Sintering behaviour and microstructures of nanostructured ZnO–ZnS core–shell powder by spark plasma sintering |
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Authors: | Woo Hyun Nam Won-Seon Seo |
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Institution: | 1. Department of Materials Science and Engineering, KAIST, Daejeon, 305-701, Korea.;2. Green Ceramics Division, Korea Institute of Ceramic Engineering and Technology, Seoul, 153-801, Korea. |
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Abstract: | Densification of nanostructured ZnO–ZnS core–shell powder was carried out by spark plasma sintering to produce a bulk ZnO–ZnS composite. By adjusting the sintering temperature, we could fabricate a bulk ZnO–ZnS composite without destroying the original core–shell structure of the powder. X-ray diffraction and transmission electron microscopy were used to characterize the microstructural properties of the core–shell powder and its sintering behaviour. During spark plasma sintering, phase transition from a sphalerite to a wurtzite structure was observed in the ZnS shell and the crystallographic orientation of the ZnS shell was affected by the ZnO core. |
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Keywords: | ZnO ZnS core-shell spark plasma sintering transmission electron microscopy |
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