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Dense fine-grained biphasic calcium phosphate (BCP) bioceramics designed by two-step sintering

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2011
Authors
Lukić, Miodrag J.
Stojanović, Zoran S.
Škapin, Srečo Davor
Maček Kržmanc, Marjeta
Mitrić, Miodrag
Marković, Smilja
Uskoković, Dragan
Article (Published version)
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Abstract
In this study, dense, fine-grained biphasic calcium phosphate bioceramics were designed via the two-step sintering method. The starting powder was nanosized calcium-deficient hydroxyapatite, whose phase composition, average particle size and morphology were characterized by XRD, FTIR, Raman spectroscopy, laser diffraction and FE-SEM. The phase transformations of the initial powder during heating up to 1200 °C were examined using TG/DSC. At first, conventional sintering was performed and the recorded shrinkage/densification data were used to find out the appropriate experimental conditions for two-step sintering. The obtained results show that two-step sintering yields BCP ceramics, consisting of hydroxyapatite and β-TCP, with full dense, homogeneous structure with average grain size of 375 nm. Furthermore, BCP ceramics obtained by the two-step sintering method exhibit improved mechanical properties, compared to conventionally sintered BCP.
Keywords:
grain growth / microstructure / apatite / two-step sintering
Source:
Journal of the European Ceramic Society, 2011, 31, 1-2, 19-27
Publisher:
  • Elsevier
Projects:
  • Molecular designing of nanoparticles with controlled morphological and physicochemical characteristics and functional materials based on them (RS-45004)

DOI: 10.1016/j.jeurceramsoc.2010.09.006

ISSN: 0955-2219 (Print); 1873-619X (Online)

WoS: 000284569900004

Scopus: 2-s2.0-78049467024
[ Google Scholar ]
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43
URI
http://dais.sanu.ac.rs/123456789/710
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  • ITN SANU - Opšta kolekcija / ITS SASA - General collection
Institution
Институт техничких наука САНУ / Institute of Technical Sciences SASA

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