硅酸盐学报

锶锑双掺杂La₂NiMnO₆陶瓷的相变行为及介电性能（英文）

作者：陈浩李智曹珍珠王丽英刘进荣李彩翎何伟艳

关键词：双掺杂相变电学性能介电性能

分类号：TB34

出版年,卷(期):页码：2014,42(1):51-55

DOI：10.7521/j.issn.0454-5648.2014.01.10

摘要：

采用传统固相法制备了La_2-xSr_xNiMn_1-xSb_xO₆(x＝0, 0.04, 0.08, 0.12)陶瓷。研究了La_2-xSr_xNiMn_1-xSb_xO₆的晶体结构、电学性能和介电性能的变化规律。结果表明：随着Sr、Sb含量的增加，La_2-xSr_xNiMn_1-xSb_xO₆由单斜和菱形混合相逐渐变化成单斜相，交流电导率逐渐降低。锶锑共掺杂降低了La₂NiMnO₆的介电常数和损耗。La_1.96Sr_0.04NiMn_0.96Sb_0.04·O₆的激活能略低于具有混合相结构的La₂NiMnO₆的激活能，但是指前因子比La₂NiMnO₆的低一个数量级。

La_2-xSr_xNiMn_1-xSb_xO₆ceramics were prepared by a conventional solid state route.The microstructures, electrical properties and dielectric properties of La_2-xSr_xNiMn_1-xSb_xO₆were investigated.The results show that a phase transition from monoclinic and rhombohedra mixed phases to single monoclinic phase occurs, and the AC conductivity decreases as Sr and Sb contents both increase.The dielectric constant and the dielectric loss of La₂NiMnO₆decrease due to the Sr-Sb codoping.The activation energie of La_1.96Sr_0.04NiMn_0.96Sb_0.04O₆are slightly lower than those of La₂NiMnO_6,but the pre-exponential factors are one order of magnitude lower than those of La₂NiMnO₆.

基金项目：

国家自然基金 (51102130)；中科院无机功能材料与器件重点实验室项目(KLIFMD-2011-01)；内蒙古工业大学重点基金项目(ZD201107)。

作者简介：

第一作者：陈浩(1988—)，男，硕士研究生。通信作者：曹珍珠(1977—)，男，博士，副教授。 ———————————— Received date：2013-05-31. Revised date：2013-08-30. First author: CHEN Hao (1988-), male, Master candidate. E-mail: chenhaohao89@163.com Correspondent author: CAO Zhenzhu (1977-), male, Ph.D., Associate Professor. E-mail: czz03@163.com

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