Effect of preparation conditions on cation ordering and dielectric properties of Ba(Mg1/3Ta2/3)O3 ceramics

被引：35

作者：

Kolodiazhnyi, TV

Petric, A ^{[1
]}

Johari, GP

Belous, AG

机构：

[1] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON L8S 4L7, Canada

[2] Inst Gen & Inorgan Chem, UA-142 Kiev, Ukraine

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2002年 / 22卷 / 12期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Ba(Mg; Ta)O-3; dielectric properties; ordering; perovskites; phase development;

D O I：

10.1016/S0955-2219(01)00515-5

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 effect of preparation conditions on cation ordering and dielectric properties of Ba(Mg1/3Ta2/3)O-3 ceramics was investigated. Preparation of Ba(Mg1/3Ta1/3)O-3 by conventional synthesis from BaCO3, MgO, and Ta2O5 was compared to an alternate route of reaction of MgTa2O6 with BaCO3. It was shown that in the conventional synthesis method, intermediate phases inhibit formation of single-phase Ba(Mg1/3Ta2/3)O-3 up to 1400 degreesC, whereas utilization of a MgTa2O6 precursor produces the nearly pure perovskite phase after heat treatment at 1000 degreesC. In the temperature range of 1400-1620degreesC, the Ba(Mg1/3Ta2/3)O-3 ceramic remains single phase. Traces of the Ba3Ta5O15 phase were detected by XRD and EDX in samples sintered above 1630 degreesC. Decrease in the 1:2 cation ordering and increase of dielectric loss were observed in samples sintered at T> 1590 degreesC. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：2013 / 2021

页数：9

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