These exceptional ceramics are:

Very hard and extremely resistant to wear
Good thermal and electrical insulators
Able to retain mechanical properties at elevated temperatures
More durable than metals
Highly resistant to extremely aggressive and corrosive environments

Typical applications of engineering ceramics include:

Wear components (blades, valves, pumps, etc.)
High-voltage insulators
High-temperature tubes
Electronic substrates
Radomes
Ballistic armour
Laser cavities
Crucibles

Goodfellow's line of engineering ceramics includes but is not limited to alumina, boron nitride and zirconia and is available in a wide range of forms (rod, sheet, foam, powder, crucible, etc.) or as finished components precision-machined to customer drawings.