Graphite thermal conductive sheet is a new type of thermal and heat dissipation material that conducts heat evenly along two sides, shielding heat sources and components while improving the performance of consumer electronics. Graphite heat sinks are divided into natural graphite heat sinks and artificial graphite heat sinks, and the color is generally black. The natural graphite heat sink is obtained by extruding natural graphite, and it has excellent thermal conductivity in the plane of 150-500 W / m-K. Artificial graphite heat sink is a graphite sheet made of graphite material by vacuum high temperature and high pressure sintering. It has better thermal conductivity. The thermal conductivity in the plane can reach 2000 W / m-K, but the price is much higher. The chemical composition of thermally conductive graphite material is mainly a single carbon (C) element, which is a natural element mineral, because carbon is a non-metallic element, but it has the conductivity, thermal conductivity, and shielding properties of metallic materials, as well as polymer plastics. Plasticity, as well as special chemical stability, lubrication, and ability to coat solid surfaces, etc., so thermally conductive graphite has been widely used in many fields such as electronics, communications, lighting, aviation, and defense industry. application. Graphite thermally conductive materials provide new technological solutions for the upgrading of a wide range of electronic products, miniaturization, miniaturization, high integration, and high-performance electronic equipment thermal management industries. Thermally conductive graphite can reduce the weight of the device and provide better thermal conductivity. Natural graphite heat sink

Graphite heat sink application

Graphite thermal conductive sheet is widely used in new energy, LED lighting, electronics, communication equipment, medical equipment, display, touch screen, mobile computer, tablet, etc. due to its high thermal conductivity, high reliability, light weight, easy processing, and environmental protection. Industries that require cooling.

The difference between natural graphite sheet and synthetic graphite:

1. The price of natural graphite sheet is cheap. The price of synthetic graphite is several times that of natural graphite sheet.

2. The thermal conductivity of synthetic graphite is higher than that of natural graphite sheet. The thermal conductivity of natural graphite sheet is 250-600W / m-k. The thermal conductivity of synthetic graphite can reach 1500-2000W / m-k.

3. The thinnest thickness of natural graphite sheet can now be 0.025mm. Our company has been able to produce continuously and supply a large amount. The thinnest thickness of synthetic graphite can be 0.017mm. The two are almost the same in terms of thickness.

4. The artificial graphite sheet is relatively brittle.

Graphite heat sink characteristics

1. Light weight: 30% lighter than aluminum of the same size and 80% lighter than copper, easy to operate.

2. Temperature resistance: The maximum operating temperature can be 550ºC, and the lowest can be lower than -40ºC.

3. High thermal conductivity: The thermal conductivity in the plane is 150 ~ 2000W / mK, which is better than the thermal conductivity of metal.

4. Uniformity: The thermal conductivity of the XY axis is as high as 460 W / mK, which can quickly and uniformly spread the thermal energy from the point heat source to the larger heat dissipation surface, thereby increasing the effective heat dissipation area and achieving the effect of rapid heat dissipation, ensuring that the components are supported Working temperature.

5. Low thermal resistance: The thermal resistance is 40% lower than aluminum and 20% lower than copper.

6. Flexibility: The surface can be combined with other materials such as metal, plastic, stickers, etc. to meet more design functions and needs, increasing design flexibility.

7, ease of use: graphite heat sink can be smoothly attached to any flat and curved surface, and can be cut in any form according to customer needs.

8. Easy to operate: Natural graphite non-gap coils, graphite materials can be laminated and laminated at will, compounded with metal materials, PET film materials and die-cutting.