Production for nanometer nickel powder

A nano-metal and nickel powder technology, which is applied in the field of preparation of nano-metal nickel powder, can solve the problems of reaction heating and cumbersome operation

Inactive Publication Date: 2005-07-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The nickel sulfate solution prepared by this method needs to be adjusted to a pH value of 8-10 with ammonia water and dilute sulfuric acid, and a dispersant (which kind of dispersant is not specified in

Method used

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  • Production for nanometer nickel powder
  • Production for nanometer nickel powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Press W NaOH :W NiCl2·6H2O =2:1; M N2H4·H2O : M NiCl2·6H2O =4.8:1; W NaBH4 :W NiCl2·6H2O =1.6‰:1. 4.2gNiCl 2 ·6H 2 O was dissolved in 15.8ml 95% ethanol aqueous solution to form solution A; 8.4g NaOH was added to 8.5ml hydrazine hydrate solution with a mass percentage of 50%, and stirred to form a paste mixture B; 0.3351g NaBH 4 Be dissolved in 10ml distilled water and be made into solution C (NaBH in following each embodiment 4 The concentration of the solution is the same as in this example). Take 0.2ml NaBH 4 solution, added to solution A to induce the reaction, then quickly add the pasty mixture B to the above solution, stir with a magnetic stirrer, the reaction proceeds quickly, and the black precipitate generated during the reaction is washed with distilled water, and then washed with ethanol After washing, replacing, dehydrating and drying, the nano metal nickel powder is obtained.

[0021] Analysis of residual Ni in the filtrate by atomic absorption s...

Embodiment 2

[0024] Press W NaOH :W NiCl2·6H2O =1.1:1; M N2H4·H2O : M NiCl2·6H2O =1.9:1; W NaBH4 :W NiCl2·6H2O =0.8‰:1. 4.2g NiCl 2 ·6H 2 O was dissolved in 13.6ml of 95% aqueous ethanol to form solution A; 4.5g of NaOH was added to 3.4ml of 50% by mass hydrazine hydrate solution, and stirred to form a pasty mixture B. Take 0.1ml NaBH 4 solution, added to solution A to induce the reaction, then quickly add the pasty mixture B to the above solution, stir with a magnetic stirrer, the reaction proceeds quickly, and the black precipitate formed in the reaction is washed with distilled water, and then washed with ethanol After washing, replacing, dehydrating and drying, the nano metal nickel powder is obtained.

[0025] The BET specific surface area is 129m 2 / g, D is about 6nm.

Embodiment 3

[0027] Press W NaOH :W NiCl2·6H2O =2:1; M N2H4·H2O : M NiCl2·6H2O =4.8:1; W NaBH4 :W NiCl2·6H2O =0.8‰:1. 4.2g NiCl 2 ·6H 2 O was dissolved in 15.8ml of 95% aqueous ethanol to form solution A; 8.4g of NaOH was added to 8.5ml of 50% by mass hydrazine hydrate solution, and stirred to form a pasty mixture B. Take 0.1ml NaBH4 solution, added to solution A to induce the reaction, then quickly add the pasty mixture B to the above solution, stir with a magnetic stirrer, the reaction proceeds quickly, and the black precipitate generated during the reaction is washed with distilled water, and then washed with ethanol After washing, replacing, dehydrating and drying, the nano metal nickel powder is obtained.

[0028] The BET specific surface area is 49m 2 / g, D is about 14nm.

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Abstract

A process for preparing the Ni nanoparticles includes such steps as adding the solution of sodium borohydride to the alcohol solution of nickel chloride, reacting, adding the pasty mixture of sodium hydroxide and hydrazine hydrate, reacting, separating the product, washing and drying. Its advantages are high purity, uniform and controllable granuality, and high specific surface area.

Description

1. Technical field [0001] The invention relates to a preparation method of nano metal nickel powder, which belongs to the field of nano technology. 2. Background technology [0002] Nano-nickel powder is widely used in catalysts, conductive pastes, sintering activators, batteries, hard alloys, etc. due to its small particle size, large specific surface area, high reactivity, and good electrical and thermal conductivity. At present, the main methods for preparing nano-nickel powder are: nickel carbonyl thermal decomposition method, evaporation-condensation method, alloy method, gas reduction method, electrolysis method, mechanical pulverization method and liquid phase reduction method. Among these methods, the liquid-phase reduction method has become an important synthetic method for the preparation of nano-nickel powder due to its advantages such as easy availability of raw materials, easy control of composition, small particle size of the product, and controllable particle ...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 沈俭一李智渝韩承辉
Owner NANJING UNIV
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