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白光发光二极管用Eu:(Y0.9La0.1)2O3 透明陶瓷的制备及性能
作者:刘强1 孙堃1 2 李江2 袁勇1 2 刘婧1 2 林丽1 2 潘裕柏2 郭景坤2 
单位:1. 江苏大学材料科学与工程学院 江苏 镇江 212013  2. 中国科学院上海硅酸盐研究所透明光功能无机材料重点实验室 上海 200050 
关键词:铕掺杂氧化镧钇 透明陶瓷 白光发光二极管 显微结构 光谱性能 
分类号:TQ 129
出版年,卷(期):页码:2015,43(5):643-649
DOI:10.14062/j.issn.0454-5648.2015.05.13
摘要:

 以Y2O3 为原料、La2O3 为烧结助剂,采用真空烧结法制备了 (Y1-xLax)2O3 透明陶瓷。研究了La2O3 添加量对Y2O3

陶瓷致密化行为的影响,确定La2O3 的最佳添加量(摩尔分数)为10.0%。在此基础上制备了不同掺杂量(摩尔分数)的
Eu:(Y0.9La0.1)2O3 透明荧光陶瓷,研究了Eu3+掺杂浓度对陶瓷显微结构、光学性能及光谱特性的影响。结果表明:随着掺杂量
的增加,Eu:(Y0.9La0.1)2O3 陶瓷(1 765 ℃×50 h)的晶粒尺寸变化较小。其中,0.3% Eu:(Y0.9La0.1)2O3 陶瓷的晶粒尺寸均匀(约为177.6
μm),厚度为1 mm 的陶瓷样品在800 nm 处的直线透过率为62%。随着Eu3+掺杂浓度的增加,Eu:(Y0.9La0.1)2O3 陶瓷的各个激
发峰与发射峰强度变强。当激发波长为466 nm 时,发射主峰位于红光波段611 nm 处,属于Eu3+离子的5D0 →7F2 跃迁。研究
表明Eu:(Y0.9La0.1)2O3 透明陶瓷在白光发光二极管上具有潜在的应用价值。

 (Y1-xLax)2O3 transparent ceramics were prepared via vacuum sintering with commercial Y2O3 as starting powders and

La2O3 as a sintering aid. The influence of La2O3 addition on the densification evolution of (Y1-xLax)2O3 ceramics was investigated.
The results show that the optimal La2O3 addition (in mole fraction) is 10.0%. Eu:(Y0.9La0.1)2O3 ceramics were fabricated at different
Eu3+ contents. The influence of Eu3+ content on the microstructure, optical transmission and fluorescence properties was mainly
investigated. The results show that the grain size of Eu:(Y0.9La0.1)2O3 transparent ceramics sintered at 1765 ℃ for 50 h varies slightly
when the Eu3+ content increases. The 0.3% Eu:(Y0.9La0.1)2O3 transparent ceramic has the uniform grain size of 177.6 μm. The in-line
transmittance of the ceramic sample with the thickness of 1 mm is 62% at the wavelength of 800 nm. Besides, the intensities of all
excitation and emission peaks increase with the increase of Eu3+ content. When 0.3%Eu:(Y0.9La0.1)2O3 ceramic is excited at 466 nm,
the major emission peak is located at the red-light wavelength of 611 nm, which attributes to the 5D0→7F2 transition of Eu3+. It is
indicated that the Eu:(Y0.9La0.1)2O3 transparent ceramics could have potential applications for white light emitting diodes.
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基金项目:
国家自然科学基金重大项目(50990301);国家自然科学基金青年基金项目(51302298)。
作者简介:
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