Abstract
Combustion synthesis is energy efficient, cost effective and a single step process for producing high purity nanoceramics, compared to conventional multi-stage wet chemical processes. Strontium substituted Hydroxyapatite (Sr-HAp) is a bioceramic having beneficial effects on osteoporotic drug delivery, bone formation and regeneration. Limited research work has been reported on combustion synthesis of Sr-HAp with no detailed investigation on the influence of process parameters on powder quality. In the present study, a Design of Experiments based twenty seven trials for Sr-HAp synthesis and detailed characterization of as-synthesized powders using X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) with Energy Dispersive Spectroscopy (EDS) were carried out to optimize the process parameters to obtain the desired powder characteristics. A hypothesis on the formation of one dimensional nanorods based on nucleation growth kinetics has been proposed. As-synthesized powders were found to exhibit better structural and chemical homogeneity with optimum crystallinity fulfilling the criteria for use in biomedical applications.
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