The invention discloses a depression-preventing low-swell-shrinking mirror plate which adopts a stainless steel plate as a substrate, and a
coating is arranged on the surface of the stainless steel plate. The
coating comprises 30-32 parts by weight of an aluminum
oxide, 30-32 parts by weight of a
hafnium oxide, 30-32 parts by weight of a
silicon oxide, 6-8 parts by weight of a
europium oxide, 6-8 parts by weight of a
silver oxide, 2-4 parts by weight of a
palladium oxide and 2-4 parts by weight of a
bismuth oxide. According to the scheme, the stainless steel plate is taken as the substrate, the
coating on the outer surface of the stainless steel plate takes aluminum oxide,
hafnium oxide and
silicon oxide as the core, and multiple oxides having a synergistic effect are introduced, so that the
surface strength, the
surface smoothness, the
hot pressing resistance and the depression-prevention performance of the coating of the mirror plate under
high pressure are improved effectively; by means of
boron nitride,
ruthenium oxide and
zinc oxide added to the coating, the expansion extent of the coating for larger
temperature difference and
pressure difference can be improved effectively, and accordingly, bad influence of the overall swell and shrinking of the mirror plate on the using effect and the service life of the mirror plate can be avoided effectively.