硅酸盐学报

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：

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.

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：

刘强(1964—)，男，博士，教授。

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