The invention provides a method of preparing a low-expansion heat-resistant
ceramic plate. The method comprises the following steps: mixing raw materials of the plate according to a formula, performing ball milling by using a
ball mill, after iron is removed, adjusting a
water content of
slurry, performing
spray granulation, performing aging in a material bin, and preparing a blank by using an automatic
brick machine to obtain a plate blank body; sending the plate blank body to a roller
kiln, performing pre-
sintering, performing pulverization, performing ball milling by using a
ball mill, after iron is removed, adjusting a
water content of
slurry, performing
spray granulation, performing aging in a material bin, and preparing a blank by using an automatic
brick machine to obtain a plate; mixing
glaze materials according to a formula, performing ball milling by using a
ball mill, after iron is removed, adjusting a
water content of
glaze slurry, and
coating the plate for 2-4 times; and sending the
glaze-coated plate into a roller
kiln, performing temperature
programming for firing, and performing
polishing to obtain the finished product. According to the method for preparing the low-expansion heat-resistant
ceramic plate provided by the invention, the product prepared by the method has the advantages of good
heat resistance, high strength, a low expansion coefficient, and no water penetration.