多铁材料BiFeO3的制备与表征

doi:10.3724/SP.J.1077.2012.11741

无机材料学报 ›› 2012, Vol. 27 ›› Issue (10): 1053-1057.DOI: 10.3724/SP.J.1077.2012.11741 CSTR: 32189.14.SP.J.1077.2012.11741

多铁材料BiFeO₃的制备与表征

宋伟^1,2,3, 王暄^1,2,3, 张冬^1,2,3, 孙志1,2,3, 韩柏^1,2,3, 何丽娟^2,3, 雷清泉^1,2,3

(1. 哈尔滨理工大学电气与电子工程学院,哈尔滨150080; 2. 工程电介质及其应用技术教育部重点实验室, 哈尔滨150080; 3. 黑龙江省电介质工程重点实验室, 哈尔滨150080)

收稿日期:2011-11-30 修回日期:2012-02-11 出版日期:2012-10-20 网络出版日期:2012-09-17
作者简介:宋伟(1979-), 女, 博士研究生. E-mail: sw7912@hrbust.edu.cn
基金资助:
国家重点基础研究发展计划(973计划) (2009CB724505, 2012CB723308); 国家自然科学基金(5097702)

Preparation and Characterization of Multiferroics BiFeO₃

SONG Wei^1,2,3, WANG Xuan^1,2,3, ZHANG Dong^1,2,3, SUN Zhi^1,2,3, HAN Bai^1,2,3, HE Li-Juan^2,3, LEI Qing-Quan^1,2,3

(1. College of Electrical & Electronic Engineer, Harbin University of Science and Technology, Harbin 150080, China; 2. Key Laboratory of Engineering Dielectric and Its Application, Ministry of Education, Harbin 150080, China; 3. Heilongjiang Provincial Key Laboratory of Dielectrics Engineering, Harbin 150080, China)

Received:2011-11-30 Revised:2012-02-11 Published:2012-10-20 Online:2012-09-17
About author:SONG Wei. E-mail: sw7912@hrbust.edu.cn
Supported by:
National Basic Research Program of China (973 Program) (2009CB724505, 2012CB723308); National Natural Science Foundation of China(5097702)

摘要/Abstract

摘要： 以硝酸铁和硝酸铋为反应物, 柠檬酸为络合剂, 硝酸为催化剂, 采用柠檬酸溶胶–凝胶法制备粒径分布均匀的多铁性材料BiFeO₃纳米粉体, 通过TG-DSC、XRD、FT-IR、SEM及AFM等手段对样品的结构、形貌及纯净度进行表征. 研究结果表明, 在溶胶过程中前驱液的pH值以及干凝胶的煅烧温度等合成条件对BiFeO₃纳米粉体的制备和纯净程度都有一定的影响, 最佳的合成条件是前驱溶液的pH=7~8, 干凝胶的煅烧温度为600℃. 在该条件下得到的BiFeO₃纳米粉体中无杂相Bi₂₅FeO₄₀和Bi₂Fe₄O₉等, 纳米颗粒尺寸在100 nm左右, 分散性良好, 饱和磁化强度M_s=1.08 A·m²/kg, 剩余磁化强度M_r=0.13 A·m²/kg, 矫顽力H_c=15.76 kA/m.

关键词: 多铁性材料, 铁酸铋, 溶胶–凝胶, 纳米粉体

Abstract: The multiferroic materials BiFeO₃ nanopowders of dispersion uniformity were synthesized by the citric acid Sol-Gel method, using the iron(Ⅲ) nitrate and bismuth nitrate as the reactants and dilute nitric acid as the catalyst. The physical and chemical characteristics, such as structure, morphology and purity of BiFeO₃nanopowders were investigated by TG-DSC, XRD, FT-IR, SEM and AFM, respectively. The results indicate that the preparation and purity of BiFeO₃ nanopowders have a profound influence on the precursor solution pH value of sol process and the calcined temperature of the xerogel. The optimum reaction conditions are the precursor solution pH=7–8 and calcined temperature of 600℃. It is found that BiFeO₃ nanopowders with 100 nm in size, good dispersion and without Bi₂₅FeO₄₀and Bi₂Fe₄O₉ impurity phase are synthesized under the optimum reaction conditions. The saturation magnetization (Ms), the remanent magnetization (Mr) and the coercivity (Hc) of BiFeO₃ nanopowders under the optimum reaction conditions are 1.08 A·m²/kg, 0.13 A·m²/kg and 15.76 kA/m, respectively.

Key words: multiferroics, BiFeO₃, Sol-Gel, nanopowders

中图分类号:

TQ174

宋伟, 王暄, 张冬, 孙志, 韩柏, 何丽娟, 雷清泉. 多铁材料BiFeO₃的制备与表征[J]. 无机材料学报, 2012, 27(10): 1053-1057.

SONG Wei, WANG Xuan, ZHANG Dong, SUN Zhi, HAN Bai, HE Li-Juan, LEI Qing-Quan. Preparation and Characterization of Multiferroics BiFeO₃[J]. Journal of Inorganic Materials, 2012, 27(10): 1053-1057.

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多铁材料BiFeO₃的制备与表征

Preparation and Characterization of Multiferroics BiFeO₃

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