The effects of sintering behavior of zirconia-doped hydroxyapatite for clinical applications

Cheah, G.P. and Tan, C.Y. and Yusof, F. and Muchtar, A. and Lim, K.F. and Yap, B.K. (2014) The effects of sintering behavior of zirconia-doped hydroxyapatite for clinical applications. Materials Research Innovations, 18 (S6). pp. 151-154.

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Hydroxyapatite is one of the most potential bioceramic to be applied into the medical and dental field due to its biocompatibility with human hard tissue. However, its properties are still behind those of hard tissues and further studies need to be done to improve its mechanical properties. In the current work, hydroxyapatite powder was prepared via the wet chemical method. Subsequently, the powder was doped with zirconia with weight percentages of 0.05, 0.1, 0.5, 1 and 5%. The bulks were then sintered at temperatures of 1100, 1200 and 1300 degrees C at atmospheric pressure. The results revealed that the highest relative density of 99.9% was obtained for samples doped with 0.1% zirconia when sintered at 1200 degrees C. Nevertheless, samples doped with 5 wt-% of zirconia showed relative lower relative densities regardless of sintering temperature. This was attributed by the presence of secondary phase which has cause decomposition during sintering.

Item Type: Article
Uncontrolled Keywords: Hydroxyapatite; Zirconia; Composite; Sintering temperature; Density; Percent shrinkage
Subjects: Q Science > Q Science (General)
Depositing User: MR Faizal II H
Date Deposited: 30 Dec 2015 08:48
Last Modified: 30 Dec 2015 08:48

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