TiO2 as a sintering additive for KNbO3 ceramics

被引：13

作者：

Makovec, Darko ^{[1
]}

Pribosic, Irena ^{[1
]}

Drofenik, Miha ^{[1
]}

机构：

[1] Jozef Stefan Inst, SL-1000 Ljubljana, Slovenia

来源：

CERAMICS INTERNATIONAL | 2008年 / 34卷 / 01期

关键词：

sintering; niobates; TiO2; KNbO3;

D O I：

10.1016/j.ceramint.2006.08.008

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：

Improved densification during the conventional sintering of KNbO3 ceramics was achieved by using small additions of TiO2. This improved densification can be explained on the basis of high-temperature chemical reactions in the system. X-ray diffractometry and electron microscopy were used in combination with diffusion-couple experiments in order to elucidate the chemical reactions between KNbO3 and TiO2. TiO2 reacts with KNbO3 forming KNbTiO5, and a low concentration of Ti incorporates in the KNbO3 structure resulting in the formation of oxygen vacancies and, consequently, in an improvement in the densification. At similar to 1037 degrees C eutectic melting between the KNbO3 and the KNbTiO5 further improves the densification of the KNbO3 ceramics. (C) 2006 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：89 / 94

页数：6

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