Patent ID: 11894167
Assignee: JFE STEEL CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 0:
1. A grain-oriented electrical steel sheet having an insulating film disposed on a surface thereon, the insulating film having a chemical composition comprising Si, P, O, and at least one selected from the group consisting of Mg, Ca, Ba, Sr, Zn, Al, Mn, and Co,
wherein the insulating film includes 20% or more of a crystal phase, the crystal phase consisting of one of Zr2P2O7, (MgCo)2P2O7, Co2P2O7, cordierite, β-spodumene, quartz, zircon, a zirconium phosphate-based crystal phase, or a tungsten phosphate-based crystal phase, and
a minimum tension provided to the steel sheet by the insulating film at a temperature in a range of 100° C. to 200° C. is 10.5 MPa or more.