Multifunctional protective coating and preparation method therefor, and coated product and use

Abstract

Provided are a multifunctional protective coating, a preparation method, a coated product, and an application thereof. The multifunctional protective coating contains a material with the chemical formula SixNy, where the material satisfies the following characteristics: (a) x and y are atomic ratios, with 0.39≤x≤0.43 and 0.57≤y≤0.61; (b) a full width at half maximum (FWHM) of a Fourier Transform Infrared (FTIR) spectrum at a peak position range of 838˜875 cm−1 is 247˜313 cm−1; (c) a refractive index at 550 nm is 2.0˜2.2; and (d) the hydrogen content, by the atomic percentage, is ≤1%. The multifunctional protective coating combines high refractive index, high nano-hardness, high scratch resistance, low stress, and high durability.

Dependencies are inferred from the claim text.