砂磨固相法快速制备Ca掺杂的BaTiO3陶瓷及其结构和电性能研究
The structure and electrical properties of Ca doped BaTiO3 ceramics rapidly prepared by sand grinding solid phase method
林彤 1郭全胜 1潘瑞琨1
作者信息
- 1. 湖北大学材料科学与工程学院,湖北 武汉 430062
- 折叠
摘要
Ca2+可掺杂在 BaTiO3(BT)陶瓷的 A及 B位.本文中系统研究 B位掺杂 Ca元素对 BaTiO3 陶瓷的相结构与微观形貌、介电性能、可靠性和铁电性能的影响.采用砂磨-固相反应-造粒-压片方法制备 BaTi1-x Cax O3-x(BTC-x,其中 x=0,0.01,0.02,0.03,0.04)陶瓷样品.随着 Ca掺杂量的增加,陶瓷样品的晶粒尺寸先增大后减小,样品居里温度 Tc 持续降低,其中 BTC-1 样品具有较高和较宽的介电峰及极小的损耗.利用高温阻抗谱对样品进行了可靠性分析,可知 BTC-2的电学失效的风险最分散.由 P-E电滞回线可知:在掺杂样品中,BTC-2 的 Pmax 值最大,归因于其内部可供极化的空间电荷浓度高.综上所述,当 Ca元素在 BT的 B位掺杂量较低时,BTC材料具有良好的介电性能及可靠性,能应用于片式多层陶瓷电容器(Multi-layer Ceramic Capacitors,MLCC)行业.
Abstract
Ca2+ions can be doped at A and B sites in BaTiO3(BT)ceramics.This research systematically investigated the effects of B-site doping of Ca element on the phase structure,microstructure,dielectric properties,reliability,and ferroelectric properties of BaTiO3 ceramics BaTi1-x Cax O3-x(BTC-x,x=0,0.01,0.02,0.03,0.04)ceramic samples were prepared using a sand grinding solid phase reaction granulation pressing method.As the Ca doping amount increased,the grain size of the ceramic sample increased at first and then decreased,and the Curie temperature Tc of the sample continued to decrease.Among them,the BTC-1 sample had a high and wide dielectric peak and minimal loss.The reliability analysis of the sample was conducted using high-temperature impedance spectroscopy,and it was found that the risk of electrical failure of BTC-2 was the most dispersed.According to the hysteresis loop of P-E,it could be seen that the Pmax value of BTC-2 was the highest in the doped sample,attributed to the high concentration of space charges available for polarization inside.In summary,when the doping amount of Ca element in the B site of BT is low,BTC material has good dielectric properties and reliability,which can be applied in Multi-layer Ceramic Capacitors(MLCC)industry.
关键词
固相烧结/B位掺杂/BaTiO3/陶瓷/介电性能Key words
solid phase sintering/B-site doping/BaTiO3 ceramics/dielectric performance引用本文复制引用
出版年
2025
NETL
NSTL
万方数据