Ceramic Volume Resistivity

Electrical resistivity also called specific electrical resistance or volume resistivity and its inverse electrical conductivity is a fundamental property of a material that quantifies how strongly it resists or conducts electric current a low resistivity indicates a material that readily allows electric current.

Ceramic volume resistivity.

1 1 this test method covers the determination of the dc volume resistivity of a smooth preferably polished glass by measuring the resistance to passage of a small amount of direct current through the glass at a voltage high enough to assure adequate sensitivity. This current must be measured under steady state conditions that is neither a charging current nor a space charge buildup. Ceramic materials offer a number of benefits in a variety of applications. Silicon carbide is the least insulating ceramic with resistivity of around 1 10 6 or even less for certain forms of cvd sic.

Resistivity is commonly represented by the greek letter ρ. Macor dc volume resistivity macor is an outstanding engineering material and is machinable with ordinary metalworking tools. Quartz and macor glass ceramics are better insulators with resistivity values of over 1 10 16. They provide high wear heat and corrosion resistance as well as high tensile strength volume resistivity dielectric strength and modulus of elasticity.

Engineered ceramics tend to have high volume resistivity even at high temperatures although some ceramic materials are engineered purposefully to allow some charge through typically referred to as electrostatic discharge safe or esd safe ceramics lengthening the life of the material or protecting sensitive objects it contacts.