Since thermoelectric devices work by maintaining a temperature difference between their different sides, it is important that the used materials have low conductivity, i.e. are good thermal insulators ...

Figure 2: Thermal conductivity measurements ... measurement and measuring the block temperature. Thermal resistance was computed as the temperature difference between the resistor and thermocouple ...

In typical electronic devices, temperature is the primary physical variable that controls conductivity ... difference between quantum levels within a molecule can be much larger than the thermal ...

If we divide 1 m2 of our envelope by the temperature difference between its faces ... obeys the thickness of each layer and its thermal conductivity (ability to conduct the heat of each material).