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thermal conductivity. n. 1. (General Physics) a measure of the ability of a substance to conduct heat, determined by the rate of heat flow normally through an area in the substance divided by the area and by minus the component of the temperature gradient in the direction of flow: measured in watts per metre per kelvin.
Heat and Thermal Shock Resistance. The heat resistant properties of Fine Ceramics are measured by the temperatures at which they begin to melt, and by their levels of thermal shock resistance. Thermal shock resistance refers to a material's ability to withstand rapid changes in temperature.