QQ客服 官方微博 反馈留言

	掺杂Bi_2O_3对钛酸锶钡铁电陶瓷显微结构和介电性能的影响
	许春来 ; 周和平 ; Xu Chunlai ; Zhou Heping
	2010-07-19 ; 2010-07-19
关键词	钛酸锶钡 介电可调性 铁电材料 移相器 barium strontium titanate dielectric tunability ferroelectric material phase shifter TQ174.75
其他题名	Influence of Bi_2O_3 Doping on the Microstructure and Dielectric Properties of Barium Strontium Titanate Ferroelectric Ceramics
中文摘要	BSTO铁电陶瓷材料的介电常数随外加直流偏压的变化呈现非线性特性。纯BSTO材料由于较高的介电常数和较大的介电损耗不能满足移相器介质材料的要求,通过在BSTO中添加Bi_2O_3来改善BSTO铁电陶瓷材料的介电性能。结果表明:(1)在BSTO体系中微量掺杂Bi_2O_3,Bi~(3+)以取代Ba~(2+)的方式存在于钙钛矿的晶格中,形成均匀的固溶体Ba_(0.5-x)Bi_xSr_(0.5)TiO_3;(2)随Bi~(3+)添加量的增加,居里峰逐渐变宽,峰高逐渐降低,相变弥散效应增强;(3)Bi~(3+)的掺杂能细化晶粒,并显著降低BSTO体系的介电常数。; Ba_xSr_(1-x)TiO_3[(BSTO),0≤x≤1]is a solid solution ferroelectric material exhibiting a large dielectric constant non-linear change with an applied dc electric field.Pure BSTO can not satisfy the requirements of phase shifter due to its high dielectric constants and losses. It has been shown that the dielectric constants and losses of barium strontium titanate can be reduced by doping certain oxides.In this paper,we present systematic studies of the effect of Bi_2O_3 doping on BSTO bulk ceramics.The results showed that:(1)By adding Bi_2O_3 into BSTO bulk ceramics,Bi~(3+)substitute for Ba~(2+)cation sites at A position of ABO_3 perovskite structure to form homogeneous solid solution;(2)With the increase of Bi_2O_3-doping content,ferroelectric-paraelectric transition peaks become broadened,the maximum permittivity value decreases and dispersion phase transition effect is enhanced;(3)Proper quantity of Bi_2O_3 could reduce the grain size and dielectric constants of BSTO ceramics significantly.; 国家自然科学基金(50572050)
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/74570]
专题	清华大学
推荐引用方式 GB/T 7714	许春来,周和平,Xu Chunlai,等. 掺杂Bi_2O_3对钛酸锶钡铁电陶瓷显微结构和介电性能的影响[J],2010, 2010.
APA	许春来,周和平,Xu Chunlai,&Zhou Heping.(2010).掺杂Bi_2O_3对钛酸锶钡铁电陶瓷显微结构和介电性能的影响..
MLA	许春来,et al."掺杂Bi_2O_3对钛酸锶钡铁电陶瓷显微结构和介电性能的影响".(2010).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。