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Process for preparing fibrous nickel powder

Inactive Publication Date: 2005-06-15
SHENZHEN NONFEMET TECH
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Problems solved by technology

[0002] The fibrous special nickel powder currently used is produced by the carbonyl method, which is carried out under high temperature and high pressure. The nickel carbonyl is flammable, explosive, toxic, and pollutes the environment during the production process, and the particle size of the product can only reach the micron level. , the scope of application is limited

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  • Process for preparing fibrous nickel powder
  • Process for preparing fibrous nickel powder
  • Process for preparing fibrous nickel powder

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Embodiment Construction

[0020] figure 1 The preparation process of fibrous nickel powder is described:

[0021] ① The soluble nickel salt solution and the composite precipitant solution are fed into the reactor from different containers in parallel through the spray feeding device. 2+ -NH 3 -NH 4 + -Cl - -C 2 o 4 2 -H 2 The O system undergoes complex precipitation conversion, the temperature is controlled at 55-85°C, the pH is 7.0-9.0, and the initial Ni in the feed solution 2+ The concentration is 0.4~1.2mol / l;

[0022] ② The composite precipitate obtained after the reaction is completed is washed, filtered and dried to become the nickel powder precursor;

[0023] ③Put the nickel powder precursor into a PID-regulated electric furnace, control the temperature at 350-600°C, and 2 +N 2 ) under the atmosphere control to carry out thermal decomposition;

[0024] ④ After the thermal decomposition is completed, the nickel powder is cooled and the surface is anti-oxidized to room temperature, a...

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Abstract

The invention is a preparation process of powder metallurgy materials, which is characterized in that: the precipitation conversion thermal decomposition method is adopted, and Ni under normal temperature and pressure 2+ -NH 3 -NH 4 + -Cl - -C 2 o 4 2- -H 2 The precursor synthesis process of nickel powder preparation in the O system, and the subsequent thermal decomposition process are safe, reliable, non-toxic and pollution-free; the nickel powder produced by the present invention is fibrous, nano-sized, porous, large specific surface area, and anti-oxidation Strong ability to meet a variety of performance requirements.

Description

technical field [0001] The invention is a preparation process of powder metallurgy material. Background technique [0002] The fibrous special nickel powder currently used is produced by the carbonyl method, which is carried out under high temperature and high pressure. The nickel carbonyl is flammable, explosive, toxic, and pollutes the environment during the production process, and the particle size of the product can only reach the micron level. , the scope of application is limited. The new Ni-Cd batteries, Ni-MH batteries, Li-Ion batteries, especially MCFC fuel cells all need a lot of nickel powder: Contents of the invention [0003] The object of the present invention is to overcome the weak point of above-mentioned method, and a kind of preparation method of nickel powder is provided. The method is safe, reliable, non-toxic and non-polluting; the fibrous nickel powder prepared has high purity, small particle size, and large specific surface area, which meets the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/00
Inventor 张传福邬建辉黎昌俊戴曦湛菁
Owner SHENZHEN NONFEMET TECH
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