(Li, Ta, Sb) modified (K, Na)NbO3 ceramics as high temperature dielectric materials

被引：8

作者：

Zhang, Zhiqiang ^{[1
,2
]}

Wu, Ying ^{[1
,2
]}

Miao, Jiyuan ^{[1
,2
]}

Liu, Zhifu ^{[1
]}

Li, Yongxiang ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Inorgan Funct Mat & Devices, Shanghai 200050, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] RMIT Univ, Sch Elect & Comp Syst Engn, Melbourne, Vic 3001, Australia

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷

基金：

中国国家自然科学基金;

关键词：

KNLNTS; Relaxor behavior; Compositional inhomogeneity; High temperature MLCCs; PIEZOELECTRIC PROPERTIES; MICROSTRUCTURE; CAPACITORS; SYSTEM;

D O I：

10.1016/j.ceramint.2015.03.301

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：

A high temperature dielectric material of (Li, Ta, Sb) modified (K, Na)NbO3 (KNLNTS) ceramics with excellent temperature stability was prepared by a reactive templated grain growth (RTGG) method. The effects of sintering temperature on the phase structure, microstructure and electric properties of the ceramics were investigated. The XRD and SEM results revealed that the structure and microstructure of the ceramics could be controlled by changing the sintering temperature. Multiphase and cation disordering in the ceramics due to compositional inhomogeneity resulted in relaxor behavior, thus improving the temperature stability of the ceramics greatly. The KNLNTS ceramics sintered at 1150 degrees C exhibit high permittivity maximum (similar to 2000) and low dielectric loss (< 4%) at a temperature range of 120-335 degrees C, and the capacitance variation (Delta C/C-185 degrees C) maintains within +/- 15% at this temperature range, showing that KNLNTS ceramics is a promising candidate for high temperature MLCCs applications. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：S9 / S14

页数：6

共 18 条

[1] Relaxorlike dielectric properties and history-dependent effects in the lead-free K0.5Na0.5NbO3-SrTiO3 ceramic system [J].