Introduction and Understanding of New Thermal Conductive Materials

With the rapid development of the electronics industry in the past decade, the degree of integration of electronic devices has been increasing, which has brought about greater thermal effects. If the equipment does not have good heat dissipation, it will seriously affect the service life of the equipment, bring hidden dangers such as unstable operation and partial functional failure. Data shows that for every 2 ℃ increase in electronic components, the overall reliability of the equipment decreases by 10%.

Due to the presence of surface roughness, when electronic devices are directly attached to heat sinks, the actual contact area is only 1% -2%; Because the thermal conductivity of air is only 0.023W/mk, a large proportion of air gaps is a fatal defect in thermal conductivity, and interface materials can significantly reduce the interface thermal resistance Rc. Therefore, good thermal management design and appropriate thermal interface materials (TIM) are important guarantees for the long-term stable operation of electromechanical equipment.

The market hot interface materials generally includeThermal pad, thermal conductive gel, thermal conductive silicone grease, phase change materials, etc. Different types of performance and construction conditions vary. To meet the requirements of mechanical and electrical equipment for thermal conductivity and reliability, it is necessary to compare and analyze the existing thermal interface materials and select suitable thermal conductivity materials.

Do you know what new thermal conductive materials are available?

The new thermal conductive materials include the following:

1. Graphite is a very durable and low-cost materialThermal conductive materialUsually used for heat dissipation in electronic devices.

2. Silicone is a widely used thermal conductive material with good elasticity and durability, while also being cost-effective.

3. Polymer materials such as poly (butyl rubber) and poly (vinyl rubber) can also be used as thermal conductive materials, and are popular due to their high elasticity and thermal properties.

4. Metals such as aluminum, copper, and zinc can also be used as thermal conductive materials, but are limited by their high cost and environmental impact.

5. The combination of composite materials such as rubber and metal can improve thermal conductivity, but it also brings environmental problems.