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Phase behaviour of the solid proton conductor CsHSO4

E. Ortiz ; R. A. Vargas ; Bengt-Erik Mellander (Institutionen för teknisk fysik, Fasta tillståndets fysik)
Journal of Physics Condensed Matter (09538984). Vol. 18 (2006), 42, p. 9561-9573.
[Artikel, refereegranskad vetenskaplig]

The sequence of previously found phase transitions in CsHSO4 at around 60, 122, and 141 °C was carefully examined by using thermo-gravimetric analysis (TGA), mass spectroscopy (MS), differential thermal analysis, ac calorimetry, impedance spectroscopy, and x-ray diffraction (XRD). Our results show evidence that at all these transition temperatures, the dehydration processes take place at or very near the surface of the crystal. As a consequence, our results support the phase of CsHSO4 above 141 °C being not a superprotonic-conducting phase but rather a mixture of CsHSO4 and Cs2S2O7 caused by a partial thermal decomposition that includes the break-up of hydrogen bonds and the formation of H2O molecules.

Denna post skapades 2009-12-04.
CPL Pubid: 102835


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Institutioner (Chalmers)

Institutionen för teknisk fysik, Fasta tillståndets fysik (2005-2015)


Teknisk fysik

Chalmers infrastruktur