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The p–T phase diagram for new ferroelectric bis-thiourea pyridinium bromide
- Source :
-
Journal of Chemical Thermodynamics . Apr2013, Vol. 59, p182-187. 6p. - Publication Year :
- 2013
-
Abstract
- Abstract: The effects of temperature and pressure on physical properties of the ferroelectric inclusion compound bis-thiourea pyridinium bromide were studied by dielectric spectroscopy, neutron and X-ray diffractometry and nuclear magnetic resonance (NMR). The results permitted a construction of the p–T phase diagram for this compound. At ambient pressure bis-thiourea pyridinium bromide exists in three phases and the ferro-ferroelectric phase transition observed at T 2 =150K is discontinuous in contrast to the ferro-paraelectric phase transition observed at T 1 =180K. The application of pressure of about 800MPa at room temperature and then cooling of this compound to below T= 160K induces the appearance of a new phase (IV). [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00219614
- Volume :
- 59
- Database :
- Academic Search Index
- Journal :
- Journal of Chemical Thermodynamics
- Publication Type :
- Academic Journal
- Accession number :
- 85745360
- Full Text :
- https://doi.org/10.1016/j.jct.2012.12.012