Please use this identifier to cite or link to this item: https://doi.org/10.1109/DSR.2011.6026836
Title: Physiochemical stability of chemically-modified nanoapatites sintered at different temperatures
Authors: Lim, P.N.
Tong, J.Y.E.
Thian, E.S. 
Tay, B.Y.
Chan, C.M.
Keywords: Co-substitution
Hydroxyapatite
Silicon
Silver
Sintering
Issue Date: 2011
Source: Lim, P.N.,Tong, J.Y.E.,Thian, E.S.,Tay, B.Y.,Chan, C.M. (2011). Physiochemical stability of chemically-modified nanoapatites sintered at different temperatures. 2011 Defense Science Research Conference and Expo, DSR 2011 : -. ScholarBank@NUS Repository. https://doi.org/10.1109/DSR.2011.6026836
Abstract: Nanostructured apatite has been widely used as a bone substitute material due to its biological similarity to the natural bone mineral. To enhance further the biomineralisation and introduce bactericidal property into HA, co-substitution of Ag and Si has been investigated. A co-substituted nanosized apatite (Ag/Si-HA) containing Ag (0.3 wt %) and Si (0.8 wt %) was synthesized by an aqueous precipitation technique. Bone-apatite mimicking morphology of dimensions ∼50 nm in length and ∼10 nm in width was observed for the Ag/Si-HA nano powder. XRF detected the presence of Ag and Si in phase-pure Ag/Si-HA. The Ag/Si-HA nano powders were then compacted and sintered at various temperatures (900-1300 °C) and found to achieve a maximum densification of 93 % at 1300 °C, with a grain size of approximately 1 m. Phase-purity was maintained up to a temperature of 1300 °C, as observed from the XRD pattern. This study thus demonstrated that a phase-pure Ag/Si-HA was synthesized via an aqueous precipitation technique. © 2011 IEEE.
Source Title: 2011 Defense Science Research Conference and Expo, DSR 2011
URI: http://scholarbank.nus.edu.sg/handle/10635/86054
ISBN: 9781424492763
DOI: 10.1109/DSR.2011.6026836
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