流延等静压成型法制备YAG:Ce荧光陶瓷:性能及应用

Synthesis of Luminescent Ceramic YAG:Ce by Tape-Casting-Isostatic-Pressing Technique:Properties and Lighting Application

采用水基流延等静压成型工艺,结合高温固相烧结成功制备了YAG:Ce荧光陶瓷。为考察水基流延等静压成型工艺对YAG:Ce荧光陶瓷产品性能的影响,在平行条件下制备了非水基YAG:Ce荧光陶瓷。与非水基荧光陶瓷相比,采用水基流延等静压成型工艺制备的YAG:Ce荧光陶瓷的X射线衍射(XRD)衍射强度明显增强,样品粒径分布更均匀,荧光激发和发射强度明显增强,平均荧光寿命延长,热稳定性提高。因此,基于水基荧光陶瓷的白光,其显色指数(68.8)和发光效率(169.18 lm∙W^(-1))明显提升。本研究为水基和非水基流延等静压成型-高温固相烧结制备YAG:Ce荧光陶瓷的相关研究奠定了一定的理论和实验依据。

The luminescent ceramic YAG:Ce was prepared successfully by aqueous tape-casting-isostatic-press⁃ing technique combining with high temperature solid state method.To fully investigate the effect of aqueous tapecasting-isostatic-pressing on luminescent ceramic YAG:Ce,the sample based on none-aqueous tape-castingisostatic-pressing was developed under parallel conditions.In contrast,YAG:Ce luminescent ceramic based on aqueous tape-casting-isostatic-pressing exhibited a relative stronger X-ray diffraction intensity,more uniform in particle size distribution,better photoluminescence properties and average lifetime as well as an enhanced ther⁃mal stability.As a result,the luminescent ceramic based on aqueous tape-casting-isostatic-pressing presented an improvement of color rendering index(Ra=68.8)and luminous efficiency(169.18 lm∙W^(-1)).This study pro⁃vides valuable theoretical and experimental information for aqueous and none-aqueous tape casting processing es⁃tablished luminescent ceramic developed by high temperature solid state method.