Ceramics, Polymers & Composites (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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How long have ceramics & composites been used?
How long have ceramics & composites been used?
Thousands of years
What are ceramics?
What are ceramics?
Solids with high melting points, not carbon compounds
Two common examples of ceramics
Two common examples of ceramics
Glass and clay
Components of soda-lime glass
Components of soda-lime glass
Sand, sodium carbonate, limestone
Components of borosilicate glass
Components of borosilicate glass
Sand and boron trioxide
Glass type with higher temperature resistance
Glass type with higher temperature resistance
Borosilicate glass
How clay ceramics are made
How clay ceramics are made
Shape wet clay, then heat to high temps in a kiln
Definition of composites
Definition of composites
Materials made from two or more different substances
Composition of reinforced concrete
Composition of reinforced concrete
Cement poured around steel or iron rods
Factors polymer properties depend on
Factors polymer properties depend on
Monomers used and production conditions
LDPE production conditions
LDPE production conditions
Moderate temperature and high pressure
HDPE production conditions
HDPE production conditions
Low temperature & pressure, with a catalyst
Thermosetting polymer behavior when heated
Thermosetting polymer behavior when heated
Do not soften when heated
Thermosoftening polymer behavior when heated
Thermosoftening polymer behavior when heated
Melt upon heating