Densification and frequency dielectric response (10(2) to 10(9) Hz) of ferroelectric K(Ta0.5Nb0.5)O-3 ceramics

被引：6

作者：

Dubernet, P

Ravez, J

Pigram, A

机构：

[1] Institut de Chimie de la Matière Condensée de Bordeaux, Pessac

来源：

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH | 1995年 / 152卷 / 02期

关键词：

D O I：

10.1002/pssa.2211520224

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The frequency dielectric response in K(Ta0.5Nb0.5)O-3 ceramics (KTN) is investigated over the temperature range 280 to 450 K and over a wide range of frequency (10(2) to 10(9) Hz). The KTN ceramics are sintered using Li2CO3 as an addition, allowing liquid phase sintering. Dielectric measurements are performed on two samples:a fast fired sample and a conventionally fired one. The ferroelectric-paraelectric transition occurs at T-C approximate to 380 K; it is a first-order transition. Two dielectric dispersions are observed: a polydispersive low Frequency one (10(2) to 10(5) Hz) and a high frequency relaxation (10(8) to 10(9) Hz). The latter is explained on the basis of correlation chains or correlation volumes in a double potential well model.

引用

页码：555 / 562

页数：8

共 11 条

[1] CHAIN STRUCTURE OF BATIO3 AND KNBO3 [J].