Influence of process conditions on hydroxyapatite crystallinity obtained by direct crystallization

• Main Authors: M.M. Seckler, M. Danese, S. Derenzo, J.V. Valarelli, M. Giulietti, R. Rodríguez-Clemente
• Format: Article
• Language: English
• Published: Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) 1999-04-01
• Series: Materials Research
• Subjects: hydroxyapatite; bioceramic; biomaterial crystallization precipitation
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14391999000200003

Crystallization from solutions was applied to produce stoichiometric and crystalline hydroxyapatite (HAP) suitable for use as a biomaterial. This was accomplished by keeping a low supersaturation through the following procedure: semi-continuous operating mode, slow reactant addition rate and addition of a calcium complexing agent. A high temperature (90 °C) and probably carbonate incorporation also favored the formation of a well crystallized material. A qualitative correlation was found between the supersaturation and HAP properties such as crystallinity and particle size.