US 11,946,114 B2
Annealing separating agent composition for grain-oriented electrical steel sheet, grain-oriented electrical steel sheet, and method for manufacturing grain oriented electrical steel sheet
Min Serk Kwon, Pohang-si (KR); Tae Young No, Pohang-si (KR); Chang Soo Park, Pohang-si (KR); and Heon-Jo Choi, Pohang-si (KR)
Assigned to POSCO CO., LTD, Pohang-si (KR)
Filed by POSCO, Pohang-si (KR)
Filed on Dec. 14, 2021, as Appl. No. 17/550,366.
Application 17/550,366 is a division of application No. 16/345,521, granted, now 11,225,700, previously published as PCT/KR2017/011850, filed on Oct. 25, 2017.
Claims priority of application No. 10-2016-0139936 (KR), filed on Oct. 26, 2016.
Prior Publication US 2022/0119910 A1, Apr. 21, 2022
Int. Cl. C21D 9/46 (2006.01); C04B 35/465 (2006.01); C21D 1/68 (2006.01); C21D 3/04 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 8/12 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/60 (2006.01)
CPC C21D 9/46 (2013.01) [C04B 35/465 (2013.01); C21D 1/68 (2013.01); C21D 3/04 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/12 (2013.01); C21D 8/1222 (2013.01); C21D 8/1233 (2013.01); C21D 8/1255 (2013.01); C21D 8/1272 (2013.01); C21D 8/1283 (2013.01); C22C 38/001 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/60 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3232 (2013.01); C04B 2235/3236 (2013.01); C04B 2235/448 (2013.01); C21D 2201/05 (2013.01); C21D 2211/001 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An annealing separating agent composition for a grain-oriented electrical steel sheet comprising, based on a solid content of the annealing separating agent composition, 30 to 70% by weight of a calcium compound, 1 to 10% by weight of a ceramic powder and a balance of magnesium oxide or magnesium hydroxide,
wherein the calcium compound is at least one selected from the group consisting of calcium cobalt oxide (Ca3Co4O9), calcium silicate (CaSiO3), calcium titanate (CaTiO3), calcium zirconate (CaZrO3), hydroxyapatite (Ca5(OH)(PO4)3), calcium carbonate (CaCO3), calcium hydride (CaH2), calcium carbide (CaC2), calcium phosphate (Ca3(PO4)2), calcium sulfate (CaSO4), calcium oxylate (CaC2O4), calcium peroxide (CaO2), and calcium chromate (CaCrO4).