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The professional teaches you how to choose the thermal silicone pad

The professional teaches you how to choose the thermal silicone pad

The definition of thermally conductive silicone film

Thermal silica gel film is based on silica gel as the substrate, add thermal conductivity powder, flame retardant and other auxiliary materials, through a special process of synthesis of a thermal medium material. The industry also known as the thermal silicone pad, silicone heaters and so on.

 

The role of thermal silica pad

1) thermal conductivity of silicone film only play a role in thermal conductivity, heat generator and heat dissipation device between the formation of a good thermal conduction path, and heat sink, structural fixtures (fans), etc. together to form a cooling module;

2) The main purpose of thermal conductivity of silicone film is to reduce the heat source surface and heat dissipation device contact surface between the contact resistance generated;

3) thermal silicone film can be a good filling the gap between the contact surface, the air out of the contact surface, the air is hot bad conductor, will seriously hinder the heat transfer between the contact surface; with thermal silicone film supplement, you can So that the contact surface better contact, really face to face contact, the temperature response can be achieved as small as possible temperature difference.

Thermal conductivity of silicone film advantages and disadvantages

advantage

1, the material is soft, good compression performance, good thermal insulation properties, the thickness of the adjustable range is relatively large, suitable for filling the cavity, both sides with natural viscosity, operability and maintainability;

2, the choice of thermal conductivity of silicone film is the main purpose is to reduce the heat source surface and heat dissipation device contact surface between the contact thermal resistance, thermal silica gel film can be a good filling the contact surface of the gap;

3, because the air is hot bad conductor, will seriously hinder the heat transfer between the contact surface, and in the heat source and the heat sink between the installation of thermal silicone film can be out of the air contact surface;

4, with the thermal silicone film supplement, you can make the heat source and the radiator between the contact surface better contact, really face to face contact in the temperature response can be achieved as small as possible temperature difference;

5, thermal conductivity of silicone film thermal conductivity with adjustable, thermal stability is also better;

6, thermal conductivity of silicone film in the structure of the poor work to reduce the radiator and heat dissipation of the structural parts of the poor requirements;

7, thermal silicone film with insulation properties (the characteristics of the need to add the appropriate material in the production);

8, thermal conductivity of silicone film with shock absorption sound effect;

9, thermal silicone film with the installation, testing, reusable convenience.

Disadvantages

Relative thermal grease, thermal silica gel has the following shortcomings:

1, although the thermal conductivity is higher than the thermal grease, but the thermal resistance is also higher than the thermal silica gel;

2, the thickness of 0.5mm below the thermal conductivity of silicone film process is complex, relatively high thermal resistance;

3, thermal grease temperature range is greater, thermal grease: -60 ℃ ~ 300 ℃, thermal silicone film: -50 ℃ ~ 220 ℃;

4, the price: thermal grease has been widely used, the price is low, thermal silicone film used in notebook computers and other small and sophisticated electronic products, the price is slightly higher.
IMG_257Generally in the choice of thermal silicone film before, should be considered are: electronic product structure, thermal conductivity, size, thickness, thermal resistance and the expected effect.

1, product structure design choice

In the early stages of structural design of electronic products should be considered to heat the silicone film into the design problem, in different requirements and use of the environment, the cooling program is different, should be combined with the actual situation, choose the optimal cooling program, the design of a reasonable cooling structure , So that the role of thermal silica gel to maximize.

2, thermal conductivity of silicone film thermal conductivity of the choice

The choice of thermal conductivity, a look at what you expect to achieve, the other to see the size of the heat source, as well as the radiator or thermal structure of the design can heat the heat.

According to these needs to select the thermal conductivity of silicone film. Low thermal conductivity of the cost is relatively low, contrary to the effect of high thermal conductivity, but the cost is high.

3, the choice of thermal conductivity of silicone film thickness

The thickness of the electronic products to take into account the use of their own cooling program, if it is to choose the heat dissipation structural parts of the heat, need to consider the thermal structural parts in the contact surface of the morphological structure, in the design of the structure and thermal insulation thickness of the choice of balance. Thickness selection and product hardness, density, compression ratio and other parameters related.

4, thermal silicone film size selection

Thermal film size of the best way is to cover the heat source, breakdown voltage, resistance, surface resistivity, etc. can meet the conditions.

You are welcomed to visit: www.sztensan.com to find the best quality and price thermal silicone pad!

 

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