Dispersing behavior of hydroxyapatite powders produced by wet-chemical synthesis

Michele Pretto, Anna Luisa Costa, Elena Landi, Anna Tampieri, Carmen Galassi

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


Three hydroxyapatite powders with different surface properties were produced by wet-chemical synthesis and characterized. The electrokinetic properties of powders dispersed in water were investigated by electroacoustic spectroscopy measurements. The different surface reactivity (pHiep and ζ potential versus pH curves) was related to the interplay of dissolution and adsorption of Ca2+ ions. With a view toward the preparation of porous bodies by sponge impregnation, the behavior of powder suspensions was studied. Four deflocculants were tested, and the optimum dispersing conditions for each powder were found. Anionic polyelectrolytes resulted in the best effective dispersing agent, with different optimum amounts added to the suspensions.

Original languageEnglish (US)
Pages (from-to)1534-1539
Number of pages6
JournalJournal of the American Ceramic Society
Issue number9
StatePublished - Jan 1 2003

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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