DEVELOPMENT OF GELS FROM THE SYSTEM NA2O- AL2O3-BI2O3-P2O5 AND THEIR STRUCTURAL-ANALYSIS VIA NMR AND IR SPECTROSCOPY

Authors
DRAOUI M AOMARI K IDRISSI MS BENARAFA L MAIRESSE G PALAVIT G MONTAGNE L
Citation
M. Draoui et al., DEVELOPMENT OF GELS FROM THE SYSTEM NA2O- AL2O3-BI2O3-P2O5 AND THEIR STRUCTURAL-ANALYSIS VIA NMR AND IR SPECTROSCOPY, Canadian journal of analytical sciences and spectroscopy, 43(1), 1998, pp. 19-26
Citations number
38
Categorie Soggetti
Spectroscopy,"Chemistry Analytical
Journal title
Canadian journal of analytical sciences and spectroscopy → ACNP
ISSN journal
12056685
Volume
43
Issue
1
Year of publication
1998
Pages
19 - 26
Database
ISI
SICI code
1205-6685(1998)43:1<19:DOGFTS>2.0.ZU;2-5
Abstract
Different gels in the (50-x)Na2O-0.52xAl(2)O(3)- 0.48xBi(2)O(3)-(50-x) P2O5 system, where 7.7 less than or equal to x 34.4 were prepared. The gel formation occurred with cc molar ratio of P/(Al+Bi) = 2.25. The N MR spectra showed that the triphosphate aluminium complex predominates in Bi+3 containing gels whereas the diphosphate is present in the gel s formed solely from Al+3. IR spectroscopy was used to monitor the the rmic evolution of the gels between 20 and 600 degrees C. The phosphate chains appear to be hydrolysed at 200 degrees C but recondense before 600 degrees C.