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LED lighting cooling special materials -the use range and methods of soft silicone thermal conductivity

LED lighting cooling special materials -the use range and methods of soft silicone thermal conductivity

A.LED industry instructions

Thermal silica gel is used between aluminum substrate and heat sink

Description: This picture shows the use of thermal silica gel high-power LED. Figure above for the aluminum plate (heating element) red arrow refers to the sheet thermal silica gel. Thermal silica gel below the heat sink or aluminum plate. Thermal silica gel is the role of the work of the aluminum plate heat transfer to the bottom of the heat sink or aluminum substrate.

But the peer also used thermal conductivity of grease to heat. The following is a comparison of thermal silica gel with thermal grease:

 

① thermal conductivity: soft thermal conductivity of silicone pads and thermal grease thermal conductivity, respectively, 1.9-3.0w / m.k and 0.8-3.8w / m.k.

② insulation: thermal grease added by the metal powder insulation is poor, soft thermal insulation silicone pad insulation performance .1mm thickness of the electrical insulation index above 4000 volts.

③ shape: thermal grease for the gel-like, soft thermal conductivity of silicone pad for the sheet.

④ use: thermal grease should be carefully applied to the heart (in case of large size more inconvenient to apply), easy to dirty around the device caused by short circuit and scratch electronic components; soft thermal silicone pad can be any cutting, tear off the protective film directly Paste, tolerance is very small, clean, save labor costs.

⑤ thickness: as a filler gap thermal conductivity materials, thermal grease limited, soft thermal silicone pad thickness ranging from 0.5-10mm, a wide range of applications.

⑥ thermal effect: the same thermal conductivity of the thermal grease than thermal silica gel is better, because the heat resistance of small thermal grease. So to achieve the same thermal effect, thermal conductivity of silicone thermal conductivity must be higher than the thermal grease.

⑦ easy to re-install, and thermal grease after disassembly and re-smearing inconvenient.

⑧ price: thermal grease has been widely used, the price is low. Soft thermal silicone pad more used in notebook computers and other small and sophisticated electronic products, the price is slightly higher.

 

§Thermal silica gel used in aluminum plate between the shell

Description: This figure shows the use of thermal silica gel high-power LED diagram. Figure above for the aluminum plate (heating element) green arrows referred to as sheet thermal silica gel. Thermal silica gel below the bottom of the LED shell schematic. Thermal silica gel is the role of the work of the aluminum plate heat to the bottom of the LED lights on the shell.

Thermal silicone film in high-power LED, backlight and other industries mainly focus on the following aspects:

 

1. Large area requires thermal conductivity, large area, the use of thermal conductivity thermal grease (or thermal paste) smear inconvenient.

2. Long strip area of heat dissipation. Such as: length 400 * wide 4mm such a size using thermal grease (or thermal paste) easy to apply to the product outside

3. High and low, the use can not be filled with heat, it should also use thermal silica film to heat.

4. Small size requires heat, it should also use thermal silica film to heat.

5. If the cost of the product is not strict or requires easy operation, the thermal silicone film is also the preferred material.

 

B.the application of power products

The use of power supply products in addition to the IC also used in the following components: such as, PFC inductors, transformers, capacitors, because the above electronic components and the surface is high and the surface is circular (not flat), it must be used Solid state of the thermal conductivity of materials (which thermal silica gel is one of the very good thermal conductivity material).

 

 

We can provide thermal grease and thermal Pad for you, for more product information, you are welcomed to visit: www.sztensan.com.

 

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