Thermal interface materials mainly include the following types:
Thermal grease: This is a paste material made of silicone oil as the base oil, metal oxide fillers and various functional additives. It has good thermal conductivity and low thermal resistance, and is suitable for high-power heating components and radiators. However, thermal grease has the problem of oil seepage and drying after long-term use, and cannot bridge the height tolerance.
Thermal gasket: Thermal gasket is a highly soft and compliant material that can fill the gap between heating components and radiators, improve heat transfer efficiency, and has insulation and shock absorption effects. It has good thermal conductivity and pressure resistance insulation, but the production cost is high and the thermal resistance is relatively large.
Thermal gel: Thermal gel is made of silicone resin as the base material, with thermal conductive fillers and bonding materials added. It can bridge large height tolerances and has high compressibility and low thermal resistance. However, the use of thermal gel requires a dispensing machine, and the initial investment cost is high.
Thermal conductive graphite sheet: This material is obtained by chemical methods under high temperature and high pressure. It has high thermal conductivity and is thin and light, and is suitable for consumer electronic products. However, it is not insulated, and the material is brittle, and the loss is large during punching.
Thermal conductive potting glue: This material is liquid before curing and has fluidity. It is mainly used for bonding, sealing and coating protection of electronic components. The potting glue needs to be fully cured to realize its use value, improve the insulation capacity and heat dissipation effect of internal components.
Thermal conductive double-sided adhesive: Thermal conductive double-sided adhesive tape has good thermal conductivity and bonding properties, and is suitable for bonding heat sinks to microprocessors and other power-consuming semiconductors. It has low heat resistance and good gap filling performance, but low thermal conductivity.
These materials play a key role in electronic devices, filling the gap between the contact surfaces of two materials, reducing thermal impedance and improving heat dissipation performance. The selection of suitable thermal conductive interface materials needs to be determined according to the needs of specific application scenarios.
