Thermo-Raman studies on dehydration of Na3PO4·12H2O
In: Thermochimica Acta, Jg. 371 (2001-04-26), Heft 1-2, S. 127-135
Online
serialPeriodical
Zugriff:
In this work, dehydration of Na3PO4·12H2O has been studied dynamically in detail by thermo-Raman spectroscopy. The dehydration was observed in the temperature range from 30 to 200°C. Spectral variation could distinguish six characteristic spectra of different hydrated species. The thermo-Raman intensity for the stretching bands of H2O showed four distinct steps of dehydration with Na3PO4·12H2O, Na3PO4·8H2O, Na3PO4·7H2O, Na3PO4·6H2O and Na3PO4·0.5H2O as the compositional species. The differential thermo-Raman intensity thermogram indicated the possibility of the existence of a new hydrated intermediate species Na3PO4·4H2O during the dehydration. The first four steps of dehydration occurred below 84°C and the last step of loosing 0.5 H2O could not be detected. The results of TG measurement showed only two stages of dehydration.
Titel: |
Thermo-Raman studies on dehydration of Na3PO4·12H2O
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Autor/in / Beteiligte Person: | Ghule, Anil ; Murugan, Ramaswamy ; Chang, Hua |
Link: | |
Zeitschrift: | Thermochimica Acta, Jg. 371 (2001-04-26), Heft 1-2, S. 127-135 |
Veröffentlichung: | 2001 |
Medientyp: | serialPeriodical |
ISSN: | 0040-6031 (print) |
DOI: | 10.1016/S0040-6031(00)00719-X |
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