[Synthesis and characteristic of cobalt bearing ferrite particles at room temperature].
Cobalt bearing magnetite particles were synthesized by aerial oxidation of ferrous and cobalt ions at alkaline condition and room temperature. The samples obtained at different time intervals during reaction were subjected to XRD and IR, and it was indicated that the cobalt-bearing ferrites were produced through green-rust intermediate phase. Different compounds were synthesized using 1/20, 1/15, 1/10, 1/7, 1/5 and 1/3 Co2+/Fe2+ starting ratios, and Co-ferrites with Co/Fe of 0.05, 0.06, 0.08, 0.12, 0.17, 0.18 were obtained. The chemical composition, microstructure and micrograph of those precipitates were characterized by chemical analysis, IR, XRD and SEM. The results revealed that Co2+ replaced Fe3+ at octahedral position in spinel structure, and the increase of Co in initial solution showed deleterious effect on the crystallinity of the precipitates.
Wang
Jing
J
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China.
Deng
Tong
T
Feng
Ya-ping
YP
Dai
Yu-jie
YJ
D000465:Algorithms; D003035:Cobalt / Q000737:chemistry*; D005290:Ferric Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D052203:Ferrosoferric Oxide / Q000138:chemical synthesis / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D010316:Particle Size; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014961:X-Ray Diffraction
D005290:Ferric Compounds; C001215:ferrite; D003035:Cobalt; D052203:Ferrosoferric Oxide