| 化学组分和热处理温度对CoFe_2O_4纳米颗粒的磁性能影响 |
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| 引用本文： | 曹世贺,王军.化学组分和热处理温度对CoFe_2O_4纳米颗粒的磁性能影响[J].宁波大学学报(理工版),2011,24(3):100-103. |
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| 作者姓名： | 曹世贺 王军 |
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| 作者单位： | 宁波大学理学院,浙江宁波,315211 |
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| 基金项目： | 国家自然科学基金(10874095) |
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| 摘 要： | 采用化学共沉淀法和热处理过程制备CoFe2O4纳米颗粒.研究了Co化学组分与热处理温度对纳米粒子相结构、穆斯堡尔谱与磁性的影响.结果表明：随Co组分的增加和热处理温度的升高,纳米粒径逐渐变大;在平均粒径为11nm样品中,超顺磁性颗粒与亚铁磁性颗粒的比例为0.16;热处理对Fe3＋离子分布有较大影响;随粒径尺寸的增大,其矫顽力和饱和磁化强度均增大.
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| 关 键 词： | CoFe2O4纳米颗粒 Co组分 穆斯堡尔谱 |
Influence of Chemical Composition and Calcination Temperature on Magnetic Properties of CoFe_2O_4 Nanoparticles |
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| CAO Shi-he,WANG Jun.Influence of Chemical Composition and Calcination Temperature on Magnetic Properties of CoFe_2O_4 Nanoparticles[J].Journal of Ningbo University(Natural Science and Engineering Edition),2011,24(3):100-103. |
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| Authors: | CAO Shi-he WANG Jun |
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| Institution: | CAO Shi-he,WANG Jun * ( Faculty of Science,Ningbo University,Ningbo 315211,China ) |
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| Abstract: | CoFe2O4 nanoparticles are prepared by chemical coprecipitation and subsequent heat treatment approach. The influence of Co composition and calcination temperature on phasestructure, M ssbauer Spectra and Magnetic Properties of CoFe2O4 Nanoparticles is investigated. The results show that lager Co composition and higher calcination temperatures result in bigger mean crystallite size. The ratio of the superparamagnetic and ferrimagnetic fractions of samplehat with average grain size 11nm is estimated at 0.16. ... |
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| Keywords: | CoFe2O4 nanoparticles Co composition M ssbauer spectra |
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