荧光粉
材料科学
制作
陶瓷
复合数
激光器
光电子学
陶瓷复合材料
复合材料
光学
医学
替代医学
物理
病理
作者
H. W. Zhao,Jian Xu,Jinsheng Li,Shimeng Liu,Zhongcheng Mu,Jiang Zhi,Xinrong Chen,Xudong Sun
标识
DOI:10.1016/j.jeurceramsoc.2023.08.045
摘要
The application of high-power laser-driven lighting is limited by the insufficient heat dissipation of phosphor converters and the poor color quality of white light. In this study, the Al2O3(Gd,Ce)3(Al,Ga)5O12 (Al2O3GAGG:Ce) composite ceramics were designed to improve thermal performance of phosphors, while maintaining excellent color rendering under high-power laser excitation. Dense composite ceramics were fabricated by pre-sintering at 1600 °C in air followed by HIP at 1700 °C through the investigation of the phase evolution and sintering process. The emission spectrum of GAGG:Ce shows a red shift of 31 nm and a high full width at half maximum (FWHM) of 128 nm. Meanwhile, the thermal conductivity was increased to 13.2 W·m−1K−1 by addition of Al2O3, which is 72% higher than that of single-phase GAGG:Ce ceramic. Therefore, warm white light with high color rendering index (CRI) of 71.4 and low correlated color temperature (CCT) of 4352 K was attained under excitation of high-power LDs.
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