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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Cottrino, Sandrine
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Topics
Publications (9/9 displayed)
- 2024Insights on the effect of process conditions on the optical properties of silver ion exchanged soda-lime silicate glass
- 2023In situ X-ray diffraction study of a TiO2 nanopowder Spark Plasma Sintering under very high pressurecitations
- 2023In situ X-ray diffraction study of a TiO2 nanopowder Spark Plasma Sintering under very high pressurecitations
- 2020Optimum in the thermoelectric efficiency of nanostructured Nb-doped TiO 2 ceramics: from polarons to Nb–Nb dimerscitations
- 2020Optimum in the thermoelectric efficiency of nanostructured Nb-doped TiO 2 ceramics: from polarons to Nb–Nb dimerscitations
- 2020Effect of High Pressure Spark Plasma Sintering on the Densification of a Nb-Doped TiO2 Nanopowdercitations
- 2020Effect of High Pressure Spark Plasma Sintering on the Densification of a Nb-Doped TiO2 Nanopowdercitations
- 2019Sol-gel preparation of doped-metal oxide nanostructures for the thermoelectric conversion of energy
- 2013Characterization by X-ray tomography of granulated alumina powder during in situ die compaction
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article
Effect of High Pressure Spark Plasma Sintering on the Densification of a Nb-Doped TiO2 Nanopowder
Abstract
Sintering under pressure by means of the spark plasma sintering (SPS) technique is a common route to reduce the sintering temperature and to achieve ceramics with a fine-grained microstructure. In this work, high-density bulk TiO 2 was sintered by high pressure SPS. It is shown that by applying high pressure during the SPS process (76 to 400 MPa), densification and phase transition start at lower temperature and are accelerated. Thus, it is possible to dissociate the two densification steps (anatase then rutile) and the transition phase during the sintering cycle. Regardless of the applied pressure, grain growth occurs during the final stage of the sintering process. However, twinning of the grains induced by the phase transition is enhanced under high pressure resulting in a reduction in the crystallite size.