Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1297661 | Solid State Ionics | 2006 | 5 Pages |
Abstract
Phase transitions and thermal history in Cs2(HSO4)(H2PO4) were analyzed using powder X-ray diffraction method. A high-temperature phase (phase HT), which is a superprotonic phase, was retained on cooling even after 7 days in dry gas atmospheres at 298 K (room-temperature). On the other hand, phase HT did not transform to an original room-temperature phase (phase RT) but to another phase under room temperature and air atmosphere with 60% humidity. The new phase can be the same as the previously reported phase RT2 by means of 1H NMR [S. Hayashi, M. Mizuno, Solid State Ionics 176 (2005) 745.]. It is revealed that water vapor in atmosphere affects the phase transition, resulting in these large thermal histories.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Satoshi Takeya, Shigenobu Hayashi, Hiroshi Fujihisa, Kazumasa Honda,