【摘要】 将溶胶凝胶法和自蔓延燃烧法相结合，开发了一种ｓｏｌｇｅｌ 自燃烧超细粉末合成技术， 并合成了ＮｉＺｎ 铁氧体纳米粉末．结果表明， 由硝酸盐和柠檬酸形成的凝胶具有自蔓延燃烧特性，燃烧后直接形成粒度为４０ ～５０ｎｍ 、具有尖晶石结构的单相ＮｉＺｎ 铁氧体超细粉末．借助ＤＴＡＴＧ 和红外吸收光谱研究了凝胶的燃烧和析晶过程，利用ＸＲＤ、ＴＥＭ 和Ｍ¨ｏｓｓｂａｕｅｒ 谱对合成的粉末进行了表征更多还原

【Abstract】 Nanometer Ni Zn ferrite powders were synthesized by a novel sol gel auto combustion method. The gels, transformed from the aqueous solutions of metal nitrate and citric acid, undergo a self propagating combustion process when being ignited and yield voluminous ashes. These ashes are single phase spinel Ni Zn ferrite powders with particle size of 40～50nm. The redox behavior and crystallization process of the dried gels were studied by DTA TG technique and IR spectra. The synthesized powders were characterized in terms of XRD, TEM and Mssbauer spectrum techniques.更多还原