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What are the important indicators of thermal grease?

Thermal conductive silicone is also called heat paste, cooling oil, silicone grease, thermal paste, belonging to organic compound into a paste of silicon thermal conductive materials, has good thermal conductivity, environmental protection, tasteless, electrical insulation and the characteristics of high and low temperature resistance, high stability, high temperature curing, slurry, do not contain toxic, harmless to human body, it has good compatibility with plastic, metal and other materials, no corrosion, swelling,Low oil release, can be safely used in electronic and electrical products.As the heat transfer medium of heating element and radiator, thermal silicone grease can play the role of cooling and filling.They transfer heat efficiently and consistently.

Thermal grease performance depends on what indicators?Yao Neng engineers to analyze these problems with you:

1. Thermal conductivity coefficient (thermal conductivity)

The heat conduction coefficient of thermal grease is basically the same as that of radiator, and its unit is W/mK, that is, the heat conduction power when the temperature difference between a column with a cross-sectional area of 1 square meter along the axial direction is 1 Kelvin (1K=1).The higher the value is, the faster the heat transfer rate and the better the thermal conductivity of the material are.At present, the thermal conductivity of the mainstream silicone grease is greater than 1.0W/mK, and the thermal conductivity is an important indicator to measure the parameters of silicone grease.

2. Thermal resistance coefficient

Thermal resistance coefficient represents the obstruction effect of an object on heat conduction.The concept of thermal resistance is very similar to resistance, and the unit is similar (/W), that is, the temperature difference between the two ends of the thermal conduction path when the continuous heat transfer power of the object is 1W.Obviously, the lower the thermal resistance, the better, because the same ambient temperature and thermal power, the lower the thermal resistance, the temperature of the heating object is lower.The size of thermal resistance and the selection of thermal silicone grease material has a great relationship, thermal silicone grease raw materials are selected high quality raw materials.

3. Dielectric constant

Dielectric constant is a very important parameter, which is related to whether there is a short circuit in the computer or electronic products.Ordinary thermal silicone grease is used for good insulation materials, but some special silicone grease (such as silvering silicone grease) may have a certain conductivity.Many cpus are now equipped with metal caps for heat conduction and protection of the core, so there is no need to worry about thermal grease spillovers and short circuit problems.At present, the dielectric constant of thermal grease used in the mainstream heat sink is greater than 3.2.

4. Working temperature

The working temperature is an important parameter to ensure that the thermal silicone grease is in solid or liquid state. If the temperature is too high, the thermal conductive material will be transformed into liquid state.If the temperature is too low, it will become solid due to increased viscosity, which is not conducive to heat dissipation.The operating temperature of thermal grease is generally between -50 and 200.As for the working temperature of thermal silicone grease, the working temperature of most electronic products will not exceed this temperature range.


Shenzhen yaoneng technology co., LTD., specializing in the production and sale of thermal conductivity silicone grease, thermal paste, thermal conductive silicone, high temperature thermal conductive adhesive, thermal silica gel, silica gel, silica gel, power supply such as silica gel, reliable product quality, product environmental protection, can provide free samples for customer service and technical consulting, and related to replace the imported silicone and silicone products.Welcome to sample and choose thermal thermal grease.