Glass ceramic and preparation method thereof

Abstract

The invention discloses glass ceramic and a preparation method thereof. The glass ceramic comprises the following raw materials in parts by weight: 10-20 parts of clay, 10-20 parts of quartz and 60-80 parts of frit. According to the glass ceramic, waste glass powder is not selected as a raw material, frits with the same transparent texture are adopted to replace the glass powder, clay is matched to enhance the strength of a green body, quartz is added to improve the firing temperature of the green body and reduce the cost, the temperature requirement of subsequent decorative glaze is met, and therefore the purposes of prolonging the storage time of the green body and prolonging the service life of the green body are achieved. The strength of a green body is improved, the firing temperature of a finished product is increased, the firing whiteness of the finished product is improved, and the stability is easy to maintain. The glass ceramic is prepared through the following steps of mixing, ball milling, granulation, drying, compression molding, blank surface decoration and semi-finished product firing. According to the invention, the dry granulation process is adaptively adopted, wherein the granular size of the raw materials is limited through ball milling and granulation, so that the mixing uniformity of the raw materials is improved, and therefore the qualified rate in the blank forming process is increased.

Description

technical field [0001] The invention relates to the technical field of glass-ceramic products, in particular to a glass-ceramic and a preparation method thereof. Background technique [0002] Due to various restrictions on Chinese ceramic building materials in the European and American markets in recent years, the demand for glass-based mosaic products that are similar to ceramics but not ceramic materials has increased dramatically. A new mosaic product is called "glass porcelain" mosaic Came into being. The market has two main requirements for "glass porcelain" products: one is that the material must be glass; the other is that the surface decoration effect must be close to or better than similar products made of traditional ceramic materials, that is, it can completely replace the original products accumulated many years ago. client needs. [0003] Most manufacturers in the market use glass powder processed from waste glass as raw material to produce "glass porcelain" p...

AI Technical Summary

Problems solved by technology

[0004] A: The strength of the green body is extremely poor with glass powder as the main raw material, and the storage time of raw materials is extremely short (generally no more than 6 hours); it is impossible to meet the production requirements of intermittent production and one-time firing of spray glaze decoration;

[0005] B: A large amount of waste glass is used as a raw material source, which will make it difficult to maintain long-term stability of raw material quality (mainly whiteness);

[0006] C: Due to the extremely low melting point of the existing waste glass materials on the market (generally lower than 750 degrees), it is difficult for the original decorative glazes applied to the body of ceramic materials to meet this low temperature requirement, thus limiting Many ceramic products cannot find substitutes;

[0007] D: Due to the strong surface activity of the waste glass powder, too strong lubricity of the powder will cause the screw of the granulator to slip, which makes it difficult for the formula material to adapt to the advanced "dry powder granulation process", and also makes the dry pressure granulation process In the process, the stability of the green body quality is greatly affected, and the qualified rate of the product is reduced the most, and the production cost is increased.

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