| 摘要 |
Annealing separator for heat treatment of a silicon steel sheet comprising not more than 0.2% SO3, not more than 0.04% Cl with the balance being MgO and unavoidable impurities, and having a bulk density between 0.18 and 0.30 g/cm3, and a particle size distribution of 40 to 70% of particles not larger than 3 mu m, 10 to 25% of particles not smaller than 10 mu m, not more than 15% of coarse particles larger than 15 mu m with the balance being intermediate particles between 3 mu m and 10 mu m. |
