| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-loss oxide magnetic material for induction heating equipment which does not cause malfunctions and has a high Tc (Curie temperature). SOLUTION: A low-loss oxide magnetic material which has a Curie temperature of 240 deg.C and the power loss of which becomes the minimum at 150 deg.C is prepared by mixing <=0.05wt.% SiO2 (excluding 0wt.%), <=0.1wt.% CaO (excluding 0wt.%), and at least one kind selected from among <=0.1wt.% Ta2 O5 , ZrO2 , Nb2 O5 , and V2 O5 (excluding 0wt.%) and <=0.5wt.% HfO2 (excluding 0wt.%) in a main component composed of 52.0-54.0mol% Fe2 O3 , 40.0-45.0mol% MnO, and the remaining mol% ZnO as essential sub-components. |
