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Cold Sintering of Highly Transparent Calcium Fluoride Nanoceramic as a Universal Platform for High-Power Lighting
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-04-26 , DOI: 10.1002/adfm.202302088 Jie Gao 1 , Zhiguo Xia 2 , Qi Ding 1 , Yongping Liu 1 , Peng Yan 1 , Yunfeng Hu 1 , Lianjun Wang 1 , Wei Luo 1 , Yuchi Fan 1 , Wan Jiang 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-04-26 , DOI: 10.1002/adfm.202302088 Jie Gao 1 , Zhiguo Xia 2 , Qi Ding 1 , Yongping Liu 1 , Peng Yan 1 , Yunfeng Hu 1 , Lianjun Wang 1 , Wei Luo 1 , Yuchi Fan 1 , Wan Jiang 1
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A thermally robust all-inorganic color converter is imperative to high-power light-emitting diode (LED) lighting. However, it remains challenging to find a universal inorganic matrix for encapsulating multicolor phosphors due to the hurdle of achieving a highly transparent medium at a moderate temperature. Here, the densification of calcium fluoride (CaF2) nanoceramic with visible transmittance up to 75% at merely 350 °C, benefiting from an acid-mediated cold sintering process of oxygen-segregated CaF2 nanoparticles is reported. Using the optically isotropic CaF2 as a transparent platform, a Y3Al5O12:Ce3+ (YAG: Ce) phosphor-based phosphor-in-ceramics (PiC) converter with luminous efficacy as high as 190 lm W−1 is fabricated. The ultralow temperature enables the PiC converter to be further combined with red-emitting CaAlSiN3:Eu2+ (CASN:Eu), delivering a color-rendering index of 92. The cold-sintered CaF2 nanoceramic demonstrates great potential as a general solution for next-generation high-power LED lighting.
中文翻译：
高透明氟化钙纳米陶瓷的冷烧结作为高功率照明的通用平台
耐热的全无机颜色转换器对于高功率发光二极管 (LED) 照明至关重要。然而，由于在中等温度下实现高度透明的介质存在障碍，寻找一种用于封装多色荧光粉的通用无机基质仍然具有挑战性。据报道，得益于氧隔离 CaF 2纳米颗粒的酸介导冷烧结过程，氟化钙(CaF 2 ) 纳米陶瓷的致密化在仅 350 °C 下可见光透射率高达 75%。以光学各向同性CaF 2作为透明平台，制备了Y 3 Al 5 O 12 :Ce 3+制造了 发光效率高达190 lm W -1的（YAG：Ce）荧光粉陶瓷磷光体（PiC）转换器。超低温使 PiC 转换器能够进一步与发红光的 CaAlSiN 3 :Eu 2+ (CASN:Eu) 结合，提供 92 的显色指数。冷烧结的 CaF 2纳米陶瓷作为通用解决方案展现出巨大的潜力用于下一代高功率 LED 照明。
更新日期：2023-04-26
中文翻译：
高透明氟化钙纳米陶瓷的冷烧结作为高功率照明的通用平台
耐热的全无机颜色转换器对于高功率发光二极管 (LED) 照明至关重要。然而，由于在中等温度下实现高度透明的介质存在障碍，寻找一种用于封装多色荧光粉的通用无机基质仍然具有挑战性。据报道，得益于氧隔离 CaF 2纳米颗粒的酸介导冷烧结过程，氟化钙(CaF 2 ) 纳米陶瓷的致密化在仅 350 °C 下可见光透射率高达 75%。以光学各向同性CaF 2作为透明平台，制备了Y 3 Al 5 O 12 :Ce 3+制造了 发光效率高达190 lm W -1的（YAG：Ce）荧光粉陶瓷磷光体（PiC）转换器。超低温使 PiC 转换器能够进一步与发红光的 CaAlSiN 3 :Eu 2+ (CASN:Eu) 结合，提供 92 的显色指数。冷烧结的 CaF 2纳米陶瓷作为通用解决方案展现出巨大的潜力用于下一代高功率 LED 照明。
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