Abstract Solid-state laser lighting (SSL) fabricated by integrating laser diode with phosphor is a new development to achieve high luminance. Because of the high temperature caused by the laser, the phosphor-conversion apparatus is demanded to possess excellent thermal properties. In this paper, we utilized spark plasma sintering (SPS) to prepare the Al2O3-YAG:Ce phosphor ceramics with outstanding performances. Due to the high thermal conductivity and high transmittance, a high saturation input power (32 W/mm2) can be achieved for the sample with the lowest porosity. The correlated color temperature (CCT) and color rendering index (CRI) of composite ceramics with the lowest porosity are stable as the input power increases from 0.7 W/mm2 to 30.8 W/mm2. Nevertheless, the sample with the highest porosity shows the highest luminescence efficiency (305 lm/W) and luminous emittances (1796 lm/mm2), which can be ascribed to the scattering of the pore.

中文翻译：

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孔隙率对 Al2O3-YAG:Ce 荧光粉陶瓷的影响：激光驱动照明中的微观结构、发光效率和发光稳定性

摘要 激光二极管与荧光粉集成的固态激光照明（SSL）是实现高亮度的新进展。由于激光引起的高温，要求磷光体转换装置具有优良的热性能。在本文中，我们利用放电等离子烧结 (SPS) 制备了性能优异的 Al2O3-YAG:Ce 荧光粉陶瓷。由于具有高导热性和高透射率，孔隙率最低的样品可以获得高饱和输入功率 (32 W/mm2)。随着输入功率从 0.7 W/mm2 增加到 30.8 W/mm2，孔隙率最低的复合陶瓷的相关色温 (CCT) 和显色指数 (CRI) 是稳定的。尽管如此，