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Preparation method of nanometer sized superfine ferro nickel alloy powder

A nickel-iron alloy, nano-level technology is applied in the field of preparation of nano-level ultra-fine nickel-iron alloy powder, which can solve the problems of inability to large-scale production, serious environmental pollution, large equipment investment, etc. The effect of narrow particle size distribution

Inactive Publication Date: 2005-03-16
UNIV OF SCI & TECH BEIJING
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aqueous solution reduction method can produce nano-scale (<100nm) nickel powder, but the cost is too high to be mass-produced
The carbonyl method is recognized in the world as an ideal method for producing ultrafine (0.5-6 μm) nickel powder and nickel-iron alloy powder, but its process is complicated, equipment investment is large, and environmental pollution is serious. Atomization methods (gas atomization, high pressure Water atomization), and the Hamita cyclone milling method, can only produce nickel powder and nickel-iron alloy powder with a coarse particle size of 50-200 μm
None of the above methods can produce nanoscale nickel powder and nickel-iron alloy powder cheaply

Method used

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  • Preparation method of nanometer sized superfine ferro nickel alloy powder
  • Preparation method of nanometer sized superfine ferro nickel alloy powder
  • Preparation method of nanometer sized superfine ferro nickel alloy powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: When preparing 1 kg of nano-nickel-iron alloy powder, the composition is Ni:Fe=3:1, it should be completed according to the following steps.

[0049] 1. Weigh 1244.52 grams of FeSO 4 ·7H 2 O and 3357.8 g NiSO 4 ·6H 2 Add the O powder into 10 liters of distilled water, heat it to 60°C and stir continuously, after it is completely dissolved, use a 40μm sieve to filter out foreign impurities, and then transfer the solution into the atomizing liquid tank.

[0050] 2. Airflow ultrasonic spray heat conversion, using annular seam resonant airflow ultrasonic atomizing nozzle with injection angle α = 45°, injection pressure (air) 2.5MPa, hot air temperature 128°C, airflow injection speed 2-2.5 Mach number, liquid flow The delivery speed is 200ml / min. After the solution is completely atomized, the dry precursor powder can be obtained, and it will be transferred to the repeated cleaning stage.

[0051] 3. Repeated cleaning and centrifugation. The precursor powder...

Embodiment 2

[0057] Example 2 To prepare 10kg of nano-nickel-iron alloy powder, the alloy composition is Ni: Fe=3: 1, it should be completed according to the following steps.

[0058] 1. Weigh Ni(NO 3 ) 2 ·6H 2 O, 37.1487kg; Fe(NO 3 ) 3 9H 2 O, 18.0851kg, crystal powder, added to 120 liters of distilled water, heated to 50°C in a stainless steel reaction tank, stirred continuously and completely dissolved, then poured the solution into the liquid tank of the atomization tower through a 44μm screen filter pipe with a liquid pump Perform spray heat transfer.

[0059] 2. Airflow spray heat conversion

[0060] Use a circular slot resonant airflow ultrasonic atomizing nozzle with a spray angle of α = 45°, spray pressure (air) 3.5MPa, hot air temperature 68°C, liquid flow delivery speed 200ml / min, and dry precursor can be obtained after the solution is completely atomized The body powder is transferred to the roasting process.

[0061] 3. Put the precursor powder obtained in the above 2 ...

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Abstract

The invention relates to a method of making nanometer ferronickel powder. Transform ferronickel sulfate solution or ferronickel azotate solution into nanometer NiO.FeO powder by low temperature supersound atomization hot transformation. Then wash the powder carefully, remove acid radical and the remnants water by centrifugation or heating to get the dry composite oxide. Then deoxidize the powder with hydrogen in tubing furnace at the low temperature of 650-700DEG C. Using the method, compound of the ferronickel is decided on the solution compound, and is well-proportioned. Grain size of average particle is equal as or bigger than 80mm. the particle is round and suited to mass production.

Description

technical field [0001] The invention belongs to the technical field of preparation of metal powder in metal materials, and in particular provides a preparation method of nano-scale ultrafine nickel-iron alloy powder, which is suitable for industrial production of nano-scale and nickel-iron alloy powder. Background technique [0002] Nano-nickel powder and nano-nickel-iron alloy powder are widely used in nickel-hydrogen fuel cells, ultrafine metal filter materials, stealth coatings, chemical catalysts, memory alloys, superconducting alloys, magnetic materials, spray alloys, hard alloys, artificial Diamond catalyst alloys, diamond cutting tool materials, cermet materials, etc. In recent years, with the rapid development of high technology, the demand for nano-nickel-iron alloy powder at home and abroad is increasing, with a rapid growth rate of 23% per year. From the literature search in the past 15 years, it can be seen that the existing production methods of nickel powder a...

Claims

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Application Information

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IPC IPC(8): B22F9/00B22F9/22
Inventor 吴成义张丽英
Owner UNIV OF SCI & TECH BEIJING
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