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甘氨盐燃烧法制备BaFe12O19纳米粉末的研究

发表时间:2008-07-31  浏览量:1413  下载量:479
全部作者: 解育娟,张学斌,凤仪,陈淑娴,李庶
作者单位: 合肥工业大学材料科学与工程学院
摘 要: 以Fe(NO3)3·9H2O,Ba(CH3COO)2和C2H5NO2为原料,采用甘氨酸盐自蔓延燃烧法(self-propagation high-temperature synthesis, SHS)成功制备了BaFe12O19纳米粉末。借助X射线衍射(X-ray diffraction, XRD)、透射电子显微镜(transmission electron microscope, TEM)和扫描电子显微镜(scanning electron microscope, SEM)等测试方法,研究了不同甘氨酸与金属盐摩尔比(G∶M)以及煅烧温度对合成产物相组成和颗粒形貌的影响。结果表明:反应物G∶M为3∶1时自蔓延燃烧时间最长,原因在于此时甘氨酸与金属盐间络合效应最强。600℃煅烧开始出现BaFe12O19相,但仍有Fe2O3和BaFe2O4杂相存在;随着温度升高,Fe2O3和BaFe2O4进一步反应生成BaFe12O19,BaFe12O19颗粒逐渐长大;在800℃煅烧1 h产物为单相BaFe12O19,颗粒呈六角片状结构,粒径约为40~50 nm.
关 键 词: 无机非金属材料;甘氨酸;自蔓延燃烧法;BaFe12O19;纳米颗粒
Title: The synthesis of BaFe12O19 nano-powders obtained by glycinate
Author: XIE Yujuan, ZHANG Xuebin, FENG Yi, CHEN Shuxian, LI Shu
Organization: School of Material Science and Engineering, Hefei University of Technology
Abstract: BaFe12O19 nanoparticles were successfully synthesized by the self-propagating high-temperature synthesis technique (SHS), based on sol-gel method, using iron nitrate, Fe(NO3)3·9H2O, barium acetate, Ba(CH3COO)2, and glycine, C2H5NO2. The morphology, crystalline structure of the barium ferrite particles were determined by means of XRD, TEM and SEM. It was shown that the calcinations temperature and the molar ratio of glycine to the total metal salt (G∶M) influenced significantly the formation of barium hexaferrite. The combustion time of the glycinate gel reaches the peak when G∶M is 3∶1, which is caused by the strongest interaction between glycine and metal salts. BaFe12O19 phase begins to appear when calcined at 600℃, but impurities Fe2O3 and BaFe2O4 still exist. With the increase of calcine temperature, the grain size of BaFe12O19 particles increases since the further reaction between Fe2O3 and BaFe2O4. The single phase barium hexaferrite powders can be obtained after the precursors are calcined at temperature 800℃. The average grain size of BaFe12O19 is 40~50 nm.
Key words: non-metallic inorganic material; glycine; self-propagating high-temperature synthesie; BaFe12O19; nanoparticle
发表期数: 2008年11月第14期
引用格式: 解育娟,张学斌,凤仪,等. 甘氨盐燃烧法制备BaFe12O19纳米粉末的研究[J]. 中国科技论文在线精品论文,2008,1(14):1606-1610.
 
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