journal article·2013-01-04

Preparation and Characterization of Multiferroics BiFeO3

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

Journal of Inorganic Materials· Volume 27· Issue 10
Publisher page

Abstract

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BiFeO 3 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BiFeO 3 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BiFeO 3 纳米粉体中无杂相Bi 25 FeO 40 和Bi 2 Fe 4 O 9 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·m 2 /kg, 剩余磁化强度 M r =0.13 A·m 2 /kg, 矫顽力 H c =15.76 kA/m.
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Research context

OpenAlex topics: Multiferroics and related materials · Magnetic and transport properties of perovskites and related materials · Ferroelectric and Piezoelectric Materials

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