Metal coating plumbago composite material and method of producing the same

A technology of metal coating and composite materials, which is applied in the direction of metal material coating process, coating, liquid chemical plating, etc., can solve the problems that affect the performance of heat dissipation equipment, the appearance is not very beautiful, and the graphite heat sink is loose, etc., to achieve increase Connection mode and strength, easy implementation, beautiful surface effect

Inactive Publication Date: 2009-08-19
晟茂(青岛)能源替代产品研发有限公司
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  • Description
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  • Application Information

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Problems solved by technology

[0004] At present, in Chinese patent CN1666079A, etc., graphite heat dissipation materials are bonded on metal substrates such as aluminum and copper to form heat dissipation equipment in electronic equipment. However, the application of traditional graphite materials in heat dissipation equipment has the following defects: first appearance It is not very elegant; the second is that the thermal conductivity becomes poor after being connected to the metal substrate. Due to the smooth surface of the graphite product, it is difficult to achieve a close con

Method used

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preparation example Construction

[0035] Preparation of High Thermal Conductivity Graphite Composite Materials

[0036] The preparation method of the graphite composite material can be prepared according to the preparation method of the nano-scale ultra-high conductivity titanium-carbon composite material disclosed in the patent applied by our company (patent application number 200610070469.8). The specific operation of the method is to put quantitatively acidified expanded graphite, flake graphite nano powder, mesophase nano carbon powder and titanium metal nano powder into a high temperature reaction furnace and mix for 2h to 5h to obtain a thick mixed solution which is molded under high temperature and high pressure. Molding, after molding, the material is carbonized and graphitized for 1h to 12h. Among them, the nano-scale ultra-high conductivity titanium-carbon composite material obtained by rolling the thick mixed liquid into flakes in the intermediate production process is the high thermal conductivity ...

Embodiment 1

[0039] 1. Degreasing: use alkaline degreasing liquid to degrease the graphite composite (sheet) material at 50°C, and wash until it is soaked in water; the composition of alkaline degreasing liquid: Na 3 PO 4 : 50g / l; Na 2 CO 3 : 30g / l; NaOH: 25g / l, appropriate amount of soap powder;

[0040] 2. Coarsening treatment: use H 2 SO 4 (80g / l), H 3 BO 3 (260g / l) mixed solution roughens the graphite sheet for 10min;

[0041] 3. Sensitization and activation: using SnCl 2 (30g / l), HCl (60ml / l), a proper amount of mixed solution of metal tin particles soaked at room temperature for 5min; then in 10g / l AgNO 3(Use ammonia water until the solution is clear) The solution is activated by soaking at room temperature for 8 minutes;

[0042] 4. Electroless copper plating: After the graphite composite (sheet) material is activated and washed with water, it is immersed in a solution containing 15g / l CuSO at room temperature. 4 , 60g / l KNaC 4 h 4 o 6 4H 2 A mixed solution of O, 15g / l...

Embodiment 2

[0044] 1. Degreasing: use alkaline degreasing liquid to degrease the graphite composite (sheet) material at 50°C, wash until it is soaked in water; the composition of alkaline degreasing liquid: Na 3 PO 4 : 50g / l, Na 2 CO 3 : 30g / l, NaOH: 25g / l, appropriate amount of soap powder;

[0045] 2. Coarsening: use H 2 SO 4 (80g / l), H 3 BO 3 (260g / l) mixed solution roughens the graphite sheet for 10min;

[0046] 3. Sensitization and activation: using SnCl 2 (30g / l), HCl (60mol / l), a proper amount of mixed solution of metal tin particles impregnated at room temperature for 5min; then in 10g / l AgNO 3 (Use ammonia water until the solution is clear) The solution is activated by soaking at room temperature for 8 minutes;

[0047] 4. Electroless copper plating: After the graphite composite (sheet) material is activated and washed with water, it is immersed in a solution containing 35g / l CuSO at room temperature. 4 , 170g / l KNaC 4 h 4 o 6 4H 2 A mixed solution of O, 60g / l NaOH,...

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Abstract

The invention provides a metal plating (copper or nickel or zinc) graphite compound material and a preparation method thereof. One of the preparation method is degreasing and coarsening the surface of the graphite radiating material; soaking and washing the processed material in sensitizing solution and activating solution; and finally carrying out chemical plating of copper or nickel or zinc and the like in plating solution, drying and post-treatment to obtain the finish product. The other preparation method is carrying out degreasing, coarsening and other pre-processing on the surface of the graphite radiating material before electroplating, and then carrying out electroplating in electroplating solution to obtain the finish product. By both of the preparation methods provided by the invention, whether chemical plating or electroplating, a graphite board material which can beautify the graphite cooling plate, improve the strength of the graphite cooling plate and add the connecting mode (like welding) of the graphite cooling plate and the metal base material can be obtained. The metal plating graphite compound material has the characteristics of low density, high heat conductivity and strength, and easy joining with metals, is an outstanding radiating material, and can be widely used in thermal management systems of electronic products.

Description

field of invention [0001] The invention relates to a graphite composite material, in particular to a graphite composite sheet or plate with a metal-coated surface and a preparation method thereof. Background technique [0002] During the use of electronic components, due to the heat generated inside the components, which cannot be dissipated, it is easy to cause relatively extreme temperatures in the system and cause damage to the devices themselves. Therefore, electronic components generally only work effectively within a certain threshold temperature range. These Overheating of electronic components not only impairs their own performance, but also reduces the performance and reliability of the entire system. The progress in the miniaturization of electronic products has increased the complexity of circuit design, thereby increasing the number of electronic components per unit space. Therefore, more effective heat dissipation devices and materials are needed to dissipate th...

Claims

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Application Information

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IPC IPC(8): C04B41/51C23C18/18C23C18/31C23C18/40C23C18/36C23C18/52C25D3/38C25D3/12C25D3/22
Inventor 耿世达
Owner 晟茂(青岛)能源替代产品研发有限公司
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