Abstract
The properties of hydroxyaptite (HA) powder, especially its physical one, are largely influenced by the heat treatment process. Controlling of these changes is vital in deciding the suitability of applying this powder in wet processing routes for green body fabrication. Chemically, the crystallinity of the HA powder was found to be largely enhanced with the increase in calcination temperatures. In contrary, a high retardation in the carbonate ion content was found. Physically, all the powder properties in terms of particle size, its distribution, pore volume, pore size and surface area are considerably varied with calcination temperatures. It was found that HA powder calcined at both 1000 and 1100∘C possesses reasonable physico-chemical properties for being applied in wet processing routes. Using heat-treated powder at 1000 and 1100∘C with 0.3 wt% sodium polyacrylate (as a dispersing agent) turned out to be beneficial in developing a low viscosity and high turbidity suspensions.
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AHMED, Y.M.Z., EL-SHEIKH, S.M. & ZAKI, Z.I. Changes in hydroxyapatite powder properties via heat treatment. Bull Mater Sci 38, 1807–1819 (2015). https://doi.org/10.1007/s12034-015-1047-0
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DOI: https://doi.org/10.1007/s12034-015-1047-0