【Chinatungsten】tungsten copper electrolytic process

Processing

In the process of electrolyzation, use a certain proportion of NaCl, KCl, Na2WO4 and CuO4 mixed solution and graphite as electrode, the spacing electrode is 3cm, temperature controlled at 780 ℃ -800 ℃. Under 0.5V-1.0V voltage reactants pre-electrolysis 1.5-2.0h voltage and adjusted to 2.5V-3.3V, continuous electrolysis 3h.

The electrolysis product was boiled with distilled out, after the addition of an appropriate amount of NaOH solution for soaking, filtering and drying to obtain final product. Finally, use X-ray diffraction analysis, scanning electron microscopy and energy dispersive spectroscopy to analyze the product phase, morphology and granularity.

Advantages

Copper particles are dispersed more evenly, no agglomeration occurs, smaller than the copper tungsten particles adhere to the larger particles of copper particles and is more tightly wrapped. The average copper tungsten powder particle sizes up to 0.9μm, sintering meets the industrial requirements totally.

【Chinatungsten】Tungsten copper spark plasma sintering

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【Chinatungsten】tungsten-copper-sol-gel-method

Introduction

Tungsten copper sol gel method with hydrolysis and polymerization basic reaction, which are in preparation of high purity at a low temperature, evenly distributed, high chemical activity of single and multi-component mixtures. It is a metal alkoxide and its compounds as raw materials, under certain conditions hydrolysis medium and catalyst - the polycondensation reaction solution into a gel, and then by drying and heat treatment method of obtaining synthetic materials.

Processing

Compared with conventional sintering method, sol gel method products with high uniformity and high purity, the temperature is 400℃~500℃ lower than conventional sintering method, the reaction process is easy to control, can greatly reduce the side effects of the new phase formed. At the same time, this kind of method solve the mechanical mixing powder prepared tungsten copper composite powder particle size is too large, mechanical impurities, tungsten copper mixing uneven and other issues.

【Chinatungsten】tungsten-copper-spray-drying-method

Introduction
Tungsten copper spray drying method also called thermo-chemical synthesis method involves the preparation of the original solution and mixing, spray drying and fluid bed conversion in three stages. It is the solution to obtain chemical and physical atomized ultrafine particles by the method of combining physical means.

Process
Tungsten copper precursors prepared by spray drying a powder is generally spherical hollow shell, spray dried powders must be converted to a fluidized bed to give the corresponding metal composite powder. First, a variety of mixed metal salt solution to obtain a mixed solution, such as ammonium paratungstate or ammonium metatungstate and other metals Cu, Ni, Fe is mixed into the aqueous metal salt solution after the atomizer.

The spray from the nozzle into the drying chamber to obtain high speed metal salt particles, collected after firing, to obtain ultrafine particles nanocrystalline oxide composite powder precursors, shaped like a spherical shell-like powder. Then the precursor powder under certain conditions through the reduction or charring, to obtain the desired component monopropellant, multi-component alloy composite powder or carbide.