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| | Thermal conductivity - Wikipedia, the free encyclopedia |
 | | Thermal conductivity is the quantity of heat, Q, transmitted through a thickness L, in a direction normal to a surface of area A, due to a temperature difference ΔT, under steady state conditions and when the heat transfer is dependent only on the temperature gradient. |
 | | A thermal conductance tester, one of the instruments of gemology, determines if gems are genuine diamonds using diamond's uniquely high thermal conductivity, which is higher still for natural blue diamond. |
 | | A third term, thermal transmittance, incoporates the thermal conductance of a structure along with heat transfer due to convection and radiation. |
| en.wikipedia.org /wiki/Watt_per_metre-kelvin (806 words) |
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