金属掺杂AgSnO<sub>2</sub>触头材料的仿真与实验

doi:10.19595/j.cnki.1000-6753.tces.200900

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摘要一直以来掺杂改善AgSnO₂触头材料的电性能大多采用“试错”的方法进行实验研究,因此寻求有效的理论支撑具有非常重要的研究意义和应用价值。该文基于密度泛函理论的第一性原理,构建三种金属元素（Sr、Ga、Co）掺杂SnO₂的晶胞模型,仿真研究掺杂后SnO₂的稳定性与相对电导率,得到最佳的掺杂元素Co。通过实验进行验证,首先采用溶胶凝胶法制备掺杂的SnO₂粉末,X射线衍射（XRD）验证了溶胶凝胶法能够实现仿真计算建立的置换掺杂模型,再利用粉末冶金法制备掺杂的AgSnO₂电触头材料,经电性能测试验证了仿真结果的正确性。为筛选掺杂元素改善AgSnO₂触头材料性能提供了理论依据。

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	张颖
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关键词 ：第一性原理, 金属掺杂, AgSnO₂触头材料, 电性能

Abstract：Doping to improve the electrical properties of AgSnO₂ contact materials has always adopted the trial and error method for experimental research. Therefore, it is of great significance and application value to seek effective theoretical method. In this paper, based on the first-principles of density functional theory, the SnO₂ model doped with three metal elements (Sr, Ga, Co) was constructed. The stability and relative conductivity of doped SnO₂ were studied by simulation, and the best doping element Co was obtained. After that, it was verified through experiments. First, the sol-gel method was used to prepare the doped SnO₂ powder, and the XRD verified that the sol-gel method could realize the atomic replacement of model established by the simulation. Then, the doped SnO₂ powder was prepared by the powder metallurgy method. The electrical properties were measured to verify the correctness of the simulation. It provides a theoretical basis for screening elements to improve the performance of AgSnO₂ contact materials.

Key words： First-principles metal-doped AgSnO₂ contact materials electrical properties

收稿日期: 2020-07-20

PACS:

TM501

基金资助:国家自然科学基金资助项目（51777057）

通讯作者: 王景芹, 女,1964年生,教授,博士生导师,研究方向为电器可靠性理论与测试技术。E-mail: jqwang@hebut.edu.cn

作者简介: 张颖，女,1993年生,博士,研究方向为电器可靠性理论与测试技术。E-mail: 13512474229@163.com

引用本文:

张颖, 王景芹, 康慧玲, 胡德霖. 金属掺杂AgSnO₂触头材料的仿真与实验[J]. 电工技术学报, 2021, 36(8): 1587-1595. Zhang Ying, Wang Jingqin, Kang Huiling, Hu Delin. Simulation and Experiment of Metal-Doped AgSnO₂ Contact Material. Transactions of China Electrotechnical Society, 2021, 36(8): 1587-1595.

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