Title :
Chemical synthesis of nanostructured cobalt at elevated temperatures
Author :
Leslie-Pelecky, Diandra L. ; Bonder, M. ; Martin, T. ; Kirkpatrick, E.M. ; Zhang, X.Q. ; Kim, S.-H. ; Rieke, Reuben D.
Author_Institution :
Nebraska Univ., Lincoln, NE, USA
fDate :
7/1/1998 12:00:00 AM
Abstract :
Chemical synthesis is a versatile technique for fabricating novel nanostructured materials. In the Rieke process, a metal salt is reduced by an alkali in a hydrocarbon solvent to form small, highly reactive particles. Synthesis at an elevated temperature (200°C) increases the as-synthesized particle size and produces higher coercivities and remanence ratios than observed in similar syntheses at room temperature. The ratio of synthesis temperature to solvent boiling point appears to be an important parameter in both coercivity and oxidation resistance
Keywords :
cobalt; coercive force; corrosion protection; ferromagnetic materials; magnetic particles; materials preparation; nanostructured materials; oxidation; particle size; remanence; 200 C; Co; Rieke process; as-synthesized particle size; chemical synthesis; coercivities; elevated temperatures; highly reactive particles; hydrocarbon solvent; metal salt; nanostructured cobalt; nanostructured materials; oxidation resistance; remanence ratios; solvent boiling point; synthesis temperature; Chemicals; Cobalt; Coercive force; Crystalline materials; Crystallization; Magnetic materials; Nanostructured materials; Solvents; Temperature; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
