different mateirals Flashcards
1
Q
what are ceramics?
A
ceramics are non-metal materials that form giant ionic lattices or giant covalent structures
2
Q
what makes ceramics unreactive
A
the compounds in ceramics are oxides
3
Q
what are some properties of ceramics (3)
A
hard and stiff but brittle
high melting point
poor conductors of heat
4
Q
what must be a property of an overhead metal cable?
A
good conductor of heat
reassitant to corrosion
lightweight (not dense)
5
Q
what are properties that insulators must have
A
poor conductivity to prevent electric current passing from the cable to the pylons
6
Q
A
