Pitch coke-based process for preparing high-strength electrical and thermal conductive graphite flake
A heat-conducting graphite sheet, electrical and heat-conducting technology, which is applied in the direction of modification, cooling/ventilation/heating transformation, and sieving by conduction and heat transfer. Insufficient refinement and other problems, to achieve the effect of improving the crystal forming effect, improving the effect, and improving the efficiency of the back glue
Active Publication Date: 2017-01-04
信骅(上海)器材有限公司
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Problems solved by technology
[0003] Thermally conductive graphite sheets are non-metallic materials, but have the same or even higher thermal conductivity and electrical conductivity than metals, and their thermal conductivity is stronger than that of aluminum foil or copper foil, but thermally conductive graphite sheets are produced in the existing production process. The electrical conductivity and thermal conductivity are relatively optimal, mainly in the processing stage of the raw material and the calcination stage. In the prior art, the processing of the raw material of the thermally conductive graphite sheet is not refined enough, resulting in more impurities in the raw material, making the final produced The quality of the thermally conductive graphite sheet is not high enough, the pass rate will be reduced, and it will affect its better arrival and thermal conductivity
Method used
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Experimental program
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Effect test
Embodiment Construction
[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below in conjunction with embodiments.
[0030] The process for preparing high-strength conductive and thermally conductive graphite sheets based on pitch coke comprises the following steps:
[0031] 1) Material preparation: select pitch coke as the raw material of thermally conductive graphite sheet;
[0032] 2) Primary crushing: the above-mentioned pitch coke is pre-crushed to a medium particle size of 60-80 mm by crushing equipment. Because the carbonaceous raw material particles are too large, not only the quality after calcination cannot be guaranteed during the calcination process, but also affected by the calcination equipment , causing difficulties in feeding and discharging, and ensuring that deep calcination can be realized in the follow-up;
[0033] 3) Iron removal: the cru...
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Abstract
The invention discloses a pitch coke-based process for preparing a high-strength electrical and thermal conductive graphite flake. The process comprises the following steps: (1) preparing materials; (2) grinding for the first time; (3) removing iron; (4) calcining at high temperature; (5) cooling; (6) grinding for the second time; (7) screening; (8) mixing; (9) pressing and heating; (10) graphitizing at high temperature and (11) cutting. The processing process has scientific and reasonable steps, the processing process in the prior art is improved, and raw materials are refined, so that the graphite flake has uniform granularity, the yield of finished products is improved, the electrical conductivity and thermal conductivity of the thermal conductive graphite flake can be improved, the chemical stability of the graphite flake can be improved, and the thermal expansion of the graphite flake can be reduced. The high-strength electrical and thermal conductive graphite flake can be easily processed and molded.
Description
technical field [0001] The invention relates to a thermally conductive graphite sheet used in the field of electronic products, in particular to a process for preparing a high-strength conductive and thermally conductive graphite sheet based on pitch coke. Background technique [0002] Thermally conductive graphite sheet is a brand-new heat-conducting and heat-dissipating material. It conducts heat evenly along two sides, shields heat sources and components, and improves the performance of consumer electronics products. The color is generally black, and the material is finely processed natural graphite. The thermal conductivity is in the horizontal direction. Up to 1500W / M-K, using IC, CPU, MOS, LED, heat sink, LCD-TV, notebook computer, communication equipment, wireless switch, DVD, handheld device, etc. [0003] Thermally conductive graphite sheets are non-metallic materials, but have the same or even higher thermal conductivity and electrical conductivity than metals, a...
Claims
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IPC IPC(8): B32B9/00B32B9/06B32B37/12C01B31/04H05K7/20B03C1/02B07B1/00B32B38/00
CPCB03C1/02B07B1/00B32B9/007B32B9/06B32B37/1284B32B38/004B32B2307/202B32B2307/302H05K7/2039
Inventor 汪劲松王鸣蔡森毛明权
Owner 信骅(上海)器材有限公司