Monodispersed rod like hydroxyapatite (HAp) crystals, 1-7 urn length and 0-1-2 [tin dia. were prepared under hydrothermal conditions around 140-200°C using calcium polyphosphate gels as precursors. The size and morphology of the crystals changed significantly, depending on the concentrations of calcium ions, calcium polyphosphate gel, and the presence of additives. The addition of alcohols such as 2-propanol was found to be useful in promoting the formation of monodispersed hydroxyapatite crystals with large aspect ratio. With increasing Ca2+ ion concentration in the solution, the Ca/P atomic ratio of hydroxyapatite crvstals increased, but the aspect ratio greatly decreased.
|Number of pages||7|
|Journal||British Ceramic Transactions|
|Publication status||Published - 1998 Dec 1|
ASJC Scopus subject areas
- Ceramics and Composites