ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Hydroxyapatite powders characterized by substitutions of Mg2+, SiO44-, CO32- ions inbiological like amounts, in the crystallographic site of calcium and phosphates, ions in biologicallike amounts, in the crystallographic site of calcium and phosphorus, were successfully prepared bysynthesis in aqueous medium. The chemico-physical properties of the powders were investigatedthrough several analytical techniques, among them: XRD, FTIR, TG-DTA, ICP-OES, HR-TEM. Theentering of silicon in the HA structure progressively reduces its crystallinity, as also carbonate ionsdo. Silicate and carbonate ions can enter simultaneously into the HA structure, in biological-likeamounts, although they compete for the occupation of the phosphate site. Solubility tests, carriedout at physiological conditions, reveal an increased calcium release in the HA powders containingsilicon compared to the silicon-free HA
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.361-363.171.pdf
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