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A kind of liquid metal thermal paste and preparation method thereof

A technology of liquid metal and heat conduction paste, which is applied in the field of heat conduction paste, can solve the problems of high fluidity of gallium alloy, poor performance of gallium alloy, and influence on service life, etc. Effect

Active Publication Date: 2021-06-04
福建美庆热传科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual use process, there are also many problems, such as gallium alloy is not easy to smear due to its high fluidity; gallium alloy itself has a large surface tension and poor wettability with interface materials, prone to overflow; The alloy is easy to be gradually oxidized by the air, resulting in performance degradation, which affects the service life, etc.

Method used

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  • A kind of liquid metal thermal paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A liquid metal thermal conductive paste, composed of components of weight sharing:

[0022] The gallium indium tin alloy is 70 parts, 6 parts of pyridate, 8 parts of the thermal reinforcing copper powder and 2 parts of the regulator.

[0023] The method of preparing the liquid metal thermant paste described in this example, comprising the steps of:

[0024] The copper powder was placed in a vacuum drying tank in a vacuum drying tank at an 80 ° C for 5 h, and copper powder was added to the molten liquid metal gallium indium tin alloy, gallium pyridate and metallium trichloride, stirring the mixture in a vacuum environment. The temperature was kept above 25 ° C, and the rotation speed was 150 rpm at stirring, the stirring time was 8 min, stirred well, and the liquid metal heat conduction paste was obtained.

Embodiment 2

[0026] A liquid metal thermal conductive paste, composed of components of weight sharing:

[0027] The gallium indium tin alloy is 80 parts, 2 parts of pyridate, 5 parts of the thermal reinforcing copper powder and 3 parts of the regulator.

[0028] The method of preparing the liquid metal thermant paste described in this example, comprising the steps of:

[0029] The copper powder was placed in a vacuum drying tank at a vacuum tank at a vacuum tank at a vacuum drying tank, and copper powder was added to the molten liquid metal gallium indium tin alloy, gallium pyridate and metallium trichloride, stirring the mixture in a vacuum environment. The temperature was kept above 25 ° C, and the rotational speed was 200 rpm at stirring, the stirring time was 5 min, stirred well, and the liquid metal heat transfer paste was obtained.

Embodiment 3

[0031] A liquid metal thermal conductive paste, composed of components of weight sharing:

[0032] The gallium indium tin alloy is 60 parts, 8 parts of pyridic acid, 10 parts of the thermal reinforcing copper powder and 1 part of the regulator.

[0033] The method of preparing the liquid metal thermant paste described in this example, comprising the steps of:

[0034] The copper powder was placed in a vacuum drying tank at an 80 ° C vacuum drying tank for 6 h, and copper powder was added to the molten liquid metal gallium indium tin alloy, gallium pyridate, gallium tartride, and mixed mixture in a vacuum environment. The temperature was kept above 25 ° C, and the rotation speed was 100 rpm at the time of stirring, the stirring time was 10 min, stirred well, and the liquid metal heat conduction paste was obtained.

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Abstract

The invention relates to a liquid metal thermal paste and a preparation method thereof. The liquid metal thermal paste comprises the following components in parts by weight: 60-80 parts of gallium indium tin alloy, 2-8 parts of gallium picolinate, 5-10 parts of heat conduction enhancer and 1-3 parts of regulator. During preparation, the components are mixed according to the proportion. The liquid metal heat-conducting paste of the present invention has the characteristics of high thermal conductivity, moderate viscosity, easy application, no evaporation leakage, no easy oxidation failure, and long service life.

Description

Technical field [0001] The present invention belongs to the field of thermal conductive paste, and more particularly to a liquid metal thermal conductive paste and a preparation method thereof. Background technique [0002] Liquid metal thermal conductive paste is a high-end thermal interface material having a thermal conductivity that is far super conventional thermally conductive silicone, and the heat transfer effect is remarkable. Common liquid metal thermally conductive pastes are gallium-based alloys, due to their low melting point, liquid in normal temperature, is suitable for use as a thermal interface material. However, in the actual use, there are many problems, such as gallium alloys because of their fluidity is not easily applied; the gallium alloy itself is poor, and the wettability is poor, and it is easy to overflow. The alloy is easy to gradually be decreased by air oxidation, and affecting the service life. Therefore, looking for a proper viscosity, good to the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/12C09K5/14
CPCC09K5/12C09K5/14
Inventor 林永胜
Owner 福建美庆热传科技有限公司
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