钇离子钙位掺杂对CaCu_3Ti_4O_(12)陶瓷材料压敏性能的调控  

Regulation on the non-ohmic properties of CaCu_3Ti_4O_(12) ceramics material by yttriumion doping on calcium

作　　者：陈镇平[1] 项会雯 李涛[1] 张雨[1] 陈鑫[1] 孙新科[2] 

机构地区：[1]郑州轻工业学院物理与电子工程学院,河南郑州450002 [2]郑州轻工业学院材料与化学工程学院,河南郑州450001

出　　处：《郑州轻工业学院学报（自然科学版）》2015年第2期6-10,共5页Journal of Zhengzhou University of Light Industry:Natural Science

基　　金：国家自然科学基金项目(11175159);郑州轻工业学院研究生科技创新项目(01015)

摘　　要：采用传统固相反应法制备了 Ca（1- x）Yx Cu3 Ti4 O12（x =0，0.005，0.010，0.015，0.020，0.030，0.040）陶瓷样品.利用 X 射线衍射仪、扫描电子显微镜及高压数字源表等测试手段，对所得样品的微观结构和压敏性能进行了表征，并分析讨论了晶界势垒变化影响体系压敏性能的原因.结果表明，不等价的钇离子（Y3＋）钙位掺杂未引起体系结构相变；体系晶粒生长与掺杂量有明显的关联，掺杂改变了样品的致密度及晶界处的化学环境；Y3＋掺杂对 CaCu3 Ti4 O12陶瓷材料压敏性能有明显的调控作用，适量掺杂 Y3＋（x =0.010~0.020）可显著提高样品的非线性系数和压敏电压.The polycrystalline Ca（1-x）Yx Cu3 Ti4 O12（ x = 0,0. 005,0. 010,0. 015,0. 020,0. 030,0. 040） ceramics samples were prepared by traditional solid-state reaction method. The microstructure and non-ohmic properties were characterized by X-ray diffraction,scanning electron microscope and the high-voltage digital source-meter. The effect mechanism of the variation in grain boundary barrier on the non-ohmic properties was also discussed. The results presented that there was no phase transition in Y3 ＋ -doped CaCu3 Ti4 O12 samples,while the grain growth was related to the doping content. Both the density and chemi-cal environment in grain boundary of samples were influenced by doping. The non-ohmic properties of CaCu3 Ti4 O12 ceramics material were modified by Y3 ＋ doping,and both non-linear coefficient and break-down voltage were apparently enhanced by doping with the appropriate content（x = 0. 010 - 0. 020）.

关 键 词：钇离子钙位掺杂 CaCu3 Ti4 O12陶瓷材料 压敏性能 势垒高度 

分 类 号：O482.4[理学—固体物理]