Simultaneous evaluation of linear shrinkage and electrical behavior of electroceramics during sintering
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2017
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CONGRESSO BRASILEIRO DE CERAMICA, 61.
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Sintering a ceramic green pellet promotes microstructural evolution from packed particles composed of adjoined particles and pores to a consolidated body composed of grains and interfaces. As the impedance spectroscopy technique allows for detecting the main components of a ceramic body by separating in the frequency domain the electrical resistivity of each component, a sample inserted in a dilatometer was connected, via platinum electrodes and leads, to an impedance analyzer. The connection to the impedance analyzer could also be switched to a power supply for flash sintering experiments. In situ electrochemical impedance spectroscopy measurements of yttria-stabilized zirconia and yttrium/zirconium-doped barium cerate were performed during conventional and flash sintering experiments. The analysis of the impedance spectroscopy diagrams under heating (before either conventional or electric field-assisted sintering) and under cooling (after) provides evidence of densification with pore elimination and welding of grains.
Como referenciar
MUCCILLO, R.; MUCCILLO, E.N.S. Simultaneous evaluation of linear shrinkage and electrical behavior of electroceramics during sintering. In: CONGRESSO BRASILEIRO DE CERAMICA, 61., 04-07 de junho, 2017, Gramado, RS. Resumo... p. 1497-1497. Disponível em: http://repositorio.ipen.br/handle/123456789/28095. Acesso em: 30 Dec 2025.
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