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熔盐法合成铁酸铋粉体及其磁性能

DOI: 10.7521/j.issn.0454-5648.2014.04.09

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Abstract:

以氧化铋、三氧化二铁、氯化钾和溴化钾为原料,采用熔盐法成功地合成了单晶铁酸铋粉体。通过X射线衍射仪、场发射扫描电子显微镜、透射电子显微镜、Fourier变换红外--Raman光谱仪研究了材料物相、微观结构与制备条件关系,通过MPMSXL5型磁性测量仪测试样品磁性能。结果表明当采用KCl-KBr熔盐,控制熔盐与原料质量比为1.0,750~800℃范围内可以得到单晶斜方六面体BiFeO3粉体,其晶粒尺寸约为0.6μm。基于模板形成机制,探讨了KCl-KBr熔盐合成BiFeO3机理。室温下,采用KCl-KBr熔盐、750℃煅烧2h的BiFeO3粉体显示了弱铁磁性能。

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