INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
artículos
Título:
Synthesis of nanocrystalline hydroxyapatite from Ca(OH)2 and H3PO4 assisted by ultrasonic irradiation
Autor/es:
MARINA A. GIARDINA, MARÍA A. FANOVICH
Revista:
CERAMICS INTERNATIONAL
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2010 vol. 36 p. 1961 - 1969
ISSN:
0272-8842
Resumen:
This work is focused on the synthesis of
hydroxyapatite powders by precipitation assisted by a tip ultrasonic
irradiation (UI) from Ca(OH)2
and H3PO4. The effect of UI time, applied UI power
during the synthesis, initial Ca2+
concentration and
ageing time of the mixture on phase composition, morphology and specific
surface area of the obtained powders was analysed. Particles obtained from the
precipitation method using UI or mechanical agitation were compared with a
nanosized hydroxyapatite of reference in terms of crystal size, phase
composition and thermal
stability. This study revealed the
feasibility to produce hydroxyapatite powders with controlled crystal size
between 31.7 and 70.6 nm by ultrasonic assisted precipitation method.
Hydroxyapatite powder with similar surface area to the reference material can
be obtained adjusting experimental conditions. The used method allowed us to
synthesise hydroxyapatite powders with thermal stability up to 1100 8C.
# 2010
Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Keywords: A. Powders: chemical preparation; D.
Apatite; E. Biomedical applications