The invention discloses medium-temperature matte
glaze. The medium-temperature matte
glaze is prepared from the following components:
potassium feldspar powder,
quartz powder,
calcite powder, calcinedtalc powder, calcined
zinc oxide, calcined bone carbon powder, calcined
alumina, kaolin and a colorant. A preparation method of the medium-temperature matte
glaze comprises the following steps: materials are prepared in accordance with the components in parts by
mass, wet ball milling is preformed, and glaze is obtained; the glaze is treated by a 120-mesh
sieve after being discharged from a ballmill, glaze
slurry is obtained, and water and an
electrolyte are added to adjust the concentration and
thixotropy of the glaze
slurry respectively; a glaze body is immersed in the glaze
slurry and dried and enters a roller
kiln to be sintered. According to the medium-temperature matte glaze, dense
pyroxene crystals are prepared from the raw materials under the condition of medium temperature to generate matt; besides,
phosphorus pentoxide introduced by adding the bone carbon powder can form a
silicate glass phase and a
phosphate glass phase with
silicon dioxide and
metal oxide, the two phasesare not soluble mutually and have different dissolving capacities to the colorant, color differences are produced, and
ceramic products of various colors can be obtained.