Method for preparing hollow or clad nickel alloy spherical powder

A technology of spherical powder and nickel alloy, applied in the field of powder metallurgy, to achieve the effect of simple equipment and simple process operation

Inactive Publication Date: 2005-10-05
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this method is usually used to prepare inorganic compound powde

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1:

[0021] Preparation of Micron Hollow Spherical Nickel-Phosphorus Alloy Powder

[0022] Nickel sulfate, sodium hypophosphite, sodium hydroxide are mixed with deionized water respectively into nickel sulfate solution of 260g / L, sodium hypophosphite solution of 320g / L and sodium hydroxide alkali solution of 15g / L, three kinds of solutions At the same time, heat it in a constant temperature water bath at 90±1°C for 8 minutes, and add 5-10ml of 20g / L citric acid solution, 1-3ml of lactic acid, and 2-5ml of 10g / L thiourea to the nickel sulfate solution. Then pour sodium hydroxide into the nickel sulfate solution to obtain uniform nickel hydroxide colloid. Then pour the sodium hypophosphite solution into the nickel hydroxide colloid, put it back into the constant temperature water bath and heat it at the aforementioned temperature, while stirring continuously, then the reaction occurs, a large number of bubbles emerge, the reaction proceeds violently, and a large ...

Example Embodiment

[0023] Example 2:

[0024] Preparation of Nanoscale Coated Spherical Nickel-Phosphorus Alloy Powder

[0025] Dissolve nickel chloride, potassium hypophosphite and potassium hydroxide in deionized water respectively, prepare 100g / L, 150g / L and 60g / L solutions, put them in a constant temperature water bath at 90±1°C and heat for 6 minutes , and add 4-8ml of lactic acid, 2-5ml of adipic acid, and 1-3ml of 12g / L propenylthiourea to the nickel chloride solution. Then pour potassium hydroxide into the solution of nickel chloride to obtain uniform nickel hydroxide colloid, then pour the potassium hypophosphite solution into the nickel hydroxide colloid, put it back into the constant temperature water bath and heat it at the aforementioned temperature, and react for a period of time. After a period of time, a large amount of black precipitate appeared in the solution. Filter the obtained black precipitate, wash it, and dry it in an oven at 60°C for 2 hours. The particle size of the f...

Example Embodiment

[0026] Example 3:

[0027] Preparation of Micron Hollow Nickel-Cobalt Spherical Powder:

[0028] Prepare 200g of nickel sulfate and 20g of cobalt sulfate into 1L of composite metal salt solution, prepare hydrazine hydrate and sodium hydroxide into solutions of 70g / L and 12g / L respectively, put them in a constant temperature water bath at 55±1°C and heat for 7 Minutes, then pour sodium hydroxide into the composite metal salt solution to obtain a uniform hydroxide colloid, then pour the hydrazine hydrate solution into the colloid solution, put it back into the constant temperature water bath and heat it at the aforementioned temperature, a large amount of brown Black precipitate, filter the resulting precipitate, wash it, and dry it in an oven at 55°C for 2 hours. The particle size of the hollow nickel metal powder obtained is 0.5-1.5 μm. The nickel in the obtained powder is in a microcrystalline state, and it is obtained after hydrogen reduction Hollow spherical nickel-cobalt ...

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Abstract

The present invention method of hollow or coating type nickel alloy spherical powder includes the following steps: dissolving nickel salt, adding alkali liquor and reducing agent, utilizing alkaline colloidal kernel generated by self-body reaction as core, using the colloidal kernel surface as active center, self-catalyzing reducing agent and nickel iron reaction to form nickel alloy shell body on colloidal kernel surface, make after-treatment so as to obtain the hollow or coated type nickel alloy spherical powder. Said invention can be used in the fields of high-effective catalyst, adsorbing agent, photoelectric and electromagnetic device, microwave absorption material and bio-pharmaceutical industry, etc.

Description

technical field [0001] The invention relates to a preparation method of nickel alloy spherical powder, in particular to a preparation method of ultrafine hollow or coated nickel alloy spherical powder. It belongs to the technical field of powder metallurgy. Background technique [0002] In recent years, with the continuous deepening of research on the properties of nanomaterials and related preparation technologies, ultrafine structures with special morphology and functions often show excellent properties in chemistry, mechanics, optics, electricity, and magnetism. Ultrafine structures are expected to be widely used in military and civilian fields such as chemical industry, electronics, metallurgy, aviation, and medicine. Especially the ultrafine powder with hollow structure or coating structure, compared with solid powder, not only has all the advantages of solid ultrafine powder, but also because of its special structure, it is widely used in chemistry, optics, electromag...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 胡文彬邓意达沈彬刘磊
Owner SHANGHAI JIAO TONG UNIV
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