| 溶胶-凝胶自燃烧法制备Ba(NiMg)0.2AlxFe11.4-xO19的结构与磁性能 |
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| 引用本文： | 常靖宇,孔迪,马振振,刘先松,李明玲. 溶胶-凝胶自燃烧法制备Ba(NiMg)0.2AlxFe11.4-xO19的结构与磁性能[J]. 人工晶体学报, 2017, 46(9): 1786-1790 |
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| 作者姓名： | 常靖宇 孔迪 马振振 刘先松 李明玲 |
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| 作者单位： | 巢湖学院化学与材料工程学院,合肥,238000;安徽大学物理与材料科学学院,合肥,230601;巢湖学院化学与材料工程学院,合肥 238000;安徽大学物理与材料科学学院,合肥 230601;巢湖学院新型功能材料与精细化学品研究所,合肥 238000 |
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| 基金项目： | 2016年度国家级大学生创新创业训练计划项目(201610380018)，安徽高校自然科学研究项目(KJ2017A447) |
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| 摘 要： | 以柠檬酸为络合剂,利用溶胶-凝胶自燃烧法制备了Ni、Mg、Al掺杂的M型钡铁氧体粉体(Ba(NiMg)0.2AlxFe11.4-xO19,x=0~0.4),利用X射线衍射仪、透射电子显微镜、综合物性测量系统等对样品结构与室温磁性能进行研究.结果表明,样品的物相组成与Al掺杂量有密切关系,当Al掺杂量x超过0.2时,产物中出现杂相α-Fe2O3,且杂相α-Fe2O3的含量随x值的增大而增加.在10kOe的外加磁场下,样品的饱和磁化强度(Ms)随x值的增大而降低,矫顽力(Hc)则随x值的增大先增大后减小,当x=0.2时,矫顽力达到最大值5644Oe,对应的饱和磁化强度为46emu/g.
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| 关 键 词： | 钡铁氧体 溶胶-凝胶自燃烧法 离子掺杂 晶体结构 磁性能, |
Structure and Magnetic Properties of Ba(NiMg)0.2AlxFe11.4-xO19 Prepared by Sol-gel Auto-combustion Method |
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| CHANG Jing-yu,KONG Di,MA Zhen-zhen,LIU Xian-song,LI Ming-ling. Structure and Magnetic Properties of Ba(NiMg)0.2AlxFe11.4-xO19 Prepared by Sol-gel Auto-combustion Method[J]. Journal of Synthetic Crystals, 2017, 46(9): 1786-1790 |
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| Authors: | CHANG Jing-yu KONG Di MA Zhen-zhen LIU Xian-song LI Ming-ling |
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| Abstract: | The Ni, Mg, Al co-doped M-type barium ferrite powders (Ba(NiMg)0.2AlxFe11.4-xO19, x=0-0.4 ) were prepared via a sol-gel auto-combustion method using citric acid as complexing agent .The structure and room-temperature magnetic properties of the as-samples were studied by X-ray diffraction ( XRD) , transmission electron microscope ( TEM) and physical property measurement system ( PPMS) . The results show that the phase constitutent of the samples is closely related to the amount of Al doping . When the x value exceeds 0.2, the impurity alpha-Fe2O3 appears in the products, and the content of alpha-Fe2 O3 increases with the increase of the amount of Al substitution .The saturation magnetization (10 kOe) decreases with the increase of x value, while the coercivity (Hc) value increases first and then decreases with the increase of x value, and the coercivity reaches the maximum value of 5644 Oe at x=0.2, corresponding to the saturation magnetization of 46 emu/g. |
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| Keywords: | barium ferrite sol-gel auto-combustion method ions doping crystal structure magnetic property |
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