MgNb_(2)O_(6)掺杂(Ba,Sr)TiO_(3)基电容器陶瓷介电性能的研究  

Study on Dielectric Properties of(Ba,Sr)TiO_(3)-Based Capacitor Ceramics Doped with MgNb_(2)O_(6)

作　　者：陈映义 陈磊[2] 彭道华 陈甲天 陈应和 黄新友[2] 牛继恩 CHEN Yingyi;CHEN Lei;PENG Daohua;CHEN Jiatian;CHEN Yinghe;HUANG Xinyou;NIU Jien(Fujian Ruisheng Electronic Technology Co.,Ltd,Zhangzhou 363500,China;School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]福建瑞升电子科技有限公司,福建漳州363500 [2]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《压电与声光》2024年第5期704-709,共6页Piezoelectrics & Acoustooptics

基　　金：广东省教育部产学研结合资助项目(2011B090400027)。

摘　　要：采用固相法制备MgNb_(2)O_(6)(MNO)掺杂(Ba_(0.79)Sr_(0.21))TiO_(3)((Ba,Sr)TiO_(3))基电容器陶瓷。采用XRD、SEM等研究了MgNb_(2)O_(6)掺杂对(Ba,Sr)TiO_(3)基电容器陶瓷的物相、显微结构及介电性能影响。结果表明,随着MNO掺杂量的增加,(Ba,Sr)TiO_(3)基电容器陶瓷的介电常数逐渐减小,陶瓷的介电损耗先增大后减小再增大,陶瓷的电阻率先减小后增大再减小,陶瓷的耐压强度先减小后增大再减小。当MNO掺杂量(质量分数)为2.0%时,陶瓷的介电常数达到最大值(为1670),陶瓷的介电损耗有最小值(为0.0056)。当MNO掺杂量(质量分数)为8%时,陶瓷的电阻率有最大值(为65.23×10^(10)Ω·cm),耐压强度的最大值为7.7 kV/mm(DC)。当掺杂MNO量(质量分数)为10%时,陶瓷的电容温度变化率为+0.18%,-28.29%。MNO掺杂(Ba,Sr)TiO_(3)基电容器陶瓷是钙钛矿结构。掺杂MNO能够降低陶瓷的电容温度变化率。MgNb_(2)O_(6)-doped(Ba_(0.71)Sr_(0.29))TiO_(3)((Ba,Sr)TiO_(3))-based capacitor ceramics were prepared by solid-state method.The influence of MgNb_(2)O_(6)(MNO)doping amount on the dielectric properties,phase composition,and microstructure of(Ba,Sr)TiO_(3)-based ceramics were investigated by X-ray diffraction(XRD)and scanning electronic microscopy(SEM),among other tests.The results showed that the relativity permittivity of(Ba,Sr)TiO_(3)-based capacitor ceramics decreased;dielectric loss increased,then decreased,and finally increased;the resistivity first decreased,then increased,and finally decreased;and withstand voltage strength(E b)first decreased firstly,then increased,and finally decreased when MNO doping amount increased.When the doping amount of MNO was 2.0 wt%,the(Ba,Sr)TiO_(3)ceramics had a maximum dielectric constant of 1670 and minimum dielectric loss of 0.0056.When the doping amount of MNO was 8.0 wt%,(Ba,Sr)TiO_(3)ceramics had a maximum resistivity of 65.23×10^(10)Ω·cm and maximum withstand voltage strength of 7.7 kV/mm(DC).When the doping amount of MNO was 10.0 wt%,(Ba,Sr)TiO_(3)ceramics exhibited less percentage of capacitance variation with temperatures of+0.18%and-28.29%.(Ba,Sr)TiO_(3)ceramics doped with MNO had a perovskite structure.The doping of MNO can decrease capacitance variation with temperature.

关 键 词：钛酸锶钡 MgNb_(2)O_(6) 介电性能 掺杂 陶瓷 

分 类 号：TN384[电子电信—物理电子学] TQ174.75[化学工程—陶瓷工业]