The paper studies efficient Al₂O₃–Ce:YAG and Al₂O₃–Ce:(Y,Gd)AG composite ceramic phosphors produced by reactive vacuum sintering. As one of the possible routes for microstructure optimization, effect of isothermal holding time was considered. The correlation between microstructural parameters (the ratio of average grain size of the matrix and thermally stable phase, residual porosity, grain and pore size distributions) and photoluminescent properties of sintered composite ceramics after combining them with a blue light-emitting diode was identified. The differences in thermal quenching behavior between Ce-doped and Ce,Gd-codoped systems were also discussed. The highest luminous efficiency of almost 151 lm/W (4526 K) and 133 lm/W (3808 K) was obtained for Al₂O₃–Ce:YAG, Al₂O₃–Ce:(Y,Gd)AG phosphors with garnet/alumina size ratio of 2.1 and 1.6, residual porosity of P = 0.0065 and 0.0047 vol%, respectively.

本文研究了有效的Al ₂ O ₃ -Ce：YAG和Al ₂ O ₃-Ce：通过反应真空烧结生产的（Y，Gd）AG复合陶瓷荧光粉。作为微结构优化的可能途径之一，考虑了恒温时间的影响。确定了烧结复合陶瓷与蓝色发光​​二极管结合后的微观结构参数（基体平均晶粒尺寸与热稳定相的比值，残余孔隙率，晶粒和孔径分布之比）与光致发光性能之间的相关性。还讨论了Ce掺杂和Ce，Gd掺杂体系之间的热猝灭行为差异。Al ₂ O ₃ –Ce：YAG，Al ₂ O ₃的最高发光效率接近151 lm / W（4526 K）和133 lm / W（3808 K）–Ce：（Y，Gd）AG荧光粉，石榴石/氧化铝的尺寸比为2.1和1.6，残留孔隙率分别为P  = 0.0065和0.0047 vol％。