Thermal grease coefficient 3.0- The role of thermal grease

Thermal conductive silicone grease is a kind of high thermal insulating silicone material, also known as heat dissipating paste and thermal conductive paste. It has good thermal conductivity, temperature resistance and insulation properties, and is one of the most ideal "heat transfer" dielectric materials for heat-resistant devices. Thermal grease has high thermal conductivity, excellent thermal conductivity, good electrical insulation (only for insulating thermal grease), wide use temperature, good use stability, low consistency and good construction performance.

During the installation of the computer, silicone grease is often used to connect the CPU and the CPU fan heat sink, which can make the back of the CPU perfectly fit and connected to the heat dissipation surface to help the CPU better heat dissipation.

 

The role of thermal grease

Thermal grease is a material used to fill between heat conduction media, its role is to improve the conduction efficiency of heat, so that heat can be transferred and distributed more effectively.

Specifically, thermal grease is often used in the computer field between the CPU and the heat sink. Its functions are as follows:

1. Fill the gap: the surface of the CPU and radiator may have small bumps or irregularity, which will lead to uneven contact area and affect the conduction of heat energy. Thermal grease can fill these tiny gaps and increase the contact area, thereby reducing the resistance of heat conduction.

2, improve the thermal conductivity: thermal grease has good thermal conductivity, can effectively transfer heat from the CPU to the heat sink. Compared with air, thermal grease has higher thermal conductivity and heat conduction efficiency, which can transfer heat energy to the radiator more quickly and improve the heat dissipation effect.

3, fill the air gap: thermal grease can also fill the small air gap between the CPU and the radiator, to prevent the accumulation of air generated thermal resistance. Air is a poor conductor of heat, which impedes the conduction of heat. After filling the air gap, thermal grease can reduce or avoid the influence of air on heat conduction and improve the heat dissipation effect.

Technical parameters (AtTA =25℃)

Argument Symbol

Test standard

Performance index

Cone penetration 1/10mm25℃

/

ASTM D217

240~340

Oil dispersion 150℃.24h%

/

HG/T 2502

≤0.1

Volatile content (150℃, 24h) %

/

HG/T 2502

≤0.1

Dielectric strength kV/mm

eo

GB/T 1695

≥20

Dielectric constant 1.0MHz

ε

GB/T 1693

2.5

Volume resistivity Ω·cm

ρ

GB/T 1692

≥2.0×1015

 

Limit parameter (AtTA =25℃)

Argument

Symbol

Numerical value

Unit

Thermal conductivity

λ

1.5~2.0

W/m·K

Specific gravity

s.g.

2.5~2.7

g/cm³

Operating temperature

TOPR

-20°C To +260°C

Storage temperature

 TSTG

 10°C To +25°C 

 

Use method and precautions of thermal grease

The adhesive sealing surface should be clean, the top of the nozzle should be cut off and sealed according to the dosage, put it on the packaging mouth, apply it to the construction surface (thickness should not exceed 6mm), and put it in the air. The surface of this product can lose its adhesive shape (surface dry) at room temperature for 3-10 minutes, and it will be completely cured after 24 hours. The heating of this product can not significantly change its curing speed.

Unused adhesive material should be sealed and stored. When used again, if there is a little crust at the seal, it can be removed without affecting normal use. Glue in the storage process, the nozzle may also appear a small amount of curing phenomenon, can be removed after normal use, does not affect the performance of the product. The storage period is 6 months (25℃).

This product is non-dangerous goods, but do not import and eye.

This product cannot be mixed with other types of colloids!

 

Requirements for packaging, storage and transportation of thermal grease

Transportation: Domestic (CN-GB), international (IMO, IATA, UN) no regulations. They are non-dangerous goods.

Packaging:

① The packaging of the material has a certain protective and sealing effect on the material to ensure that the material is not damaged during transportation.

② The packing box should have the product model, name, quantity and the manufacturer's trademark, production batch and other information.

③ The packing box should meet the requirements of moisture, shock, pressure and mildew.

Storage: Packaged products should be stored in a cool and dry environment below the ambient temperature of 26 ° C, and there should be no acid and alkali in the surrounding air

Sexual or other corrosive gases, under the above conditions, can be stored for six months from the date of production, during which the material is still qualified.

Packing specifications: 50ml aluminum tube, 330mlPE tube

 

Statement

Before using this product, users must carefully read the relevant information of this product, and users have the responsibility to conduct comprehensive tests according to their respective uses to confirm its performance, effect, safety, etc.

Our company disclaims any other warranty stated or implied. If your company does not do the corresponding performance test and direct use of the product caused by unqualified products, the company and the intermediary sales legal person shall not bear any responsibility, hereby declare!

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