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High-thermal-conductivity and high-luminous-efficiency composite fluorescent ceramic for laser illumination and preparation method thereof
The invention discloses a high-thermal-conductivity and high-luminous-efficiency composite fluorescent ceramic for laser illumination and a preparation method thereof. The composite fluorescent ceramic is composed of bowl-shaped fluorescent ceramic and Al2O3 ceramic wrapping the periphery of the bowl-shaped fluorescent ceramic, the bowl-shaped fluorescent ceramic is composed of (Re1-xCex) 3Al5O12, Re is one or more of Y, Lu, Gd and Tb, x is larger than or equal to 0.0005 and smaller than or equal to 0.005, and the parameters of the bowl-shaped fluorescent ceramic are as follows: the curvature is 0.2-0.8, the bottom diameter is 5-30 mm, and the height is 0.5-3 mm. The preparation method comprises the following steps: preparing a fluorescent ceramic biscuit by adopting a gel casting method, wrapping the periphery of the fluorescent ceramic biscuit with Al2O3 ceramic powder, carrying out dry pressing molding, and carrying out vacuum sintering, air annealing and surface polishing treatment to obtain the composite fluorescent ceramic. The prepared composite ceramic realizes high-brightness white light emission under the excitation of a blue light LD chip with the wavelength of 455nm, the bearable excitation power density is 45W/mm < 2 >-55W/mm < 2 >, the luminous efficiency is 200-260lm/W, and the thermal conductivity is 20-26Wm <-1 > k <-1 >.
本发明公开了一种激光照明用高热导高光效复合荧光陶瓷及其制备方法。所述复合荧光陶瓷由碗状荧光陶瓷和包覆在碗状荧光陶瓷周围的Al2O3陶瓷组成，所述碗状荧光陶瓷的组成为(Re1‑xCex)3Al5O12，Re为Y、Lu、Gd、Tb中的一种或多种，0.0005≤x≤0.005，碗状荧光陶瓷的参数为：曲率0.2～0.8，底部直径5～30mm，高度0.5～3mm。先采用凝胶注模法制备荧光陶瓷素坯，再在荧光陶瓷素坯四周包裹Al2O3陶瓷粉体，干压成型，经真空烧结、空气退火、表面抛光处理后得到复合荧光陶瓷。本发明制备的复合陶瓷的在波长为455nm蓝光LD芯片激发下，实现高亮白光发射，可承受激发功率密度为45W/mm2～55W/mm2，发光效率200～260lm/W，其热导率为20～26Wm‑1k‑1。
High-thermal-conductivity and high-luminous-efficiency composite fluorescent ceramic for laser illumination and preparation method thereof
The invention discloses a high-thermal-conductivity and high-luminous-efficiency composite fluorescent ceramic for laser illumination and a preparation method thereof. The composite fluorescent ceramic is composed of bowl-shaped fluorescent ceramic and Al2O3 ceramic wrapping the periphery of the bowl-shaped fluorescent ceramic, the bowl-shaped fluorescent ceramic is composed of (Re1-xCex) 3Al5O12, Re is one or more of Y, Lu, Gd and Tb, x is larger than or equal to 0.0005 and smaller than or equal to 0.005, and the parameters of the bowl-shaped fluorescent ceramic are as follows: the curvature is 0.2-0.8, the bottom diameter is 5-30 mm, and the height is 0.5-3 mm. The preparation method comprises the following steps: preparing a fluorescent ceramic biscuit by adopting a gel casting method, wrapping the periphery of the fluorescent ceramic biscuit with Al2O3 ceramic powder, carrying out dry pressing molding, and carrying out vacuum sintering, air annealing and surface polishing treatment to obtain the composite fluorescent ceramic. The prepared composite ceramic realizes high-brightness white light emission under the excitation of a blue light LD chip with the wavelength of 455nm, the bearable excitation power density is 45W/mm < 2 >-55W/mm < 2 >, the luminous efficiency is 200-260lm/W, and the thermal conductivity is 20-26Wm <-1 > k <-1 >.
本发明公开了一种激光照明用高热导高光效复合荧光陶瓷及其制备方法。所述复合荧光陶瓷由碗状荧光陶瓷和包覆在碗状荧光陶瓷周围的Al2O3陶瓷组成，所述碗状荧光陶瓷的组成为(Re1‑xCex)3Al5O12，Re为Y、Lu、Gd、Tb中的一种或多种，0.0005≤x≤0.005，碗状荧光陶瓷的参数为：曲率0.2～0.8，底部直径5～30mm，高度0.5～3mm。先采用凝胶注模法制备荧光陶瓷素坯，再在荧光陶瓷素坯四周包裹Al2O3陶瓷粉体，干压成型，经真空烧结、空气退火、表面抛光处理后得到复合荧光陶瓷。本发明制备的复合陶瓷的在波长为455nm蓝光LD芯片激发下，实现高亮白光发射，可承受激发功率密度为45W/mm2～55W/mm2，发光效率200～260lm/W，其热导率为20～26Wm‑1k‑1。
High-thermal-conductivity and high-luminous-efficiency composite fluorescent ceramic for laser illumination and preparation method thereof
一种激光照明用高热导高光效复合荧光陶瓷及其制备方法
WANG TING (author) / ZHANG LE (author) / WANG JINHUA (author) / SANG PENGFEI (author) / LIU XUANCHU (author) / LIU ZITONG (author) / KANG JIAN (author) / ZHOU CHUNMING (author) / ZHOU TIANYUAN (author) / CHEN HAO (author)
2023-11-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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