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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 1    March 1999

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PREPARATION OF Co50Ni50ULTRAFINES BY CO-REDUCTION OF SOLUTION IN PRESENCE OF POLYMER①
Chen Zuyaoa,b, Zhang Guochunc, Zhu Yuruib, Jiang wanquanb and Tang Xinlud

Structure Research Laboratorya, Department of  Chemistryb,Department of Applied Chemistryc, Department of  Mechanicsd,University of Science and Technology of China, Hefei 230026, P. R. China

Abstract:The reduction reaction of aqueous Co2+-hydrazine, which cannot be conducted under the common condition, is carried out by using both of low-temperature heating and stirring. Metallic ultrafines are prepared by this method. In the presence of polyvinyl alcohol (PVA), it is absorbed on the surface of particles of the product and forms a structure of complex particle, which is favorable to the stability of the powder size distribution. Co50Ni50 magnetic alloy ultrafines with fcc-cubic system can also be prepared from Co2+-Ni2+ hybrid solution by the same method in the presence of PVA. The effect of PVA amount on the particle size and the stability of Co50Ni50 alloy ultrafines are emphatically discussed.

 

Key words: Co50Ni50 magnetic alloy ultrafines Co-reduction of solution polymer(CRSPP)

ISSN 1672-7029
CN 43-1423/U

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