Annealing separator for grain oriented silicon steel strips
AssigneeNippon Steel Corporation
InventorsYoshitaka Hiromae, Kazuo Nakamura, Hajime Nitto
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Abstract
An annealing separator useful for producing a grain oriented silicon steel strip having an excellent magnetic property, comprises non-hydrating magnesium oxide which has been calcined at a temperature of 1300.degree. C. or more, preferably, from 1300.degree. to 2100.degree. C., and which is in the form of fine particles, 70% by weight of which have a size of 5 microns or less, and optionally, magnesium hydroxide in an amount of 1 to 100% based on the weight of the magnesium oxide and/or an aluminium compound in an amount of 0.05 to 10% based on the weight of the magnesium oxide.
Claims10
An annealing separator for grain oriented silicon steel strips, comprising (1) non-hydrating magnesium oxide which has been calcined at a temperature of 1300.degree. C. or more and which is in the form of fine particles, 70% by weight or more of which particles have a size of 5 microns or less, and (2) at least one member selected from the group consisting of magnesium hydroxide in an amount of from 1 to 100%, based on the weight of said magnesium oxide, and aluminum compounds in an amount of from 0.05 to 10%, based on the weight of said magnesium oxide.
Dependencies are inferred from the claim text.