Preparation method of bone china low-temperature hard glaze

Abstract

The invention discloses a preparation method of bone china low-temperature hard glaze, and belongs to the technical field of ceramic production. The low-temperature hard glaze is prepared from the following raw materials in percentage by mass: 0.10 percent to 0.90 percent of Li2O, 0.50 percent to 6.00 percent of B2O3, 6.00 percent to 11.00 percent of CaO, 7.00 percent to 10.00 percent of ZnO, 3.00 percent to 6.00 percent of K2O, 3.00 percent to 6.00 percent of Na2O, 55.00 percent to 65.00 percent of SiO2 and 7.00 percent to 11.00 percent of Al2O3, wherein the sum of the mass fractions of the raw materials is 100 percent. The use amount of ZnO in the existing low-temperature glaze is reduced, a proper amount of Li2O and B2O3 are added, and the use amount of CaO is increased, so that the hardness is increased to 6.3 GPa on the premise of not increasing the glaze firing temperature, and the acid and alkali resistance of the glaze surface reaches the acid and alkali resistance level A of the domestic ceramic glaze surface.

Description

technical field [0001] The invention belongs to the technical field of ceramic production, and in particular relates to a preparation method of low-temperature hard glaze for bone china. Background technique [0002] Bone china is porcelain made by adding herbivorous animal bone charcoal powder to ceramic raw materials. Bone china is characterized by light texture, fine and hard, not easy to wear and tear, high whiteness, good transparency, crystal clear, white and translucent under the irradiation of visible light. Bone china is famous both at home and abroad for being "thin as paper, white as jade, bright as a mirror, and sound like a chime", and is the best in ceramics. Bone charcoal for the production of bone china is made by degreasing, degumming, and burning at high temperature from the bones of herbivores. The production of bone china is different from traditional porcelain. It must be fired at high temperature and glazed at low temperature. out of shape. Then app...

AI Technical Summary

Problems solved by technology

However, this low-temperature enamel bone china product also has obvious deficiencies in the use process: first, the glaze hardness is low, which is obviously lower than that of ordinary porcelain products, and scratches are easily produced during use, especially for western tableware; It is poor in stain resistance, and it is difficult to clean after staining. The essence is poor acid and alkali resistance.

The inadequacies of these bone china products in the process of use seriously restrict its due practicability

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