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Silver micro powder and preparation method and application thereof

A technology of silver micropowder and silver nitrate, which is used in transportation and packaging, metal processing equipment, cable/conductor manufacturing, etc., can solve problems such as the difficulty of conductivity to meet the requirements of conductive paste, poor surface contact of silver micropowder, and printing disconnection. , to achieve the effect of photoelectric conversion rate, high production efficiency, and reduced contact resistivity

Pending Publication Date: 2022-02-18
广东羚光新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, because flaky silver powder and conventional silver micropowder are the basic raw materials of low-temperature polymer paste, conductive ink, and conductive coating, the flaky silver powder obtained through the ball milling process generally has defects such as cold welding, lamination, and large pieces. , Coatings, especially touch screen laser engraving silver paste, are prone to problems such as poor fineness, printing disconnection, etc.
While the conventional silver micropowder can avoid the problems of flaky silver powder in the use of conductive ink, coating and touch screen silver paste, but due to the poor surface contact of silver micropowder, the conductivity is difficult to meet the use requirements of conductive paste

Method used

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  • Silver micro powder and preparation method and application thereof
  • Silver micro powder and preparation method and application thereof
  • Silver micro powder and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0062] A preparation method of silver micropowder.

[0063] Preparation of silver nitrate solution: Dissolve 1kg of silver nitrate in 5L of deionized water to make a silver nitrate solution, and control the temperature of the solution to 15±2°C;

[0064] Preparation of dispersant solution: Weigh 1.5g of PVA and dissolve it in 20ml of deionized water to make a dispersant solution, and control the temperature of the solution to 30°C;

[0065] Prepare the shape modifier solution: weigh 2g of silver chloride and dissolve it in 30ml of deionized water to make a shape modifier solution, and control the solution temperature to 30°C;

[0066] Preparation of pH adjuster solution: Weigh 50g of sodium carbonate, add deionized water to dissolve into 200ml of pH adjuster solution, and control the temperature at 30-60°C;

[0067] Preparation of reducing agent solution: Weigh 0.8Kg of ascorbic acid into the batching bucket, add water to dissolve and prepare a 3L reducing agent solution, and...

Embodiment 2

[0073] A preparation method of silver micropowder.

[0074] Preparation of silver nitrate solution: Dissolve 1kg of silver nitrate in 5L of deionized water to make a silver nitrate solution, and control the temperature of the solution to 15±2°C;

[0075] Preparation of dispersant solution: Weigh 1.5g of PVA and dissolve it in 20ml of deionized water to make a dispersant solution, and control the solution temperature to 30°C;

[0076] Prepare the shape modifier solution: weigh 2g of silver chloride and dissolve it in 30ml of deionized water to make a shape modifier solution, and control the solution temperature to 30°C;

[0077] Preparation of pH adjuster solution: Weigh 50g of sodium hydroxide, add deionized water to dissolve into 200ml of pH adjuster solution, and control the temperature at 30-60°C;

[0078] Preparation of reducing agent solution: Weigh 0.8Kg of ascorbic acid into the batching bucket, add water to dissolve and prepare a 3L reducing agent solution, and heat t...

Embodiment 3

[0084] A preparation method of silver micropowder.

[0085] Preparation of silver nitrate solution: Dissolve 1kg of silver nitrate in 5L of deionized water to make a silver nitrate solution, and control the temperature of the solution to 15±2°C;

[0086] Preparation of dispersant solution: Weigh 1.5g of PVA and dissolve it in 20ml of deionized water to make a dispersant solution, and control the solution temperature to 30°C;

[0087] Prepare the shape modifier solution: weigh 2g of silver chloride and dissolve it in 30ml of deionized water to make a shape modifier solution, and control the solution temperature to 30°C;

[0088] Preparation of pH regulator solution: Add deionized water to ammonia water to prepare 200ml of pH regulator solution with a concentration of 1.5mol / L, and control the temperature at 30-60°C;

[0089] Preparation of reducing agent solution: Weigh 0.8Kg of ascorbic acid into the batching bucket, add water to dissolve and prepare a 3L reducing agent solut...

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Abstract

The invention relates to silver micro powder and a preparation method and application thereof, and relates to the technical field of functional materials. The preparation method comprises the following steps: preparing a silver nitrate solution at a temperature of 10-20 DEG C, a dispersant solution at a temperature of 30-60 DEG C, a morphology regulator solution at a temperature of 25-35 DEG C, a pH regulator solution at a temperature of 30-60 DEG C and a reducing agent solution at a temperature of 55-65 DEG C; adding the pH regulator solution into the silver nitrate solution, performing stirring, adding the morphology regulator solution, the reducing agent solution and the dispersing agent solution, performing mixing, adjusting the temperature to 30-60 DEG C, and performing reaction for 30-90 minutes; performing cleaning until the electric conductivity of the reacted product is less than 50 [mu]s / cm, and performing settling and separating; and adding a surface treating agent, performing drying, powdering and sieving to obtain a product. The mass of a morphology regulator is 0.1-0.5% of the mass of the silver micro powder, and the morphology regulator comprises at least one of silver chloride, silver bromide and silver iodide. The preparation method is simple and easy to implement and high in production efficiency.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a silver micropowder and its preparation method and application. Background technique [0002] With the development of the electronic industry, my country has become the world's largest consumer of electronic products. In the electronic information industry, electronic paste is one of the important materials for the production of various electronic components, and conductive fillers are required to be used upstream of electronic paste. Materials, with stronger performance and higher reliability, can be suitable for lower cost development. [0003] Silver powder is widely used in electronic equipment as a conductive filler, such as solar conductive paste, conductive adhesive, silver paste for touch screen, due to its good electrical and thermal conductivity among metals, stable performance, low oxidation degree and low oxidation tendency. Silver powder is required in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/068B22F1/06H01B1/02H01B13/00
CPCB22F9/24H01B1/02H01B13/00Y02E10/50
Inventor 夏云霞娄红涛韦博邱衍嵩梁家辉韦书佳黄文达
Owner 广东羚光新材料股份有限公司
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