| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a grain oriented silicon steel sheet having uniform and satisfactory magnetic properties over the whole length of a coil. <P>SOLUTION: Regarding this production method, when a grain oriented silicon steel sheet comprising 1.0 to 5.0 mass% Si is produced, as the main agent of a separation agent for annealing, the one comprising at least 50% magnesia, and also comprising multiple oxide to be the following composition by 1 to 10 pts.mass to 100 pts.mass of magnesia is used. The above multiple oxide is (M<SP>+</SP><SB>a</SB>, M<SP>2+</SP><SB>b</SB>, M<SP>3+</SP><SB>c</SB>)AO<SB>x</SB>(wherein 2≤a+2b+3c≤6; 0≤a≤6; 0≤b≤3; 0≤c≤2; 4≤x≤6; M+ is Li, Na or K; M<SP>2+</SP>is Mg, Ca, Sr, Ba, Cr, Co, Mn, Zn or Fe; and M<SP>3+</SP>is Fe, Al, Cr, Mn, A: Si, Zr, Mo or W). <P>COPYRIGHT: (C)2007,JPO&INPIT |
