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Preparing method for nano-copper powder

A technology of nano-copper powder and copper nitrate, which is applied in the field of nano-material preparation, can solve the problems of uneven particle size, wide particle size distribution range, and low yield, and achieve good dispersion, narrow particle size distribution range, and high yield. high effect

Active Publication Date: 2014-04-30
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the product Cu powder obtained by the above-mentioned liquid phase reduction method has a wide particle size distribution range, uneven particle size, and low yield.

Method used

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  • Preparing method for nano-copper powder
  • Preparing method for nano-copper powder
  • Preparing method for nano-copper powder

Examples

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Effect test

Embodiment 1

[0028] Such as figure 1 As shown, this example prepares nano-copper powder according to the following steps: a mixture of copper nitrate and graphite with a molar ratio of 1:1 is used as a raw material; 50 g of the above raw material is added to 100 ml of acrylamide (AM) with a concentration of 20 wt. Organic monomer and N,N-methylenebisacrylamide (MBAM) crosslinking agent (wherein the mass ratio of organic monomer to crosslinking agent is m (AM) :m (MBAM) =20:1) in the organic monomer solution, after 24h ball milling and mixing to obtain a suspension; add 2.5ml catalyst tetramethylethylenediamine and 1ml initiator ammonium persulfate saturated solution (1.5wt%) to the suspension, and placed in a constant temperature water bath at 80°C for 1 hour to obtain a wet gel; place the wet gel in a blast oven at 120°C to dry and dehydrate for 3 hours to obtain a xerogel; calcinate the xerogel at a temperature of 300°C 3h, obtained by CuO 2 Precursor powder formed by mixing with Cu; ...

Embodiment 2

[0031] Such as figure 1 As shown, this example prepares nano-copper powder according to the following steps: a mixture of copper nitrate and graphite with a molar ratio of 3:1 is used as a raw material; 50g of the above-mentioned raw material is added to 150ml of acrylamide (AM) with a concentration of 20wt.%. Organic monomer and N,N-methylenebisacrylamide (MBAM) crosslinking agent (wherein the mass ratio of organic monomer to crosslinking agent is m (AM) :m (MBAM) =25:1) in the organic monomer solution, mixed by ball milling for 24 hours to obtain a suspension; add 1.25ml catalyst tetramethylethylenediamine and 0.5ml initiator ammonium persulfate saturated solution (1.5wt%) to the suspension , and placed in a constant temperature water bath at 60°C for 2 hours to obtain a wet gel; place the wet gel in a blast oven at 105°C to dry and dehydrate for 5 hours to obtain a dry gel; dry the dry gel at a temperature of 350°C Calcined for 2h, obtained by CuO 2 Precursor powder form...

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Abstract

The invention discloses a preparing method for nano-copper powder. The preparing method for the nano-copper powder is characterized by comprising the following steps that a mixture composed of copper nitrate and graphite serves as a raw material, the raw material is added into an organic monomer solution, suspension liquid is obtained through ball milling, and then the suspension liquid is gelatinized under the action of an initiating agent and a catalyst to obtain wet gel; the wet gel is dried to obtain dried gel; the dried gel is calcined to obtain hybrid precursor powder composed of copper dioxide and copper; reduction is performed on the hybrid precursor powder in a hydrogen gas atmosphere to obtain the nano-copper powder. According to the preparing method for the nano-copper powder, required raw materials are low in price and easy to obtain, the process is simple, the protection condition of high pressure or inert atmosphere in the reaction process is not required, the method does not have special requirements for a reaction device, production cost is greatly lowered, and therefore the method is applicable to industrial production. The productive rate of the nano-copper powder manufactured through the method is high and can reach more than 96 percent, and the obtained product is of a similar spherical shape and has the advantages that the degree of purity is high, the range of particle size distribution is narrow, agglomeration does not exist, and dispersity is good.

Description

technical field [0001] The invention belongs to the field of nanometer material preparation, and in particular relates to a method for preparing nanometer copper powder. Background technique [0002] Nano-copper powder refers to tiny copper particles whose particle size distribution ranges from 1 to 100 nm. Due to its small size effect, surface interface effect, quantum tunneling effect and other characteristics, nano copper powder has many unique physical and chemical properties, and has broad application prospects in powder metallurgy, conductive paste, lubrication, catalysis and other fields, especially in The application of conductive paste and lubricating oil has become a research hotspot for scholars. Nano-copper powder has good plasticity and excellent anti-friction and wear-reducing properties. Using nano-copper powder as a lubricating oil additive can greatly improve its lubricating performance. At the same time, with the rapid increase in the price of precious me...

Claims

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Application Information

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IPC IPC(8): B22F9/22
Inventor 程继贵叶楠敏陈闻超刘岩李剑峰
Owner HEFEI UNIV OF TECH
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