Ceramics, pronounced suh RAM ihks, are one of the three most important types of engineering materials that are primarily synthetic. The other two are metals and plastics. Ceramics include such everyday materials as brick, cement, glass, and porcelain. They also include unusual materials used in electronics and spacecraft. Most ceramics are hard and can withstand heat and chemicals. These properties give them a variety of uses in industry. Artists also create ceramics. This article discusses the use of ceramics in industry.
Properties of Ceramics:
Manufacturers of Ceramic Products make common ceramics from such minerals as clay, feldspar, silica, and talc. These minerals, called silicates, form most of the earth's crust. Clay is an important silicate. But it is not used in all ceramic materials. Glass, for example, is made from sand. Chemists make materials called advanced ceramics in the laboratory from compounds other than silicates. These compounds include alumina, silicon carbide, and barium titanate.
Most ceramic products, like their mineral ingredients, can withstand acids, gases, salts, water, and high temperatures. But not all ceramic products have the same properties. Common ceramics are good insulators–that is, they conduct electricity poorly. However, certain ceramics lose their electrical resistance and become superconductors when they are cooled. Some ceramic materials are magnetic. Engineers control the properties of ceramics by controlling the proportion and type of materials used in Ceramic Tower Packing company.
Kinds of ceramic products:
The properties of ceramics make them especially suitable for certain products. Products made of ceramic materials include abrasives (materials used for grinding), construction materials, dinnerware, electrical equipment, glass products, and refractories (heat-resistant materials).
Abrasives: Manufacturers use some extremely hard ceramic materials for cutting metals and for grinding, polishing, and sanding various surfaces. These Ceramic materials include alumina and silicon carbide.
Construction materials: Clay and shale are used in making strong, durable bricks and drain pipes for homes and other buildings. Tiles are made of clay and talc. Cement consists chiefly of calcium silicates and is used primarily in making concrete. Gypsum is used to produce plaster for the surfaces of walls and ceilings. Bathtubs, sinks, and toilets are made of porcelain, which consists chiefly of clay, feldspar, and quartz.
Dinnerware: Ceramics make excellent containers for food and drinks. They do not absorb liquids, and they resist acids, salts, detergents, and changes in temperature. Most ceramic dinnerware is made from a mixture of clays, feldspar, and quartz.
Making ceramics.
The clays and other minerals used in ceramics are dug from the earth and refined to improve their purity. Machines crush and grind the materials into fine particles. The particles are mixed in the proper proportion, and water or other liquid is added to produce a mixture that can be shaped. A gluelike substance is sometimes added to mixtures that do not contain clay. Glass and some refractory products are made by melting the particles and shaping them when they are molten.
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