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[1]刘建武,郭成,黄海亮,等.柠檬酸溶胶-凝胶法制备钡铁氧体晶相变化的研究[J].南京工业大学学报(自然科学版),2017,39(01):26-30.[doi:10.3969/j.issn.1671-7627.2017.01.005]
 LIU Jianwu,GUO Cheng,HUANG Hailiang,et al.Crystal change of barium hexaferrite prepared by citric acid sol-gel method[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2017,39(01):26-30.[doi:10.3969/j.issn.1671-7627.2017.01.005]
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柠檬酸溶胶-凝胶法制备钡铁氧体晶相变化的研究()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
39
期数:
2017年01期
页码:
26-30
栏目:
出版日期:
2017-01-21

文章信息/Info

Title:
Crystal change of barium hexaferrite prepared by citric acid sol-gel method
文章编号:
1671-7627(2017)01-0026-05
作者:
刘建武12郭成1黄海亮2严生虎2沈介发2张跃2
1.南京工业大学 化学与分子工程学院,江苏 南京 211800; 2.常州大学 制药与生命科学学院,江苏 常州 213164
Author(s):
LIU Jianwu12GUO Cheng1HUANG Hailiang2YAN Shenghu2SHEN Jiefa2ZHANG Yue2
1. College of Chemistry and Molecular Engineering,Nanjing Tech University,Nanjing 211800,China; 2. College of Life Science and Pharmacy,Changzhou University,Changzhou 213164,China
关键词:
W型钡铁氧体 n(CA)/n(MN) γ-Fe2O3 α-Fe2O3
Keywords:
W-type Ferrite n(CA)/n(MN) γ-Fe2O3 α-Fe2O3
分类号:
TM277
DOI:
10.3969/j.issn.1671-7627.2017.01.005
文献标志码:
A
摘要:
采用柠檬酸溶胶-凝胶法制得钡铁氧体磁性粉末,借助热质量分析(TGA)、红外光谱(FT-IR)、X线衍射(XRD)及扫描电镜(SEM)测试手段研究了不同柠檬酸添加量对煅烧产物晶型的影响。结果表明:当柠檬酸与金属硝酸盐摩尔配比n(CA)/n(MN)≤1.2时,钡铁氧体晶相为W型,当n(CA)/n(MN)=2时,晶相转变为M型; 随着柠檬酸量的增加,燃烧产物的晶化温度升高; 过量柠檬酸添加改变了中间产物Fe的存在形式,促使γ-Fe2O3转化为热稳定性好的α-Fe2O3,进而使得W型钡铁氧体的成型温度升高,出现M晶型钡铁氧体。
Abstract:
Barium hexaferrite was synthesized by citric acid sol-gel process.The thermo gravimetric analysis(TGA),Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD)and scanning electron microscopy(SEM)were used to characterize the crystal phase of calcination products with different citric acid additives.Results revealed that the crystal phase of barium hexaferrite was W-type when the value of n(CA)/n(MN)≤1.2,and if n(CA)/n(MN)=2,the crystal phase would change into M-type.With the increase of citric acid,the crystallization temperature of the product would rise.The excessive citric acid additive changed the existing form of Fe,which promoted the transformation from γ-Fe2O3 to α-Fe2O3,which was more stable with the increase of formation temperature of the W-type barium hexaferrite,and the appearing of M-type.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-11-06
作者简介:刘建武(1973—),男,新疆石河子人,博士,主要研究方向为化学工程、新材料的理论与应用; 郭成(联系人),教授,E-mail:guocheng@njtech.edu.cn.
引用本文:刘建武,郭成,黄海亮,等.柠檬酸溶胶-凝胶法制备钡铁氧体晶相变化的研究[J].南京工业大学学报(自然科学版),2017,39(1):26-31..
更新日期/Last Update: 2017-01-15