Properties of soft magnetic composite with evaporated MgO insulation coating for low iron loss

被引：53
|
作者：
Uozumi, Gakuji [1 ]
Watanabe, Muneaki [1 ]
Nakayama, Rryoji [1 ]
Igarash, Kazunori [2 ]
Morimoto, Koichiro [2 ]
机构：
[1] Mitsubishi Mat Corp, 1002-14 Mukohyama, Naka, Ibaraki 3110102, Japan
[2] Mitsubishi Mat PMG Corp, Niigata 9508640, Japan
来源：
PROGRESS IN POWDER METALLURGY, PTS 1 AND 2 | 2007年 / 534-536卷
关键词：
soft magnetic composite core; iron loss; MgO; insulation coating; magnetic properties;
D O I：
10.4028/www.scientific.net/MSF.534-536.1361
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
MgO insulation coating with thickness of ca. 50nm was evaporated on the surface of iron powder and fabricated soft magnetic composite(SMC) with low iron loss. The MgO insulation coating had greater heat resistance than conventional phosphate insulation coating, which enabled stress relieving annealing at higher temperature (600C). Electrical and magnetic proper-ties of SMC was examined. The electrical resistivity of the SMC annealed at 700C was 21 mu Omega m. The iron loss at 50Hz for Bm = 1.5T was 5.34W, which was 40% of conventional SMC and was at the same level with laminated steel plate (t0.35). These results show that MgO insulation coating has enough heat resistance and adhesiveness to powder surface to obtain SMC with low iron loss.
引用
收藏
页码：1361 / +
页数：2
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