The thermal materials for 5G
The thermal materials in the 5G era is getting more and more important, one of the significant features of the 5G era is the significant increase in heat. As the power consumption of electronic equipment increases, the requirements for heat dissipation are more stringent, and the application of thermal materials is also wider.
The thermal solution of electronic equipment are mainly active heat dissipation and natural heat dissipation.
Active heat dissipation is a compulsory heat dissipation with dynamic components, including air forced cooling, indirect liquid cooling and direct liquid cooling. It is generally used in high -power and relatively large electronic equipment.
Natural heat dissipation is a heat dissipation method without power elements. It mainly relies on non -power materials and devices for heat transfer. It is widely used in mobile phones, tablets, smart watches, outdoor base stations, etc. Natural heat dissipation is the main heat dissipation method of electronic devices. The heat dissipation materials used mainly include heat -conductive interface materials, graphite pieces, heat pipe/VC, etc.
1. Thermal interface material
The heating interface material is an indispensable high -efficiency thermal conductivity between the thermal device and the radiator. It is mainly used between the system thermal interface. By filling the rough combination surface, the heating coefficient is much higher than the heat interface material that is much higher than the air. The heat dissipation efficiency. Common thermal conductivity interface materials include heat -conducting silicon grease, thermal conductivity, thermal conductivity change material, thermal conductivity (water), thermal tape, thermal gel, etc.
2. Graphite
Multi -layer graphite is the current mainstream heat dissipation method. Graphite is a good thermal conductivity, which exceeds various metal materials such as steel, iron, and lead. The working principle of graphite tablets is to use its characteristics of excellent thermal conductivity in the horizontal direction (good performance graphite sheet thermal conductivity can reach 1500-1800W/m · k, and the general pure copper thermal conductivity is 380W/m · K, the height conduction coefficient is conducive to the diffusion of heat), which can quickly reduce the temperature of the heating element in the work of electronic products, make the temperature of the electronic product even uniformly, and improve the work stability and service life of electronic products. Graphite pieces are most widely used in consumer electronics heat dissipation.
Graphene is a two -dimensional crystal that is peeled from graphite materials and consisting of carbon atoms with only one layer of atomic thickness. Graphene materials are also considered to be a cooling material with strong heat -conducting characteristics, fast heat dissipation characteristics (with air convection), and light and flexibility. Due to the high cost, graphene has not yet been used in large scale.
3. Heat pipe and Vapor chamber
The heat pipe and the Vapor Chamber are the commonly used heat dissipation reinforcement component in electronic products. The thermal coefficient is very high and widely used in high-power or high-integrated electronic products.
The working principle of heat pipe and VC is based on the phase change. Both heat pipes and VC are vacuum cavity, and the internal medium (such as water) is filled. The phase variable material in the cavity changes from liquid to gas absorption heat. When the gas touch the area with a lower temperature, the liquid is condensed to release heat, The liquid through the capillary structure flowing back to the heating area, circulating and remove the heat. The heat pipe has only a single direction "linear" effective thermal conductivity, and VC is equivalent to the upgrade from "line" to "surface", which can pass the heat to the surroundings, and the VC has a large heat plate area, which can cover more heat sources. Therefore, VC has higher heat dissipation efficiency than heat pipes.
Sinda Thermal is professional thermal expert, we are offering many thermal solutions and heat sinks to the global customers, we can design the optimized performance heat sinks and manufacture them in house, our factory owns over 100 employees and many precise facilities and equipment. Please contact us freely if you have any thermal requirements.
