Further insights on the thermal degradation of aluminum metaphosphate prepared from aluminum dihydrogen phosphate solution - Université de Lille
Article Dans Une Revue Journal of the European Ceramic Society Année : 2021

Further insights on the thermal degradation of aluminum metaphosphate prepared from aluminum dihydrogen phosphate solution

Résumé

A study of the high temperature (up to 1200°C) degradation of aluminum metaphosphate Al(PO3)3 has been carried out to evaluate the stability of this compound used for many purposes. For the preparation of Al(PO3)3, an aluminum dihydrogen-phosphate Al(H2PO4)3 solution has been heated at 700°C. Thermal degradation of Al(PO3)3 has been followed through the measurement of weight loss on isothermal mode at 1000 and 1200°C and by thermogravimetric analysis coupled with mass spectroscopy (TGA-MS). Structural data have been obtained by 27Al, 31P and 1H MAS NMR spectroscopy. NMR analyses have shown that [A] and [B] allotropic forms of Al(PO3)3 are formed after the preparation procedure. In addition, NMR revealed that hydroxyls groups are also present in the sample, and they form P-OH groups. TGA-MS showed that they are decomposed at a temperature of 875°C, while the decomposition of Al(PO3)3 into AlPO4 and P2O5 begins at 1000°C.
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Dates et versions

hal-04313264 , version 1 (29-11-2023)

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Guillaume Rousseau, Lionel Montagne, François Mear. Further insights on the thermal degradation of aluminum metaphosphate prepared from aluminum dihydrogen phosphate solution. Journal of the European Ceramic Society, 2021, Journal of the European Ceramic Society, 41 (9), pp.4970-4976. ⟨10.1016/j.jeurceramsoc.2021.03.023⟩. ⟨hal-04313264⟩
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