Abstract
Hydroxyapatite (HAp), a member of the calcium phosphate family is the most commonly studied ceramic for various biomedical applications. Its physical, mechanical, and bioactive properties can be easily altered by substituting other elements or modifying the processing conditions. In the present study, the Sr2+ and Sr2+/Zr4+ substituted HAp have been synthesized by microwave processing at three different sintering temperatures. The effect of sintering temperature and doping/co-doping on HAp has been evaluated and compared by XRD, SEM, density, hardness, and bioactive properties. Lattice parameters, crystallinity, and crystallite size are observed to be dependent upon dopant and sintering temperature. Sr and Zr co-doped samples are observed to exhibit small grain size and lower hardness as compared to Sr-doped HAp. However, the cooping of Sr/Zr in HAp enhances its bioactivity in simulated body fluid solution as compared to single-doped Sr-HAp.
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