(1. 山东大学 材料液态结构及其遗传性教育部重点实验室，济南 260061；
2. 山东交通学院 土木工程系，济南 250023)
摘 要: 以化学计量比的硝酸钡、硝酸铁和柠檬酸为原料采用溶胶−凝胶工艺制备M型钡铁氧体纳米粉体，通过XRD、TEM等测试手段表征粉体的结晶特性及微观结构，并研究反应机理以及烧结温度、保温时间对晶粒尺寸的影响，结果表明：粉体的平均晶粒尺寸为40~70 nm，烧结温度显著影响结晶过程、晶粒尺寸及其分布；烧结温度为
关键字: M型钡铁氧体；溶胶−凝胶工艺；结晶特性；烧结
barium ferrite nanopowder by sol-gel process
（1. Key Laboratory of Liquid Structure and Heredity of Materials,
Ministry of Education, Shandong University, Ji’nan 250061, China;
2. Department of Civil Engineering, Shandong Jiaotong University,Ji’nan 250023, China）
Abstract:M-type barium ferrite (BaFe12O19) nanopowders were synthesized by a sol-gel process. The crystalline properties and morphologies of the powders were characterized by means of X-ray diffraction (XRD) and transmission electron microscope (TEM). The reaction mechanism and the effects of calcinations temperature and calcinations time on grain size were studied. The results show that M-type barium ferrite powders with the average grain size range of 40−70 nm can be prepared at 800 ℃ and the calcinations temperature has obvious influence on crystalline process, the particle size and its distribution. The as-prepared samples obtained after heat-treatment at 800 ℃ for 0.5 h exhibit that the rod-like particles have a length of about 150−200 nm and a diameter of about 30−50 nm.
Key words: M-type barium ferrite; sol-gel process; crystalline property; calcinations
