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Rapid Mix Preparation of Bioinspired Nanoscale Hydroxyapatite for Biomedical Applications
Published on: February 23, 2017
Sintering behaviour of hydroxyapatite bioceramics.
1Ceramics Technology Laboratory, COE, University Tenaga Nasional, Km-7, Jalan Kajang-Puchong, 43009 Kajang, Selangor, Malaysia.
The Medical Journal of Malaysia
|November 26, 2008
Summary
Synthesized hydroxyapatite (HA) shows superior sinterability compared to commercial HA, achieving high density at lower temperatures without phase decomposition. This advancement offers improved material processing for HA applications.
Area of Science:
- Biomaterials Science
- Materials Science
- Ceramics Engineering
Background:
- Hydroxyapatite (HA) is a critical biomaterial for bone regeneration and dental implants.
- Optimizing HA sintering is essential for achieving desired mechanical properties and in vivo performance.
- Commercial HA powders often require high sintering temperatures, limiting processing options and potentially affecting phase stability.
Purpose of the Study:
- To compare the sintering behavior of synthesized HA with commercial HA.
- To evaluate the effects of sintering on phase stability, density, Young's modulus, and Vickers hardness.
- To determine the sinterability of a novel, synthesized HA powder.
Main Methods:
- Synthesis of stoichiometric HA powder via wet chemical precipitation.
- Sintering experiments conducted on both synthesized and commercial HA powders from 700°C to 1400°C.
- Characterization of sintered samples for phase composition, bulk density, Young's modulus, and Vickers hardness.
Main Results:
- Synthesized HA powder exhibited significantly higher sinterability than commercial HA.
- Lower sintering temperatures (approx. 150°C reduction) were required for synthesized HA to reach >98% theoretical density.
- Both HA types maintained phase stability, with no decomposition observed during sintering.
Conclusions:
- Wet chemical precipitation yields a highly sinterable, submicron HA powder suitable for low-temperature processing.
- The synthesized HA demonstrates enhanced densification and mechanical properties compared to commercial HA.
- The improved sinterability of synthesized HA offers advantages for fabricating dense HA bioceramics with tailored properties.
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