caa a22 4500 463222423 CHVBK 20180405153216.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10853-006-0783-3 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0783-3 Phase transformations of calcium phosphates formed in wet field environments [Elektronische Daten] [O. Clarkin, M. Towler, G. Insley, M. Murphy] The crystal phase and morphology of calcium phosphate salts precipitated in a wet field environment at temperatures between 30 and 70°C and pHs between 3 and 8 were examined. Dicalcium Phosphate Dihydrate (DCPD) was the most prevalent phase precipitated. Using accelerated ageing study techniques, precipitates studied were aged, under dry conditions at 50°C for 8 and 16days, before being re-examined using XRD, FTIR and SEM techniques. DCPD was found to be most stable when precipitated at 40°C and 5 pH. Considerably more phase transformation to Octacalcium Phosphate (OCP), Amorphous Calcium Phosphate (ACP) and Hydroxyapatite (HA) was seen at high temperatures and high pHs, and a greater tendency to form anhydrous salts was seen at high temperatures and low pHs. Using techniques such as XRD, FTIR and SEM the transformation of the DCPD precipitate to OCP was analysed and appeared to occur without the presence of an intermediate amorphous phase. However, transformation from OCP to HA did result in the formation of an intermediate amorphous phase. Springer Science+Business Media, LLC, 2007 Clarkin O. Materials & Surface Science Institute, University of Limerick, Limerick, Ireland aut Towler M. Materials & Surface Science Institute, University of Limerick, Limerick, Ireland aut Insley G. Biomaterials Research Group, Stryker, Limerick, Ireland aut Murphy M. Biomaterials Research Group, Stryker, Limerick, Ireland aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/19(2007-10-01), 8357-8362 0022-2461 42:19<8357 2007 42 10853 https://doi.org/10.1007/s10853-006-0783-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0783-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Clarkin O. Materials & Surface Science Institute, University of Limerick, Limerick, Ireland aut NATIONALLICENCE 700 1- Towler M. Materials & Surface Science Institute, University of Limerick, Limerick, Ireland aut NATIONALLICENCE 700 1- Insley G. Biomaterials Research Group, Stryker, Limerick, Ireland aut NATIONALLICENCE 700 1- Murphy M. Biomaterials Research Group, Stryker, Limerick, Ireland aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/19(2007-10-01), 8357-8362 0022-2461 42:19<8357 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer