Dehydroxylation of hydroxyapatite in dense bulk ceramics sintered by spark plasma sintering
2012 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, Vol. 32, no 11, 2691-2696 p.Article in journal (Refereed) Published
Dense transparent hydroxyapatite (HAp) nanoceramic samples were prepared by spark plasma sintering of a commercial available granulated nanopowder. This made it possible for investigating the dehydroxylation behaviours of HAp in fully dense bulks. Post-SPS thermal annealing was performed in a temperature interval of 800 to 1100 degrees C in air. The phase analysis and microstructural characterization revealed that the dehydroxylation in fully dense HAp was initiated above 900 degrees C and its kinetics seems to be determined by the water vapour diffusion. Accordingly, a gradient structure consisting of porous interiors and a peculiar surface topography reflecting the water vapour escaping patterns were observed in samples experienced severe dehydroxylation.
Place, publisher, year, edition, pages
2012. Vol. 32, no 11, 2691-2696 p.
Bioceramics, Hydroxyapatite, Dehydroxylation, Microstructure
IdentifiersURN: urn:nbn:se:su:diva-80601DOI: 10.1016/j.jeurceramsoc.2012.02.025ISI: 000306247200016OAI: oai:DiVA.org:su-80601DiVA: diva2:557648