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Preparation method for flower-shaped micron-sized silver powder with slender and large petals

A micron silver powder and flower-shaped technology, which is applied in the field of preparation of flower-shaped micron silver powder, can solve problems such as complicated preparation process

Pending Publication Date: 2019-05-21
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the patent CN106424752A, the first reducing agent solution, the second reducing agent solution, and the surfactant solution need to be used. In the patent CN101579746A, acid or alcohol needs to be added to the soluble silver salt and the reducing agent, so the preparation process is more complicated.

Method used

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  • Preparation method for flower-shaped micron-sized silver powder with slender and large petals
  • Preparation method for flower-shaped micron-sized silver powder with slender and large petals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Dissolve silver nitrate in water to obtain a 0.9 mol / L silver nitrate aqueous solution. The reducing agent ascorbic acid was dissolved in water to obtain a 0.9 mol / L ascorbic acid aqueous solution. Quickly add 9.6mL of ascorbic acid aqueous solution to 10mL of silver nitrate aqueous solution at a stirring rate of 100 rpm, react at 20°C for 10 minutes, then wash the silver powder with a large amount of deionized water immediately, and obtain a flower-shaped flower with slender and long petals after drying. micron silver powder.

Embodiment 2

[0016] Dissolve silver nitrate in water to obtain a 1.1 mol / L silver nitrate aqueous solution. The reducing agent ascorbic acid was dissolved in water to obtain a 1.1 mol / L ascorbic acid aqueous solution. Quickly add 106mL of ascorbic acid aqueous solution to 100mL of silver nitrate aqueous solution at a stirring rate of 500 rpm, react at 30°C for 5 minutes, then immediately wash the silver powder with a large amount of deionized water, and obtain a flower-shaped micron with slender and long petals after drying. silver dust.

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Abstract

The invention discloses a preparation method for flower-shaped micron-sized silver powder with slender and large petals. The preparation method includes the following steps that silver nitrate water solution is prepared, ascorbic acid aqueous solution is quickly added to the silver nitrate solution at a certain stirring rate, reaction is conducted at 20-30 DEG C for 5-10 minutes, silver powder iswashed with a large number of deionized water immediately, and the flower-like micron-sized silver powder with the slender and large petals is obtained after drying. The method does not need to add substances such as surfactants, the preparation process is simple and easy to operate, and the obtained silver powder is uniform in appearance, high in purity, and high in conversion rate, and suitablefor actual production.

Description

technical field [0001] The invention belongs to the technical field of metal particle synthesis, and in particular relates to a preparation method of flower-shaped micron silver powder with slender and long petals. Background technique [0002] Silver powder can be widely used in conductive rubber, conductive adhesive, conductive coating, etc., involving many fields such as electronic equipment, catalysis, antibacterial, electromagnetic shielding, etc. At present, widely used silver powder is mainly flaky, spherical and spherical silver powder prepared by ball milling method or chemical synthesis method, such as the preparation method of a small particle size flaky silver powder in Chinese patent (CN108405859A), good dispersion The preparation method of fine silver powder (CN105345023A) etc. In addition, there are also reports about preparing polygonal silver powder (CN1401452A), rod-shaped silver powder (CN1059211765A), and dendritic silver powder (CN101811196A, CN10135381...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 纪艳红何本桥苗鹏吴鑫黄晨波赵兰兰于跃阴育辰
Owner TIANJIN POLYTECHNIC UNIV
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