| Autor: |
Cardenas-Flechas, L. J., Raba, A. M., Barba-Ortega, J., Moreno, L. C., Joya, M. R. |
| Předmět: |
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| Zdroj: |
Journal of Inorganic & Organometallic Polymers & Materials; 2021, Vol. 31 Issue 1, p121-128, 8p |
| Abstrakt: |
Agglomerates of Co 3 O 4 were obtained using the sol–gel method for the synthesis with subsequent calcination of the samples up to 550 °C. Through X-rays it was observed that the samples presented the pure spinel phase with a crystallite size between 33.73 and 41.45 nm. In the thermogravimetric measurement from 262 °C high structural stability is presented with phase change at 917 °C. As the temperature increases, the particles increase in size, observing agglomerated nanometer particles that increase with temperature (3.5–3.8 μm). The 683 cm - 1 Raman mode for 550 °C clearly presents an shifted compared to the other samples. The band gap for the samples under study varied with the temperature change of 1.77–1.81 eV. The FWHM decreases at a higher temperature, this confirms the larger crystallite size and the higher degree of sintering. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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