熔盐合成BaFe12O19六角铁氧体及磁性能研究

doi:10.3724/SP.J.1077.2011.00792

无机材料学报 ›› 2011, Vol. 26 ›› Issue (8): 792-796.DOI: 10.3724/SP.J.1077.2011.00792 CSTR: 32189.14.SP.J.1077.2011.00792

熔盐合成BaFe₁₂O₁₉六角铁氧体及磁性能研究

栗海峰¹, 龚荣洲², 卢秀芳¹, 余伟¹, 王鲜², 范力仁¹, 何岗¹

(1. 中国地质大学(武汉) 材料科学与化学工程学院, 武汉430074; 2. 华中科技大学电子科学与技术系, 武汉430074)

收稿日期:2010-10-20 修回日期:2010-12-20 出版日期:2011-08-20 网络出版日期:2011-07-14
作者简介:栗海峰(1970-), 男, 博士, 副教授. E-mail:lhfcug@yahoo.com.cn
基金资助:
国家自然科学基金(50972135); 湖北省耐火材料与高温陶瓷重点实验室-省部共建国家重点实验室培育基地开放基金(G201003)

Molten Salt Synthesis and Magnetic Properties of BaFe₁₂O₁₉ Hexaferrite

LI Hai-Feng¹, GONG Rong-Zhou², LU Xiu-Fang¹, YU Wei1, WANG Xian², FAN Li-Ren¹, He Gang¹

(1. Faculty of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, China; 2. Department of Electronic Science & Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

Received:2010-10-20 Revised:2010-12-20 Published:2011-08-20 Online:2011-07-14
Supported by:
National Natural Science Foundation of China (50972135); The Hubei Province Key Laboratory of Refractories and Ceramics Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory (G201003)

摘要/Abstract

摘要： 以Fe₂O₃、BaCO₃为原料, 采用熔盐法合成了BaFe₁₂O₁₉(BaM)六角铁氧体, 研究了煅烧温度、反应时间、熔盐添加量R及Fe³⁺/Ba²⁺摩尔比对产物物相、显微结构及磁性能的影响. 结果表明, 熔盐合成BaM的反应温度低于 750℃, 中间产物为BaFe₂O₄及BaFe₄O₇. Fe³⁺/Ba²⁺摩尔比在10~11.5可得BaM单相. 熔盐添加量R为1~3时, 所制BaM颗粒为规则六角片状. Fe³⁺/Ba²⁺摩尔比为11.5, 煅烧温度为1000℃时制得的BaM的比饱和磁化强度为71.9A·m²/kg, 接近其理论值72A·m²/kg.

关键词: 熔盐合成, BaFe₁₂O₁₉, 六角铁氧体, 磁性能

Abstract: Barium ferrite BaFe₁₂O₁₉ (BaM) powders were prepared by using molten salt method. The preparation conditions of samples were investigated in detail, such as annealing temperature, soaking time, molten salt additive amount and Fe³⁺/Ba²⁺ molar ratios. The phase composition, microstructure and magnetic properties of the resultant powders were measured respectively by X-Ray Diffractometer (XRD), Scanning Electron Microscope (SEM) and Vibrating Sample Magnetometer (VSM). Formation of BaM started below 750℃ in 0.5NaCl+0.5KCl. Single phase BaM powders were obtained while the Fe³⁺/Ba²⁺ molar ratios was controlled in the range from 10 to 11.5. The SEM results showed that the grains were regular hexagonal platelets when molten salt additive amount R was controlled in the range from 1 to 3. The resultant powders achieved under condition of Fe³⁺/Ba²⁺ molar ratios of 11.5 and calcination temperature of 1000℃ showed the saturation magnetization up to 71.9A·m²/kg, which was quite close to the theoretical value of 72A·m²/kg.

Key words: molten salt synthesis, BaFe₁₂O₁₉, hexaferrite, magnetic property

中图分类号:

O482

栗海峰, 龚荣洲, 卢秀芳, 余伟, 王鲜, 范力仁, 何岗. 熔盐合成BaFe₁₂O₁₉六角铁氧体及磁性能研究[J]. 无机材料学报, 2011, 26(8): 792-796.

LI Hai-Feng, GONG Rong-Zhou, LU Xiu-Fang, YU Wei, WANG Xian, FAN Li-Ren1, He Gang. Molten Salt Synthesis and Magnetic Properties of BaFe₁₂O₁₉ Hexaferrite[J]. Journal of Inorganic Materials, 2011, 26(8): 792-796.

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熔盐合成BaFe₁₂O₁₉六角铁氧体及磁性能研究

Molten Salt Synthesis and Magnetic Properties of BaFe₁₂O₁₉ Hexaferrite

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