Synthesis and phase stability of silicate-substituted alpha-tricalcium phosphate

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12 Citations (Scopus)

Abstract

Silicate-substituted calcium phosphates have been shown to result in enhanced biological OF performance compared to the corresponding, silicate-free, calcium phosphates. We have produced a range of silicate-substituted alpha-TCP compositions using two different synthesis methods and two different substitution mechanisms. Single phase compositions were only observed for a silicate substitution of 1.3 wt% by both solid state synthesis and aqueous precipitation synthesis, although the latter was the result of a design composition with a higher silicate substitution (3 wt%). The silicate substitution resulted in small changes in the unit cell parameters of the alpha-TCP. More importantly, this small level of silicate substitution had a strong effect on the thermal stability of the alpha-TCP phase, with the silicate substitution stabilising the alpha-polyrnorph to lower temperatures. This has an immediate advantage in that the quenching conditions are not as critical for the production of silicate-substituted alpha-TCP compositions compared to silicate-free alpha-TCP.

Original languageEnglish
Title of host publicationBioceramics
Subtitle of host publicationProceedings of the 20th International Symposium on Ceramics in Medicine
EditorsGuy Daculsi, Pierre Layrolle
Place of PublicationZurich, Switzerland
PublisherTrans Tech Publications Ltd
Pages67-70
Number of pages4
Volume20
Edition1-2
ISBN (Print)087849457X, 978-0878494576
Publication statusPublished - 30 Mar 2008
Event20th International Symposium on Ceramics in Medicine - Nantes, France
Duration: 24 Oct 200726 Oct 2007

Publication series

NameKey Engineering Materials
PublisherTrans Tech Publications Ltd
Volume361-363
ISSN (Print)1013-9826

Conference

Conference20th International Symposium on Ceramics in Medicine
CountryFrance
CityNantes
Period24/10/0726/10/07

Keywords

  • hydroxyapatite
  • silicate
  • silicon
  • substitution
  • X-ray diffraction
  • CALCIUM PHOSPHATES

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