A kind of high thermal conductivity silicone grease interface material and preparation method thereof

An interface material and high thermal conductivity technology, which is applied in the field of thermal conductivity materials, can solve the problems of not meeting the thermal control requirements of high-density stand-alone machines, the separation of base materials and thermal conductivity fillers, and the ineffective conduction of heat, so as to inhibit the possibility of degradation and reduce the content , Reduce the effect of oil separation and evaporation

Active Publication Date: 2021-09-17
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the very low thermal conductivity of air, the large amount of heat generated by the heat source cannot be effectively conducted out
On the other hand, the fastening process of some stand-alone assembly produces local stress, which causes local deformation of the installation contact surface, further increases the contact gap, and thus aggravates the degree of poor thermal contact
[0004] At present, the commercially available thermal grease generally has some shortcomings, such as low thermal conductivity, easy separation of base material and thermal filler, serious oil leakage, and easy "oil creeping" phenomenon, which cannot meet the thermal control requirements of the new generation of high-density stand-alone , also poses a threat to the security of the device

Method used

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  • A kind of high thermal conductivity silicone grease interface material and preparation method thereof
  • A kind of high thermal conductivity silicone grease interface material and preparation method thereof
  • A kind of high thermal conductivity silicone grease interface material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: High thermal conductivity silicone grease GDZ-1

[0040] ① Coat the thermally conductive filler aluminum powder and silver powder with a layer of silane coupling agent: surface-treat thermally conductive aluminum powder and silver powder with different particle sizes, and silane coupling equivalent to 1% to 2% of the mass of the filler aluminum powder and silver powder Dissolve the agent KH570 in absolute ethanol, stir to dissolve it, weigh the preset mass of filler aluminum powder and silver powder, put them into the silane coupling agent solution respectively, use the powder coating equipment, stir at 60°C for 3 hours, take it out and let it stand , after suction filtration, take the filter and wash with absolute ethanol for 3 times, and dry at 80°C for 24 hours to obtain thermally conductive aluminum powder and silver powder coated with a layer of silane coupling agent on the surface;

[0041] ② Match the particle size of the heat-conducting aluminum powde...

Embodiment 2～6

[0044]Examples 2~6: High thermal conductivity silicone grease GDZ-2~GDZ-6

[0045] For the experimental procedures of Examples 2-6, refer to Example 1. In terms of parts by weight, refer to the composition of the high-thermal-conductivity silicone grease interface material in Table 1 to prepare Examples 2-6 of the high-thermal-conductivity silicone grease interface material.

[0046] Table 1 Composition of High Thermal Conductivity Silicone Grease Interface Materials in Examples 2-6

[0047]

[0048] Note: The description of raw material components is as follows:

[0049] (B) Silicone oil

[0050] A1: Simethicone

[0051] A2: Methylphenyl silicone oil

[0052] A3: Hydroxyl-terminated simethicone

[0053] (C) Silane coupling agent

[0054] B1: KH550

[0055] B2: KH560

[0056] B3: KH570

[0057] (D) Thermally conductive filler

[0058] C1: Aluminum powder (spherical, average particle size 30um)

[0059] C2: Aluminum powder (spherical, average particle size 15um)

...

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Abstract

The invention discloses a high thermal conductivity silicone grease interface material and a preparation method thereof. The high thermal conductivity silicone grease interface material is characterized in that it is a paste silicone grease with low oil seepage and high thermal conductivity. In the invention, metal or inorganic powder with high thermal conductivity is used as thermal conductive filler, which is added into the organic silicone oil mixture and uniformly mixed by a three-roll grinder to obtain homogeneous gray paste silicone grease. In the paste, the mass percentage of organic silicon oil is 5%-40%, and the mass percentage of the metal or inorganic powder mixed with heat-conducting filler is 60%-95%. The average particle size of the filler is at least three kinds, the large particle size is 15-30um, the medium particle size is 5-10um, and the small particle size is 0.1-1um. The high thermal conductivity silicone grease interface material of the present invention has the characteristics of high thermal conductivity, good heat dissipation effect, small oil leakage, simple preparation process, etc., and is especially suitable for occasions where oil leakage needs to be avoided.

Description

technical field [0001] The invention relates to the technical field of heat-conducting materials, in particular to a method for solving the problem of contact thermal resistance encountered in the heat dissipation process of key stand-alone satellites and components, enhancing the heat dissipation performance of high-power devices, and meeting the requirements for heat dissipation and avoiding oil seepage in the space environment. The needs of the problem. [0002] technical background [0003] The spacecraft needs to experience extremely harsh thermal environments during its flight. In order to ensure the normal operation of the spacecraft, it is necessary to effectively control the heat conduction process between the internal and external components of the spacecraft, stand-alone machines, and instruments. The heat generated by the common chip heat source in a single machine needs to be conducted to the bracket through the circuit board, then to the shell of the single mach...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L83/16C08K13/06C08K9/06C08K7/18C08K7/00C08K3/28C09K5/14
CPCC08K2003/285C08K2201/003C08K2201/011C08K2201/014C08L83/04C08L2205/025C08L2205/035C09K5/14C08L83/16C08K13/06C08K9/06C08K7/18C08K7/00C08K3/28
Inventor 齐会民陈冉冉任晓雯孙敬文陈砚朋王帆朱亚平
Owner EAST CHINA UNIV OF SCI & TECH
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