Abstract
Hydroxyapatite (HA) has been synthesised in presence of 10–30 wt.% of m-ZrO 2 by solid state reaction between tricalcium phosphate (TCP) and Ca(OH) 2 at 1000 °C for 8 h. The m-ZrO 2 was partly converted into t-ZrO 2 by partial consumption of CaO which in turn resulted in a mixture of β-TCP and HA. On sintering these HA–β-TCP–ZrO 2 composite powders at 1100–1400 °C for 2 h, the HA is further decomposed into β-TCP and CaO. The CaO so produced reacts further with m-ZrO 2/ t-ZrO 2 generating a mixture of t-ZrO 2 and CaZrO 3 in different proportions. These various phases formed interfere with the sinterability of the composites due to their differential shrinkages leading to a overall reduced density as compared to that of pure HA. The composites show a T-onset of decomposition at around 1150 °C and a 40% HA yield was obtained at the highest sintering temperature of 1400 °C. The products were subjected to XRD for phase analysis and the microstructural features were studied by SEM.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
