Ceramic refers to materials mainly composed of inorganic substances such as oxide, nitride, carbide, etc. It generally exceeds metallic or organic materials in terms of corrosion resistance, heat resistance, wear resistance, etc. and occupies the most important position among the modern industrial materials with its wide range of functions (electromagnetic function, mechanical function, optical function, biological function, etc.). Ceramic has a wide range of applications including computer memory cells, semiconductor ferroelectric and ferromagnetic materials, which are essential in electronics industry, along with materials for the nuclear industry, nuclear-property materials, radiation shielding materials, special weaponry products of aerospace engineering products, and, most of all, the superconductive materials, which are expected to bring about the third industrial revolution. Cement, glass enamel, refractory, heat insulation materials, clay products for construction, pottery, etc. are classic examples of ceramic. CRT of TV sets, glass fiber, etc. are indispensable examples of ceramic products in our lives.
1. Not easily melt in fire.
2. Strong resistance to oxidation and corrosion.
3. High melting point and little change at normal temperature.
4. Due to strong cohesive power between atoms, hard and strong and thus fragile.
5. Without free electrons as in metal, does not conduct heat and electricity well.