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Silver colloid material with high heat transfer efficiency and preparation thereof

A technology with high thermal conductivity and high efficiency, applied in adhesives, conductive adhesives, monocarboxylate copolymer adhesives, etc., can solve the problems of low thermal conductivity and achieve improved high-temperature thermal conductivity, excellent thermal conductivity and thermal conductivity Excellent stability and product repeatability

Inactive Publication Date: 2009-07-08
EAST CHINA NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to utilize the advantages of high thermal conductivity of nano-carbon materials, overcome the disadvantages of low thermal conductivity of silver colloidal materials in the prior art, and adopt a high-efficiency and low-cost material and method to prepare high thermal conductivity silver colloidal materials

Method used

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  • Silver colloid material with high heat transfer efficiency and preparation thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Prepare carbon nanotube powder by arc method or laser method;

[0010] Grinding carbon nanotubes by dry ball milling: choose a satellite ball mill, put carbon nanotube powder and large and small balls into the grinding tank of the ball mill, the ball milling tank is a steel tank, and the grinding balls are 5 large steel balls and 20 small balls. Steel balls, the outer diameter of the large steel ball is 10 mm, the outer diameter of the small steel ball is 6 mm, the weight ratio of the large ball: small ball: carbon nanotube powder is 7:14:0.5, the pressure in the grinding tank and the speed of the ball mill are respectively 1 atmosphere Carry out dry method ball milling under the condition of 100 rpm and 100 rpm, the time is 1 hour, after cooling down to room temperature naturally, the raw materials processed by dry method ball milling are taken out;

[0011] Take out the ball-milled mixture, pour it into 20ml of acetone, and then remove the large particles in the solut...

Embodiment 2

[0016] Preparation of carbon nanofiber powder by chemical vapor deposition;

[0017] Oxidation treatment: take out 50g of carbon nanofiber powder, put it into a vacuum furnace, heat it to 300 degrees Celsius in an oxygen atmosphere, keep it warm for 1 hour, and cool it down to room temperature naturally;

[0018] The oxidized mixture is taken out, poured into 30ml of cetyltrimethylammonium bromide, and then the large particles in the solution are filtered out and removed by precipitation;

[0019] Put the remaining powder into the oven and bake at 30°C for 2 hours;

[0020] Then reflux treatment with hydrochloric acid or nitric acid or sulfuric acid solution with a concentration of 6mol / L for 20 hours to purify the carbon nanofibers;

[0021] Put the purified and filtered carbon nano raw materials, silver (Ag) particles and polyacrylonitrile / styrene-acrylonitrile copolymer in a kneader, and the weight ratio of carbon raw materials / silver (Ag) particles / thermally conductive po...

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Abstract

The invention relates to the technical field of fulmargin material, in particular to a material for preparing fulmargin with high thermal conducting efficiency and a method for preparing the fulmargin. The method is characterized in that a conduction body adopts powdery nanometer to micron-level silver particles; a dispersant and a solvent adopt thermal conducting polymers; a nanometer material is used as a thermal conducting filler of silver slurry; and the nanometer material is a nanometer carbon tube, nanometer carbon fiber, nanometer metal nitride, nanometer metal oxide or nanometer metal carbide. Compared with the prior art, the method uses the nanometer material as a raw material, has the characteristics of simple preparation process, low energy consumption and low cost, and can improve high-temperature thermal conductivity of the fulmargin through the blending of the thermal conducting polymers on the basis of ensuring the basic property of the fulmargin, so that a prepared product has excellent thermal conductivity and thermal stability, simple operation and excellent repeatability.

Description

[technical field] [0001] The invention relates to the technical field of silver glue materials, in particular to a material and a method for preparing silver glue with high thermal conductivity. [Background technique] [0002] In recent years, with the gradual development of electronic components in the direction of miniaturization and light weight, the Sn / Pb solder traditionally used in the electronic packaging industry has gradually exposed disadvantages such as non-environmental protection, high soldering temperature and easy damage to devices. Therefore, the conductive adhesive using metal powder as the conductive body has gradually become a substitute, and is widely used in microelectronic packaging industries such as SMT, SMD, and PCB. It can improve the line resolution of the connection; because the substrate is a polymer material, it can be used on a flexible substrate, and has a series of advantages such as simple coating process and low curing temperature. For exa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J9/02C09J123/04C09J131/04C09J127/00C09J133/20C09J125/12
Inventor 张哲娟孙卓潘丽坤孙鹏林丽锋
Owner EAST CHINA NORMAL UNIV
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