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China clay, also known as kaolin, is a white clay mineral used in ceramics for centuries. It is one of the most important ingredients in the production of porcelain, a type of ceramic ware that is valued for its strength and translucency. China clay is also used in many other types of ceramics, such as stoneware, earthenware, and terracotta.
The main component of china clay is kaolinite, a hydrated aluminum silicate mineral. This mineral is formed when weathering and erosion break down the feldspar and mica minerals found in granite and other rocks. China clay is mined in many countries, including the United States, China, and Australia.
When used in ceramics, china clay is mixed with other materials such as quartz, feldspar, and ball clay. This mixture is then ground into a fine powder and mixed with water to form a clay body. The clay body is then shaped into the desired form and left to dry. Once dry, the clay is fired in a kiln at temperatures ranging from 1,200 to 1,400 degrees Celsius. This firing process causes the clay to become hard and durable.
China clay is valued in ceramics for its ability to create a smooth, white surface. It is also valued for its plasticity, which allows it to be easily shaped and molded. In addition, china clay has a low thermal expansion rate, which means that it is less likely to crack during the firing process.
China clay is used in many different types of ceramics, from tableware and decorative pieces to tiles and figurines. It is also used in pottery, sculpture, and jewelry making. In addition, it is used in the production of paper, paint, and rubber.
Overall, china clay is an important component in the production of ceramics. It is valued for its ability to create a smooth, white surface, its plasticity, and its low thermal expansion rate. As such, it is an essential ingredient in the production of many different types of ceramics.
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