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Annealing separator for grain-oriented electromagnetic steel sheet
An annealing separator for a grain oriented electrical steel sheet does not inhibit the flowability of an atmospheric gas during the final annealing of the coil-shaped product and can prevent the occurrence of surface roughness. The annealing separator contains 0.01-0.05 mass % of Cl, 0.05-0.15 mass % of B, 0.1-2 mass % of CaO and 0.03-1.0 mass % of P2O3, and is mainly composed of magnesia having: a degree of activity of citric acid of 30-120 seconds as measured at 40% CAA; a specific surface area of 8-50 m2/g as measured by a BET method; an amount of hydration of 0.5-5.2 mass % as measured in terms of ignition loss; and a content of particles each having a particle diameter of 45 μm or more of 0.1 mass % or less, the annealing separator further containing a water-insoluble compound having a particle diameter of 45-150 μm inclusive in an amount of 0.05-20 mass % inclusive.
Annealing separator for grain-oriented electromagnetic steel sheet
An annealing separator for a grain oriented electrical steel sheet does not inhibit the flowability of an atmospheric gas during the final annealing of the coil-shaped product and can prevent the occurrence of surface roughness. The annealing separator contains 0.01-0.05 mass % of Cl, 0.05-0.15 mass % of B, 0.1-2 mass % of CaO and 0.03-1.0 mass % of P2O3, and is mainly composed of magnesia having: a degree of activity of citric acid of 30-120 seconds as measured at 40% CAA; a specific surface area of 8-50 m2/g as measured by a BET method; an amount of hydration of 0.5-5.2 mass % as measured in terms of ignition loss; and a content of particles each having a particle diameter of 45 μm or more of 0.1 mass % or less, the annealing separator further containing a water-insoluble compound having a particle diameter of 45-150 μm inclusive in an amount of 0.05-20 mass % inclusive.
Annealing separator for grain-oriented electromagnetic steel sheet
OKUBO TOMOYUKI (author) / WATANABE MAKOTO (author) / TERASHIMA TAKASHI (author)
2015-11-24
Patent
Electronic Resource
English
| European Patent Office | 2023
| European Patent Office | 2019
| European Patent Office | 2023
| European Patent Office | 2023