Preparation method of silver particle with sheet-strip integrated structural shape

A silver particle and integrated technology, which is applied in the field of preparation of silver particle materials with special morphology, can solve the problem of not seeing silver particles, and achieve the effect of low cost of waste liquid treatment, high yield, and no raw materials and by-products

Active Publication Date: 2012-09-19
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But so far, in the prior art, there is no report on the preparation of silver particles with integrated structure and morphology by solution reduction method.

Method used

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  • Preparation method of silver particle with sheet-strip integrated structural shape
  • Preparation method of silver particle with sheet-strip integrated structural shape
  • Preparation method of silver particle with sheet-strip integrated structural shape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Dissolve 2g of silver nitrate in 20ml of deionized water to prepare a silver nitrate solution, add 0.8ml of nitric acid (65-68% mass concentration) into the silver nitrate solution under stirring, and then add 0.001g of ethylene dichloride Disodium amine tetraacetate, the mixed solution that obtains is used as oxidation solution;

[0040] (2) Dissolve 1.2g of ascorbic acid in 8ml of deionized water as the reducing solution;

[0041] (3) Under the conditions of a temperature of 20°C and a stirring speed of 400 rpm, quickly mix all the oxidizing solution obtained in step (1) with all the reducing solution obtained in step (2), and then let it stand for reaction after mixing evenly 15 minutes; then stir to collect the precipitated product, wash the precipitated product 3 to 5 times with deionized water and then wash it twice with ethanol, and dry at low temperature after suction to obtain silver particles with an integrated structure.

[0042] Such as Figure 1a As sho...

Embodiment 2

[0044] It is basically the same as Example 1, except that what used 1g silver nitrate and what used 0.6g ascorbic acid when preparing silver nitrate solution and preparing reducing solution was different. Observing with a scanning electron microscope, the silver particles with the obtained flake-band integrated structure morphology are an integral structure composed of flake silver and ribbon silver, wherein the flake width of the flake silver part is between 8 and 10 microns, and the flake silver Part of the thickness of the sheet is between 100 and 200 nanometers; the length of the band of the band-shaped silver part is between 10 and 25 microns, the width of the band is between 200 and 400 nanometers, and the thickness of the band is between 100 and 200 nanometers between.

Embodiment 3

[0046] (1) Dissolve 1g of silver nitrate in 15ml of deionized water to prepare a silver nitrate solution, add 0.4ml of nitric acid (65-68% mass concentration) into the silver nitrate solution under stirring, and then add 0.001g of ethylene glycol Disodium amine tetraacetate, and add 4ml absolute ethanol, the mixed solution that obtains is used as oxidation solution;

[0047] (2) Dissolve 0.6g of ascorbic acid in 6ml of deionized water as the reducing solution;

[0048] (3) Under the conditions of a temperature of 20°C and a stirring speed of 200 rpm, quickly mix all the oxidizing solution obtained in step (1) with all the reducing solution obtained in step (2), and then let it stand for reaction after mixing evenly 20 minutes; then the precipitated product was collected by filtration, washed with deionized water and ethanol for 3 to 5 times, and dried naturally to obtain silver particles with an integrated structure.

[0049] The crystal structure type of the silver particles...

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Abstract

The invention relates to a preparation method of a silver particle with a sheet-strip integrated structural shape. The preparation method of the silver particle with the sheet-strip integrated structural shape comprises the following step of preparing the silver particle with the sheet-strip integrated structural shape by a chemical liquid-phase reduction method by taking deionized water or distilled water as a solvent, a soluble silver salt as a silver source, an organic acid and/ or an organic acid salt and an inorganic acid as main shape controlling agents, a small molecular alcohol and/ or ketone as a modifier, and ascorbic acid and/ or ascorbate as a reductant, wherein the silver particle has an integral structure consisting of silver by sheet-shaped silver and strip-shaped silver; the width of the sheet-shaped silver is between 2-20 microns and adjustable; the thickness of the sheet-shaped silver is 100-300 nanometers and adjustable; the length of the strip-shaped silver is 5-50microns and adjustable; the width of the strip-shaped silver is 200-500 nanometers and adjustable; and the thickness of the strip-shaped silver is 100-300 nanometers and adjustable. The preparation method of the silver particle with the sheet-strip integrated structural shape is mild in preparation conditions; and prepared silver particles are high in yield and high in purity.

Description

technical field [0001] The invention relates to a preparation method of a silver particle material with a special shape, in particular to a preparation method of a silver particle with an integrated structure and shape of a strip. Background technique [0002] Because metal silver powder has excellent electrical conductivity, thermal conductivity and catalytic properties, it can be widely used in the fields of electronics industry, catalysis, antibacterial, electromagnetic protection and so on. In the electronics industry, silver powder is mainly used as a conductive filler, prepared into conductive silver paste, conductive coating, conductive silver glue, conductive silver ink, etc., and prepared into conductive silver paste, conductive coating, conductive silver glue, conductive silver ink, etc. Circuits, conductive patterns, electronic devices, etc. [0003] The preparation methods of metallic silver powder mainly include thermal decomposition method, electrochemical met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 刘春艳聂士东张志颖
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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