Ceramics Electrical Resistivity

Alumina 94 97 demonstrates high electrical resistivity and strength and low dielectric loss.

Ceramics electrical resistivity. Conductive ceramics advanced industrial materials that owing to modifications in their structure serve as electrical conductors. Sic ceramics with added be had an extremely high electrical resistivity of 3 10 12 cm. In addition to the well known physical properties of ceramic materials hardness compressive strength brittleness there is the property of electric resistivity most ceramics resist the flow of electric current and for this reason ceramic materials such as. On the other hand sic ceramics with added b and al had electrical resistivities of 2 10 and 0 8 cm respectively.

High purity alumina advanced ceramics 94 have the highest resistivity values 1 10 14 followed by aluminium nitride 1 10 12 sintered silicon nitride 1 10 10 and zirconia 1. The si unit of electrical resistivity is the ohm metre and corresponds to the resistance measurement of a test piece of a given cross section and length. They provide high wear heat and corrosion resistance as well as high tensile strength volume resistivity dielectric strength and modulus of elasticity. Aluminas aluminum oxide al 2 o 3 are a commonly used technical ceramic with a range of high performance properties including excellent dielectric behavior.

The differences in the electrical resistivity of the dense sic ceramics were considered to be due to different solubilities of the. Aluminum nitrides aln are used in many. Lanthanum yttrium barium copper oxide ceramic may be superconducting at temperature as high as 138 k.