砂磨固相法快速制备Ca掺杂的BaTiO_(3)陶瓷及其结构和电性能研究  

The structure and electrical properties of Ca doped BaTiO_(3)ceramics rapidly prepared by sand grinding solid phase method

作　　者：林彤 郭全胜 潘瑞琨[1] LIN Tong;GUO Quansheng;PAN Ruikun(Department of Materials Science and Engineering,Hubei University,Wuhan 430062,China)

机构地区：[1]湖北大学材料科学与工程学院,湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2025年第1期153-162,共10页Journal of Hubei University：Natural Science

摘　　要：Ca^(2+)可掺杂在BaTiO_(3)(BT)陶瓷的A及B位。本文中系统研究B位掺杂Ca元素对BaTiO_(3)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BaTi_(1-x)Ca_(x)O_(3)-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T_(c)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P_(max)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。Ca^(2+)ions can be doped at A and B sites in BaTiO_(3)(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 BaTiO_(3)ceramics BaTi_(1-x)Ca_(x)O_(3)-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 T_(c) 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 P_(max) 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 BaTiO_(3)陶瓷 介电性能 

分 类 号：O469[理学—凝聚态物理]