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Method for preparing superfine simple-substance nickel powder

A technology of elemental nickel and preparation steps, applied in the field of preparation of ultrafine elemental nickel powder, can solve the problems of bad crystal form of nickel powder, long reaction time, cumbersome operation, etc. simple effect

Active Publication Date: 2014-04-16
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Problems solved by technology

Although above-mentioned these methods have realized the chemical preparation of superfine nickel powder, there are also some problems, such as the nickel powder crystal form prepared by the hydrothermal method is not good, and the microemulsion method needs to add surfactant and co-surfactant, and the cost is relatively high. High, the hydrazine hydrate in the hydrazine hydrate reduction method is a highly toxic substance, the polyol reduction method requires a long reaction time, the precipitation method needs to add a precipitant, and the soft template method needs to be calcined to remove the template, the follow-up workload is large, and the operation is cumbersome

Method used

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  • Method for preparing superfine simple-substance nickel powder

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preparation example Construction

[0019] The operation steps of this preparation method are:

[0020] First, add nickel oxide or nickel salt into the reactor, discharge the air in the reactor, then add a solvent medium into the reactor, and heat the reactor so that the temperature reaches 100-350°C and the pressure is 0.1-30MPa. And keep it in this state for 0.05 ~ 2h; then keep the temperature constant, release the pressure in the reactor to 0 ~ 2 MPa within 0.05 ~ 1.5 h, cool the reactor to room temperature, take out the solid in the reactor Powder, ultrafine elemental nickel powder can be obtained after ultrasonic dispersion, washing and vacuum drying. The raw material is one or more mixtures of nickel oxide, nickel acetate, nickel nitrate, nickel carbonate, and basic nickel carbonate; the solvent medium includes one or two mixtures of methanol and ethanol; the reaction temperature is controlled at 100-350 ℃; the reaction pressure is controlled at 0.1-30MPa, the reaction time is controlled at 0.05-2h; the ...

Embodiment 1

[0022] Take 6.0g of nickel acetate and place it in a reactor with a volume of 0.15L, seal the reactor and then evacuate it to 0.01MPa, add 100g of methanol, heat the reactor to 180°C, the pressure is 8.4MPa, and then react under these conditions After 0.6h, the pressure at the end of the reaction was reduced to 0.1 MPa. After cooling to room temperature, the product in the reactor was taken out, ultrasonically vibrated for 5 minutes, washed three times with deionized water and anhydrous methanol, and vacuum-dried at 60°C. The obtained product was 1.4g.

Embodiment 2

[0024] Add nickel nitrate hydrate (4.0g) into the pressure-resistant reactor, and take out the air in the reactor. After adding 60g of ethanol, raise the temperature of the reactor to 235°C and the pressure to 12.0 MPa, and keep it under this condition for 1h. Then the pressure was lowered to 1.3 MPa within 0.5 h. After cooling down, the product in the reactor was taken out. After ultrasonic dispersion, it was washed several times with deionized water and anhydrous methanol successively, and dried in vacuum. The obtained product was 0.75 g.

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Abstract

The invention relates to a method for preparing nickel powder, in particular to a method for preparing superfine simple-substance nickel powder. The method comprises the following steps that reaction materials are added to a reactor, the reactor is heated to 100-350 DEG C, pressure reaches 0.1-30MPa, and the reactor is kept for 0.05-2h under the condition; under the condition that the temperature is not changed, the pressure of the reactor is reduced to 0-2MPa, solvents are filtered out, heating is stopped, the reactor is cooled to indoor temperature, products are taken out, and ultrasonic dispersion, washing and vacuum drying are carried out on the products to obtain the superfine simple-substance nickel powder. The preparing method is short in reaction time, low in reaction temperature and free of pollution. The whole process is simple in process. The preparing method is strong in raw material applicability. The adopted raw materials are low in price. The prepared products are easy to separate, and the obtained simple-substance nickel is controllable in particle diameter and good in dispersibility.

Description

technical field [0001] The invention relates to a preparation method of nickel powder, in particular to a preparation method of ultrafine elemental nickel powder. Background technique [0002] Ultrafine materials are new functional basic materials developed in the mid-1980s. It has great application value in mechanics, electricity, magnetism, chemistry, chemical industry, aerospace and other fields. As a kind of ultrafine metal powder, ultrafine nickel powder has the characteristics of nanomaterials such as small size, high surface energy and large specific surface area. In addition, it also has good electrical conductivity and magnetism, so it has better performance than other materials in many aspects. Better properties of regular size material. These properties make it show extremely broad application prospects in the fields of metallurgy, electronics, chemical industry, aerospace and national defense research. At present, there are many methods for preparing ultrafin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 李双明牛明举葛新宁志高于三三李文秀
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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