Electricity-insulation heat-conduction powder and material, and preparation methods thereof

An insulating and heat-conducting, powder technology, applied in insulators, heat-exchange materials, chemical instruments and methods, etc., can solve the problems of impractical heat conduction, expensive diamond cost, difficult processing, etc., and achieve the effect of high thermal conductivity

Active Publication Date: 2014-06-18
SHENZHEN BAROY NEW MATERIAL TECH CO LTD
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Problems solved by technology

However, because diamond is very expensive and difficult to process, it is n

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  • Electricity-insulation heat-conduction powder and material, and preparation methods thereof

Examples

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Example Embodiment

[0025] Example 1

[0026] This embodiment provides an insulating and thermally conductive powder. The insulating and thermally conductive powder includes micron-level graphite intercalation composite particles with a particle size ranging from 50 μm to 100 μm. The microstructure of the graphite intercalation composite includes a plurality of graphite crystals. Grains, nano-scale thermally conductive insulating metal oxides distributed between the carbon atom layers of a single graphite crystal grain and distributed in the gap between two graphite crystal grains, the graphite crystal grains are the matrix, such as figure 1 As shown, the gap between the carbon atom layers 111 of a single graphite crystal grain 11 is filled with nano-scale alumina 12, and the average thickness of the nano-scale alumina is 0.05 nm, which is distributed in the gap 13 between the two graphite crystal grains. The average thickness of the nano-scale alumina is 10nm (not shown in the figure). The graphite...

Example Embodiment

[0029] Example 2

[0030] This embodiment provides an insulating and thermally conductive powder. The insulating and thermally conductive powder includes micron-level graphite intercalation composite particles and micron-level alumina powder. The average particle size of the graphite intercalation composite particles is 10 μm. The average particle size of the micron-sized alumina powder is 1 μm. The microstructure of the graphite intercalation composite includes multiple graphite crystal grains, distributed between the carbon atom layers of a single graphite crystal grain, and distributed between two graphite crystal grains. Nano-scale thermally conductive insulating metal oxide in the gap, the graphite grains are the matrix, such as figure 1 As shown, the gap between the carbon atom layers 111 of a single graphite crystal grain 11 is filled with nano-scale alumina 12, and the thickness of the nano-scale alumina 12 is 0.34 nm, which is distributed in the gap 13 between two graphi...

Example Embodiment

[0033] Example 3

[0034] This embodiment provides an insulated thermally conductive powder, which includes nano-scale graphite intercalation composite particles and nano-scale titanium oxide. The graphite intercalation composite particles have an average particle size of 500 nm. The microstructure of the intercalation composite is composed of a plurality of graphite crystal grains, a nano-scale thermally conductive insulating metal oxide distributed between the carbon atom layers of a single graphite crystal grain, and a gap between two graphite crystal grains. The graphite crystal grains are Matrix, such as figure 1 As shown, the gap between the carbon atom layers 111 of a single graphite crystal grain 11 is filled with nano-scale titanium oxide 12, the average thickness of the nano-scale titanium oxide is 0.08 nm, and is distributed in the gap 13 between the two graphite grains. The average thickness of the nano-sized titanium oxide is 50nm (not shown in the figure), except f...

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Abstract

The invention relates to an electricity-insulation heat-conduction powder, an electricity-insulation heat-conduction material based on the electricity-insulation heat-conduction powder, a preparation method of the powder, and a preparation method of the material. The electricity-insulation heat-conduction powder comprises graphite intercalation compound particles, the microstructure of the graphite intercalation compound particles comprises a plurality of graphite crystal grains, and a nanometer heat-conduction electricity-insulation metal oxide distributed between carbon atom layers of single graphite intercalation compound particles, and the surface of the graphite intercalation compound particles is coated with a heat-conduction electricity-insulation metal oxide. The graphite intercalation compound particles in the electricity-insulation heat-conduction powder prepared through the preparation method of the powder have the characteristics of electricity insulation and heat conduction. The electricity-insulation heat-conduction powder has a high heat conductivity and an electricity insulation characteristic, and is very suitable for preparing heat conduction plastics, heat conduction rubber, heat conduction materials and the like.

Description

【Technical field】 [0001] The invention relates to an insulating and heat-conducting powder, an insulating and heat-conducting material based on the insulating and heat-conducting powder, and a preparation method thereof. 【Background technique】 [0002] More than 55% of the clapping of electronic components is caused by the temperature rise during operation, so the heat dissipation of electronic components is very important, and if the heat dissipation effect of electronic components is to be good, it is necessary to use very good thermal conductivity materials to conduct heat on the electronic components to other cooling devices. Among the many heat-conducting materials, the thermal conductivity of diamond is 5 times that of copper at room temperature. At the same time, diamond also has excellent properties such as non-magnetic and poor electrical conductivity. Therefore, theoretically, diamond is very good for electronic components. of thermally conductive materials. Howe...

Claims

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Application Information

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IPC IPC(8): C09K5/14H01B17/60H01B17/64C08L101/00C08L21/00C08K9/10C08K3/04C08K3/22C09D7/12C09D5/25
Inventor 胡军辉刘建州
Owner SHENZHEN BAROY NEW MATERIAL TECH CO LTD
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