Ceramics: Properties of ceramics materials

Ceramics

• Ceramics are compounds between metallic and nonmetallic elements; they are most frequently oxides, nitrides, and carbides.

• Examples-aluminum oxide (or alumina, Al2O3), silicon dioxide (or silica, SiO2),silicon carbide (SiC), silicon nitride (Si3N4).

• Examples of traditional ceramics — clay minerals (i.e., porcelain), cement, and glass.

Properties of ceramics materials

• Relatively stiff and strong—stiffnesses and strengths are comparable to those of the metals , very hard, extremely brittle (lack ductility),.highly susceptible to fracture.

• Thermal and electrical Properties- Insulative to the passage of heat and electricity low electrical conductivities and are more resistant to high temperatures

• Optical characteristics-Ceramics may be transparent, translucent, or opaque.

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