Nanoscale conversion of chlorapatite (cas 1306-04-3) into hydroxyapatite using ultrasound irradiation

Add time:08/14/2019    Source:sciencedirect.com

The ultrasound-assisted conversion of chlorapatite (cas 1306-04-3) nanoparticles obtained from a natural phosphate rock into hydroxyapatite nanocrystals was achieved within one hour. The process had no significant impact on particle crystallinity but led to a significant decrease of the colloidal size. Similar variations were obtained for hydroxyapatite nanoparticles treated in the same conditions, suggesting that these variations are not due to the compositional modification. Analyses of the solubility properties of the two phases and of the ionic contents of the reaction medium suggest that the undersaturated conditions of the reaction and the cavitation phenomena favor surface exchange and erosion mechanisms over bulk amorphization.

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