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- W3020390622 abstract "New transparent defect pyrochlore KNbTeO6 ceramics were successfully prepared by Spark Plasma Sintering (SPS) of same composition polycrystalline powders elaborated by classic solid-state reaction from oxide precursors (K2CO3, Nb2O5, TeO2) and followed by high energy milling powders. As such precursors are not available as commercial nanopowders, a suitable process has been developed by combining solid-state reactions and high energy milling. The determination of appropriate consolidation conditions and sintering parameters of the green body such prepared, are described in this paper. The resulting ceramic is transparent in both the visible and near infrared range (up to 5.5 μm). The maximum of transmittance is reached in the near infrared region around 2500 nm with a value of 78 % (1 mm thick sample), close to the maximum theoretical value of transmittance. This transparent KNbTeO6 ceramic demonstrates a homogeneous and dense microstructure with an average grain size less than 500 nm. A small content of secondary phase has been detected by nanoscale observations without drastic effects on transparency. This ceramic exhibits very good mechanical properties similar to the Y2O3 transparent ceramic, as well as interesting dielectric properties in the microwave range. This innovative method should drive the development of new transparent materials with technologically relevant applications." @default.
- W3020390622 created "2020-05-01" @default.
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- W3020390622 date "2020-09-01" @default.
- W3020390622 modified "2023-10-15" @default.
- W3020390622 title "New KNbTeO6 transparent tellurate ceramics" @default.
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- W3020390622 doi "https://doi.org/10.1016/j.jeurceramsoc.2020.04.005" @default.
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