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A kind of preparation method of superfine nickel powder

A technology of nickel powder and solution, which is applied in the field of preparation of ultrafine nickel powder for conductive electrodes, can solve the problems of high investment and energy consumption, difficulty in large-scale production, etc., and achieve reduced production costs, narrow particle size distribution, and reduced environmental impact. pollution effect

Inactive Publication Date: 2014-10-22
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires special equipment, and the investment and energy consumption are relatively large, so it is not easy to produce on a large scale.

Method used

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  • A kind of preparation method of superfine nickel powder
  • A kind of preparation method of superfine nickel powder
  • A kind of preparation method of superfine nickel powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of the ultrafine nickel powder provided by the present embodiment may further comprise the steps:

[0031] (1) Preparation of solution A: 15.77 grams of NiSO 4 ·6H 2 O, 0.18 gram of citric acid, 0.15 gram of copper sulfate and 1.00 gram of sodium tartrate were mixed with 100 mL of pure water in a reactor and dispersed evenly to prepare solution A, which was then heated to 70° C. for use;

[0032] (2) Preparation of solution B: Mix 3.00 grams of sodium hydroxide and 7.50 grams of hydrazine hydrate with a concentration of 80% by mass in a container, then add water to 50 mL, prepare solution B, and heat to 70°C for use;

[0033] (3) Solution A was heated in a constant temperature water bath at 70°C, and after stirring for 15 minutes, solution B was slowly added dropwise to solution A, and the reaction was continued for 10 minutes after solution B was added dropwise, and the obtained reaction solution was subjected to solid-liquid separation, The ob...

Embodiment 2

[0036] The preparation method of the ultrafine nickel powder provided by the present embodiment may further comprise the steps:

[0037] (1) Preparation of solution A: 15.77 grams of NiSO 4 ·6H 2 O. Mix 0.18 grams of citric acid, 0.15 grams of copper sulfate and 1.00 grams of sodium tartrate with 100 mL of pure water in a reactor, and disperse evenly to prepare solution A, which is then heated to 80° C. for use;

[0038] (2) Preparation of solution B: Mix 3.00 grams of sodium hydroxide and 7.50 grams of hydrazine hydrate with a concentration of 80% by mass in a container, then add water to 50 mL to prepare solution B, and heat to 80°C for use;

[0039] (3) Solution A was heated in a constant temperature water bath at 80°C, and after stirring for 15 minutes, solution B was slowly added dropwise to solution A, and the reaction was continued for 10 minutes after solution B was added dropwise, and the obtained reaction solution was subjected to solid-liquid separation, The obtai...

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Abstract

The invention relates to the technical field of metal materials, in particular to a preparation method of superfine nickel powder for a conductive electrode. The preparation method of the superfine nickel powder comprises the following steps of: mixing nickel salts NiSO4*6H2O or Ni(NO3)2 and the like, citric acid, a nucleating agent, a dispersant with water; agitating and uniformly dispersing to prepare a solution A; mixing sodium hydroxide with 80% of hydrazine hydrate; metering the volume by the water to prepare a solution B; putting the solution A into a constant-temperature water bath boiler and agitating; dripping the solution B into the solution A; continually reacting for 10 minutes after the solution B is dripped; carrying out solid-liquid separation on an obtained reaction solution; washing an obtained solid with the water for 2-3 times and then washing with absolute ethyl alcohol for 2-3 times; and then, drying in vacuum to obtain the superfine nickel powder. With the adoption of the preparation method of the superfine nickel powder disclosed by the invention, the prepared superfine nickel powder has the advantages of controllable grain diameter, small grain diameter, narrow grain diameter distribution, high crystallization degree, good dispersity, high density and good crystal form.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a preparation method of ultrafine nickel powder for conductive electrodes. Background technique [0002] Metal powder is an important basic raw material, which can be directly dispersed and used, or it can be pressed and sintered into a bulk material, and can also be made into a film material, etc. [0003] Taking the modern electronics industry as an example, multilayer ceramic capacitors (MLCC for short) in the modern electronics industry have become mainstream products in the capacitor industry, and are widely used in communication, computer and consumer electronics products. One of the main development directions of MLCC is the base metallization of electrodes, that is, the use of low-priced base metals to replace expensive palladium, silver and other precious metals to reduce costs. After base metallization, the internal electrodes can save 2 to 5 times the cost. Ul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 徐锐姚大虎许爱荣吴峰敏杜西刚郑金陈晓锐郭朝霞
Owner HENAN UNIV OF SCI & TECH