14960-16-8Relevant articles and documents
Co@CoSb Core-Shell Nanorods: From Chemical Coating at the Nanoscale to Macroscopic Consolidation
Sanyal, Udishnu,Ener, Semih,Anagnostopoulou, Evangelia,Pousthomis, Marc,Fazzini, Pier-Francesco,Lacroix, Lise-Marie,Skokov, Konstantin P.,Gutfleisch, Oliver,Viau, Guillaume
, p. 4982 - 4990 (2016/08/05)
Core-shell magnetic anisotropic particles were prepared by reduction of Sb acetate at the surface of cobalt nanorods dispersed in a solution consisting of 1,2 tetradecanediol in oleylamine. X-ray diffraction and local EDS analyses revealed a thin β-CoSb shell with a controlled thickness ranging from 5 to 15 nm that depended on the Sb/Co molar ratio and the reduction temperature. The shell completely coats the rod surface but does not alter the shape anisotropy or the hcp structure of the cobalt cores, and the hard magnetic properties are preserved after coating with a coercivity higher than 3 kOe. Consolidated nanostructured materials that exhibit properties of permanent magnets were prepared by compaction of the core-shell Co@CoSb nanorods. The thin CoSb shell was very efficient for preventing the cobalt anisotropic core from sintering at high temperatures (up to 300 °C) and high pressures (up to 1.5 GPa). These results indicate that the bottom-up approach is very promising for preparation of nanostructured hard magnetic materials.
Studies on the Behaviour of Cobalt and Calcium Soaps. Part I. Solubility Studies in Non-aqueous Solvents
Varma, R. P.,Jain, P. K.
, p. 98 - 100 (2007/10/02)
Solubilities of laureates and oleates of calcium and cobalt have been measured in organic solvents at temperatures 35-60 deg and the same has been found to increase with the rise in temperature showing a marked change at Krafft point.The values of heat of solution, ΔHs and entropy of solution, ΔSsol have been calculated.These parameters suggest the presence of soap micelles in the solutions above Krafft point.