Grain-oriented electrical steel sheet

A grain-oriented electrical steel sheet comprising:

• a base metal steel sheet,
• an intermediate layer disposed on and in contact with the base metal steel sheet, and
• an insulation coating disposed on and in contact with the intermediate layer,
• wherein the intermediate layer is an oxide film satisfying the followings:
• Si content:
• 20 to 70 atomic %,
• O content:
• 30 to 80 atomic %,
• Mg content:
• 20 atomic % or less,
• P content:
• 5 atomic % or less, and
• Fe content:
• less than 20 atomic %;
• and
• the average thickness of the oxide film is 2 to 500 nm;
• and
• wherein the insulation coating is a phosphate coating satisfying the followings:
• P content:
• 5 to 30 atomic %,
• Si content:
• 5 to 30 atomic %,
• O content:
• 30 to 80 atomic %,
• Al content:
• 0.1 to 10 atomic %,
• Cr content:
• less than 1 atomic %,
• Fe content:
• less than 25 atomic %,
• Mg content:
• 0 to 10 atomic %,
• Mn content:
• 0 to 10 atomic %,
• Ni content:
• 0 to 10 atomic %,
• Zn content:
• 0 to 10 atomic %,
• V content:
• 0 to 10 atomic %,
• W content:
• 0 to 10 atomic %,
• Zr content:
• 0 to 10 atomic %,
• Co content:
• 0 to 10 atomic %, and
• Mo content:
• 0 to 10 atomic %, and
• the average thickness of the phosphate coating is between 0.1 μm and 10 μm, and
• wherein when grazing incidence X-ray diffraction is performed on the phosphate coating using a Co-Kα excitation source, the X-ray diffraction pattern has a diffraction peak originating from cristobalite-type aluminum phosphate at a diffraction angle of 2θ=24.8°,
• wherein a peak intensity of a diffraction peak appearing at a diffraction angle 2θ=34.3° is 0.50 times or less than a peak intensity of the diffraction peak appearing at the diffraction angle 2θ=24.8° under diffraction conditions where an X-ray incident angle ω=0.5°,
• and
• when a half value width of a diffraction peak under a diffraction condition where the X-ray incident angle ω=0.5° is represented as FWHM0.5 and a half value width of a diffraction peak under the diffraction condition where the X-ray incident angle ω=1.0° is represented as FWHM1.0, FWHM0.5 and FWHM1.0 satisfy the followings:
• 0.20°≤FWHM0.5≤2.00°,
• 0.20°≤FWHM1.0≤2.00°, and
• 0°≤|FWHM0.5−FWHM1.0|≤1.00°.