SEPARATION AGENT FOR ANNEALING, AND METHOD FOR PRODUCING GRAIN ORIENTED MAGNETIC STEEL SHEET HAVING EXCELLENT GLASS FILM AND MAGNETIC PROPERTY

摘要

PROBLEM TO BE SOLVED: To provide a separation agent for annealing in which uniform, stable effect of reducing the melting point is obtained, and which imparts an excellent glass film and excellent magnetic properties to a magnetic steel sheet by using a water soluble compound having extremely excellent reactivity as a reaction accelerating addition agent in a glass film forming method, and to provide a method for producing a grain oriented magnetic steel sheet using the separation agent for annealing. SOLUTION: The separation agent for annealing is obtained by adding one or more kinds selected from water soluble compounds consisting of Sb and Bi in 0.005 to 0.500 pts.mass to MgO of 100 pts.mass. As for the Sb - Bi water soluble compound, an aqueous solution of one or more kinds of organometallic compounds selected from an oxycarboxylic acid compound, an oxysulfonic acid compound, an aminocarboxylic acid compound, an amine based compound and carboxylic acid compound and/or the complex compounds thereof is prepared.