❌C6.1 (4) - materials
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what are ceramics?
hard, non-metallic materials
give 4 examples of ceramics
brick, china, porcelain, glass
give 4 typical properties of ceramics
• high melting points • hard + stiff • brittle • bad conductors of heat/electricity
GLASS a) how is it made b) what are its physical properties c) what are its uses
a) melting sand + allowing it to cool/solidify b) transparent, hard, brittle c) windows, bottles
CLAY CERAMICS a) how is it made b) physical properties c) uses
a) heat clay to a very high temperature, tiny crystals form (so it opaque) b) opaque, hard, brittle, poor conductors c) bricks + porcelain
POLYMER CERAMICS a) physical properties? b) uses?
• can be made tansparent • poor conductor of heat/electricity • tough or ductile b) plastic bags, bottles
physical properties of metals? ie. in an electric cable
good conductor • lightweight • strong • resist corrosion • low tensile strength (stretches easily)
what is tensile strength?
how much a material resists before snapping/stretching