Method for preparing Ag-coating-Ni composite nano powder conductive slurries

A nano-powder and conductive paste technology, applied in the fields of nanotechnology and microelectronics, can solve problems such as instability, poor conductivity, and conductivity easily affected by the environment, and achieves low sintering temperature and high conductivity stability. Effect

Inactive Publication Date: 2013-03-13
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conductivity of nickel powder paste is not as good as that of gold, silver and palladium, but it is cheap and can be used for electromagnetic shielding, but it cannot be used for printed circuit boards with high conductivity requirements
The conductivity of copper powder paste is good and the price is cheap, but its conductivity is easily affected by the environment and is not very stable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A mixture of Ag block and Ni block with a weight ratio of 6% is used as the anode, metal tungsten is used as the cathode, and the total pressure is 0.6×10 5 Pa, the proportion of hydrogen is 50% in the mixed atmosphere of hydrogen and helium to prepare Ag-coated Ni composite nanopowder, the average particle diameter of the composite nanoparticles is 68 nanometers, and the silver content in the composite nanoparticles is 11wt%. Weigh 46wt% of Ag-coated Ni composite nano-powder, nano-ZnO 2 wt%, and nano-SiO 2 2 wt%, nano SnO 2wt%, ethyl cellulose 3wt%, terpineol 39wt%, absolute ethanol 6wt%. First, mix terpineol and absolute ethanol thoroughly, then add ethyl cellulose, dissolve the ethyl cellulose completely in a water bath (water temperature 75~85°C), stir well and use ultrasonic vibration for 5 minutes, then add Ag-coated Ni composite nanopowder, after fully stirring, oscillate with ultrasonic wave for 8 minutes, then add nano-ZnO and nano-SiO 2 , nano-SnO, fully st...

Embodiment 2

[0029] A mixture of Ag block and Ni block with a weight ratio of 10% is used as the anode, and metal tungsten is used as the cathode. The total pressure is 1.013×10 5 Pa, the Ag-coated Ni composite nanopowder was prepared in a mixed atmosphere of hydrogen and helium with a hydrogen ratio of 50%. The average particle diameter of the composite nanoparticles was 102 nanometers, and the silver content in the composite nanoparticles was 22wt%. Weigh 48wt% Ag-coated Ni composite nanopowder, nano-ZnO 3 wt%, nano-SiO 2 2 wt%, nano SnO 3wt%, ethyl cellulose 2wt%, terpineol 36wt%, absolute ethanol 6wt%. First, mix terpineol and absolute ethanol thoroughly, then add ethyl cellulose, dissolve the ethyl cellulose completely in a water bath (water temperature 75~85°C), stir well and use ultrasonic vibration for 5 minutes, then add Ag-coated Ni composite nano-powder, after fully stirring, use ultrasonic vibration for 10 minutes, then add nano-ZnO, nano-SiO 2 , nano SnO, fully stirred agai...

Embodiment 3

[0031] A mixture of Ag block and Ni block with a weight ratio of 15% is used as the anode, and metal tungsten is used as the cathode. The total pressure is 1.013×10 5 Pa, the Ag-coated Ni composite nanopowder was prepared in a mixed atmosphere of hydrogen and helium with a hydrogen ratio of 50%. The average particle diameter of the composite nanoparticles was 116 nanometers, and the silver content in the composite nanoparticles was 29wt%. Weigh respectively 44wt% of Ag-coated Ni composite nanopowder, nanometer ZnO 3 wt%, nanometer SiO 2 3 wt%, nano SnO 3wt%, ethyl cellulose 2wt%, terpineol 39wt%, absolute ethanol 6wt%. First, mix terpineol and absolute ethanol thoroughly, then add ethyl cellulose, dissolve the ethyl cellulose completely in a water bath (water temperature 75~85°C), stir well and use ultrasonic vibration for 5 minutes, then add Ag-coated Ni composite nanopowder, after fully stirring, use ultrasonic vibration for 10 minutes, then add nano-ZnO, nano-SiO 2 , nan...

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Abstract

The invention relates to a method for preparing Ag-coating-Ni composite nano powder conductive slurries. A direct-current arc plasma method is used, a mixture of block Ag and block Ni serves as a positive electrode, and metal tungsten serves as a negative electrode to prepare Ag-coating-Ni composite nano powder and conductive slurries. The prepared conductive slurries are low in sintering temperature, in no need of protection gas during sintering, higher than nano Ni powder, Cu powder and Ag-Cu alloy powder slurries in conductive stability, hopeful for replacing expensive gold, silver and palladium conductive slurries and suitable for industrial application.

Description

technical field [0001] The invention relates to the fields of nanotechnology and microelectronics, in particular to a method for preparing a thick-film conductive paste with Ag-coated Ni composite nano-powder as the main raw material. Background technique [0002] Conductive paste is widely used in the electronics industry, and the commonly used conductive materials in the conductive paste include gold, silver, palladium, nickel, copper and other metal powders and carbon powders. Gold, silver, and palladium conductor pastes have good conductivity, but are expensive, especially silver pastes are prone to ion migration in an external electric field, which affects insulation. The price of carbon powder paste is cheap, but the conductivity is poorer than other materials. The conductivity of nickel powder paste is not as good as that of gold, silver and palladium, but it is cheap and can be used for electromagnetic shielding, but it cannot be used for printed circuit boards wit...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B1/22
Inventor 孙维民
Owner SHENYANG POLYTECHNIC UNIV
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