Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7898429 | Journal of the European Ceramic Society | 2018 | 32 Pages |
Abstract
A simple, soft, and fast microwave-assisted hydrothermal method was used for the preparation of nanocrystalline cobalt ferrite powders from commercially-available Fe(NO3)3â9H2O, Co(NO3)2â6H2O, ammonium hydroxide, and tetrapropylammonium hydroxide (TPAH). The synthesis was conducted in a sealed-vessel microwave reactor specifically designed for synthetic applications, and the resulting products were characterized by XRD, FE-SEM, TEM, and HR-TEM. After a systematic study of the influence of the microwave variables (temperature, reaction time and nature of the bases), highly crystalline CoFe2O4 nanoparticles with a high uniformity in morphology and size, were directly obtained by heating at 130â¯Â°C for 20â¯min using the base TPAH. Dense ceramics of cobalt ferrite were prepared by non-conventional, microwave sintering of synthesized nanopowders at temperatures of 850-900â¯Â°C. The magnetic properties of both the nanopowders and the sintered specimens were determined in order to establish their feasibility as a permanent magnet.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
J.C. Fariñas, R. Moreno, A. Pérez, M.A. GarcÃa, M. GarcÃa-Hernández, M.D. Salvador, A. Borrell,