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The reciprocal of thermal conductivity is thermal resistivity (from this source). In analogy to ohm resistance, where the resistance depends from both the current flow and the potential difference, you are right saying that it is showing "the amount of heat that transfers through a material" and "the speed at which the heat transfers".


Thermal conductivity measures the speed at which heat energy travels through material. That's different to the speed at which changes in temperature travel through material, which is driven by a combination of thermal conductivity and thermal mass. So, to use your example, concrete has a high thermal conductivity: it will lose heat energy quite quickly, so ...


One of the best ways to explain concepts like this are to use labelled diagrams, such as with a very nice explanation from the CBFT blog page, with a nice definition: When the temperature of one surface of a solid material is higher than another, heat will move through the material. Depending on the characteristics of the material, this conductive ...


It represent the speed actually. it is defined as: "The amount of energy that is transferred from A to B where $AB=1meter$ and difference between the temperature of point A and B is 1 kelvin, in each second." for example the the thermal conductivity of wood is about 0.4 . it means if you have a wood with a length of 1 meter and and $\Delta(\theta)=1 ...

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