Preparation and characterization of Co2+-doped Y3Al5O12 nano-crystal powders by sol-gel technique

被引：18

作者：

Sun, ZH ^{[1
]}

Yuan, DR ^{[1
]}

Duan, XL ^{[1
]}

Wei, XC ^{[1
]}

Sun, HQ ^{[1
]}

Luan, C ^{[1
]}

Wang, ZM ^{[1
]}

Shi, XZ ^{[1
]}

Xu, D ^{[1
]}

Lv, M ^{[1
]}

机构：

[1] Shandong Univ, Inst Crystal Mat, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

来源：

JOURNAL OF CRYSTAL GROWTH | 2004年 / 260卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

characterization; X-ray diffraction; nanomaterials;

D O I：

10.1016/j.jcrysgro.2003.08.025

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Co2+-doped Y3Al5O12 (Co2+:YAG) nanocrystalline powder sample was obtained by sol-gel method. The gel with the composition Of CoO-Y2O3-Al2O3 was prepared from nitrates of yttrium, aluminum, cobalt and citric acid, and was heat-treated at temperatures ranging from 400 to 1000degreesC. The heated powder samples at different temperatures were characterized by X-ray diffraction analysis (XRD), transmission electron microscope (TEM), infrared spectra (IR) and emission spectra. Results showed that when the gel was heat-treated at 800degreesC, YAG nanocrystals with sizes 30-70 nm were formed. The emission spectrum of the heat-treated powders is identical to that of tetrahedral Co2+ ions, which shows that Co2+ ions are embedded in the lattice sites of YAG nanocrystals and are coordinated with four oxygens. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：171 / 175

页数：5

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