K^(+)掺杂对BNT基压电陶瓷结构与性能的影响  

Effect of K^(+)Doping on the Structure and Properties of BNT-based Piezoelectric Ceramics

作　　者：武家莹 房国丽[1] 郭小雷 范玉杰 WU Jiaying;FANG Guoli;GUO Xiaolei;FAN Yujie(School of Materials Science and Engineering,North Minzu University,Yinchuan 750021,China;Ningxia Kunda Automation Technology Co.,Ltd.,Yinchuan 750021,China)

机构地区：[1]北方民族大学材料科学与工程学院,宁夏银川750021 [2]宁夏坤达自动化科技有限公司,宁夏银川750021

出　　处：《宁夏工程技术》2024年第2期109-114,共6页Ningxia Engineering Technology

基　　金：银川市校企联合创新发展专项(2022XQ002);宁夏回族自治区重点研发计划重大(重点)项目(2019BFG02018);北方民族大学高层次人才计划项目。

摘　　要：采用微波辅助溶胶-凝胶法合成xKBNT粉体,烧结后形成三方结构的xKBNT压电陶瓷,系统研究了K^(+)掺杂浓度对xKBNT陶瓷微观结构、电导率、压电性能和介电性能的影响。结果表明:K^(+)掺杂有利于改善xKBNT陶瓷的压电性能和介电性,掺杂引起的晶格畸变是影响陶瓷xKBNT晶粒尺寸、致密度,以及压电性能和介电性能的主要因素。0.04KBNT压电陶瓷的压电常数d_(33)为28.8 pC/N,介电常数ε_(r)为1349.8,远高于单相BNT的d_(33)和ε_(r)。xKBNT powders were synthesized using the microwave-assisted sol-gel method and subsequently sintered to form xKBNT piezoelectric ceramics with a rhombohedral structure.The effects of K^(+)doping concentration on the micro-structure,conductivity,piezoelectric and dielectric properties of xKBNT ceramics were systematically studied.It is found that K^(+)doping enhances the piezoelectric and dielectric properties of xKBNT ceramics.The lattice distortion caused by doping significantly affects the grain size,relative density,piezoelectric and dielectric properties of xKBNT ceramics.The piezoelectric constant d_(33) and dielectric constant ε_(r) of 0.04KBNT are 28.8 pC/N and 1349.8,respectively,which are significantly higher than those of pure BNT ceramics.

关 键 词：钛酸铋钠 掺杂改性 微波辅助溶胶-凝胶法 压电常数 

分 类 号：TM282[一般工业技术—材料科学与工程] TQ174.1[电气工程—电工理论与新技术]