Annealing separator composition for grain- oriented electrical steel sheet, grain-oriented electrical steel sheet, and method for producing grain-oriented electrical steel sheet
AssigneePosco
InventorsMin Serk Kwon, Chang Soo Park, Heon-Jo Choi, Se-Min Park
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Abstract
The present invention provides an annealing separator composition, a grain-oriented electrical steel sheet and a method for manufacturing a grain-oriented electrical steel sheet. An annealing separator composition for a grain-oriented electrical steel sheet according to an embodiment of present invention comprising: on the basis of total solid 100 wt %, 5 to 70 wt % of mullite; and the remainder being magnesium oxide or magnesium hydroxide.
Claims11
A grain-oriented electrical steel sheet comprising a substrate and a coating formed on one or both sides of the substrate, wherein the coating comprises a mixture of mullite and forsterite,
- wherein the grain-oriented electrical steel sheet further comprises a ceramic layer formed on the coating,
- the ceramic layer comprises ceramic powder,
- the ceramic powder comprises at least one selected from Al2O3, SiO2, TiO2, ZrO2, Al2O3—TiO2, Y2O3, 9Al2O3·2B2O3, BN, CrN, BaTiO3, SiC, and TiC.
Dependencies are inferred from the claim text.