Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/31556
Título: Ionic conductivity and mixed-ion effect in mixed alkali metaphosphate glasses
Palavras-chave: Differential scanning calorimetry
Complex impedance spectroscopy
Raman spectroscopy
Calorimetria de varrimento diferencial
Espectroscopia de impedância complexa
Espectroscopia Raman
Data do documento: 2017
Editor: Royal Society of Chemistry
Citação: TSUCHIDA, J. E. et al. Ionic conductivity and mixed-ion effect in mixed alkali metaphosphate glasses. Physical Chemistry Chemical Physics, Cambridge, v. 19, n. 9, p. 6594-6600, 2017.
Resumo: In this work, mixed alkali metaphosphate glasses based on K–Na, Rb–Na, Rb–Li, Cs–Na and Cs–Li combinations were studied by differential scanning calorimetry (DSC), complex impedance spectroscopy, and Raman spectroscopy. DSC analyses show that both the glass transition (Tg) and melting temperatures (Tm) exhibit a clear mixed-ion effect. The ionic conductivity shows a strong mixed-ion effect and decreases by more than six orders of magnitude at room temperature for Rb–Na or Cs–Li alkali pairs. This study confirms that the mixed-ion effect may be explained as a natural consequence of random ion mixing because ion transport is favoured between well-matched energy sites and is impeded due to the structural mismatch between neighbouring sites for dissimilar ions.
URI: https://pubs.rsc.org/en/content/articlelanding/2017/cp/c6cp07876a#!divAbstract
http://repositorio.ufla.br/jspui/handle/1/31556
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