Views: 504 Author: Site Editor Publish Time: 2024-01-02 Origin: Site
Graphite film is one of the main materials of heat dissipation scheme, with high thermal conductivity, high specific heat capacity and low density. Compared with copper and aluminum and other metals has better thermal conductivity, the main reason is that graphite has a special hexagonal plane network structure, which can evenly distribute heat in a two-dimensional plane and transfer it effectively. The specific heat capacity of graphite is comparable to that of aluminum, about twice that of copper, which means that after absorbing the same heat, the temperature of graphite is only half that of copper. The density of graphite is only 0.7 to 2.1g/cm3, which can be lightweight and can be smoothly adhered to any flat and curved surface. At present, the mainstream heat dissipation film has natural graphite film, synthetic graphite film and nano carbon film. Since 2009, graphite has been used in consumer electronics products in bulk, and in 2011, it has been applied to smartphones on a large scale, and has now replaced traditional metals and become the mainstream heat dissipation material in the field of consumer electronics.
Among them, the natural graphite sheet is a flake material made of natural graphite after crushing, screening, drying, roasting and other processes, and is an important natural graphite product. Its appearance is black or gray, with good electrical conductivity, thermal conductivity, lubrication and corrosion resistance, is widely used in battery anode materials, electronic materials, wear-resistant materials, sealing materials, refractory materials and other fields.
Artificial graphite film is made of polyimide (PI film) after carbonization and graphitization, is the current thinnest heat dissipation film material, the thinnest can be 0.01mm, widely used in mobile phones, computers and other intelligent terminal products. Artificial graphite film is mainly used in smart phones, the amount depends on the performance and requirements of the phone, about 3-6 pieces, the components used include lens, CPU, OLED display, WiFi antenna, wireless charge and battery.
Thermal graphite effectively solves the thermal design problem of electronic equipment by providing better thermal conductivity while reducing the weight of the device. Dasen thermal graphite is widely used in PDP, LCD TV, Notebook PC, UMPC, Flat Panel Display, MPU, Projector, Power Supply, LED and other electronic products.