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Preparation method of superfine cobalt powder

A technology of ultrafine cobalt powder and preparation steps, applied in the field of cemented carbide, can solve the problems of high oxygen content in cobalt powder products, wide particle size distribution range, affecting product performance, etc., and achieves good dispersibility, uniform particle size, and reduced The effect of oxygen content

Inactive Publication Date: 2017-11-17
常州瑞坦商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the problems that the cobalt powder prepared by the traditional process has a large particle size, a wide particle size distribution range, serious agglomeration, and high oxygen content in the cobalt powder product, which affects product performance, a kind of The preparation method of superfine cobalt powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] First, weigh 8g of sodium dodecylbenzenesulfonate, 3g of emulsifier OP-10, 60g of polystyrene acrylic acid, and 8g of sucrose in turn, pour them into a flask filled with 600mL of deionized water, and move the flask into a digital display speed measuring constant temperature With a magnetic stirrer, at a temperature of 55°C and a rotational speed of 800r / min, stir and mix at a constant temperature for 10 minutes to obtain a polystyrene acrylic emulsion; then take 20g of citric acid and 400mL of the obtained polystyrene acrylic emulsion, and pour them into a three-necked flask , and move the three-necked flask into a digital display speed measuring constant temperature magnetic stirrer, at a temperature of 30°C and a rotating speed of 400r / min, stir and mix at a constant temperature for 10 minutes, and then add dropwise to the three-necked flask through a dropping funnel under constant temperature stirring 100mL mass fraction is 10% cobalt chloride solution, control the dr...

example 2

[0025]First, weigh 9g of sodium dodecylbenzenesulfonate, 4g of emulsifier OP-10, 70g of polystyrene acrylic acid, and 9g of sucrose, and pour them into a flask filled with 700mL of deionized water, and move the flask into a digital display speed measuring constant temperature With a magnetic stirrer, at a temperature of 58°C and a speed of 1000r / min, stir and mix at a constant temperature for 15 minutes to obtain a polystyrene acrylic emulsion; then take 25g of citric acid and 450mL of the obtained polystyrene acrylic emulsion, and pour them into a three-necked flask , and the three-necked flask was moved into a digital display speed measuring constant temperature magnetic stirrer, at a temperature of 33°C and a rotating speed of 500r / min, stirred and mixed at a constant temperature for 15 minutes, and then dripped into the three-necked flask through a dropping funnel under a state of constant temperature stirring 130mL of 15% cobalt chloride solution with a mass fraction of 15...

example 3

[0028] First, weigh 10g sodium dodecylbenzenesulfonate, 5g emulsifier OP-10, 80g polystyrene acrylic acid, and 10g sucrose in turn, pour them into a flask containing 800mL deionized water, and move the flask into a digital display speed measuring constant temperature With a magnetic stirrer, at a temperature of 60°C and a speed of 1200r / min, stir and mix at a constant temperature for 20 minutes to obtain a polystyrene acrylic emulsion; then take 30g of citric acid and 500mL of the obtained polystyrene acrylic emulsion, and pour them into a three-necked flask , and the three-necked flask was moved into a digital display speed measuring constant temperature magnetic stirrer, at a temperature of 35°C and a rotating speed of 600r / min, stirred and mixed at a constant temperature for 20 minutes, and then in a state of constant temperature stirring, added dropwise to the three-necked flask through a dropping funnel 150mL of cobalt chloride solution with a mass fraction of 20% is contr...

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Abstract

The invention discloses a preparation method of superfine cobalt powder and belongs to the technical field of hard alloys. According to the method, at first, sodium dodecyl benzene sulfonate and OP-10 serve as emulsifying agents, potassium persulfate serves as an initiator, styrene and acrylic acid serve as monomers, polystyrene acrylic emulsion is prepared after the reaction, citric acid serves as a complexing agent in cooperation, in the reaction process, yeast consumes the citric acid, cobalt ions are released slowly and hydrolyzed in an alkalescence environment to generate cobaltous hydroxide, after the cobaltous hydroxide is heated and dehydrated, cobalt monoxide crystal nuclei are generated and uniformly adsorbed to the surface of polystyrene acrylic acid and reduced into cobalt elementary substances through L-ascorbic acid, finally, dopamine is utilized for coating the cobalt elementary substances, the cobalt elementary substances are prevented from being oxidized in the drying process, and after high-temperature anaerobic calcinations is carried out to remove polystyrene acrylic acid kernels and the dopamine, the superfine cobalt powder is prepared. According to the method, in the preparation process, the cobalt elementary substances can be effectively prevented from agglomerating, growing up and being oxidized, the particle size of the obtained product is small, and the distribution range of the particle size is narrow.

Description

technical field [0001] The invention relates to a preparation method of ultrafine cobalt powder, which belongs to the technical field of cemented carbide. Background technique [0002] Ultrafine cobalt powder is blue-gray powder, irregular crystal, used in cemented carbide and other fields. Ultrafine cemented carbide has excellent performance and is an important direction for the development of cemented carbide. Ultrafine cobalt powder must be added to produce ultrafine cemented carbide. Therefore, high-quality ultrafine cobalt powder is one of the important raw materials for producing ultrafine cemented carbide. Using ultra-fine cobalt powder can not only obtain high-quality cemented carbide, but also reduce the mixing time of ball milling and lower the sintering temperature. The development of ultra-fine cobalt powder is of great significance to the preparation of high-quality, precise and sharp cemented carbide products and the improvement of the industrial level of my...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
CPCB22F9/24
Inventor 陆娜盛开洋许丽君
Owner 常州瑞坦商贸有限公司
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