| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of producing a separation agent at annealing, excellent in application workability as well as in glass film forming capacity, and a grain oriented silicon steel sheet using this separation agent at annealing. SOLUTION: This separation agent at annealing excellent in film forming capacity is composed of oxides having a mole ratio of one or >=2 elements selected from among Al, Ca, Ti, V, Cr, Mn, Fe, Sr, Co, Zr, and Sb of 0.05-10 to Mg of 100. Further, the value of (the total number of the molar numbers of the elements other than Al)/(the molar number of Al) is regulated to 0.5-10. Moreover, BET specific surface area and hydration water content are regulated to (10 to 100)m<2> /g and 0.5-6.0%, respectively. |
