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Erschienen in:
22.08.2017 | Brief Communication: Sol-gel and hybrid materials for biological and health (medical) applications
Effects of sintering temperature on the properties of alumina/hydroxyapatite composites
Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 1/2017
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Abstract
We have investigated the effects of sintering temperature on the properties of hot-pressed alumina/hydroxyapatite ceramic composites. The ceramic composites were characterized by field-emission scanning electron microscopy and X-ray diffraction. The mechanical properties of the composites were also assessed. The results showed that the sintering temperature is a critical factor influencing phase composition, sintered microstructure and hence the mechanical properties. The decomposition of Hydroxyapatite to calcium phosphate was accelerated and the compactness and grain size increased with the increasing sintering temperature. Samples sintered at 1250 °C exhibited better mechanical properties as compared to those sintered at other temperatures.
Graphical abstract
Secondary electron micrographs images of fracture surfaces of the composite ceramics sintered at different temperatures: (a) 1100 °C, (b) 1150 °C, (c) 1200 °C, (d) 1250 °C, (e) 1300 °C and (f) the SEM images of the residue extracted by dissolving the composite ceramic sintered at 1300 °C.
