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

被引：45

作者：

de Jager, HJ

Prinsloo, LC ^{[1
]}

机构：

[1] Univ Pretoria, Dept Chem, ZA-0002 Pretoria, South Africa

[2] Univ Pretoria, Inst Appl Mat, ZA-0002 Pretoria, South Africa

来源：

THERMOCHIMICA ACTA | 2001年 / 376卷 / 02期

关键词：

phosphates; Raman; TGA; DSC;

D O I：

10.1016/S0040-6031(01)00582-2

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

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. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：187 / 196

页数：10

共 12 条

[1] HYDROGEN-BONDING IN CRYSTALLINE STATE - CRYSTAL-STRUCTURE OF NAH-2PO-4.2H-2O BY X-RAY AND NEUTRON-DIFFRACTION [J].