磁滞电动机的转子一般都由铁钴钒(Fe-Co-V)或铁钴钼(Fe-Co-Mo)合金制成圆筒形，如将它的转子制成凸极形，即相差90度电角度的轴上磁阻不同，则该电动机还能产生磁阻转矩，与其磁滞转矩迭加。
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W-Mo-Co-Fe 钨钼钴铁
Fe Mo Co O catalyst 铁钼钴三元催化剂
The influences of preparation method, the calcined temperature and auxiliary forming reagent on the activity of the Fe Mo Co o catalyst for oxidation of methylal to formaldehyde were studied.
考察了制备方法、焙烧温度和成型助剂对甲缩醛氧化制甲醛铁钼钴三元催化剂活性的影响。
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