Ceramics is a general term for pottery and porcelain. Chinese invented pottery as early as about 8000-2000 BC (Neolithic). Ceramic materials are mostly oxides, nitrides, borides and carbides. Common ceramic materials are clay, alumina, kaolin and so on. Ceramic materials are generally harder, but less malleable. In addition to the use of utensils and decorations, it also plays an important role in the development of science and technology. Ceramic raw materials are made by quenching clay from the earth's original resources. The nature of clay is tough, room temperature can be plastic in contact with water, slightly dry can be carved, fully dry can be ground; Burned to 700 degrees can be made into pottery can be filled with water; Burned to 1230 degrees Celsius, it is porcelain, which can be completely non-absorbent and resistant to high temperature and corrosion. The flexibility of its usage is still used in a variety of creative applications in today's cultural technology.
Ceramics are made of clay as the main raw material and various natural minerals after crushing, mixing, molding and calcination, as well as various products. People call an item made of clay fired at a high temperature in a special kiln ceramics, and ceramics are a general term for pottery and porcelain. The traditional concept of ceramics refers to all artificial industrial products that use inorganic non-metallic minerals such as clay as raw materials. It includes various products made of clay or mixtures containing clay that have been mixed, formed, and calcined. From rough earthenware to fine pottery and porcelain, it belongs to its range. For it, the main raw material is the silicate minerals (such as clay, quartz, etc.) taken from nature, so it belongs to the category of "portland industry" with glass, cement, enamel, refractory materials and other industries.
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