanoparticles, and the Crystallization of Sodium Fluorophosphate Glass." Materials 13, no. 3: 527.
Yb3+ doped oxyfluorophosphate glasses with the composition (98.75) [90NaPO3-(10-x) Na2O-xNaF] - 1.25Yb2O3 (in mol%) with x = 0, 2.5, 5, 7.5 and 10 were prepared using a standard melting process. The progressive replacement of Na2O by NaF leads to an increase in the number of Q2 units at the expense of the Q1 units. This increase in the polymerization of the glass network leads to a shift of the optical band gap to lower wavelength, to a slight increase in the intensity of the emission at 1000 nm and more importantly to a change in the glass crystallization process. Indeed, both surface and bulk crystallization were observed in the glass with x = 0 while surface crystallization only occurs when NaF is added in the phosphate network. The heat treatment leads to the precipitation of at least three crystalline phases: as x increases, the NaPO3 phase grows at the expense of Na5P3O10. All glasses precipitate the Yb containing crystal, NaYbP2O7 which leads to an increase in the intensity of the emission at 1000 nm compared to the emission at 975 nm. We show for the first time to the best of our knowledge that transparent Yb3+ doped phosphate glass-ceramics can be obtained within this glass system when free of NaF.
M. Hongisto; Alexander Veber; N.G. Boetti; S. Danto; V. Jubera; L. Petit. Transparent Yb3+ doped phosphate glass-ceramics. Ceramics International 2020, 46, 1 .
AMA StyleM. Hongisto, Alexander Veber, N.G. Boetti, S. Danto, V. Jubera, L. Petit. Transparent Yb3+ doped phosphate glass-ceramics. Ceramics International. 2020; 46 (16):1.
Chicago/Turabian StyleM. Hongisto; Alexander Veber; N.G. Boetti; S. Danto; V. Jubera; L. Petit. 2020. "Transparent Yb3+ doped phosphate glass-ceramics." Ceramics International 46, no. 16: 1.
For years, scientists have been looking for different techniques to make glasses perfect: fully amorphous and ideally homogeneous. Meanwhile, recent advances in the development of particle-containing glasses (PCG), defined in this paper as glass-ceramics, glasses doped with metallic nanoparticles, and phase-separated glasses show that these “imperfect” glasses can result in better optical materials if particles of desired chemistry, size, and shape are present in the glass. It has been shown that PCGs can be used for the fabrication of nanostructured fibers—a novel class of media for fiber optics. These unique optical fibers are able to outperform their traditional glass counterparts in terms of available emission spectral range, quantum efficiency, non-linear properties, fabricated sensors sensitivity, and other parameters. Being rather special, nanostructured fibers require new, unconventional solutions on the materials used, fabrication, and characterization techniques, limiting the use of these novel materials. This work overviews practical aspects and progress in the fabrication and characterization methods of the particle-containing glasses with particular attention to nanostructured fibers made of these materials. A review of the recent achievements shows that current technologies allow producing high-optical quality PCG-fibers of different types, and the unique optical properties of these nanostructured fibers make them prospective for applications in lasers, optical communications, medicine, lighting, and other areas of science and industry.
Alexander Veber; Zhuorui Lu; Manuel Vermillac; Franck Pigeonneau; Wilfried Blanc; Laeticia Petit. Nano-Structured Optical Fibers Made of Glass-Ceramics, and Phase Separated and Metallic Particle-Containing Glasses. Fibers 2019, 7, 105 .
AMA StyleAlexander Veber, Zhuorui Lu, Manuel Vermillac, Franck Pigeonneau, Wilfried Blanc, Laeticia Petit. Nano-Structured Optical Fibers Made of Glass-Ceramics, and Phase Separated and Metallic Particle-Containing Glasses. Fibers. 2019; 7 (12):105.
Chicago/Turabian StyleAlexander Veber; Zhuorui Lu; Manuel Vermillac; Franck Pigeonneau; Wilfried Blanc; Laeticia Petit. 2019. "Nano-Structured Optical Fibers Made of Glass-Ceramics, and Phase Separated and Metallic Particle-Containing Glasses." Fibers 7, no. 12: 105.
The influence of nucleating agents and heat‐treatments on magnesium‐aluminum‐silicate (MAS) glass‐ceramics were studied. MAS precursor glasses were melted in oxidant (air) and reducing atmospheres. Nb2O5, MoO3 and TiO2+ZrO2 were added as nucleating agents at same molar proportion (1.0%). MAS glass‐ceramics nucleated with Nb2O5 are strike face candidates for security windows when relevant outputs are taken into account, such as transparency, crack resistance, hardness and feasibility. Nb2O5‐doped MAS can achieve up to 20% crystalline volume fraction, while keeping the visible transparency close to 70%. Knoop hardness was raised up to 7.4 GPa in comparison to precursor glass (6.2 GPa), considering the indentation size effect. The crack resistance reached 4 N.
Tobias Benitez; Alexander Veber; Kaline Pagnan Furlan; Lara Barros Rebouças; Dominique Ligny; Dachamir Hotza; Antonio Pedro Novaes De Oliveira; Nahum Travitzky. Development of magnesium‐aluminum‐silicate glass‐ceramics nucleated with Nb 2 O 5. International Journal of Applied Glass Science 2019, 11, 155 -169.
AMA StyleTobias Benitez, Alexander Veber, Kaline Pagnan Furlan, Lara Barros Rebouças, Dominique Ligny, Dachamir Hotza, Antonio Pedro Novaes De Oliveira, Nahum Travitzky. Development of magnesium‐aluminum‐silicate glass‐ceramics nucleated with Nb 2 O 5. International Journal of Applied Glass Science. 2019; 11 (1):155-169.
Chicago/Turabian StyleTobias Benitez; Alexander Veber; Kaline Pagnan Furlan; Lara Barros Rebouças; Dominique Ligny; Dachamir Hotza; Antonio Pedro Novaes De Oliveira; Nahum Travitzky. 2019. "Development of magnesium‐aluminum‐silicate glass‐ceramics nucleated with Nb 2 O 5." International Journal of Applied Glass Science 11, no. 1: 155-169.
We review our work on the development of persistent luminescent (PeL) glasses with different compositions. The direct doping method used for preparation of such glasses is explained. Special attention is paid to the stability of the PeL microparticles (MPs) in the glasses during the glass preparation. We demonstrate that the MPs stability is not only sensitive to the melting conditions but also to the glass composition.
U. Aryal; Nirajan Ojha; T. Trautvetter; Mika Lastusaari; Jumpei Ueda; R. Mueller; Alexander Veber; L. Petit. Persistent Luminescent Glasses Prepared Using the Direct Doping Method. 2019 21st International Conference on Transparent Optical Networks (ICTON) 2019, 1 -6.
AMA StyleU. Aryal, Nirajan Ojha, T. Trautvetter, Mika Lastusaari, Jumpei Ueda, R. Mueller, Alexander Veber, L. Petit. Persistent Luminescent Glasses Prepared Using the Direct Doping Method. 2019 21st International Conference on Transparent Optical Networks (ICTON). 2019; ():1-6.
Chicago/Turabian StyleU. Aryal; Nirajan Ojha; T. Trautvetter; Mika Lastusaari; Jumpei Ueda; R. Mueller; Alexander Veber; L. Petit. 2019. "Persistent Luminescent Glasses Prepared Using the Direct Doping Method." 2019 21st International Conference on Transparent Optical Networks (ICTON) , no. : 1-6.
Optical and structural properties of glasses and glass-ceramics (GC) obtained by different heat-treatment of Tb and Tb-Yb doped sol-gel derived 30ZrO2-70SiO2 materials were investigated. A glass was formed after treatment at 700 °C whereas devitrification of the media after the treatment at 1000 and 1100 °C, led to the formation of GC containing up to three different crystalline phases, namely, tetragonal ZrO2, Yb-disilicate and cristobalite. The modification of the optical properties through the heat treatment was caused by redistribution of the rare earth elements (REE) among the different phases: both Tb and Yb entered the t-ZrO2 lattice, Yb can also be present in the form of a Yb2Si2O7 crystal. Devitrification led to an increase in Tb→Yb energy transfer efficiency as compared to the glass, though it was higher in the samples heat-treated at 1000 °C than in those treated at 1100 °C. The most intensive Yb3+ luminescence, induced by the energy transfer from the Tb3+ ion, was observed at the interface between t-ZrO2 and the glassy phases, due to the high concentration of REE in this area caused by the inability of ZrO2 to accept larger amounts of the REE. The mechanisms of the Tb→Yb energy transfer vary between different phases of the GC. The results obtained in this study are important for the development of spectral down-converters for potential solar energy applications based on Tb-Yb co-doped glass-ceramics.
Masato Isogai; Alexander Veber; Maria Rita Cicconi; Tomokatsu Hayakawa; Dominique De Ligny. Devitrification Behavior of Sol-Gel Derived ZrO2-SiO2 Rare-Earth Doped Glasses: Correlation between Structural and Optical Properties. Ceramics 2018, 1, 274 -286.
AMA StyleMasato Isogai, Alexander Veber, Maria Rita Cicconi, Tomokatsu Hayakawa, Dominique De Ligny. Devitrification Behavior of Sol-Gel Derived ZrO2-SiO2 Rare-Earth Doped Glasses: Correlation between Structural and Optical Properties. Ceramics. 2018; 1 (2):274-286.
Chicago/Turabian StyleMasato Isogai; Alexander Veber; Maria Rita Cicconi; Tomokatsu Hayakawa; Dominique De Ligny. 2018. "Devitrification Behavior of Sol-Gel Derived ZrO2-SiO2 Rare-Earth Doped Glasses: Correlation between Structural and Optical Properties." Ceramics 1, no. 2: 274-286.
While the influence of silicate oxide glass composition on its chemical durability is increasingly known, the contribution of structure only is less well understood, yet is crucial for an accurate description of aqueous alteration mechanisms. The effect of structural disorder can be investigated by varying the thermal history of the glass. Furthermore, the structural changes generated by self-irradiation in nuclear glasses can be compared with those induced by fast quenching. In the context of deep geological disposal of vitreous matrices, it is then challenging to address the structural impact on glass durability. Here, a borosilicate glass, the International Simple Glass, was fiberized to obtain a rapidly quenched sample. The quenching rate and fictive temperature were evaluated from in situ Raman and Brillouin spectroscopies. Multinuclear nuclear magnetic resonance was used to obtain insight into the effect of quenching on the pristine and altered glass structure. Higher bond angle distribution and lower mixing of alkalis were observed in the fast quenched glass. Some of AlO4 groups are then Ca-compensated, while a part of BO4 is transformed into BO3 units. The structural modifications increase the hydrolysis of the silicate network occurring in the forward rate regime at 90 °C by a factor of 1.4–1.8 depending on the pH value. Residual rate regime is similarly affected, more significantly at the beginning of the experiments conducted in silica saturated solutions. These findings prove that the reactivity of glass remains controlled by its structure under the various alteration regimes.
Frederic Angeli; Thibault Charpentier; Patrick Jollivet; Dominique De Ligny; Michael Bergler; Alexander Veber; Stéphane Gin; Hong Li. Effect of thermally induced structural disorder on the chemical durability of International Simple Glass. npj Materials Degradation 2018, 2, 31 .
AMA StyleFrederic Angeli, Thibault Charpentier, Patrick Jollivet, Dominique De Ligny, Michael Bergler, Alexander Veber, Stéphane Gin, Hong Li. Effect of thermally induced structural disorder on the chemical durability of International Simple Glass. npj Materials Degradation. 2018; 2 (1):31.
Chicago/Turabian StyleFrederic Angeli; Thibault Charpentier; Patrick Jollivet; Dominique De Ligny; Michael Bergler; Alexander Veber; Stéphane Gin; Hong Li. 2018. "Effect of thermally induced structural disorder on the chemical durability of International Simple Glass." npj Materials Degradation 2, no. 1: 31.
Due to their unique optical properties, Bi-doped materials have a great potential for the development of new tunable laser sources. Particular attention is given to high-silicate Bi-doped glasses as active media for fiber lasers and optical amplifiers, capable to operate at the second and the third near-infrared (NIR) transparency windows. Although significant practical advances have been achieved in this area, the origin of the NIR luminescence remains unclear. In present paper, a set of glasses 95.5SiO2 - 4.5Al2O3 - xBi2O3 (x= 0; 0.005; 0.01; 0.05; 0.1; 0.2) was synthesized using conventional melt-quenching technique and investigated using a multiscale approach. Variation of the NIR emission was correlated with the change of other optical properties, structure and bismuth redox, supported by Fluorescence/Absorption, Raman and XANES experimental studies respectively. It was found that redox of bismuth shifted towards the formation of more reduced Bi-species with the decrease of the dopant level. Based on the complementary experimental results two NIR optical centers observed were attributed to the presence of Bi+ ion, which dominates at the lowest dopant level, and, presumably Bi+-Bi+ dimer, forming at higher Bi-concentrations. The dimer center found to participate in a Förster-type energy transfer, interpreted as energy migration. This knowledge complements previous findings and will help in rational engineering of Bi-doped optical materials.
Alexander Veber; Maria Rita Cicconi; Alessandro Puri; Dominique De Ligny. Optical Properties and Bismuth Redox in Bi-Doped High-Silica Al–Si Glasses. The Journal of Physical Chemistry C 2018, 122, 19777 -19792.
AMA StyleAlexander Veber, Maria Rita Cicconi, Alessandro Puri, Dominique De Ligny. Optical Properties and Bismuth Redox in Bi-Doped High-Silica Al–Si Glasses. The Journal of Physical Chemistry C. 2018; 122 (34):19777-19792.
Chicago/Turabian StyleAlexander Veber; Maria Rita Cicconi; Alessandro Puri; Dominique De Ligny. 2018. "Optical Properties and Bismuth Redox in Bi-Doped High-Silica Al–Si Glasses." The Journal of Physical Chemistry C 122, no. 34: 19777-19792.
A new experimental setup combining DSC, Raman and Brillouin spectroscopies was developed. In order to estimate its accuracy and stability a study of silicon and the alpha-beta quartz phase transition were performed. The data obtained demonstrated good agreement with previous studies using these three different techniques. For quartz, the temperature behavior of its 147 cm(-1) Raman mode was studied in detail. Using a two-phonon coupling treatment of the Raman band, we show for the first time that its behavior can be well described by Landau theory of first-order phase transitions. The combined DSC-Raman-Brillouin technique is a powerful tool for material science capable of studying thermal, structural and elastic properties simultaneously.
A. Veber; M.R. Cicconi; H. Reinfelder; D. de Ligny. Combined Differential scanning calorimetry, Raman and Brillouin spectroscopies: A multiscale approach for materials investigation. Analytica Chimica Acta 2018, 998, 37 -44.
AMA StyleA. Veber, M.R. Cicconi, H. Reinfelder, D. de Ligny. Combined Differential scanning calorimetry, Raman and Brillouin spectroscopies: A multiscale approach for materials investigation. Analytica Chimica Acta. 2018; 998 ():37-44.
Chicago/Turabian StyleA. Veber; M.R. Cicconi; H. Reinfelder; D. de Ligny. 2018. "Combined Differential scanning calorimetry, Raman and Brillouin spectroscopies: A multiscale approach for materials investigation." Analytica Chimica Acta 998, no. : 37-44.
Summary form only given. Broadband long-lived near-infrared (NIR) luminescence of Bi-doped glasses was discovered in the beginning of XXI century [1]. Working range of the Bi-doped fiber lasers and amplifiers currently covers NIR spectral region from 1140-1775 nm with efficiency up to 60% [2]. Despite the practical results the nature of the observed NIR luminescence is still under debates. After thorough research on the Bi-doped aluminosilicate glasses, <;Bi-O> distances obtained by EXAFS [3] lead the authors to conclude that Bi5+ is responsible for the observed luminescence. Today it is quite accepted, that reducing synthesis conditions are necessary to create Bi-optical centers emitting in NIR [4].
Alexander Veber; Maria Rita Cicconi; Dominique De Ligny. Bismuth optical properties and redox in aluminosilicate glasses. 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) 2017, 1 -1.
AMA StyleAlexander Veber, Maria Rita Cicconi, Dominique De Ligny. Bismuth optical properties and redox in aluminosilicate glasses. 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). 2017; ():1-1.
Chicago/Turabian StyleAlexander Veber; Maria Rita Cicconi; Dominique De Ligny. 2017. "Bismuth optical properties and redox in aluminosilicate glasses." 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) , no. : 1-1.
In this study the correlation between bulk chemistry and optical properties for a set of Eu-bearing phosphate glasses, containing different alkali elements, synthetized in air and under NH3 flux, was investigated. The chemistry of the glass strongly influences several properties and the effects of bulk chemistry and synthesis conditions on glass structure and on thermal and optical properties are discussed. In alkali-phosphate glasses studied by absorption and photoluminescence spectroscopy we verified that Eu2+ emission band shifts toward higher wavelengths by substituting the alkali cation (Na
Maria Rita Cicconi; Alexander Veber; Dominique de Ligny; Jean Rocherullé; Ronan Lebullenger; Franck Tessier. Chemical tunability of europium emission in phosphate glasses. Journal of Luminescence 2017, 183, 53 -61.
AMA StyleMaria Rita Cicconi, Alexander Veber, Dominique de Ligny, Jean Rocherullé, Ronan Lebullenger, Franck Tessier. Chemical tunability of europium emission in phosphate glasses. Journal of Luminescence. 2017; 183 ():53-61.
Chicago/Turabian StyleMaria Rita Cicconi; Alexander Veber; Dominique de Ligny; Jean Rocherullé; Ronan Lebullenger; Franck Tessier. 2017. "Chemical tunability of europium emission in phosphate glasses." Journal of Luminescence 183, no. : 53-61.
D. N. Vtyurina; Alexey Romanov; Alexander Veber; Z. T. Fattakhova; A. A. Antonov; V. B. Tsvetkov; V. N. Korchak. The spectral properties and the NIR photoluminescence of univalent bismuth Bi+ in RbAlCl4, CsAlCl4, RbMgCl3, CsMgCl3, KCdCl3 and RbCdCl3 crystal phases. Russian Journal of Physical Chemistry B 2016, 10, 388 -393.
AMA StyleD. N. Vtyurina, Alexey Romanov, Alexander Veber, Z. T. Fattakhova, A. A. Antonov, V. B. Tsvetkov, V. N. Korchak. The spectral properties and the NIR photoluminescence of univalent bismuth Bi+ in RbAlCl4, CsAlCl4, RbMgCl3, CsMgCl3, KCdCl3 and RbCdCl3 crystal phases. Russian Journal of Physical Chemistry B. 2016; 10 (3):388-393.
Chicago/Turabian StyleD. N. Vtyurina; Alexey Romanov; Alexander Veber; Z. T. Fattakhova; A. A. Antonov; V. B. Tsvetkov; V. N. Korchak. 2016. "The spectral properties and the NIR photoluminescence of univalent bismuth Bi+ in RbAlCl4, CsAlCl4, RbMgCl3, CsMgCl3, KCdCl3 and RbCdCl3 crystal phases." Russian Journal of Physical Chemistry B 10, no. 3: 388-393.
Alexey N. Romanov; Alexander A. Veber; Daria N. Vtyurina; Mikhail S. Kouznetsov; Ksenia S. Zaramenskikh; Igor S. Lisitsky; Zukhra T. Fattakhova; Elena V. Haula; Pavel A. Loiko; Konstantin V. Yumashev; Vladimir N. Korchak. NIR photoluminescence of bismuth-doped CsCdBr3 – The first ternary bromide phase with a univalent bismuth impurity center. Journal of Luminescence 2015, 167, 371 -375.
AMA StyleAlexey N. Romanov, Alexander A. Veber, Daria N. Vtyurina, Mikhail S. Kouznetsov, Ksenia S. Zaramenskikh, Igor S. Lisitsky, Zukhra T. Fattakhova, Elena V. Haula, Pavel A. Loiko, Konstantin V. Yumashev, Vladimir N. Korchak. NIR photoluminescence of bismuth-doped CsCdBr3 – The first ternary bromide phase with a univalent bismuth impurity center. Journal of Luminescence. 2015; 167 ():371-375.
Chicago/Turabian StyleAlexey N. Romanov; Alexander A. Veber; Daria N. Vtyurina; Mikhail S. Kouznetsov; Ksenia S. Zaramenskikh; Igor S. Lisitsky; Zukhra T. Fattakhova; Elena V. Haula; Pavel A. Loiko; Konstantin V. Yumashev; Vladimir N. Korchak. 2015. "NIR photoluminescence of bismuth-doped CsCdBr3 – The first ternary bromide phase with a univalent bismuth impurity center." Journal of Luminescence 167, no. : 371-375.
The bismuth doped aluminosilicate phases leucite (KAlSi2O6), gallium leucite (KGaSi2O6) and pollucite (CsAlSi2O6) display broadband NIR photoluminescence.
A. N. Romanov; A. A. Veber; D. N. Vtyurina; Z. T. Fattakhova; E. V. Haula; D. P. Shashkin; V. B. Sulimov; V. B. Tsvetkov; V. N. Korchak. Near infrared photoluminescence of the univalent bismuth impurity center in leucite and pollucite crystal hosts. Journal of Materials Chemistry C 2015, 3, 3592 -3598.
AMA StyleA. N. Romanov, A. A. Veber, D. N. Vtyurina, Z. T. Fattakhova, E. V. Haula, D. P. Shashkin, V. B. Sulimov, V. B. Tsvetkov, V. N. Korchak. Near infrared photoluminescence of the univalent bismuth impurity center in leucite and pollucite crystal hosts. Journal of Materials Chemistry C. 2015; 3 (15):3592-3598.
Chicago/Turabian StyleA. N. Romanov; A. A. Veber; D. N. Vtyurina; Z. T. Fattakhova; E. V. Haula; D. P. Shashkin; V. B. Sulimov; V. B. Tsvetkov; V. N. Korchak. 2015. "Near infrared photoluminescence of the univalent bismuth impurity center in leucite and pollucite crystal hosts." Journal of Materials Chemistry C 3, no. 15: 3592-3598.
A setup is developed for measuring optical characteristics of opaque and translucent solids in the temperature range of 25 to 1600°C and spectral range of 0.65 to 10.6 µm. Procedures of calibration experiments and measurements of spectral and integral emissivity are described. These procedures allow spectral and integral emissivity and spectral and integral reflectances of various materials, including translucent ones, to be measured accurate to about 10% in the spectral range of 0.65 to 10,6 µm and temperature range of 25 to 1600°C. Optical characteristics of materials are measured at the atmospheric pressure in the normal oxygen atmosphere or in the atmosphere with reduced oxygen content (inert gas or carbon dioxide blowing on the frontal surface of the samples). The accuracy of the thus obtained data on temperature and spectrum dependences of optical characteristics of materials allow measurements to be performed for developing various structures capable of operating at high temperatures.
V. B. Tsvetkov; V. F. Seregin; A. A. Veber; Yu. N. Pyrkov; S. Ya. Rusanov. Method for measuring optical characteristics of opaque and translucent solids at temperatures to 1600°C. Physics of Wave Phenomena 2014, 22, 255 -261.
AMA StyleV. B. Tsvetkov, V. F. Seregin, A. A. Veber, Yu. N. Pyrkov, S. Ya. Rusanov. Method for measuring optical characteristics of opaque and translucent solids at temperatures to 1600°C. Physics of Wave Phenomena. 2014; 22 (4):255-261.
Chicago/Turabian StyleV. B. Tsvetkov; V. F. Seregin; A. A. Veber; Yu. N. Pyrkov; S. Ya. Rusanov. 2014. "Method for measuring optical characteristics of opaque and translucent solids at temperatures to 1600°C." Physics of Wave Phenomena 22, no. 4: 255-261.