Impedance spectroscopy of SnO2: CoO during sintering
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Materials Letters
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SnO2 : m mol% Co0 (0.5 <= m <= 6.0) ceramic specimens were studied by impedance spectroscopy in the 5 Hz-13 MHz
frequency range during heating cold-pressed specimens from room temperature to 1250°C. The electrical resistivity during
sintering decreases from 4 to 6 orders of magnitude in the 400-1.500 K temperature range depending on the amount of COO.
An increase in electrical resistivity in the 570-670 K range is related to the release of adsorbed water. The results for the
970-1500 K show that the higher the amount of the Co0 addition, the lower is the temperature at which SnO, : Co0 reaches
a minimum electrical rlzsistivity. This suggests that oxygen point defects created by dissolution of cobalt ions in the SnO,
lattice are controlling the densification rate of these ceramics.
Como referenciar
MUCCILLO, R.; CERRI, J.A.; LEITE, E.R.; LONGO, E.; VARELA, J.A. Impedance spectroscopy of SnO2: CoO during sintering. Materials Letters, v. 30, n. 1, p. 125-130, 1997. DOI: 10.1016/S0167-577X(97)80001-8. Disponível em: http://repositorio.ipen.br/handle/123456789/26720. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.