バインダー用ゴムを用いた異方性磁性粉末の圧延加工

概要

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A magnetic composite material is fabricated by rolling. Anisotropic strontium ferrite powder, Zn-22Al superplastic powder and synthetic rubber are mixed with various mixing ratio and then kneaded. The kneaded compact is rolled at temparature ranging from 50°C to 120°C. It is investigated with regard to fabrication factors such as rolling reduction, rolling temperature, mixing ratio of ferromagnetic powder and Zn-22Al superplastic one, and addition of calcium stearate on characteristics of the magnetic composite material.<BR>The magnetic comosite material imparts flexibility under load. It is found that the optimum forming conditions are a reduction of approximately 90% and a rolling temperature of 80°C Residual flux density of the magnetic composite material almost reaches the theoretical value for a given ferrite content per unit volume. This means that orientation of the ferromagnetic powder is accomplished almost completely.