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熔盐法合成铁酸铋粉体及其磁性能
作者:钱潜1 刘银1 马立云2 甘治平2 陈晨1 汤永康1 焦宝祥3 侯贵华3 
单位:1.安徽理工大学材料科学与工程学院 安徽淮南232001  2.中国建材国际工程集团有限公司蚌埠玻璃工业设计研究院  
关键词:熔盐法 铁酸铋 磁性能 
分类号:TQ174
出版年,卷(期):页码:2014,42(4):471-475
DOI:10.7521/j.issn.0454-5648.2014.04.09
摘要:

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KCl­KBr熔盐,控制熔盐与原料质量比为1.0750800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KCl­KBr熔盐合成BiFeO3机理。室温下,采用KCl­KBr熔盐、750煅烧2hBiFeO3粉体显示了弱铁磁性能。

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 The single-crystalline BiFeO3 powder was synthesized by a molten salt method using bismuth oxide, ferric oxide, potassium chloride and potassium bromide as raw materials. The phase and microstructure of the as-prepared samples under different preparation conditions were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and Raman spectroscopy, respectively. The magnetic property of the sample was examined by a magnetic property measurement system. The results show that the single crystalline rhombohedral BiFeO3 powder can be obtained by using molten salt (KCl-KBr) at 750-800 for 2h as a ratio of molten salt and raw materials is 1.0. The average particle size of the BiFeO3 powder is 0.6μm. The formation mechanism of BiFeO3 synthesized by the molten salt method was discussed based on the template formation mechanism. The single-crystalline BiFeO3 powder calcined at 750 for 2h with molten salt (KCl-KBr) shows a weak ferrimagnetic behavior at applied magnetic fields..

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基金项目:
安徽省自然基金(1208085ME84);教育部留学回国人员科研启动基金;安徽省高校自然科学研究重点项目(KJ2013A091);江苏省新型环保重点实验室开放课题(AE201307)。
作者简介:
第一作者:钱 潜(1987—), 男,硕士生。E-mail: qian1987up@126.com 通信作者:刘 银(1975—), 男,副教授。E-mail: yinliu@aust.edu.cn
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