用共沉淀-熔盐法和溶胶-凝胶法合成的BaFe_8(Ti_(0.5)Mn_(0.5))_4O_(19)铁氧体纳米粒子  

BaFe_8(Ti_(0.5)Mn_(0.5))_4O_(19) Nanoparticles Prepared by Coprecipitation-Fused -Salt and Sol-Gel Method

作　　者：郭亚军[1] 郭亚平 吕君英[1] 谭秀民 

机构地区：[1]哈尔滨工程大学化工学院,黑龙江哈尔滨150001

出　　处：《磁性材料及器件》2005年第1期17-19,共3页Journal of Magnetic Materials and Devices

基　　金：黑龙江省自然科学基金资助项目(A9923);哈尔滨工程大学基础研究基金项目(HEUF04063)

摘　　要：采用共沉淀-熔盐法和溶胶-凝胶法合成了BaFe_8(Ti_(0.5)Mn_(0.5))_4O_(19)铁氧体纳米粒子。借助XRD、TEM和VSM等分析手段研究了不同制备方法对铁氧体纳米粒子的粒径、形貌及磁性能的影响。结果表明,采用溶胶-凝胶法合成的BaFe_8(Ti_(0.5)Mn_(0.5))_4O_(19)纳米晶粒径比共沉淀-熔盐法的均匀,对于相同的焙烧温度,矫顽力比共沉淀-熔盐法的低得多。Ti-Mn-substituted barium ferrite nanoparticles have been prepared by sol-gel method and coprecipitation-fused-salt method. XRD, TEM and VSM have been used to investigate the effect of preparation methods on crystallite size, morphology, surface structure and magnetic properties. The result shows that the crystallite size of BaFe8(Ti0.5Mn0.5)4O19 prepared by sol-gel method is more uniform than that by coprecipitation-fused-salt method. However, its coercivity is much less than that of the Ti-Mn-substituted barium ferrite prepared by coprecipitation-fused-salt method.

关 键 词：M型铁氧体纳米粒子 共沉淀-熔盐法 溶胶-凝胶法 微结构 磁性能 

分 类 号：TQ586.1[化学工程—精细化工] TM277.2[一般工业技术—材料科学与工程]