Low-shrinkage, high-strength, and large ceramic plate and manufacturing method thereof

A method for manufacturing a ceramic plate, the method comprising the steps of:

• (1) preparing a ceramic raw material powder;
• (2) subjecting an acicular wollastonite to surface coating with a silane coupling agent and to pre-dispersion with a fumed silica to obtain a pre-treated acicular wollastonite, an aspect ratio of the acicular wollastonite being 10 to 18;
• and
• (3) thoroughly mixing the ceramic raw material powder and the pre-treated acicular wollastonite, and granulating the resulting mixture, the amount of the pre-treated acicular wollastonite added being 10 wt % to 30 wt % of the ceramic raw material powder, and subjecting the resulting granules to dry pressing and sintering to obtain the ceramic plate, wherein
• in step (1), the ceramic raw material powder includes the following components:
• 8% to 20% of washed mud, 4% to 16% of mixed mud, 12% to 20% of potassium sand, 24% to 30% of medium temperature sand, 6% to 12% of sodium sand #1, 16% to 22% of sodium sand #2, and 1% to 2% of black talc,
• sodium sand #1 includes 71.73% SiO2, 17.07% Al2O3, 0.26% Fe2O3, 0.05% TiO2, 0.61% CaO, 0.08% MgO, 0.93% K2O, and 8.29% Na2O, and
• sodium sand #2 includes 70.18% SiO2, 17.34% Al2O3, 0.2% Fe2O3, 0.07% TiO2, 0.97% CaO, 0.03% MgO, 0.37% K2O, and 9.36% Na2O.