您的位置:首页  > 论文页面

钨青铜结构Sr2K0.1Na0.9Nb5O15无铅

发表时间:2009-11-30  浏览量:1134  下载量:551
全部作者: 魏灵灵,刘忠山,杨祖培
作者单位: 陕西师范大学化学与材料科学学院
摘 要: 在传统固相技术的基础上,引入二步合成法成功制备了Sr2K0.1Na0.9Nb5O15无铅压电陶瓷。研究了不同烧结温度对陶瓷相结构、微观组织结构和电性能的影响。结果表明:在不同烧结温度下,所获陶瓷均为四方相钨青铜结构。随着烧结温度的升高,陶瓷致密度和电性能都呈现出先升高后降低的趋势。当预烧温度为1 180℃和1 340℃时,陶瓷致密性最好,陶瓷晶粒比较均匀,介电常数(εr)、介电损耗(tanδ)和居里温度(TC)同时达到最佳值,分别为1 221℃,0.015 9℃和270℃.
关 键 词: 功能材料;无铅压电陶瓷;微观结构;压电性能;介电性能
Title: Study on the preparation and electrical properties of Sr2K0.1Na0.9Nb5O15 lead-free piezoelectric ceramics
Author: WEI Lingling, LIU Zhongshan, YANG Zupei
Organization: College of Chemistry & Materials Science, Shaanxi Normal University
Abstract: In this paper, lead-free Sr2K0.1Na0.9Nb5O15 ceramics were prepared by conventional solid state method. The effects of sintering temperature on phase structure, microstructure and electrical properties of Sr2K0.1Na0.9Nb5O15 ceramics were investigated. The XRD analysis results showed that the obtained ceramics were all pure tungsten bronze structure Sr2K0.1Na0.9Nb5O15 when the sintering temperature was from 1 300 to 1 360℃. With increasing the sintering temperature, the relative density and electrical properties of the obtained ceramics all increased firstly, and decreased after reaching the maximum. The ceramics sintered at 1 340℃ achieved uniform grain size, higher density and better properties, which were as follows: εr =1 221, tanδ=0.015 9, and TC=270℃.
Key words: functional materials; lead-free piezoelectric ceramics; microstructure; piezoelectric properties; dielectric properties
发表期数: 2009年11月第22期
引用格式: 魏灵灵,刘忠山,杨祖培. 钨青铜结构Sr2K0.1Na0.9Nb5O15无铅[J]. 中国科技论文在线精品论文,2009,2(22):2435-2440.
 
0 评论数 0
暂无评论
友情链接