| 低热固相–溶胶凝胶法制备钴铁氧体的研究 |
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| 引用本文： | 席国喜,张超,乔袆,许会道.低热固相–溶胶凝胶法制备钴铁氧体的研究[J].电子元件与材料,2010,29(11). |
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| 作者姓名： | 席国喜 张超 乔袆 许会道 |
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| 作者单位： | 河南师范大学化学与环境科学学院河南省环境污染控制重点实验室;北京科技大学新金属材料国家重点实验室; |
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| 基金项目： | 河南省重点科技攻关项目 |
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| 摘 要： | 为了改善CoFe2O4的磁性能,以柠檬酸、硝酸钴、硝酸铁为原料,用低热固相反应与sol-gel法相结合,制备了CoFe2O4晶体(样品)。借助于热分析、XRD、SEM和振动样品磁强计(VSM)等测试手段,考察了低热固相反应过程、煅烧温度和煅烧时间对样品结构及磁性能的影响。结果表明:在700℃煅烧2.0 h所得样品的平均晶粒径小(34.17 nm),分散均匀,磁性能好,其饱和磁化强度Ms为75.83 A.m2/kg,矫顽力Hc为127.201 kA/m。
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| 关 键 词： | 低热固相反应 sol-gel法 钴铁氧体 结构 磁性能 |
Preparation of CoFe2O4 crystal by low-heating solid-state reaction integrated with sol-gel method |
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| XI Guoxi,ZHANG Chao,QIAO Yi,XU Huidao.Preparation of CoFe2O4 crystal by low-heating solid-state reaction integrated with sol-gel method[J].Electronic Components & Materials,2010,29(11). |
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| Authors: | XI Guoxi ZHANG Chao QIAO Yi XU Huidao |
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| Affiliation: | XI Guoxi1,ZHANG Chao1,QIAO Yi2,XU Huidao1(1.The Key Laboratory for Environmental Pollution Control of Henan,Chemistry and Environment Science College of Henan Normal University,Xinxiang 453007,Henan Province,China,2.State Key Laboratory for Advanced Metals and Materials,Beijing University of Science and Technology,Beijing 100083,China) |
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| Abstract: | In order to improve magnetic properties of the CoFe2O4,CoFe2O4 crystal(sample) was prepared by low-heating solid-state reaction integrated with sol-gel method using citric acid,cobalt nitrate and ferric nitrate as raw materials.The process of low-heating solid-state reaction and the effects of the calcination temperature and calcination time on the structure and magnetic property of samples were explored and studied by TGA-DSC,XRD,VSM and SEM.The results show that,obtained samples calcined at 700 ℃ for 2.0 h possess good dispersity,and average grain size of 34.17 nm.And their saturation magnetization and the coercivity are 75.83A.m2/kg and 127.201 kA/m,respectively. |
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| Keywords: | low-heating solid-state reaction sol-gel method cobalt ferrite structure magnetic property |
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