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Preparation method of nickel-based silver conductive slurry

A conductive paste and nickel-based technology, which is applied in the direction of conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc., can solve the problems of complex sintering process and high equipment requirements, and achieve cost reduction and high conductivity. Good, anti-oxidation effect

Inactive Publication Date: 2012-10-10
JIANGSU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some Ni pastes must be fired in a sintering atmosphere with low oxygen content, the sintering process is complex and requires high equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Preparation of nickel powder: Measure 50ml of 0.2mol / L nickel acetate into a flask, add a certain amount of polyvinylpyrrolidone (PVP) under stirring and mix well. Add a certain amount of hydrazine hydrate to the mixture, quickly adjust the pH of the solution to 13.3 with 1mol / L NaOH solution, heat in a water bath at 80°C for 1 hour, then cool to room temperature, separate the product with a magnet, and wash with deionized water and absolute ethanol , Vacuum drying at 40°C for 12h to obtain nano-nickel powder. Wherein, the dosage ratio of PVP and nickel acetate is 0.5g / 0.01mol, and the dosage ratio of hydrazine hydrate and nickel acetate is 10ml / 0.01mol.

[0032] 2) Preparation of nickel-silver core-shell structure: adding nickel powder to SnCl with a mass fraction of 5% 2 Soak in hydrochloric acid solution for 5 minutes; dissolve silver nitrate in water, add a certain amount of sodium hydroxide, adjust the solution with ammonia water until the solution becomes tran...

Embodiment 2

[0039] 1) Preparation of nickel powder: Measure 50ml of 0.2mol / L nickel acetate into a flask, add a certain amount of polyvinylpyrrolidone (PVP) under stirring and mix well. Add a certain amount of hydrazine hydrate to the mixture, quickly adjust the pH of the solution to 13.3 with 1mol / L NaOH solution, heat in a water bath at 80°C for 1 hour, then cool to room temperature, separate the product with a magnet, and wash with deionized water and absolute ethanol , Vacuum drying at 40°C for 12h to obtain nano-nickel powder. Wherein, the dosage ratio of PVP and nickel acetate is 0.5g / 0.01mol, and the dosage ratio of hydrazine hydrate and nickel acetate is 10ml / 0.01mol.

[0040] 2) Preparation of nickel-silver core-shell structure: adding nickel powder to SnCl with a mass fraction of 5% 2 Soak in hydrochloric acid solution for 5 minutes; dissolve silver nitrate in water, add a certain amount of sodium hydroxide, adjust the solution with ammonia water until the solution becomes tran...

Embodiment 3

[0047] 1) Preparation of nickel powder: Measure 50ml of 0.2mol / L nickel acetate into a flask, add a certain amount of polyvinylpyrrolidone (PVP) under stirring and mix well. Add a certain amount of hydrazine hydrate to the mixture, quickly adjust the pH of the solution to 13.3 with 1mol / L NaOH solution, heat in a water bath at 80°C for 1 hour, then cool to room temperature, separate the product with a magnet, and wash with deionized water and absolute ethanol , Vacuum drying at 40°C for 12h to obtain nano-nickel powder. Wherein, the dosage ratio of PVP and nickel acetate is 0.5g / 0.01mol, and the dosage ratio of hydrazine hydrate and nickel acetate is 10ml / 0.01mol.

[0048] 2) Preparation of nickel-silver core-shell structure: adding nickel powder to SnCl with a mass fraction of 5% 2 Soak in hydrochloric acid solution for 5 minutes; dissolve silver nitrate in water, add a certain amount of sodium hydroxide, adjust the solution with ammonia water until the solution becomes tran...

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Abstract

The invention relates to a preparation method of nickel-based silver conductive slurry, belonging to the technical field of conductive slurry. With a reducing agent of hydrazine hydrate and a protective agent of PVP, nickel acetate as a nickel source is reduced at the normal pressure in liquid phase to obtain nano-nickel metal powder, which is characterized in that raw materials is easy to obtain, that both equipment and operation are simple, and that products are high in yield and purity, small in particle size, and even in particle distribution, etc. With a reducing agent mixed by glucose and tartrate, a silver-ammonia solution is reduced at the normal temperature to coat surface of the nano nickel metal with silver to obtain nickel-based compound metal powder, which is convenient in operation and simple in technology. Thickness of coating is even and is easy to control, and appearance of the coating is good. Prepared slurry is characterized by compact sintering films, strong adhesive force, good conductivity, low cost, and the like, which can greatly reduce production cost of electronic elements.

Description

technical field [0001] The invention relates to a method for preparing a nickel-based silver conductive paste, in particular to a method for preparing a conductive paste using nickel-silver core-shell structure nanometer metal powder as a conductive phase, and belongs to the technical field of conductive paste. Background technique [0002] Conductive paste products are electronic functional materials integrating materials, metallurgy, chemical industry, and electronic technology. They are basic materials for hybrid integrated circuits, sensitive components, surface mount technology, resistor networks, displays, and various electronic discrete components. It is mainly used in electronic industry fields such as thick film hybrid integrated circuits, resistors, multilayer ceramic capacitors, resistor networks, surface assembly technology of sensitive components, and is an important part of electronic information materials. [0003] Gold, silver, palladium, iridium, platinum an...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B1/22H01B1/16
Inventor 谢吉民陈国云荆俊杰秦慧儒李文华姜德立陈敏章明美
Owner JIANGSU UNIV
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