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Thermal stability of luminous YAG： Ce bulk ceramic as a remote phosphor prepared through silica-stabilizing valence of activator in air

ISSN号：1673-1905
期刊名称：《光电子快报：英文版》
时间：0
分类：TN248.13[电子电信—物理电子学] TQ127.2[化学工程—无机化工]
作者机构：[1]Institute of Materials Physics, School of Materials Science ＆ Engineering, Tianjin University of Technology, Tianjin 300384, China, [2]Key Lab of Display Materials ＆ Photoelectric Devices, Ministry of Education, Tianjin University of Technology, Tianjin 300384, China, [3]Tianjin Key Lab for Photoeleetronie Materials ＆ Devices, Tianjin University of Technology, Tianjin 300384, China
相关基金：This work has been supported by the National Natural Science Foundation of China （Nos.50872091, 50802062, and 21076161 ）, and the Key Discipline for Materials Physics and Chemistry of Tianjin in China （Nos. 10SYSYJC28100, 2006ZD30, and 06YFJMJC0230）.

作者：王鹏[1], 宋俊[1], 田华[1,3], 陆启飞[2], 王达健[1,2,3]

关键词： YAG激光器, 二氧化硅, 陶瓷制备, 热稳定性, 空气, 散装, 远程, 发光, Amorphous silicon, Ceramic materials, Light emission, Light emitting diodes, Luminance, Phosphors, X ray diffraction

中文摘要：

钇铝柘榴石的一个原型：Ce (Y3Al5O12 ) 象为白带的照明的遥远的黄磷陶器的发光体积通过硅石增加的策略在空中被制作。与在一个特定的范围增加硅石的数量，不透明的样品转弯半透明。晶体的降水被验证在由 X 光检查衍射(XRD ) 的纯钇铝柘榴石阶段。在硅石数量的限制以外，钇铝柘榴石水晶的主导的阶段被发现与最新形成的 Y2Si2O7， Al2O3 和非结晶的阶段的小数量共存。钇铝柘榴石晶体与约 2 m 的一种谷物尺寸并且均匀地散布。在经由在 5d 4f 转变的黄乐队排放的硅石结果的增加的结构的修正以后的钇铝柘榴石主人在由带的蓝色激动的 535 nm 附近达到顶点，由于到甚至当减少的空气不在时的 Ce3+ 的 Ce4+ 的自我减小。

英文摘要：

Aprototype of YAG： Ce （Y3Al5O12） luminous bulk ceramic as a remote phosphor for white LED illumination was fabricated in air through a strategy of silica addition. With increasing the amount of silica in a specific range, the opaque sample turns to be semi-transparent. The precipitation of crystals is verified to be in pure YAG phase by X-ray diffraction （XRD）. Beyond the limit of silica amount, the dominant phase of YAG crystal is found to coexist with a small amount of newly-formed Y2Si2O7, Al2O3 and the amorphous phase. The YAG crystals are with a grain size of approximately 2 μm and distribute evenly. The YAG hosts after structural modification via addition of silica result in yellow band emission of 5d → 4f transition peaked around 535 nm as excited by a blue LED, owing to the self-reduction of Ce^4＋ to Ce^3＋ even in the absence ofreductive atmosphere.