Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1477118 | Journal of the European Ceramic Society | 2006 | 8 Pages |
Abstract
Nano-powders of pure AB-type carbonated hydroxyapatite (HA) sized of ∼100 nm were successfully produced via hydrothermal transformation (HT) of milled oyster shell powders at 200 °C. Low production cost, worldwide availability and natural-biological origin of raw materials are important features of the investigated process. When fine shell powders were used, the transformation reaction from aragonite to hydroxyapatite was accomplished within about 24 h. Calcite, concentrated at the outer surface of the shells, was less prone to transform into hydroxyapatite under the investigated hydrothermal conditions, even after prolonged reaction time (72 h) or in highly concentrated phosphate solutions.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
A.F. Lemos, J.H.G. Rocha, S.S.F. Quaresma, S. Kannan, F.N. Oktar, S. Agathopoulos, J.M.F. Ferreira,