Vapor transport equilibration-induced formation of micron-sized ErNbO4 precipitates in Zn/Er-codoped LiNbO3 crystals

被引：2

作者：

Zhang, De-Long ^{[1
,2
]}

Hua, Ping-Rang ^{[1
]}

Sun, Liang ^{[3
]}

Xu, Yu-Heng ^{[3
]}

Pun, E. Y. B. ^{[2
]}

机构：

[1] Tianjin Univ, Coll Precis Instruments & Optoelect Engn, Dept Optoelect & Informat Engn, Tianjin 300072, Peoples R China

[2] City Univ Hong Kong, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China

[3] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

来源：

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 2008年 / 28卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Zn:Er:LiNbO3 crystal; Vapor transport equilibration; Phase transformation; Micron-sized ErNbO4 precipitate; Morphology;

D O I：

10.1016/j.msec.2008.01.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Congruent LiNbO3 crystals with Zn/Er-doping levels of 5.5/1, 6/0.15 and 7/0.8 mol%/mol% were thermally treated at 1100 degrees C over 101 h using vapor transport equilibration (VTE) technique. It is shown that the VTE treatment has brought these crystals closer to stoichiometric composition. X-ray powder diffraction and Er3+ spectroscopic characterizations show that the VTE treatment induced formation of micron-sized ErNbO4 precipitates on the surface and in the bulk of all crystals studied. It was observed using an optical microscope that the precipitates grow preferably along X, Y and Z axes of the host matrix, and show different morphologies, densities and dimensions, depending oil the Er3+ and Zn3+ doping level. The formation origin of the precipitate is qualitatively explained. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1289 / 1296

页数：8

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