Effect of Mg Stearate Addition on Magnetic Properties of Ba-System W-Type Ferrite Magnets

摘要：

An experiment was carried out to investigate of the effect of Mg Stearate as a reducing agent on the magnetic and physical properties of anisotropic BaFe2-W type ferrite magnets. It was found that the magnetic properties of BaO-8.5Fe2O3 were improved by adding 0.3 wt％ of Mg Stearate, 0.5 wt％ of SiO2, and 0.5 wt％ of CaO together. The optimum conditions for making magnets were as follows; semisintering condition: 1350 ℃×4.0 h in nitrogen gas atmosphere, drying condition: 180 ℃×2.0 h in air, sintering condition: 1180℃×1.5 h in nitrogen gas atmosphere. Magnetic and physical properties of a typical sample were Jm= 0.48 T, Jr=0.43 T,Hcj=172.2 kA/m, HcB= 162.7 kA/m, (BH)max=33.7 kJ/m3, and Tc= 496℃. The lattice constants of this compound were a=5.875×10-10 m, c=32.47×10-10 m, and c/a=5.527.

关键词： BaFe2-W type hexagonal ferrite magnets Mg Stearate reducing agent SiO2 and CaOadditives magnetic properties

作者: H.Yamamoto K.Suzuki

作者单位: School of Science and Technology,Meiji University 1-1-1 Higashimita Tamaku,Kawasaki 214,Japan

会议类型: 国际会议

会议名称: The 10th International Conference on Ferrites(2008中国国际铁氧体研讨会)

会议地点: 成都

会议语种:英文

页码: 104-107

在线出版日期: 2008-10-10（万方平台首次上网日期，不代表论文的发表时间）