Ceramic glaze is made of clay, feldspar, and quartz materials.
Ceramic glaze is made of clay, feldspar, and quartz as raw materials, and is prepared by adding water and grinding according to the proportion. It is generally applied to the surface of the body for firing ceramics. Ceramic glaze can prevent the erosion of liquids and gases, and can also increase the aesthetics of ceramics to a certain extent. It is also easy to maintain and maintain the luster of the ceramic surface.
Glazing technology is a kind of ancient ceramic production technology, which refers to applying glaze slurry on the surface of the formed ceramic body. The main function of glazing is to protect the body, make the surface of the product smooth, impermeable and non-polluting, and improve the mechanical strength, surface hardness, chemical stability and thermal stability of ceramic products.
Glaze can cover up defects in the body and greatly improve the decorative effect of ceramic products. The glaze layer can prevent toxic elements in the color material from leaching out, and can increase the functions of the product, such as sterilization, anti-static, luminescence and other functions.
The glaze is truly uncoated, wear-resistant and not easy to scratch, has excellent resistance to chemical corrosion, and is safe, healthy and long-lasting to use. The ceramics we use every day are generally dressed in smooth, smooth clothes. This kind of clothes on ceramics is called "glaze".
What kinds of glazes are there for ceramics?
1. Raw glaze, which is made by grinding materials that have not been melted. Usually we can divide it into long Stone glaze and lime glaze. Feldspar glaze has high hardness, excellent gloss, and milky white color, but its expansion coefficient is large and cracks are prone to occur. Lime glaze is also very hard, has good gloss, and has very high transparency, but its melting range is not large, so it easily causes smoke when fired. It is mostly used in decorative products.
2. Frit glaze, which is made by mixing various materials and inorganic raw materials in corresponding proportions and then melting and grinding them at high temperature. When finely ground, it can be mixed with a small amount of plastic clay. The glaze produced will be more stable and have excellent adhesion. It is characterized by a very smooth glaze surface with few pinholes. It is mostly used on soft porcelain products, such as bone china, talc porcelain, glazed tiles, etc.
3. Molten salt glaze, which is characterized by a relatively thin glaze layer but high hardness. It is usually closely combined with the embryo body, has good acid and alkali resistance, and has first-class thermal stability. , mostly used in chemical ceramic products.
4. Earth glaze, we usually call it mud glaze, is made from pure natural clay through washing. Its color ranges from yellowish brown to dark brown, and its characteristics are: It is very simple to make and saves a lot of cost. It is mostly used on ceramic products.