Effects of the sintering atmosphere on Nb-based dielectrics

被引：7

作者：

d'Astorg, Sophie ^{[1
]}

Marinel, Sylvain ^{[1
]}

机构：

[1] ENSICAEN, CNRS, Crismat Lab, UMR6508, F-14050 Caen, France

来源：

CERAMICS INTERNATIONAL | 2007年 / 33卷 / 08期

关键词：

sintering; dielectric properties; niobates;

D O I：

10.1016/j.ceramint.2006.05.013

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 effects of a forming atmosphere on the stability, the sintering and the dielectric properties of Ba5Nb4O15, BaNb2O6, ZnNb2O6 and Zn3Nb2O8 ceramics were investigated, because of the primary importance of the sintering atmosphere in relation to copper sintering. These Nb-based materials were sintered in air and in Ar/H(2)10%. Zn-containing samples are very sensitive to the reductive atmosphere. ZnO volatilises at 800-850 degrees C and the resulting compound does not exhibit the expected properties. BaNb2O6 and Ba5Nb4O15 are more stable in term of relative weight loss. Nevertheless, the phase analysis reveals a modification of the BaNb2O6 phase, what induces the degradation of the dielectric property stability versus temperature. The properties of Ba5Nb4015 are not modified by a sintering in reductive atmosphere. A relative permittivity of 38.8, a permittivity temperature coefficient of -150 ppm degrees C-1 and an insulating resistivity of 10(10.9) Omega cm were obtained for this latter. (c) 2006 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：1515 / 1519

页数：5

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