The effects of zinc oxide on the sinterability of hydroxyapatite

Teh Yee Ching, Ramesh Singh, Tan Chou Yong, Yap Boon Kar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the present work, the hydroxyapatite (HA) powders were synthesized via wet chemical method. The phase formation as well as the morphology of the synthesized HA powders were studied. Then the sinterability of hydroxyapatite (HA) powders doped with zinc oxide (ZnO) ranging from 0.1 to 1.0 wt% was investigated. The ZnO-doped HA powders were obtained by incorporating ZnO into the synthesized HA powders via ball milling for 1 hour. The green samples were prepared and sintered in air at temperatures ranging from 1100°C to 1250°C. The sintered samples were characterized to determine the phase stability, bulk density, microstructure and grain size, hardness and fracture toughness. XRD analysis revealed that there were no secondary phases detected for all the ZnO-doped and undoped HA samples throughout the sintering regime employed. It was found that all the ZnO-doped HA achieved > 98% relative density when sintered at 1200°C while undoped HA could only attained highest value of 97% at the same temperature. Higher content of ZnO addition appeared to be advantageous to the densification of HA. Besides, the addition of 0.5 wt% ZnO into HA was found to be the most effective in enhancing the mechanical properties of HA. This sample possessed the highest hardness and fracture toughness of 4.76 GPa and 1.34MPam1/2 as compared to 4 GPa and 1.01MPam1/2 for undoped samples at sintering temperature of 1200°C.

Original languageEnglish
Title of host publication2016 International Conference on Applied System Innovation, IEEE ICASI 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467398886
DOIs
Publication statusPublished - 10 Aug 2016
Event2016 International Conference on Applied System Innovation, IEEE ICASI 2016 - Ginowan City Okinawa, Japan
Duration: 28 May 201601 Jun 2016

Publication series

Name2016 International Conference on Applied System Innovation, IEEE ICASI 2016

Other

Other2016 International Conference on Applied System Innovation, IEEE ICASI 2016
CountryJapan
CityGinowan City Okinawa
Period28/05/1601/06/16

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All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Computer Science Applications
  • Control and Systems Engineering
  • Social Sciences (miscellaneous)
  • Business, Management and Accounting (miscellaneous)
  • Electrical and Electronic Engineering
  • Control and Optimization

Cite this

Ching, T. Y., Singh, R., Yong, T. C., & Kar, Y. B. (2016). The effects of zinc oxide on the sinterability of hydroxyapatite. In 2016 International Conference on Applied System Innovation, IEEE ICASI 2016 [7539766] (2016 International Conference on Applied System Innovation, IEEE ICASI 2016). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICASI.2016.7539766