(e) Mica-glass compositions for high-temperature insulation applications.
Typical electrical resistivity of a ceramic material is of the order of 1012 หน่วย,with dielectric strengths in the region of 12 MV/m or more. Tensile strength is about 45 N/mm,and compressive strength about 750 N/mm . Ceramics are almost always very hard brittle ,and can withstand high temperatures.