Preparation method of metal and alloy hollow powder

A hollow powder and alloy technology, applied in the field of hollow powder manufacturing, can solve the problems of weak reactivity, oxidation phenomenon, long reaction time, etc., and achieve the effects of less evaporation loss, more products, and a wider range of applications

Inactive Publication Date: 2015-09-23
SHAOXING UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using the original method to prepare cobalt or copper hollow powder, due to the weak reactivity of these materials, the reaction time is very long (several hours or even longer), the evaporation loss of the solution is very serious, the oxidation phenomenon is serious, and the final reaction product is very small.

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[0015] The invention provides a method for preparing metal and alloy hollow powder, which comprises the following steps. Dissolve an appropriate amount of main salt, sodium hypophosphite and sodium hydroxide in deionized water to prepare a 50-200ml solution. The concentration of the main salt solution is 0.2-1.0 mol / L, and the concentration of the sodium hypophosphite solution is 0.3 ~3.0 mol / L, the concentration of sodium hydroxide solution is 0.5~3.0 mol / L, the main salt is the sulfate or chloride salt corresponding to the hollow powder material to be prepared, and the main salt is a single metal salt or multiple metal salts mixture. Sodium hydroxide (NaOH) and sodium hypophosphite (NaH 2 PO 2 ·H 2 O) as alkali and reducing agent in the preparation method respectively. The raw materials used are of analytical grade.

[0016] In a specific embodiment, the main salt can be sulfate of cobalt, chloride of cobalt, sulfate of nickel, chloride of nickel, sulfate of iron, chlor...

Embodiment 1

[0027] Embodiment one: prepare single metal hollow powder

[0028] Nickel sulfate or chloride is used as the main salt.

[0029] (1) Dissolve an appropriate amount of main salt, sodium hypophosphite and sodium hydroxide in deionized water, and prepare a 200ml solution in a beaker. The concentration of the main salt solution is 0.5 mol / L, and the concentration of the sodium hypophosphite solution is 1.0 mol / L, the concentration of sodium hydroxide solution is 0.8 mol / L;

[0030](2) Pour the main salt solution into a three-necked flask from one mouth, put the three-necked flask into an oil bath at 80°C for preheating, and put the other two solutions into the same oil bath for preheating, and the preheating time is 5 minutes ;

[0031] (3) Slowly pour the sodium hydroxide solution into a three-necked flask from one side, and simultaneously use a mechanical stirring rod to stir at a speed of 800 rpm for 5 minutes;

[0032] (4) Add appropriate amount of stabilizer to prevent col...

Embodiment 2

[0036] Embodiment 2: Preparation of cobalt metal hollow powder.

[0037] Cobalt sulfate is used as the main salt.

[0038] (1) Dissolve an appropriate amount of main salt, sodium hypophosphite and sodium hydroxide in deionized water, and prepare a 50ml solution in a beaker. The concentration of the main salt solution is 1 mol / L, and the concentration of the sodium hypophosphite solution is 3.0 mol / L, the concentration of sodium hydroxide solution is 3 mol / L;

[0039] (2) Pour the main salt solution into a three-necked flask from one mouth, put the three-necked flask into an oil bath at 120°C for preheating, and put the other two solutions into the same oil bath for preheating, and the preheating time is 5 minutes ;

[0040] (3) Slowly pour the sodium hydroxide solution into the three-necked flask from one side, and simultaneously use a mechanical stirring rod to stir at a speed of 800 rpm for 10 minutes;

[0041] (4) Add appropriate amount of stabilizer to prevent colloidal...

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Abstract

The invention provides a metal and alloy hollow powder preparing method. The method comprises the steps that a proper amount of main salt, sodium hypophosphite and sodium hydroxide are dissolved in deionized water to obtain a 50-200ml solution, and the solution concentration of the main salt, the sodium hypophosphite and the sodium hydroxide is 0.2-1.0mol / L, 0.3-3.0mol / L and 0.5-3.0mol / L respectively; a mechanical stirring rod is placed in the middle mouth of a three-mouth flask, the mail salt solution is poured into the three-mouth flask through an edge port, the three-mouth flask is placed in an oil bath which is 80-150 DEG C to be preheated, and the other two solutions are placed in the same oil bath to be preheated for 3-5min at the same time; the sodium hydroxide solution is poured into the three-mouth flask slowly through the edge port and then stirred for 5-10min with the mechanical stirring rod at a speed of 100-1000rpm; a proper number of stabilizers are added to prevent colloid decomposition; the sodium hypophosphite solution is poured into the three-mouth flask through the edge port and then stirred for 1-8h with the mechanical stirring rod at a speed of 100-500rpm till reaction ends.

Description

technical field [0001] The invention belongs to the field of hollow powder production, and in particular relates to a method for preparing metal and alloy hollow powders. Background technique [0002] With the in-depth research on material science and preparation technology, more and more inorganic or organic materials with hollow structures have been developed. In addition to taking advantage of the light weight of hollow materials (compared to solid counterparts) and applying them to traditional lightweight fillers or discharges, hollow materials have also begun to emerge in some emerging fields, such as the cavity of hollow materials. The special microenvironment is used as a carrier for chemical microreactors, biological media, drug missiles and controlled release of drugs, etc.; using the hollow material, a special core-shell particle, in terms of electrical and magnetic properties and its structural stability Adjustability of properties such as denaturation and electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 李志彬倪鹤南邓意达
Owner SHAOXING UNIVERSITY
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