Production mannered null alumina of annealing separable medicine and directivity electromagnetic steel sheet for directivity electromagnetic

摘要

PROBLEM TO BE SOLVED: To profitably improve a core-loss in a grain-oriented electrical steel sheet in comparison with the conventional electrical steel sheet, in the case of using an annealing separation agent for aluminum-based grain-oriented electrical steel sheet.;SOLUTION: As the annealing separation agent for grain-oriented electrical steel sheet, to 100 mass parts of the alumina, 0.001-5.0 mass% of at least one selected among acrylic acid, acrylic acid ester and acrylic acid salt or these polymers or copolymers, are blended.;COPYRIGHT: (C)2009,JPO&INPIT