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Liquid metal heat conducting material

A technology of liquid metal and heat-conducting materials, applied in the field of heat-conducting materials, can solve the problems of reduced working efficiency, easy oxidation, and troublesome application of heat-conducting sheets, and achieve the effects of reducing the oxidation rate, maintaining stability in use, and slowing down the oxidation rate

Inactive Publication Date: 2016-12-14
成都博盈复希科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the working environment of the liquid metal heat conduction sheet in the prior art is not vacuum, but exposed to the air environment. Due to the activity of the metal, it is extremely easy to be oxidized.
The working efficiency of the oxidized heat conduction sheet is greatly reduced, so it needs to be replaced frequently, which is very troublesome in application and the replacement cost is high
Moreover, a large number of active metals in the liquid metal, such as gallium and tin, will not only reduce the thermal conductivity of the system after being oxidized, but the metal oxide molecular particles may also form agglomerated particles, which greatly affects the thermal conductivity of the liquid metal material. Sufficient filling in the medium, eventually leading to the failure of the liquid metal thermal conductivity material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A liquid metal heat conducting material, comprising 53.2 parts by mass of lead, 37.4 parts of bismuth, 64.1 parts of aluminum and 7.0 parts of antimony. First take antimony powder in a beaker, weigh lead, bismuth and aluminum in proportion, mix them evenly, heat the mixture to 650°C, and stir at a speed of 800rmp to fully melt and mix to obtain molten liquid metal thermally conductive material. The temperature of the molten liquid metal heat-conducting material is raised to 350°C and cooled naturally to obtain a pre-pressed anti-oxidation liquid metal material, which is rolled by a calender to form a thickness of 0.43 mm. Thin slices, and then use a cutting machine to properly cut the thin slices into liquid metal heat conduction sheets with a size of 42mm×42mm.

[0030] The thermal conductivity of the liquid metal heat conduction sheet is 64W / m·K, and the melting point is 53°C. After 6 months of use, the internal oxygen content is 21% by EDS test.

[0031] The antimo...

Embodiment 2

[0033] A liquid metal heat conducting material, comprising 62.0 parts by mass of gallium, 31.4 parts of indium, 57.7 parts of aluminum and 5.2 parts of antimony. First take antimony powder in a beaker, weigh gallium, indium and aluminum in proportion, mix them evenly, heat the mixture to 650°C, and stir at a speed of 800rmp to fully melt and mix to obtain molten liquid metal thermally conductive material. The temperature of the molten liquid metal heat-conducting material is raised to 350°C and cooled naturally to obtain a pre-pressed anti-oxidation liquid metal material, which is rolled by a calender to form a thickness of 0.43 mm. Thin slices, and then use a cutting machine to properly cut the thin slices into liquid metal heat conduction sheets with a size of 42mm×42mm.

[0034] The thermal conductivity of the liquid metal heat conduction sheet is 73W / m·K, and the melting point is 51°C. After 6 months of use, the internal oxygen content is 18% according to the EDS test.

...

Embodiment 3

[0037] A liquid metal heat conducting material, comprising 63.8 parts by mass of gallium, 51.5 parts of aluminum, 0.10 parts of silver and 3.2 parts of antimony. First take antimony powder in a beaker, weigh gallium, aluminum and silver in proportion, mix them evenly, heat the mixture to 650°C, and stir at a speed of 800rmp to fully melt and mix to obtain molten liquid metal thermally conductive material. The temperature of the molten liquid metal heat-conducting material is raised to 350°C and cooled naturally to obtain a pre-pressed anti-oxidation liquid metal material, which is rolled by a calender to form a thickness of 0.43 mm. Thin slices, and then use a cutting machine to properly cut the thin slices into liquid metal heat conduction sheets with a size of 42mm×42mm.

[0038] The thermal conductivity of the liquid metal heat conduction sheet is 58W / m·K, and the melting point is 46°C. After 6 months of use, the internal oxygen content is 16% according to the EDS test.

...

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Abstract

The invention discloses a liquid metal heat conducting material and belongs to the field of heat conducting material. The liquid metal heat conducting material comprises liquid metal alloy and antimony, and the antimony accounts for two to eight parts by weight. The liquid metal heat conducting material has the characteristics that a protective film can be formed on the surface of liquid metal, oxidation rate of liquid metal heat conducting pieces is slowed down, heat conductivity is high, and performances are greatly superior to silica gel heat conducting pieces.

Description

technical field [0001] The invention relates to a thermally conductive material, in particular to a liquid metal thermally conductive material. Background technique [0002] There will be gaps between the CPU and the heat sink, and it is necessary to fill the gaps with thermally conductive cross-section materials. The heat conduction sheets currently used are mainly made of silica gel heat conduction sheets, graphite heat conduction sheets and liquid metal heat conduction sheets. The heat conduction sheet plays the role of heat transfer at high temperature, which can improve the heat conduction efficiency while filling the pores, making the overall heat dissipation system more excellent. The liquid metal heat conduction sheet is a thin alloy sheet with a low melting point. This metal sheet will melt into a liquid at a high temperature above 47°C. This liquid will fill the air gap in the heat conduction interface with a soft material like silicone grease, so as to achieve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C28/00C22C9/00C22C7/00C09K5/06
CPCC22C21/003C09K5/063C22C7/00C22C9/00C22C28/00
Inventor 楚盛任国钦
Owner 成都博盈复希科技有限公司
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