Structure and enhanced dielectric temperature stability of BaTiO3- based ceramics by Ca ion B site-doping  

作　　者：Xuewen Jiang Hua Hao Yang Yang Enhao Zhou Shujun Zhang Ping Wei Minghe Cao Zhonghua Yao Hanxing Liu 

机构地区：[1]Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory,Xianhu Hydrogen Valley,Foshan,528200,China [2]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,School of Materials Science and Engineering,Wuhan University of Technology,Wuhan,430070,China [3]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,International School of Material Science and Engineering,Wuhan University of Technology,Wuhan,430070,China [4]Institute for Superconducting and Electronic Materials,Australian Institute of Innovative Materials,University of Wollongong,Wollongong,NSW,2500,Australia [5]Nanostructure Research Centre,Wuhan University of Technology,Wuhan,430070,China

出　　处：《Journal of Materiomics》2021年第2期295-301,共7页无机材料学学报（英文）

基　　金：supported by NSFC-Guangdong Joint Funds of the Natural Science Foundation of China(No.U1601209);Major Program of the Natural Science Foundation of China(51790490);Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory,Natural Science Foundation of China(51872213);the Fundamental Research Funds for the Central Universities(2017YB011).

摘　　要：Capacitor is an important part of many electronic devices,so the temperature stability as one key parameter of capacitor needs to be improved constantly for meeting the requirements of various application temperature.Here,combined with the X-ray diffraction(XRD),selected area electron diffraction(SAED)and Vienna Ab-initio Simulation Package(VASP)calculation,it was confirmed that Ca ion can substitute the Ti site in the BaTi1-xCaxO3-x[BTC100](0≤x≤0.05)ceramics synthesized by solid-phase method which greatly improved the low-temperature stability of dielectric constant.Moreover,introducing Bi3þand Zn^(2+) into BTC4 to form(1-y)BaTi0.6Ca0.04O2.96-yBi(Zn_(0.5)Ti_(0.5))O_(3)[(1-y)BTC4-yBZT](0.1≤y≤0.2)ceramics can further improve the dielectric-temperature stability by means of diffused phase transition and core-shell structure.Most importantly,the 0.85BTC4-0.15BZT ceramics with a pseudocubic perovskite structure possessed a temperature coefficient of capacitance at 25℃(TCC25℃)being less than±15%over a wide temperature range of 55℃-200℃and a temperate dielectric constant(ε=1060)and low dielectric loss(tanδ=1.5%),which measure up to the higher standard in the current capacitor industry such as X9R requirements.

关 键 词：BATIO3 Ca substituted X9R capacitors Dielectric properties 

分 类 号：TQ174.1[化学工程—陶瓷工业]