Mg和Al共掺杂对CaCu_(3)Ti_(4)O_(12)介电性能的影响  

Influence of Mg and Al co-doping on dielectric properties of CaCu_(3)Ti_(4)O_(12)

作　　者：李秋实 李新 丁茹 琚泽良 刘英洁 王彪[2] 王森 刘高斌 LI Qiushi;LI Xin;DING Ru;JU Zeliang;LIU Yingjie;WANG Biao;WANG Sen;LIU Gaobin(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China;School of Science,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [2]辽宁科技大学理学院,辽宁鞍山114051

出　　处：《辽宁科技大学学报》2023年第1期1-5,共5页Journal of University of Science and Technology Liaoning

基　　金：辽宁省教育厅项目(LNKJ0296);辽宁科技大学大学生创新创业训练计划(x202210146138)。

摘　　要：CaCu_(3)Ti_(4)O_(12)(CCTO)具有较大的介电常数,在储能领域具有巨大的应用潜力,但高介电损耗却限制了其应用。本文采用固态法共掺杂Mg和Al元素,研究Al掺杂量对CCTO的介电常数、介电损耗和阻抗等物理性能的影响。实验结果表明,Mg和Al元素共掺杂,CCTO的晶格常数减小,衍射峰位向高角度偏移;随Al含量的增加,CCTO的介电常数明显减小,而介电损耗随频率、温度的提高先减小后增大,阻抗显著增大;在中低频、低温时,掺杂可有效降低介电损耗。CaCu_(3)Ti_(4)O_(12)(CCTO)has a large dielectric constant,which implies a great potential for application in the capacitor energy storage field.However,the high dielectric loss of CCTO limits its application.In this paper,the solid state method was used to co-dope with Mg and Al.Then the effect of Al doping amount on the dielectric constant,dielectric loss and impedance properties was studied.The results show that the lattice constant of CCTO decreases and the diffraction peak shifts to the right due to the co-doping of Mg and Al.With the increase of Al content,the dielectric constant of CCTO decreases obviously,while the dielectric loss decreases first and then increases with the increase of frequency and temperature,and the impedance increases significantly.The dielectric loss of doped CCTO can be effectively reduced at the range of mid-low frequency and low temperature.

关 键 词：钛酸铜钙 介电常数 介电损耗 共掺杂 

分 类 号：TB332[一般工业技术—材料科学与工程]