Cost-effective synthesis of Ca-α-sialon:Eu2+ phosphors by a direct silicon nitridation route

被引：9

作者：

Yang, Xiu-Fang ^{[1
]}

Liu, Chang ^{[1
]}

Yang, Li-Xun ^{[1
]}

Xu, Xin ^{[1
]}

Simeon, Agathopoulos ^{[2
]}

机构：

[1] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Peoples R China

[2] Univ Ioannina, Dept Mat Sci & Engn, GR-45110 Ioannina, Greece

来源：

CERAMICS INTERNATIONAL | 2012年 / 38卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Sintering; Optical properties; Nitrides; Sialon; CA-ALPHA-SIALON; CARBOTHERMAL REDUCTION-NITRIDATION; LUMINESCENCE PROPERTIES; HOLLOW SPHERES; SR; PHOTOLUMINESCENCE; TEMPERATURE; CERAMICS; BA;

D O I：

10.1016/j.ceramint.2012.03.033

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The direct silicon nitridation method was used to synthesize Ca-alpha-sialon:Eu2+ phosphors. From a low cost CaCO3-AlF3-Si mixture, pure alpha-sialon phase was produced at a low temperature of 1250 degrees C. The crystallinity of the obtained phosphors can be markedly improved by increasing the firing temperature or post-annealing. Solid gas reactions occur easily, according to thermodynamic analysis, leading to loss of silicon and enhancing the replacement of Si-N bonds by Al-N bonds. The produced Ca-alpha-sialon:Eu2+ phosphors feature high purity, uniform and discrete particle morphology with a particle size of 1-2 mu m and good luminescence properties with a yellow emission that peaks at 580 nm under n-UV or blue light excitation. Crown Copyright (C) 2012 Published by Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：5239 / 5242

页数：4

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