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La~(3+)掺杂Ca_(1-x)La_xCu_3Ti_4O_(12)陶瓷的制备及性能研究
引用本文:李旺,罗哲,唐鹿,薛飞,郭鹏.La~(3+)掺杂Ca_(1-x)La_xCu_3Ti_4O_(12)陶瓷的制备及性能研究[J].人工晶体学报,2017(9):1735-1739.
作者姓名:李旺  罗哲  唐鹿  薛飞  郭鹏
作者单位:江西科技学院协同创新中心,南昌,330098
基金项目:江西科技学院博士科研启动基金(8100200256),江西省教育厅科学技术研究项目(GJJ151152)
摘    要:采用固相反应法制备了La~(3+)掺杂的Ca_(1-x)La_xCu_3Ti_4O_(12)(CCTO)陶瓷,研究了La~(3+)掺杂量对Ca1-xLaxCu3Ti4O12(x=0%,1%,3%,5%,7%)陶瓷物相结构、微观形貌和介电性能影响,对La~(3+)掺杂影响CCTO陶瓷介电性能的机理进行了分析。结果表明:x为3%时,开始出现杂相;x高于5%时,陶瓷晶粒开始细化;La~(3+)掺杂可以显著提高Ca_(1-x)La_xCu_3Ti_4O_(12)陶瓷的介电常数,同时介电损耗在高频段也相应降低,从而有助于CCTO陶瓷的综合介电性能的提升。

关 键 词:CaCu3Ti4O12  介电性能  掺杂  巨介电陶瓷

Effect of La3 +Doping on the Microstructures and Dielectric Properties of Ca1 -xLaxCu3Ti4O12 Ceramics
LI Wang,LUO Zhe,TANG Lu,XUE Fei,GUO Peng.Effect of La3 +Doping on the Microstructures and Dielectric Properties of Ca1 -xLaxCu3Ti4O12 Ceramics[J].Journal of Synthetic Crystals,2017(9):1735-1739.
Authors:LI Wang  LUO Zhe  TANG Lu  XUE Fei  GUO Peng
Abstract:CaCu3 Ti4 O12 ( CCTO ) ceramics doped by La 3+ were prepared by the solid state reaction method.The phase structures , microstructures, and dielectric properties of the Ca 1-x Lax Cu3 Ti4 O12 ( x=0%, 1%, 3%, 5%, 7%) ceramics were investigated .The mechanism of influence of La 3+doping on the dielectric properties of CCTO ceramics was analyzed .The results show when x is 3%, secondary phases appear , when x is higher than 5%, the ceramic grains become smaller , La3+doping remarkably increases the dielectric constant of CaCu 3 Ti4 O12 ceramics, and the dielectric loss also becomes lower than undoped CaCu 3 Ti4 O12 ceramics over the high frequency range , which improved the general dielectric properties of CCTO ceramics .
Keywords:CaCu3 Ti4 O12  dielectric property  doping  colossal dielectric constant ceramic
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