高恒蛟,陈秀娟,封小鹏,高君玲

• 1:甘肃省有色金属新材料省部共建国家重点实验室
• 2:兰州理工大学机电工程学院

摘要(Abstract)：

采用燃烧合成-热处理工艺制备热电材料β-FeSi2,研究了Cu掺杂和不同的硅含量对β-FeSi2相变的影响。利用X射线衍射仪和扫描电子显微镜分析了合成的铁硅间化合物的相组成及其微观形貌。结果表明:掺杂0.5 at%的Cu在热处理过程中能提高共析反应(α→β+Si)的反应进程,完全地将α-Fe2Si5转变为β-FeSi2,形成P型半导体。在混料阶段按Fe∶Si=1∶3的原子比例制备β-FeSi2,XRD分析表明,过量的Si单质提高了Si+ε→β的相转变过程,很大程度上能够消除ε相,增加β-FeSi2的含量。

关键词(KeyWords)： 热处理工艺;Cu掺杂;硅含量;β-FeSi2;相转变

Abstract:

Keywords:

基金项目(Foundation): 甘肃省自然科学基金项目(1014RJ2A010)

作者(Author): 高恒蛟,陈秀娟,封小鹏,高君玲

DOI: 10.13289/j.issn.1009-6264.2011.05.005

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