Why are thermal phase change films more and more popular?

The common heat dissipation composition is composed of radiator, heat source and heat conduction material, because there is a gap between the radiator and the heat source, no matter how squeezed, the gap cannot be removed, and there is a large amount of air in the gap, which is the heat conduction The poor body will lead to low heat conduction efficiency and lead to unsatisfactory heat dissipation. Thermally conductive materials are currently widely used to solve heat dissipation problems, mainly to fill the gap between the heat source and the radiator to reduce thermal resistance and improve heat transfer efficiency.

Thermally conductive phase change materials refer to substances that change shape with temperature changes and provide latent heat. The process of a phase change material changing from a solid to a liquid or from a liquid to a solid is called a phase change process. The key performance of a phase change material is its phase change characteristics. It is a solid at room temperature and is easy to operate. When the temperature reaches a specified range , Will become soft and in the form of a paste. This ability to completely fill the air gap between the gap and the gap between the device and the heat sink makes the phase change pad superior to non-flowing elastomer or graphite-based thermal pad, and obtains similar to thermal grease The performance of it can fill the tiny pits in the gap and greatly reduce the thermal resistance of the contact surface.

The main feature of the thermally conductive phase change film is that it can well integrate part of the characteristics of the thermally conductive silicone sheet and the thermally conductive silicone grease. It is a solid sheet at room temperature, which can be easily mounted like a thermally conductive silicone sheet and is easy to resume work. Then in the phase change temperature range, the thermally conductive phase change sheet will become soft, so that it can effectively fill the gap between the heat source and the radiator, and exclude air. The thermal resistance of liquid thermal conductive material is lower than that of solid, so thermal conductivity The effect is even more.

Although the thermally conductive phase change sheet will be soft when the temperature reaches the phase change temperature range, it will not flow out. After the thermally conductive phase change sheet becomes soft, it is like a thermally conductive gel and has a high viscosity, so generally qualified thermally conductive phase change The film will not flow out, and its thermal conductivity is not worse than thermal grease. And it’s easier to clean and replace than thermal grease

There are many advantages of thermally conductive phase change films, and the future application prospects are also very broad.