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CrB2的高温高压合成与物性研究

DOI: 10.11858/gywlxb.2014.04.002, PP. 394-398

Keywords: 高温高压,CrB2,X射线衍射,硬度

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Abstract:

采用高温高压手段,以单质硼粉和铬粉为原料,在压力为6GPa、温度为1200℃的条件下成功制备出CrB2化合物。利用X射线衍射仪、X射线能谱仪、硬度检测仪和扫描电子显微镜,对合成产物进行了物性表征。结果表明:合成的CrB2固体为六方结构,空间群为P6/mmm,晶格常数a=0.297nm,b=0.307nm;合成样品的晶粒直径为5~40μm,结晶质量良好。硬度测试结果显示,高温高压合成的CrB2具有很高的硬度。对比实验条件和实验结果发现,温度和原料配比均影响CrB2的合成,提高原料中硼的比例有助于目标产物CrB2的形成。

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