High-thermal-conductivity high-temperature-resistant polysiloxane ceramic composite material, as well as preparation method and applications thereof

A ceramic composite material, polysiloxane technology, applied in the direction of heat exchange materials, chemical instruments and methods, can solve the problems of difficult cleaning, increased thermal resistance, violent volatilization, etc., to achieve high thermal conductivity, good elasticity, Excellent effect of high temperature aging resistance

Active Publication Date: 2014-07-30
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, thermal conductive silicone grease is easy to stick and difficult to clean. After long-term storage of thermal conductive grease, oil separation will occur, causing thermal resistance to increase
Silicone thermal grease is a non-cross-linked material, and its maximum operating temperature is 150°C. When the temperature exceeds 180°C, the silicone oil in the thermal grease will volatilize violently and cause a degradation reaction, so it is not suitable for use at 150°C. Above or components with high optical performance requirements

Method used

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  • High-thermal-conductivity high-temperature-resistant polysiloxane ceramic composite material, as well as preparation method and applications thereof
  • High-thermal-conductivity high-temperature-resistant polysiloxane ceramic composite material, as well as preparation method and applications thereof
  • High-thermal-conductivity high-temperature-resistant polysiloxane ceramic composite material, as well as preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: raw material preparation

[0034] (1) Put boron nitride, aluminum nitride, silicon carbide, and silicon nitride, which are thermally conductive and high-temperature resistant ceramic powder fillers with an average particle size of 1 to 50 μm, in a vacuum drying oven, vacuumize, and heat up to 150°C , keep the vacuum degree (-101.3KPa) for 3 hours, then take it out after cooling, and place it in a dry box for later use.

[0035] (2) Preparation of silyl borazine: Take out 40.3g of borazine from the low-temperature -5°C storage room, pour it into a 1000mL three-necked bottle equipped with a drying device, add 200g of dry dichloromethane, Add 0.4 g of RhH(CO)(PPH 3 ) 3 , keep stirring and slowly add 322g of vinyl tris(trimethylsiloxy)silane, stir and react at room temperature for 8 hours, then add 0.2g of ethynyl cyclohexanol, distill under reduced pressure, remove low boiling point solvent, and prepare disilane The base-based silyl borazine BZ2 is stored ...

Embodiment 2

[0054] A method for preparing a high thermal conductivity and high temperature resistant polysiloxane ceramic composite material, the specific steps are as follows:

[0055] At room temperature, 100 g of terminal vinyl methyl silicone oil (viscosity 50000 mPa s), 30 g of vinyl methyl MQ silicone resin (vinyl content 4.0 wt%, M / Q=1.5), tris(triphenylphosphine)rhodium carbonyl hydride (I)RhH(CO)(PPH 3 ) 3 (The content of metal rhodium is 11.2wt%) 0.45g, 3g of borazine and 100g of boron nitride ceramic powder (average particle size 50μm) dried in Example 1 are mixed evenly, and placed in an environment of 50°C for 5 Hours, the high thermal conductivity and high temperature resistant polysiloxane ceramic composite material was obtained.

[0056] After the composite material was cooled, its Shore hardness, thermal conductivity and high temperature aging resistance were measured. The experimental test results are listed in Table 1.

[0057] Shore hardness test: directly test the...

Embodiment 3

[0061] A method for preparing a high thermal conductivity and high temperature resistant polysiloxane ceramic composite material, the specific steps are as follows:

[0062] At room temperature, 100 g of terminal vinyl methyl silicone oil (viscosity 3000 mPa s), 100 g of vinyl methyl MQ silicone resin (vinyl content 2.4 wt%, M / Q=0.75), 0.48 g of ethynyl cyclohexanol, tri( Triphenylphosphine) rhodium carbonyl hydride (I) RhH (CO) (PPH 3 ) 3 (The content of metal rhodium is 11.2wt%) 4.3g, 30g of disilyl borazine BZ2 (prepared in Example 1) and 100g of boron nitride ceramic powder (average particle size 10 μm) dried and treated in Example 1 are mixed After uniformity, it was placed in an environment of 150° C. for 2 hours to obtain the polysiloxane ceramic composite material with high thermal conductivity and high temperature resistance.

[0063] After the composite material is cooled, its hardness, thermal conductivity and high-temperature aging resistance are measured, and th...

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Abstract

The invention discloses a high-thermal-conductivity high-temperature-resistant polysiloxane ceramic composite material, as well as a preparation method and applications thereof. The composite material comprises the following components in parts by mass: 100 parts of vinyl polysiloxane, 20-100 parts of vinyl methyl MQ silicone resin, 0-0.5 part of inhibitor, 0.05-0.5 part of precious metal organic compound catalyst, 3-30 parts of borazine and / or borazine derivatives, 0-5 parts of methyl hydrogen silicone oil and 50-150 parts of high-thermal-conductivity ceramic powder. The high-thermal-conductivity high-temperature-resistant polysiloxane ceramic composite material is high in thermal conductivity coefficient, good in elasticity, waterproof, damp-proof, insulating, can absorb absorption, and has excellent high temperature ageing resistance, thus having wide application prospects in the fields of aviation, aerospace, electronics, electrics and communication and illumination and the like.

Description

technical field [0001] The invention belongs to the field of organosilicon nanocomposite materials, and in particular relates to a polysiloxane ceramic composite material with high thermal conductivity and high temperature resistance, as well as its preparation method and application. Background technique [0002] Thermally conductive protective materials are widely used in areas that require heat dissipation and heat transfer in aviation, aerospace, electronics, electrical, communication lighting, weaponry, nuclear reactors, etc. Exchangers, solar water heaters, battery coolers, etc., can also be used as materials for transportation, sealing, decoration, embedding, etc., and have broad application prospects. With the rapid development of integration, miniaturization and high power of electronic equipment and semiconductor materials, higher requirements are put forward for them. In addition to providing protection against moisture, insulation, corrosion and high temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C09K5/14C08K13/02C08K5/55C08K3/38C08K3/28C08K3/34
Inventor 黄月文王斌
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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