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.
作者
武家莹
房国丽
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)
出处
《宁夏工程技术》
CAS
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。
关键词
钛酸铋钠
掺杂改性
微波辅助溶胶-凝胶法
压电常数
sodium bismuth titanate
doping modification
microwave-assisted sol-gel method
piezoelectric constant
