Preparation of Rare-earth Permanent Magnetic Strontium Ferrite by Microwave Sintering Process

摘要：

In this paper,the green body was prepared by preroasted material of strontium ferrite,adding 0.2 to 9％ the rare earth additive,by wet milling and forming into pellets Φ30x10 mm under magnetic field. Then,the green body was sintered separately by microwave sintering (MS) method and conventional sintering (CS) technique. The results showed that: the strontium ferrite samples with the same magnetic properties Br and (BH) max were 420 ±10mT and 33.0±2 kJ/m3) were synthesized by microwave sintering (MS) method against conventional sintering method,the sintering temperature and time were reduced 150-300℃and 5~6h. Therefore, microwave sintering method will significantly decrease energy consumption. Further analysis revealed that the major improvements in microwave sintering were the material microstructure,the grain size was significantly reduced. the magnetic domain short-range order was increased so that the degree of orientation was increased,and although the fusion was existed between grains,the grain boundaries did not disappear.

关键词： Microwave sintering Strontium ferrite Permanent magnetic materials

作者: Hanhan Jiang Minglin Jin Zhanyong Wang Qizhong Chen Huichun Qian

作者单位: College of Material Science and Engineering,Shanghai Institute of Technology,Shanghai 200235,China C College of Material Science and Engineering,Shanghai Institute of Technology,Shanghai 200235,China

会议类型: 国际会议

会议名称: Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)

会议地点: 南昌

会议语种:英文

页码: 264-268

在线出版日期: 2010-04-28（万方平台首次上网日期，不代表论文的发表时间）