The possibility of synthesizing a new hybrid phosphor CSSC (mixture of 0.5 CaSrSiO₄:Eu²⁺: 0.29 Ca₆Sr₄Si₆O₂₁Cl₂:Eu²⁺: 0.21 Ca₁₀Si₆O₂₁Cl₂:Eu²⁺) using a one-step microwave synthesis method is demonstrated. The concentrations of europium and calcium in the synthesized phosphors were optimized at 1 and 10 mol. %, respectively, to achieve maximum brightness and color rendering index. The optimal conditions for the synthesis of phosphors in a microwave furnace were determined as 750 °C for 10 min. The resulting phosphor exhibited a wide luminescence spectrum that covered the entire visible region, resulting in a high color rendering index and a warm white luminescence when used as a light source. It is shown that the sol–gel method for preparing the charge mixture for the new phosphor allows for a 35% higher luminescence brightness compared to the solid-phase method, due to a more uniform distribution of the activator.

A series of Eu-doped silicate phosphors was prepared in a microwave furnace using different charge mixture preparation methods. Synthesis parameters (time and power) were optimized to increase the yield and brightness of phosphors featuring with a “warm” white luminescence. The charge mixture prepared using sol–gel process provided phosphor with enhanced brightness compared with a solid phase preparation technique supposedly due to more uniform distribution and better introduction of the activator into the phosphor. White LED prototype was fabricated using synthesized phosphor.

A series of Eu-doped silicate phosphors was prepared in a microwave furnace using different charge mixture preparation methods. Synthesis parameters (time and power) were optimized to increase the yield and brightness of phosphors featuring with a "warm" white luminescence. The charge mixture prepared using sol-gel process provided phosphor with enhanced brightness compared with a solid phase preparation technique supposedly due to more uniform distribution and better introduction of the activator into the phosphor. White LED prototype was fabricated using synthesized phosphor.

Specimens composed of Zr_{0.95 – x}Y_0.05O₂:\({\text{Eu}}_{x}^{{3 + }}\) (x = 0.01–0.15) are synthesized in a muffle furnace and activated by thermal treatment in an electromagnetic field of the microwave range. The conditions for the activation and concentration of Eu³⁺ in phosphor are optimized. Microwave heat treatment results in the growth of grains, reduces microstresses, and increases the fluorescent brilliance of the specimens by a factor of 2.4.

A one-stage method for the synthesis of a mixed phosphor Sr₂SiO₄:Eu²⁺, Сa₁₀Si₆O₂₁Cl₂:Eu²⁺, Сa₆Sr₄(Si₂O₇)₃Cl₂:Eu²⁺ is developed in a microwave. The phase composition and spectral-brightness properties of phosphors are studied depending on the synthesis conditions. The optimal conditions for the synthesis of phosphors in a microwave oven are determined: 750°C, 10 min. Phosphor, synthesized under the optimal conditions, has a wide luminescence spectrum covering the entire visible area, which provides a high color rendering index and a warm white glow of the light source based on it.

It is shown that the high-temperature (1100°C) microwave treatment of the ZrO₂–Y₂O₃–Eu₂O₃ luminophores obtained by wet mixing using zirconium oxochloride and yttrium acetate leads to a significant growth in the luminescence brightness that exceeds that of an industrial luminophore based on Y₂O₃ : Eu³⁺ by a factor of 1.75. For a luminophore with the identical composition obtained by the coprecipitation of hydroxides from a solution of the corresponding nitrates, a similar microwave thermal treatment leads to a sharp decrease in the brightness. The observed differences in the characteristics of the synthesized luminophores are compared to the changes in the functional composition of their surface and dispersity as a result of the microwave treatment.