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Dehydroxylation of hydroxyapatite in dense bulk ceramics sintered by spark plasma sintering
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
2012 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 32, no 11, 2691-2696 p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
Bioceramics, Hydroxyapatite, Dehydroxylation, Microstructure
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:su:diva-80601DOI: 10.1016/j.jeurceramsoc.2012.02.025ISI: 000306247200016OAI: oai:DiVA.org:su-80601DiVA: diva2:557648
Note

AuthorCount:2;

Available from: 2012-09-28 Created: 2012-09-25 Last updated: 2017-12-07Bibliographically approved

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