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9E science (About Ceramics (Ceramics are a range of hard, durable, and non…
9E science
About Ceramics
Ceramics are a range of hard, durable, and non-metallic materials, which are generally unaffected by heat
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In a lattice structure, there are a large number of atoms in a fixed regular patter, all joined together by strong bonds
Slower coolings produce larger crystals because the atoms have more time to form a grid-like lattice structure
Ceramics are stiff because there are may stops bonded to each other, with strong bonds, in a rigid structure
Polymers
Polymers have molecules made of long chains, which contain repeated groups of atoms
Rubber, plastic, and wool are examples of polymers
Polymers tend to be lightweight, ductile, unreactive, and are poor conductor of electricity and heat
When rubber is heated with sulfur, a reaction occurs and form a cross-link between atoms. This hardens the rubber,
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Composite Materials
Composite materials are combination of two or more materials, with some properties from each
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Cement is mainly calcium oxide, which is made by roasting calcium carbonate. This reaction is called a thermal decomposition
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