Abstract
Boria–alumina mixed oxides were synthesized by the sol-gel method. MAS-NMR spectroscopy spectra exhibited two boron species, BO 3 and BO 4, the former giving an important second order quadrupolar effect. Then, spectra were interpreted with a simulation software which permitted quantitative evaluation of boron species in both dried and calcined states. Tetrahedral Al species formed in the dried state appear to monitor BO 4 and BO 3 species formation in both dried and calcined states.
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