They ar classified as non-crystalline and crytalline ceramics . The non-crystalline ceramics are formed from melts and are called glass ceramic . They are produced after a great range of processing whereas the crystalline ceramics do nor require much doling out . Apart from the ones discussed above , ceramics have a wide range of usage .
- It is used in making knives and ceramic knives are sharper than steel knives . Though they are brittle , their blades are more durable .
- Ceramics like alumina and boron carbide are used as "Small Arms Protective Inserts"
- Steel can be replaced by ceramic ball bearings . Due to their hardness they have a longer lifetime . Their electrical insulating capacities are also valuable in bearings but a major drawback is their high cost .
- Ceramic engines can be used in laboratories due to their high fuel efficiency and they do not need any cooling system . However mass production is not possible becaouse cracks can easily develop in ceramics which may result in dangerous equipment failue .
- Nowadays bio-ceramics are made which include synthetic bone and dental implants .
- High tech ceramic is also employed in making watch cases .
