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- Title
Effect of calcination and structural additives on the EPR spectra of nanocrystalline cobalt oxides.
- Authors
Guskos, N.; Typek, J.; Maryniak, M.; Żołnierkiewicz, G.; Podsiadły, M.; Arabczyk, W.; Lendzion-Bieluń, Z.; Narkiewicz, U.
- Abstract
Samples of nanocrystalline Co3O4 were prepared at various calcination temperatures and with various amounts of structural additives (CaO and Al2O3). The samples were characterized by X-ray diffraction. The average size and size distribution of nanoparticles have been calculated. Electron paramagnetic resonance (EPR) spectra of the samples were recorded at room temperature. The spectra have been attributed to divalent cobalt ions. Samples calcinated at higher temperatures showed an almost symmetrical, intensive EPR line. Temperature of calcination determined the character of the EPR spectra. The intensities of EPR spectra depended on the presence of CaO and Al2O3 additives.
- Subjects
TEMPERATURE; X-ray diffraction; NANOPARTICLES; ELECTRON paramagnetic resonance; PARTICLES (Nuclear physics)
- Publication
Materials Science (0137-1339), 2006, Vol 24, Issue 4, p1095
- ISSN
0137-1339
- Publication type
Article