Silt
Clay
Sand
Plaster of Paris
Ceramics materials can be defined as inorganic, nonmetallic materials comprising metal, nonmetal, or metalloid atoms held by ionic or covalent bonds. The ceramic structure is based on electric neutrality. They are generally prepared using clays and other minerals from the earth or chemically processed crystalline oxide, nitride, or carbide powders, i.e., aluminum and oxygen (alumina—Al2O3), silicon and nitrogen (silicon nitride—Si3N4), silicon and carbon (silicon carbide—SiC), etc.
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Plaster of Paris appears as white or yellowish, finely divided, odorless powder consisting mostly or entirely of calcium sulfate hemihydrate, CaSO4*1/2H2O. Forms a paste when it is mixed with water that soon hardens into a solid. Used in making casts, molds, and sculpture. Generally non-toxic.Plaster of Paris is a type of plaster made from gypsum and water.
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