热处理温度对M型BaFe_(12)O_(19) 铁氧体空心微球结构和静磁特性的影响  

EFFECTS OF HEAT TREATMENT TEMPERATURE ON STRUCTURE AND STATIC MAGNETIC PROPERTIES OF MTYPE BaFe_(12)O_(19) FERRITE HOLLOW MICROSPHERES

作　　者：任平[1] 官建国[1] 王琦[1] 程旭东[1] 陶剑青[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《硅酸盐学报》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

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.

关 键 词：空心微球 钡铁氧体 共沉淀 喷雾热解技术 

分 类 号：TM277[一般工业技术—材料科学与工程]