发明名称 |
FERRITE MAGNETIC POWDER FOR BONDED MAGNETS AND BONDED MAGNETS |
摘要 |
To provide ferrite magnetic powders for bond magnet capable of surely suppressing residual hexavalent chrome, being an environmental load substance, having no adverse influence on the magnetic characteristics, which is an obstacle in use, and without damaging productivity and at a low cost. The method includes the steps of obtaining sintered powders by sintering raw material powders; wet-pulverizing the sintered powders; wet-cleaning the sintered powders; and annealing the cleaned sintered powders, wherein in the step of the wet-pulverization and in the step of wet-cleaning, generation of the hexavalent chrome, being an environmental load substance, is suppressed by performing the pulverization and cleaning while maintaining pH of a dispersion solvent at 8.5 or less, at the time of pulverization and cleaning. |
申请公布号 |
EP2003657(B1) |
申请公布日期 |
2015.04.01 |
申请号 |
EP20070737883 |
申请日期 |
2007.03.06 |
申请人 |
DOWA ELECTRONICS MATERIALS CO., LTD.;DOWA F-TEC CO., LTD. |
发明人 |
KOHAYASHI, SHUICHI;IKEDA, HIROYA;KATAYAMA, HIDEKI;AYABE, KEISUKE |
分类号 |
H01F1/113;C01G49/00;C04B35/26;H01F41/02 |
主分类号 |
H01F1/113 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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