MUCCILLO, R.CERRI, J.A.LEITE, E.R.LONGO, E.VARELA, J.A.2016-09-272016-09-271997MUCCILLO, R.; CERRI, J.A.; LEITE, E.R.; LONGO, E.; VARELA, J.A. Impedance spectroscopy of SnO2: CoO during sintering. <b>Materials Letters</b>, v. 30, n. 1, p. 125-130, 1997. DOI: <a href="https://dx.doi.org/10.1016/S0167-577X(97)80001-8">10.1016/S0167-577X(97)80001-8</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/26720.0167-577Xhttp://repositorio.ipen.br/handle/123456789/26720SnO2 : 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.125-130openAccesstin oxidescobalt oxideselectric conductivityspectroscopydilatometrysinteringceramicsdoped materialsimpedancematerials testingArtigo de periódico13010.1016/S0167-577X(97)80001-8https://orcid.org/0000-0002-8598-279X