Ultra-fine nickel powders with different morphologies and sizes are synthesized in ethanol water solution by liquid phase reduction method. The well-defined ultra-fine nickel powders are prepared by changing the concentration of aqueous solution of nickel salt and sodium hydroxide, or by changing the mole ratio between reactants and the reaction temperature. Under the conditions that copper sulfate as a nucleating agent, citric acid as a complexing agent, sodium tartrate as a dispersant, ultrafine nickel powders are obtained. The resulting products are characterized by scanning electron microscopy (SEM). It is found that the mole ratio between reactants, the concentration of reactants and reaction temperature have much effect on the morphologies and sizes of nickel powder, and it is concluded that the nickel powders with different morphologies can be prepared by adjusting them. The resulting product is spherical nickel powder and the particle size range is between 200-1000 nm. It is more evenly distributed.

Ethanol and water ratio is 2:8 at systems. The copper sulfate is the nucleating agents. Air sulfoxide / Ni 2 + mole ratio of 0.001, citric acid / molar ratio Ni 2 + African 0001, sodium hydroxide concentration of 1.5 mole / 50 volume of sodium tartrate, 10 g / 50, hydrazine hydrate / mole Ni 2 + 3.0, 80 ° to 100, the concentration of nickel sulfoxide 0.8 mol / l of nickel powders of spherical particles, the particle size of 300 nm, best results.

So developed plans for different ultrafine particles. Secondly, the different needs of different, or a small part of the range you can choose from a variety of physical, chemical and integrated appearance. Ultrafine nickel powder has a large standby power cookies, battery materials, catalytic materials, magnetic materials, preparation of care studies. Over the years that cell phones, computers, communication and other equipment, the rapid development of the increasing demand for finer nickel powder. There are different areas of nickel powder, using a variety of performance requirements and, therefore, their methods of preparation, but the implementation is due to the modern mode of production for metal powder exporter.

ADDED liquid phase, nickel sulphate, hydrazine and spherical ultrafine nickel powder reduction process to prepare a variety of research. Research, including a fine nickel powder, onion - water systems, by means of electron microscopy, sees the mass, shape.

Evenly distribute the particles of copper sulfate as a nucleating agent, the smaller the particle size of the spherical particle size of 0.3 microns in average, well distributed. Uneven nucleating agent obtained particle size control sulfoxide, spherical, the average particle size of 2 hours. As a nucleating agent is selected, the sulfoxide to compare the effects of air greater than idea ones.

Nickel sulfoxide concentration is 0.4 mole / 50 at 80 ℃ with more uniform particle size distribution. They are spherical particles and the particle size is 0.3 um on average. They are well dispersed with the best results. With the increase of the concentration of nickel sulfoxide, nickel powder particle’s size changes in irregularly rules. Source:http://www.mhcmp.com