Cihangir Duran

Prof. Dr. Cihangir Duran


Research Focus & Metrics

Academic Career Length

30Years (1997-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 April 2004 in Critical Reviews in Solid State and Materials Sciences
Verified
Journal Article
Closed access
GMG. L. Messing
G. L. Messing
STSusan Trolier-McKinstry
Susan Trolier-McKinstry
Edward SabolskyEdward Sabolsky
Edward Sabolsky
CDCihangir Duran
Cihangir Duran
SKS. Kwon
S. Kwon
KOK. S. Oh
K. S. Oh
Crystallographic texturing of polycrystalline ferroelectric ceramics offers a means of achieving significant enhancements in the piezoelectric response. Templated grain growth (TGG) enables the fabrication of textured ceramics with single crystal-like properties, as well as single crystals. In TGG, nucleation and growth of the desired crystal on aligned single crystal template particles results in an increased fraction of oriented material with heating. To facilitate alignment during forming, template particles must be anisometric in shape. To serve as the preferred sites for epitaxy and subsequent oriented growth of the matrix, the template particles need to be single crystal and chemically stable up to the growth temperature. Besides templating the growth process, the template particles may also serve as seed sites for phase formation of a reactive matrix. This process, referred to as Reactive TGG (RTGG), has been used to obtain highly oriented Pb(Mg1/3Nb2/3)O3-PbTiO3, Sr0.53Ba0.47Nb2O6, and (Na1/2Bi1/2)TiO3-BaTiO3. Highly oriented Bi4Ti3O12, Sr2Nb2O7, CaBi4Ti4O15, Pb(Mg1/3Nb2/3)O3-PbTiO3, Sr0.53Ba0.47Nb2O6 and (Na1/2Bi1/2)TiO3-BaTiO3 ceramics have been produced by TGG. The resulting ceramics show texture levels up to 90%, and significant enhancements in the piezoelectric properties relative to randomly oriented ceramics with comparable densities. For example, piezoelectric coefficients of textured piezoelectrics are from 2 to 3 times higher than polycrystalline ceramics and as high as 90% of the single crystal values. In textured PMN-PT, a low field (< 5 kV/cm) piezoelectric coefficient (d 33) of ∼1600 pC/N was obtained with > 0.3% strain (at 50 kV/cm). The high field dielectric and electromechanical properties of textured perovskites are more hysteretic than those of single crystals, probably as a result of clamping by the residual template particles, residual random grains, the presence of non-ferroelectric second phases, and a wide orientation distribution. Lateral clamping of one grain by another may also be an important factor in fiber-textured samples. Means to further improve the quality of texture and thus properties of textured piezoelectric ceramics by TGG are presented.

1 September 2000 in Journal of the American Ceramic Society
Verified
Journal Article
Closed access
PDF file
CDCihangir Duran
Cihangir Duran
STSusan Trolier-McKinstry
Susan Trolier-McKinstry
GMGary L. Messing
Gary L. Messing

1 July 2008 in Journal of Photochemistry and Photobiology A: Chemistry
Verified
Journal Article
Closed access
EYE. Yassıtepe
E. Yassıtepe
HYH Cengiz Yatmaz
H Cengiz Yatmaz
CÖC. Öztürk
C. Öztürk
KÖK. Öztürk
K. Öztürk
CDCihangir Duran
Cihangir Duran

14 January 2011 in Journal of Materials Research
Verified
Journal Article
Closed access
PDF file
SLSoonil Lee
Soonil Lee
SDSinan Dursun
Sinan Dursun
CDCihangir Duran
Cihangir Duran
CRClive Randall
Clive Randall


1 September 2002 in Journal of Materials Research
Verified
Journal Article
Closed access
PDF file
CDCihangir Duran
Cihangir Duran
STSusan Trolier-McKinstry
Susan Trolier-McKinstry
GMGary L. Messing
Gary L. Messing