A low-temperature once-fired ceramic with an opaque glaze surface and its preparation method

Abstract

The present invention relates to the field of ceramic products and production methods thereof, in particular to a low-temperature primary-fired ceramic with an opaque glaze surface and a preparation method thereof, characterized in that: the raw materials of the bottom glaze layer include the following components in parts by weight 5-6 parts of industrial iron oxide, 5-10 parts of wood ash, 3-5 parts of flint, 10-12 parts of quartz, 10-15 parts of orthoclase, the raw materials of the surface glaze layer are in parts by weight, including the following groups Parts: 10-15 parts of molten powder, 15-18 parts of quartz, 10-15 parts of feldspar, 21-25 parts of albite, 2-3 parts of cooked talc, 8-10 parts of calcite, 2-3 parts of zircon and 1‑2 parts of zinc oxide. The low-temperature once-fired ceramics with an opacified glaze surface and the preparation method provided by the present invention reduce the firing temperature, have good opacification effects, rich glaze shapes, effectively save fuel, have good blank glaze adaptability, and have high strength and hardness of the blank glaze. .

Description

technical field [0001] The invention relates to the field of ceramic products and production methods thereof, in particular to a low-temperature primary-fired ceramic with an opaque glaze surface and a preparation method thereof. Background technique [0002] With the energy crisis and the gradual depletion of fossil fuels, my country's economic development will face a crisis, so people pay more and more attention to low temperature technology. In the field of ceramic production, traditional ceramic firing generally adopts high-temperature firing (firing temperature above 1200 degrees Celsius), which consumes a lot of fuel, and the burning cost accounts for more than 30% of the ceramic production cost. Firing not only increases the production cost, but also brings great pressure to the environment. With the transformation of the national industry, the replacement of ceramic technology in the ceramic industry is also imminent. Disclosed is a low-temperature once-fired cerami...

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Problems solved by technology

[0003] Although the low-temperature once-fired ceramic products and manufacturing process disclosed in the above invention patent application can reduce the temperature in the firing process, the potassium feldspar powder and albite powder need to be calcined at a medium and high temperature at 1300°C in the raw material calcination process, which adds an additional Fuel cost, in addition, in order to reduce the firing temperature, reduce SiO 2 and Al 2 o 3 If the content is too high, it will lead to defects such as poor fluidity of the glaze, low hardness, pinholes on the glaze surface, etc.

[0004] In addition, the oxides of tin, zirconium and titanium in the existing opacifying glaze formulations are often used as opacifying agents. Among them, tin oxide and titanium oxide have good opacifying effect, but the raw material cost is high, while zirconia raw material cost is cheap, but opacifying The effect is not good. In view of this, the case arises from the