6 research outputs found
Solvent effects in square planar complexes: Kinetics of substitution at [1-(2-hydroxyphenyl)-3,5-diphenylformazanato]palladium(II) complexes
ADVANTAGES OF THE FLUIDIZED BED TECHNIQUE FOR THE PREPARATION OF HARD FERRITE POWDERS
On dĂ©crit la prĂ©paration de poudres de ferrite dur par rĂ©action Ă l'Ă©tat solide dans un lit fluidisĂ©. On rapporte les propriĂ©tĂ©s magnĂ©tiques et cĂ©ramiques de ces poudres, qui ont Ă©tĂ© prĂ©parĂ©es Ă partir d'oxydes de fer pigmentaires, soit rĂ©gĂ©nĂ©rĂ©s soit naturels. Les rĂ©sultats dĂ©montrent que la technique du lit fluidisĂ© peut ĂȘtre appliquĂ©e Ă la prĂ©paration d'aimants frittĂ©s et plastiques de hautes performances.Preparation of hexaferrite powders by means of a solid state reaction in a fluid bed furnace is described. Magnetic and ceramic properties of these compounds, which were prepared starting from pigmentary, regenerated and natural iron oxides are reported. Results show that the fluidized bed technique is suitable for high performance plastically bonded and ceramic magnets