What are the factors that affect the thermal conductivity of thermal conductive silicone pad?

What are the factors that affect the thermal conductivity of thermal conductive silicone pad?

 

For most electronic product R & D engineers, understanding the characteristics of various thermally conductive materials is their indispensable homework. Only with sufficient knowledge of the materials

 

What kind of thermal pad is good? Considering which aspects of a thermally conductive silicone sheet?

 

Thermal Conductivity

 

This is a factor that everyone is most concerned about. Thermal conductivity refers to a 1m thick material with a temperature difference of 1 degree (K, ℃) on the surface of both sides under stable heat transfer conditions. In 1 hour, the heat transferred through an area of 1 square meter is expressed in watts / meter · degree (W / (m · K), where K can be replaced by ℃). The higher the thermal conductivity of the thermal

 

 

Density

 

The porosity of various thermal insulation materials is usually very high. Relatively, their

 

Hardness selection

 

When measuring the hardness of thermally conductive materials, Shore hardness is generally used. The test principle is to drop a prescribed diamond punch from a fixed height on the sample surface. The punch bounces a certain height, and the ratio of the bounce height to the drop height is used to calculate the Shore (Shore) hardness.

Thermal conductive silicone

However, the smaller the hardness ≠ the better the thermal conductivity, and

Thickness selection

 

The silicone material has a certain compression resistance, which can effectively reduce the heat flow transmission distance by compressing

 

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