Title:
MAGNESIA FOR ANNEALING AND SEPARATING AGENT OF GRAIN ORIENTED SILICON STEEL SHEET AND METHOD FOR MANUFACTURING GRAIN ORIENTED SILICON STEEL SHEET HAVING EXCELLENT MAGNETIC CHARACTERISTIC AND FILM CHARACTERISTIC
Document Type and Number:
Japanese Patent JP3536776
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a technique capable of stably improving magnetic characteristics and film characteristics by improving magnesia which is an essential component of an annealing and separating agent.
SOLUTION: The magnesia, which is 35 to 120 seconds in citric acid activity and 0.30 to 4.50 μm in average grain size, contains 0.20 to 0.90 mass % CaO, 0.02 to 0.75 mass % SiO3 and 300 to 2000 mass ppm B, further has a surface Cl content of 0.005 to 0.045 mass % and a total Cl content of 0.008 to 0.060 mass % and is 0.50 to 0.95 in the ratio s-Cl/t-Cl of the surface Cl content (s-Cl) and the total Cl content (t-Cl), is used as the essential component of the annealing and separating agent.
Inventors:
Watanabe, Makoto
Toda, Hiroaki
Honda, Atsuto
Toda, Hiroaki
Honda, Atsuto
Application Number:
JP2000124096A
Publication Date:
June 14, 2004
Filing Date:
April 25, 2000
Export Citation:
Assignee:
KAWASAKI STEEL CORP
International Classes:
C23C22/00; C21D1/70; C21D9/46; C22C38/00; C22C38/60; H01F1/16; (IPC1-7): C23C22/00; C21D1/70; C21D9/46; C22C38/00; C22C38/60; H01F1/16
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