Acoustic wave stimulation of low temperature ceramic reactions: The system Al₂O₃−P₂O₅−H₂O

Acoustic energy has been primarily used in materials research to disaggregate solids and/or disperse them in fluids. It has also been used in a few studies to influence or cause new reactions in organic and organometallic systems. However, the potential of acoustic energy in the area of inorganic reactions and materials science has been virtually unexploited. We report herein new effects of acoustic waves in catalyzing reactions in the systems Al₂O₃ + H₂O and Al₂O₃ + P₂O₅ + H₂O. In this study the effect of different alumina precursors and their particle size on their reactivity with water and H₃PO₄ was investigated when exposed to 20 kHz waves.