铪钛酸钡陶瓷制备及其压电性能的微观机制研究  

Preparation of hafnium barium titanate ceramics and micro-mechanism of their piezoelectric properties

作　　者：李雄伟 尹红梅 周恒为 赵兴宇 黄以能 LI Xiongwei;YIN Hongmei;ZHOU Hengwei;ZHAO Xingyu;HUANG Yineng(Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters,College of Physical Science and Technology,Yili Normal University,Yining 835000,Xinjiang Uygur Autonomous Region,China;National Laboratory of Solid State Microstructures,Nanjing University,Nanjing 210008,China)

机构地区：[1]伊犁师范大学物理科学与技术学院新疆凝聚态相变与微结构实验室,新疆伊宁835000 [2]南京大学固体微结构物理国家重点实验室,江苏南京210008

出　　处：《电子元件与材料》2024年第3期277-283,共7页Electronic Components And Materials

基　　金：新疆维吾尔自治区重点实验室开放课题(2020D04011);伊犁师范大学博士启动基金(2021YSBS008);新疆维吾尔自治区普通高校重点学科开放课题(XJZDXK-phy201809)。

摘　　要：采用传统固相反应法制备系列BaHf_(x)Ti_(1-x)O_(3)陶瓷,通过对陶瓷的压电、铁电、相组成、晶粒尺寸的测试和分析,发现:所有BaHf_(x)Ti_(1-x)O_(3)陶瓷样品均具有纯钙钛矿结构,室温均为铁电体具有压电性;在x<0.1时室温压电系数为195~327p C/N,x=0.02时,压电系数、剩余极化强度和平均晶粒尺寸最大,分别为327pC/N,13.3μC/cm^(2)和37.2μm,大晶粒尺寸和四方-正交-三方多相共存是其具有大压电系数的主要原因。BaHf_(x)Ti_(1-x)O_(3) ceramics were prepared by traditional solid-state reaction,and their piezoelectric and ferroelectric properties,phase composition,and grain size were characterized and analyzed.The results indicate that all ceramics have pure perovskite structure,and are ferroelectric at room temperature with piezoelectricity.At x<0.1,the piezoelectric coefficient is 195-327 pC/N.The ceramic at x=0.02 has the highest piezoelectric coefficient of 327 pC/N,residual polarization strength of 13.3μC/cm^(2),and average grain size of 37.2μm.The high piezoelectric coefficient is due to the large grain size and coexistence of the tetragonal-orthogonal-rhombohedral multiphase.

关 键 词：铪钛酸钡 固相反应 微观机制 压电系数 

分 类 号：TM282[一般工业技术—材料科学与工程]