Ceramic plate having anti-counterfeiting visual effect and preparation method therefor

A preparation method for a ceramic plate having an anti-counterfeiting visual effect, comprising the following steps:

• preparing a green body using green body powder;
• applying an overglaze on the green body;
• ink-jet printing a pattern on the surface of the green body after applying the overglaze;
• applying a protective glaze on the surface of the green body after ink-jet printing the pattern;
• applying an anti-counterfeiting material on the surface of the green body after applying the protective glaze, the raw material composition of the anti-counterfeiting material including:
• in percentage by mass, 20% to 30% of titanite, 3% to 5% of high-refractive-index oxide, and 60% to 80% of a low-temperature glaze powder;
• the chemical composition of the low-temperature glaze powder including:
• in percentage by mass, 62% to 70% of SiO2, 16% to 18% of Al2O3, 5.5% to 8.5% of alkaline earth metal oxides, 2.7% to 4.5% of alkali metal oxides, and 1% to 3% of ZnO;
• the high-refractive-index oxide(s) being cerium oxide and/or tin oxide;
• and the particle sizes of the high-refractive-index oxide(s) and titanite being independently selected from 1 to 2 μm;
• firing the green body after applying the anti-counterfeiting material, the titanite and the high-refractive-index oxide being wetted and wrapped by a molten liquid generated by melting the low-temperature glaze powder in a firing environment, and sunken into the protective glaze without generating opacification;
• and
• polishing to obtain the ceramic plate having the anti-counterfeiting visual effect, wherein
• the anti-counterfeiting visual effect is a visual effect in which a high-intensity refraction effect is achieved when a sight line direction is consistent with a path of reflected light, but no refraction effect is achieved when the sight line direction deviates from the path of reflected light.