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Chemical porcelain

A type of porcelain characterised by low thermal expansion, high mechanical strength and high chemical resistance. Used for laboratory ware, such as reaction vessels, combustion boats, evaporating dishes and Büchner funnels. Raw materials for the body include kaolin, quartz, feldspar, calcined alumina, and possibly also low percentages of other materials. A number of International standards specify the properties of the porcelain, such as ASTM C515.