偏磷酸盐
热重分析
材料科学
磷酸盐
铝
热稳定性
热分解
降级(电信)
等温过程
热分析
分解
无机化学
核磁共振波谱
核化学
分析化学(期刊)
化学
冶金
热的
有机化学
气象学
物理
热力学
电信
计算机科学
作者
Guillaume Rousseau,Lionel Montagne,François Méar
标识
DOI:10.1016/j.jeurceramsoc.2021.03.023
摘要
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 POH 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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