Characteristics of synthetic hydroxyapatites and attempts to improve their thermal stability

A. Tampieri, G. Celotti, S. Sprio, C. Mingazzini

Research output: Contribution to journalArticle

57 Scopus citations

Abstract

Synthetic hydroxyapatites (HA) with widely different crystallinity degrees were prepared starting from calcium hydroxide and phosphoric acid. The powders were carefully characterized by various physico-chemical techniques. Additions of Ca(OH)2 were performed in order to improve HA thermal stability to firing treatments up to temperatures significantly higher than those commonly employed for safe HA sintering. A positive effect in this sense was found, yielding HA almost pure samples up to 1400-1450 °C and maintaining considerable HA concentrations up to 1600 °C. An explanation in terms of stoichiometric defectiveness, linked to the quantitatively estimated contemporary presence of HPO4 2- and CO3 2- substituting PO4 3- and OH-, was attempted.

Original languageEnglish (US)
Pages (from-to)54-61
Number of pages8
JournalMaterials Chemistry and Physics
Volume64
Issue number1
DOIs
StatePublished - Mar 31 2000

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Characteristics of synthetic hydroxyapatites and attempts to improve their thermal stability'. Together they form a unique fingerprint.

Cite this