By: tracy ma
Submitted: 2012-02-20 01:15:59 | Word Count: 526
Ultrafine nickel powder applies the chemical reduction method. Its raw material is nickel sulfate. The hydrazine becomes a reducing agent and in the alkaline liquid the ultrafine nickel powder is got. And transmission electron microscopy, scanning electron microscopy and X-ray nickel powder particle size, morphology and composition analysis showed that nickel powder particle size is about 0.2μm, the powder was irregular spherical and the surface zone with burrs, surface oxidation resistance good metal ultrafine powder as microwave absorbers have very important applications in the absorbing material. system mentioning that the ultrafine nickel powder mixed with silicon carbide as the absorbing filler in a different ratio, was prepared by absorbing coating materials, test frequency 2GHz-18GHz range, in the case of thickness less than 0.5mm, have gained a better absorbing performance: the absorption of electromagnetic waves (absolute value) greater than 20dB, which can absorb more than 99 percent of electromagnetic waves. It is able to achieve 29.5dB, the ultrafine nickel powder in the absorbing material to obtain a better application.
Ultrafine nickel powder medium frequency induction furnace to melt atomization method, waste angle is expected to produce high purity nickel mesh (Ni content ≥ 99.8%) particle size of 800 mesh and 800 mesh adjustable. The technology to solve the scrap mesh nickel net is not easy to form the magnetic field, causing the furnace to heat up the difficulties to reach the nickel melting temperature, the raw materials manganese powder contain impurities, pickling a long soak, and the acidification is not plug the spray chamber, the material uneven, the powder low purity is not high, mesh and low technical problems.
Ultrafine nickel powder for the production of more mobile phones, personal home computers, laptops, power tools and other electrical equipment in the multi-layer ceramic capacitors, and the industry's need for nickel-metal hydride battery. International market demand for nickel-metal hydride battery is average annual growth of 20%. In order to meet rapidly growing demand of the market, the United States, Japan and other countries continue to invest heavily to expand the production of nickel powder.
China's battery industry only on the nickel product demand has been more than 2000 tons in a few years before rising to about 4000 tons of nickel powder in China, especially the production of ultrafine nickel powder in terms of yield or quality can not meet the market needs. Therefore, many manufacturing enterprises mainly imports of ultrafine nickel powder as raw materials.
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Ultrafine nickel powder and nickel consumption in China occurred fundamental change. China's metallurgical nickels industry in 2010 is about 1.5 million tons. The consumption of nickel is 4000 tons in battery industry and catalyst industry consumed 5000 tons of nickel. The magnetic material uses 500 tons of nickel. Due to a long slow development, the metallurgical industry silicon powder has lag nickel consumption growth. The battery industry and catalyst industries with nickel consumption is at an alarming rate. The new industries have increasing demand for nickel product diversification. Chinese nickel production enterprises should seize this opportunity to increase technology efforts to develop their own.
Source:http://www.mhcmp.com
