Thermal conductive silicone companies share four performance parameters of thermal conductive silicone.
Thermal conductive grease, also known as thermal paste, thermal grease, silicone grease, or thermal compound, is a paste-like substance made from organic silicon-based thermal materials. It features excellent thermal conductivity, is environmentally friendly and odorless, has electrical insulation properties, and can endure extreme temperatures. It exhibits high stability without curing at high temperatures, remains paste-like, is non-toxic, and is safe for the human body. Its compatibility with materials such as plastics and metals poses no corrosion or swelling issues. With a low oil separation rate, it is safe for use in electronic and electrical products. As a medium for transferring heat between heating elements and heat sinks, thermal conductive grease plays a vital role in dissipating heat and filling gaps. It effectively and persistently transfers heat away.
Thermal conductive silicone companies analyze these performance parameters as follows:
- Thermal Conductivity Coefficient (Thermal Conductivity)
The thermal conductivity coefficient of thermal conductive grease is essentially the same as that of a heat sink. Measured in W/mK, it represents the amount of heat transferred along a 1-meter section of a cylindrical body with a cross-sectional area of 1 square meter when the temperature difference is 1 Kelvin (1K=1°C). A higher value indicates faster thermal transfer and better thermal performance. Currently, mainstream thermal conductive greases have a thermal conductivity coefficient greater than 1.05 W/mK, making it an important indicator for evaluating the parameters of such greases.
- Thermal Resistance Coefficient
The thermal resistance coefficient indicates how much a material impedes thermal transfer. It resembles the concept of electrical resistance, with similar units (°C/W), representing the temperature difference across the thermal conduction path when a continuous heat transfer power of 1W is applied. A lower thermal resistance is preferable, as it means that for the same environmental temperature and thermal power, the temperature of the heating object will be lower. The size of the thermal resistance is significantly influenced by the materials used in thermal conductive grease, with the silicone company sourcing high-quality raw materials.
- Dielectric Constant
The dielectric constant is a crucial parameter related to the risk of short circuits in computers or electronic products. Most typical thermal conductive greases use materials that possess good insulation. However, some specialized greases (e.g., those containing silver) may exhibit some conductivity. Many modern CPUs come with a metal lid for heat transfer and core protection, mitigating concerns about short circuits due to grease overflow. Currently, the dielectric constant of mainstream thermal conductive greases is greater than 3.2.
- Operating Temperature
The operating temperature is essential to ensure the thermal conductive grease remains in either solid or liquid form. If the temperature is too high, the material turns liquid; if it’s too low, it may become solid due to increased viscosity. Both scenarios are detrimental to heat dissipation. Typically, the operating temperature of thermal conductive grease ranges from -50°C to 200°C. Most electronic products operate within this temperature range.
Thermal conductive silicone companies specialize in producing and selling thermal conductive grease, thermal paste, thermal compound, thermal silicone, thermal adhesives, thermal silicone rubber, electronic silicone, high-temperature silicone, and power supply silicone. Their products are reliable and environmentally friendly, offering free sample services and technical consultation, along with related alternatives to imported silicone greases and gels.
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