What effect does thermal resistance have on thermally conductive materials?

Electrical equipment is a kind of mechanical equipment that converts electrical energy into other energy. During operation, electrical energy will circulate in the equipment. When electrical energy is converted into other energy, complete conversion cannot be achieved. Part of the energy will be lost, and a large part of this part of energy It is lost in the form of heat, which is one of the reasons why electrical equipment generates heat during operation.

Thermally conductive material is one of the materials that specifically solves the heat dissipation problem in the field of thermal management, because in the past, people would install heat sinks on the surface of power consumption electronic components, but the heat dissipation effect was very low and the temperature could not be effectively controlled. Later, people found that there was a gap between the two The gap, no matter how smooth the surface of the two is, there is still a gap in the interface. There is a poor thermal conductor air in the gap, so the heat conduction effect is very poor. At this time, it is necessary to fill the gap with a thermally conductive material so that the two can closely contact and eliminate the interface. Air improves heat transfer, thereby improving heat dissipation effect.
There is a saying in the thermal conductivity material industry: purchase depends on thermal conductivity, engineering depends on thermal resistance. It is well known that the thermal conductivity is the main point among the many parameters of thermally conductive materials. It is a measure of the thermal conductivity of thermally conductive materials. However, for engineers, they often pay attention to the thermal resistance value. So what is the effect of thermal resistance on thermally conductive materials?

Thermal resistance in professional academic analysis is the temperature difference formed at both ends of the object when the heat flow passes through the object. The thermal resistance reaction in the thermal conductive material is to guide the thermal resistance of the thermal material to heat conduction. The greater the thermal resistance of the thermally conductive material, the stronger the resistance to heat conduction. In simple terms, the thermal conductive material is like a 100-meter racetrack. The two sides are the starting point and the ending point. When the heat enters the thermal conductive material through the surface, it begins to conduct to the other side. The thermal resistance is the railing on the runway, which hinders the transfer of heat. The greater the thermal resistance, the harder it is for the heat to flow. The other side passes through, which is also the essence of thermal resistance.

Some people think that the higher the thermal conductivity of the thermal conductive material, the lower the thermal resistance. In fact, this is wrong. The thermal resistance does not necessarily depend on the high thermal conductivity and the ground. But one thing can be said. For thermally conductive materials with the same other parameters except for the resistance value, the thermally conductive material with lower thermal resistance has better thermal conductivity, while the thermally conductive material with larger thermal resistance will have poorer thermal conductivity.

When people buy or purchase thermally conductive materials, in addition to understanding their thermal conductivity, size and thickness, compression rate, and hardness, thermal resistance is also one of the key factors that affect the thermal conductivity of thermally conductive materials.