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Micro-nano copper powder and preparation method thereof

A micro-nano, copper powder technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the performance of the reduction process is difficult to control well, the preparation repeatability is not ideal, and the product is conductive. impact, etc.

Active Publication Date: 2017-03-22
GUANGZHOU QIANSHUN IND MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using a strong reducing agent such as hydrazine hydrate, due to its relatively strong reducing ability, it is difficult to control the reduction process well. Therefore, problems such as poor particle uniformity, unsatisfactory preparation repeatability, and unstable batches of products are prone to occur.
If a weak reducing agent is used, although the reduction rate is relatively easy to control and the shape of the copper powder product is easy to control, it is prone to incomplete reduction and the existence of equal impurities, which will have a serious impact on the electrical conductivity of the product.

Method used

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  • Micro-nano copper powder and preparation method thereof

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Effect test

Embodiment 1

[0093] The preparation method of a kind of micronano copper powder of the present embodiment, it comprises the following steps:

[0094] (1) Weigh 0.15 g of copper chloride and dissolve it in 500 mL of water to make a solution, add 224 g of potassium hydroxide under strong stirring conditions, and keep stirring for 4 hours at 60 ° C to obtain system A;

[0095] (2) Weigh 0.2 g of citric acid, 3 g of ascorbic acid, 0.5 mL of ammonia water, 0.1 g of PVA, 0.3 g of lysine and 10 mL of methanol and dissolve them in 200 mL of water, add them to system A to obtain system B, and put system B at 90 ° C Under the conditions, the reaction was continued for 48 hours, the reaction was stopped, the reactants were centrifuged, washed repeatedly, and finally dried in a vacuum oven to obtain a sample-copper powder A.

[0096] Adopt scanning electron microscope to observe the morphology of sample-copper powder A, the result sees figure 1 ,From figure 1 It can be seen that the copper particles...

Embodiment 2

[0098] The preparation method of a kind of micronano copper powder of the present embodiment, it comprises the following steps:

[0099] (1) Weigh 6.0 grams of copper chloride and dissolve it in 500 mL of water to make a solution, add 340 grams of potassium hydroxide under strong stirring conditions, and keep stirring for 4 hours at 60°C to obtain system A;

[0100] (2) Weigh 3.2 grams of citric acid, 50 grams of ascorbic acid, 30 grams of maltose, 1 mL of ammonia water, 2 mL of diethylenetriamine, 1 gram of PVA and 15 mL of ethanol and dissolve them in 200 mL of water, and add them to system A to obtain system B. Under the condition of 90°C, the reaction was continued for 48h. The reaction was stopped, and the reactants were centrifuged, washed repeatedly, and finally dried in a vacuum oven to obtain a sample-copper powder B.

[0101] Adopt scanning electron microscope to observe the morphology of sample-copper powder B, the results can be found in figure 2 ,From figure ...

Embodiment 3

[0103] The preparation method of a kind of micronano copper powder of the present embodiment, it comprises the following steps:

[0104] (1) Weigh 125 grams of copper sulfate and dissolve it in 1000 mL of water to make a solution, add 400 grams of sodium hydroxide, 10 grams of sodium carbonate and 6 grams of urea under strong stirring conditions, and continue stirring for 12 hours at 60 ° C to obtain System A;

[0105] (2) Weigh 50 grams of D-xylose, 340 grams of lactose, 200 grams of sucrose, 10 grams of ammonium chloride, 5 grams of glutamic acid, 3 grams of PEG and 30 mL of ethanol, dissolve them in 1000 mL of water, add them to system A to obtain the system B, the temperature of system B was rapidly raised to 130°C by microwave heating, the reaction was continued for 2 minutes, and the reaction was stopped. The reactant was filtered, washed repeatedly, and finally dried in a vacuum oven to obtain sample-copper powder C.

[0106] Adopt scanning electron microscope to obser...

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Abstract

The invention discloses micro-nano copper powder and a preparation method thereof. The preparation method comprises the following steps that compounds containing copper are prepared into a solution, and a system A is obtained; pH conditioning agents, additives and reducing agents are added to the system A, and a system B is obtained and reacts at 50-100 DEG C; and filtration, washing and drying are conducted after reacting, and the micro-nano copper powder is obtained. In the system B, the molarity of the compounds containing copper is 0.001-4 mol / L, the concentration of hydroxyl ion (OH-) is 10<-4>-20 mol / L, the mass concentration of the additives is 0-40%, and the molar ratio of the compounds containing copper to the reducing agents is 1:0.1-100. According to the preparation method, the effective control over the morphology and the size of the micro-nano copper powder is achieved, and the mass content of the impurity phases in the prepared copper powder can be controlled below 0.3%; and in addition, the preparation method further has the advantages that the reaction process is easy to control, and the selected reducing agents are moderate in reducibility, non-toxic, and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of copper powder preparation, in particular to a micronano copper powder and a preparation method thereof. Background technique [0002] Micro-nano copper powder is fuchsia or maroon ultrafine particles. Due to the characteristics of surface interface effect, small size effect and quantum size effect, it has many physical and chemical properties that conventional copper materials do not have. Chemistry and other aspects show great application prospects, and are widely used in lubrication, electronic information, medicine, biological filters and other fields. [0003] For example, ultrafine copper powder can be used in thick film pastes to replace precious metals. Thick film paste is the basis of thick film technology and is widely used in the manufacture of resistors, multilayer ceramic capacitors and hybrid integrated circuits. Thick film paste is composed of superfine and well-dispersed metal powder, glass powder ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00B82Y30/00
Inventor 苏红霞王权超田耕
Owner GUANGZHOU QIANSHUN IND MATERIAL
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