1. What material is used to make the tiles that provide thermal protection in NASA's space shuttle?
2. Which ceramic materials are most widely used?
3. Explain how ceramic materials can be classified in different ways.
4. State any one application of the following ceramics:
(a) alumina,
(b) silica,
(c) barium titanate,
(d) zirconia,
(e) boron carbide, and
(f) diamond.