Metal nickel powder and preparation method thereof

A technology of metal nickel powder and nickel powder, which is applied in the field of metal nickel powder and its preparation, can solve problems such as gaps and incomplete nickel powder, and achieve the effects of long service life, simple production equipment, and uniform particles

Inactive Publication Date: 2010-09-22
湘潭九鼎金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 1600479A and Chinese patent CN 1765550A all disclose the method for preparing nickel powder by pyrolytic reduction of nickel oxalate, but the indicators of the nickel powder announced by these patents are either not comprehensive, or compared with the requirements of the electronic industry for nickel powder. There is a certain gap

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  • Metal nickel powder and preparation method thereof
  • Metal nickel powder and preparation method thereof
  • Metal nickel powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: the preparation of metallic nickel powder

[0036] Specific steps

[0037] 1. Put the 0# nickel plate in 10% dilute nitric acid solution for pretreatment to remove surface impurities, and then dissolve it in nitric acid with a concentration range of 60% to make nickel nitrate with a concentration range of 1.35-1.45g / ml saline solution;

[0038] 2. Filtrate the nickel nitrate salt solution, remove impurities, add oxalic acid solution with a concentration range of 35%, and keep stirring to obtain nickel oxalate precipitation;

[0039] 3. Wash the nickel oxalate precipitate with ionized water, dry it at 100°C for 3-4 hours, put the nickel oxalate precipitate into the nickel boat and place it in the reduction furnace, control the temperature at 400 plus or minus 5°C, and put the oxalic acid under the control of the hydrogen atmosphere Nickel reduction takes 120 minutes, and the reduction time normally fluctuates around 10 minutes;

[0040] 4. Mill the pyrol...

Embodiment 2

[0044] Embodiment 2: the preparation of metal nickel powder

[0045] Specific steps

[0046] 1. Pretreat the nickel plate in 10% dilute nitric acid solution to remove surface impurities, and then dissolve it in 60% nitric acid to make a nickel nitrate salt solution with a concentration range of 1.35-1.45g / ml ;

[0047] 2. Filtrate the nickel nitrate salt solution, remove impurities, add oxalic acid solution with a concentration range of 35%, and keep stirring to obtain nickel oxalate precipitation;

[0048] 3. Wash the nickel oxalate precipitate with ionized water, dry at 100°C for 3-4 hours, put the nickel oxalate precipitate into a nickel boat and place it in a reduction furnace, control the temperature at 425 plus or minus 5°C, and oxalate under the control of a hydrogen atmosphere Nickel reduction takes 120 minutes, and the reduction time normally fluctuates around 10 minutes;

[0049] 4. The pyrolysis reduction product is crushed with a high-energy stirring ball mill f...

Embodiment 3

[0053] Embodiment 3: the preparation of metal nickel powder

[0054] Specific steps

[0055] 1. Pre-treat the nickel plate in 10% dilute nitric acid solution to remove surface impurities, and then dissolve it in 60% nitric acid to make a nickel nitrate salt solution with a concentration range of 1.35-1.45g / ml ;

[0056] 2. Filtrate the nickel nitrate salt solution, remove impurities, add oxalic acid solution with a concentration range of 35%, and keep stirring to obtain nickel oxalate precipitation;

[0057] 3. Wash the nickel oxalate precipitate with ionized water, dry at 100°C for 3-4 hours, put the nickel oxalate precipitate into the nickel boat and place it in the reduction furnace, control the temperature at 450 plus or minus 5°C, and put the oxalic acid under the control of the hydrogen atmosphere Nickel reduction takes 120 minutes, and the reduction time normally fluctuates around 10 minutes;

[0058] 4. The pyrolysis reduction product is crushed with a high-energy s...

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Abstract

The invention relates to the field of preparing metal powder, and discloses metal nickel powder and a preparation method thereof. The high-purity nickel powder is prepared by a nickel oxalate pyrolysis reduction method which comprises the following steps of: firstly, dissolving a pretreated nickel plate in nitric acid to prepare nickel salt solution; secondly, adding oxalic acid solution into thenickel salt solution to obtain a nickel oxalate deposit; thirdly, washing and drying the nickel oxalate deposit, and then putting the nickel oxalate deposit into a reduction furnace; and finally, reducing the nickel oxalate deposit under the regulation and control of a hydrogen atmosphere to obtain the high-purity nickel powder. The high-purity nickel powder prepared by the method has the characteristics of uniform particles, high apparent density, stable quality and the like, is suitable for serving as an electric vacuum material and a metal ceramic material, and is particularly suitable forserving as a material for preparing a klystron or a radar thyratron of a speed electron-positron collider.

Description

technical field [0001] The present invention relates to a metal nickel powder and its preparation method, more specifically to a kind of nickel with a particle size between +250 mesh and 325 mesh, which has a high bulk ratio and good fluidity, and is suitable as an electric vacuum material and a cermet material. powder and its preparation method. Background technique [0002] In recent years, with the development of the electronics industry, the market demand for high-purity nickel powder for cathode material coating has been rising, especially for nickel powder suitable for electron-positron collider klystrons. Due to the high requirements for various production technologies, It has become the focus of attention of metal powder manufacturers. [0003] At present, the preparation methods of high-purity nickel powder are mainly electrolytic method and pyrolytic reduction method. The electrolysis method has been used in industrial production due to the high purity and unifor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22B22F1/00C22C19/03
Inventor 张抗谭成波陈志良
Owner 湘潭九鼎金属材料有限公司
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