The dehydration of phosphates monitored by DSC/TGA and in situ Raman spectroscopy

Phosphates can be thermally dehydrated to polyphosphates or metaphosphates. This is an important reaction in the preparation of glasses, catalysts and flame retardants. In this study, we have monitored the dehydration process of potassium and sodium dihydrogen phosphates, using in situ Raman spectro...

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Bibliographic Details
Published inThermochimica acta Vol. 376; no. 2; pp. 187 - 196
Main Authors de Jager, Henk-Jan, Prinsloo, Linda C.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 07.09.2001
Elsevier Science
Subjects
Chemistry
DSC
Exact sciences and technology
Inorganic chemistry and origins of life
Phosphates
Preparations and properties
Raman
Salts
TGA
Phosphates
Raman
DSC
TGA
Differential scanning calorimetry
Potassium Dihydrogenphosphates
In situ
Thermogravimetry
Raman spectrometry
Thermal analysis
Dehydration
Sodium Dihydrogenphosphates
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Summary:Phosphates can be thermally dehydrated to polyphosphates or metaphosphates. This is an important reaction in the preparation of glasses, catalysts and flame retardants. In this study, we have monitored the dehydration process of potassium and sodium dihydrogen phosphates, using in situ Raman spectroscopy, thermal analysis, X-ray powder diffraction and infrared spectroscopy. We obtained a good correlation between the thermal data and the structural phase transitions observed during the reactions, using Raman and infrared spectroscopy. Deuteration of the samples assisted us in assigning some of the vibrational bands.
ISSN:0040-6031
1872-762X
DOI:10.1016/S0040-6031(01)00582-2