摘要
采用溶胶凝胶法（Ｓｏｌ－Ｇｅｌ）制备ＮｉＭｎ２Ｏ４纳米粉体．用Ｘ射线衍射（ＸＲＤ）法，热分析仪研究ＮｉＭｎ２Ｏ４纳米粉体的相变过程．用Ｘ射线衍射线线宽法，透射电子显微镜（ＴＥＭ）研究晶粒长大行为．研究结果表明：热处理温度小于６７０°Ｃ，存在非晶晶化过程和向ＮｉＭｎ２Ｏ４尖晶石主晶相转变等相变过程，晶粒尺寸缓慢增大，热处理温度在于６７０°Ｃ，粉体的相结构为ＮｉＭｎ２Ｏ４尖晶石相．晶粒尺寸较快增长．相变过程严重影响了晶粒长大行为．
NiMn 2O 4 Nano powder was prepared by sol gel method.Change of NiMn 2O 4 Nano powder in phase structure and particle size with temperature was investigated by X ray diffraction,thermal analysis and transmiss electron miscroscopy.It was found that crystallization process and phase transition was observed below 670°C.Phase structure was all spinel type above 670°C.The average particle size of the nano powders increased slowly with temperature up to 670°C,but grew rapidly when the temperature was higher than 670°C.
出处
《新疆大学学报（自然科学版）》
CAS
1998年第2期49-51,共3页
Journal of Xinjiang University(Natural Science Edition)
关键词
NiMn2O4
纳米粉体
相变
半导体
溶胶凝胶法
NiMn 2O 4 nano powder Particle size Crystallization process Phase transition
