Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of heat-conducting silicone grease composition with high thermal conductivity and low viscosity and preparation method thereof

A thermally conductive silicone grease, high thermal conductivity technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve problems such as hindering the slippage and flow of fillers, increasing the viscosity of silicone grease, and decreasing the operability of products.

Active Publication Date: 2021-01-12
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current technology only considers the effect of multi-dimensional filler compounding on the thermal conductivity of silicone grease. In most cases, the addition of one-dimensional fibers and two-dimensional sheet structures forms an overall three-dimensional network structure. Although it is beneficial to the formation of thermal conduction channels, it hinders The relative slip and flow between the fillers will lead to a sharp increase in the viscosity of the silicone grease, which will seriously reduce the operability of the product.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A thermally conductive silicone grease composition with high thermal conductivity and low viscosity, including polyorganosiloxane, thermally conductive fillers, and other additives. Among them, the polyorganosiloxane is 100g of dimethyl silicone oil; the thermally conductive filler is 100g of carbon nanotubes (one-dimensional fiber shape, tube diameter 0.01 μm, length 2 μm), 100 g of hexagonal boron nitride (two-dimensional sheet shape, lateral size ( Sheet surface equivalent diameter) 15μm, longitudinal dimension (sheet thickness) 0.1μm), aluminum powder 700g (three-dimensional irregular shape, particle size 20μm); coupling agent KH-570, 5g.

Embodiment 2

[0036]A thermally conductive silicone grease composition with high thermal conductivity and low viscosity, including polyorganosiloxane, thermally conductive fillers, and other additives. Among them, the polyorganosiloxane is 100g of dimethyl silicone oil; the thermally conductive filler is 100g of carbon nanotubes (one-dimensional fibrous shape, tube diameter 0.03 μm, length 8 μm), 100 g of hexagonal boron nitride (two-dimensional sheet shape, lateral size ( Sheet equivalent diameter) 40μm, longitudinal dimension (sheet thickness) 0.8μm), aluminum powder 700g (three-dimensional irregular shape, particle size 20μm); coupling agent KH-570, 5g.

Embodiment 3

[0038] A thermally conductive silicone grease composition with high thermal conductivity and low viscosity, including polyorganosiloxane, thermally conductive fillers, and other additives. Among them, the polyorganosiloxane is 100g of dimethyl silicone oil; the thermally conductive filler is 100g of acicular boron nitride (one-dimensional fibrous, diameter 0.03μm, length 8μm), flaky silver powder 100g (two-dimensional flake, lateral dimension (sheet equivalent diameter) 40μm, longitudinal dimension (sheet thickness) 0.8μm), aluminum powder 400g (three-dimensional irregular shape, particle size 20μm), aluminum powder 300g (three-dimensional irregular shape, particle size 0.5μm) coupling agent KH-570, 5g.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a heat-conductive silicone grease composition being high in heat conductivity and low in viscosity and freeness degree, and a preparation method of the silicone grease composition. The heat-conductive silicone grease composition includes organo-polysiloxane, heat conductive filler and other additives. By selecting the heat conductive fillers in multiple dimensions (one-dimension, two-dimension and three-dimension) and multiple scales (micron, submicron and nanometer) and in special ranges, synergistic effect among the multi-dimension and multi-scale fillers is achieved,thus achieving compact stack of the fillers in a local network structure. The heat-conductive silicone grease not only is improved in heat-conductivity but also has good flowability, low viscosity and low freeness degree.

Description

technical field [0001] The invention belongs to the field of thermal interface materials, and in particular relates to a thermally conductive silicone grease composition with high thermal conductivity and low viscosity and a preparation method thereof. Background technique [0002] With the rapid development of electronic technology, the degree of integration and assembly density of electronic components has been continuously improved. While providing powerful functions, it has also led to a sharp increase in power consumption and heat generation. There are extremely fine uneven gaps between the surface of electronic components and the heat sink. If they are directly installed together, the actual contact area is only 10% of the base area of ​​the heat sink, and the rest are air gaps. Because air is a poor conductor of heat, it will lead to a very large contact thermal resistance between the electronic components and the heat sink, which seriously hinders the conduction of h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K13/06C08K9/06C08K7/24C08K3/38C08K3/08C08K7/04C09K5/14
Inventor 刘斌张航淮秀兰蔡军陈哲孙方远杨明
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products