摘要
采用共沉淀火焰喷雾工艺合成了M型BaFe12O19铁氧体空心微球。用热重差热,X射线衍射和扫描电子显微镜表征了产物的结构,并用振动样品磁强计测量了它的静磁性能。结果表明:当热处理温度为800～1100℃,保温3h时,能形成单相M型铁氧体空心微球。随着热处理温度的升高,晶体结构越完整,饱和磁化强度增大,矫顽力减小。
BaFe12O19 ferrites hollow microspheres were prepared by co-precipitation-flame spraying followed by heat treatment process. The structure of samples was characterized by thermo-gravimetric analysis-differential scanning calorimeter (TG-DSC), X-ray diffraction (XRD), scanning electron microscope (SEM). The static magnetic properties of hollow microspheres were measured using a vibrating sample magnetometer (VSM). Results show that the single phase M-type ferrite hollow microspheres are formed after heat treated at the temperatures of 800-1100°C for 3 h. With the increase of heat treatment temperatures, the crystal structure becomes more perfect, whereas the saturation magnetization is increased and the coercive force is decreased.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2005年第1期69-72,共4页
Journal of The Chinese Ceramic Society
基金
国家"863"高新技术(2001AA339020和2002AA305302)
教育部优秀青年教师(2002[350])资助项目
关键词
空心微球
钡铁氧体
共沉淀
喷雾热解技术
Barium compounds
Coercive force
Crystal structure
Differential scanning calorimetry
Flame spraying
Heat treatment
Magnetic properties
Magnetization
Magnetometers
Precipitation (meteorology)
Pyrolysis
Scanning electron microscopy
Thermogravimetric analysis
X ray diffraction
