自蔓延高温合成锰锌铁氧体粉料  

Self-propagating high-temperature synthesis of MnZn-ferrite powder

作　　者：杨珂[1] 郭志猛[1] 郝俊杰[1] 高峰[1] 张斌[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《北京科技大学学报》2007年第11期1118-1122,共5页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No20476008)

摘　　要：采用内氧化剂KClO3,在常压空气中自蔓延高温合成锰锌铁氧体粉料.粉料性能用XRD、SEM、VSM等表征,讨论了燃烧合成的影响因素.结果表明:当反应放热供氧系数m为0.54、反应控制放热系数k为0.6、燃烧合成速度为1.93mm·s-1、燃烧温度为1593K时,可制备性能优良的锰锌铁氧体粉料,其比饱和磁化强度为64.44A·m2·kg-1,比剩磁强度为1.349A·m2·kg-1,矫顽力为0.24kA·m-1,平均粒径为1.42μm.Using KClO3 as inner oxidant, MnZn-ferrite powder was synthesized by a self-propagating high-temperature synthesis （SHS） process in normal air atmosphere. The properties of the powder were investigated by XRD, SEM and VSM. The effects of combustion synthesis parameters were also analyzed. The results show that, with the Fe value k = 0.6 and the inner oxidant value m = 0.43 the combustion velocity is 1.93 mm ·s^-1, and the highest combustion temperature is 1593 K. The powder possesses good magnetic properties, σs = 64.44A·m^2·kg^-1,σr = 1. 349 A·m^2·kg^-1, Hc = 0.24 kA·m^-1, and the mean particle diameter is 1.42 μm.

关 键 词：锰锌铁氧体 氧化剂 自蔓延高温合成 磁性能 

分 类 号：TQ174.5[化学工程—陶瓷工业]