Most people have seen the results of thermal shock - have seen a glass
or ceramic item from the oven fracture when it contacts cold water.
Ceramics are able to operate at very high temperatures, because their melting temperature is very high. Most ceramics and glasses have melting temperatures above 2000°C, a temperature much higher than that for metals and polymers. As a result, ceramics are often used in high temperature applications.
Similarly to metals, ceramics creep when they are hot. The difference between ceramics and metals is the temperature at which creep occurs. Creep occurs when the temperature is above about 0.4-0.5 Tm. Metals will therefore creep at relatively low temperatures - lead begins to creep at room temperature and aluminium alloys will begin to creep from about 250°C. Ceramics have melting temperatures much higher than metals and will only creep when they are exposed to stresses at much higher temperatures. Therefore creep is not usually a limitation when designing with ceramics. Glasses will however creep at lower temperatures, but at very slow rates.