Grain-oriented electrical steel sheet having excellent insulation coating adhesion without forsterite coating

A grain-oriented electrical steel sheet comprising:

• a base steel sheet;
• an intermediate layer which is disposed in contact with the base steel sheet and mainly includes silicon oxide;
• and
• an insulation coating which is disposed in contact with the intermediate layer and mainly includes phosphate and colloidal silica,
• wherein the base steel sheet contains, as a chemical compositions, by mass %:
• C:
• 0.085% or less;
• Si:
• 0.80 to 7.00%;
• Mn:
• 0.05 to 1.00%;
• acid-soluble Al:
• 0.010 to 0.065%;
• N:
• 0.0040% or less;
• S:
• 0.0100% or less;
• B:
• 0.0005 to 0.0080%;
• and
• a remainder of Fe and impurities,
• BN having an average particle size of 50 to 300 nm is present on a surface layer of the intermediate layer,
• when a total thickness of the base steel sheet and the intermediate layer is defined as d, a time until a sputtering depth reaches a position of d/100 from an outermost surface of the intermediate layer when an emission intensity of B is measured using glow discharge emission spectrometry (GDS) is defined as t(d/100), and a time until the sputtering depth reaches a position of d/10 from the outermost surface of the intermediate layer is defined as t(d/10),
• an emission intensity IB_t(d/100) of B at t(d/100) and an emission intensity IB_t(d/10) of B at t(d/10) satisfy the following Equation (1), and
• a ratio of a major axis to a minor axis of the BN particle is 1.5 or less,
• IB_t(d/100)>IB_t(d/10) Equation (1).