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:
A systematic study of the stability of potassium/carbonate co-substituted hydroxyapatitehas been carried out, with samples synthesized by aqueous precipitation according to the chargebalancedmechanism:Ca10-xKx(PO4)6-x(CO3)x(OH)2Samples up to x=1.0 were prepared and their stability determined by heating at a range oftemperatures in both air and CO2 environments. Results showed that whilst samples up to x=1.0can be prepared phase-pure, the stability of these materials is strongly dependent on sinteringtemperature with the full range of compositions only being stable at 600°C in CO2. The c unit cellparameter increases linearly with x, and, for a fixed composition, decreases linearly withtemperature indicating loss of carbonate from the A-site. FTIR showed that samples containedcarbonate at both A- and B-sites, and that carbonate content increased with x
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.361-363.207.pdf
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