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Fomina, L.N.; Neuimin, A.D.; Pal'guev, S.F.; Vakarin, S. V.; Плаксин, С. В.

doi:10.1023/a:1011674504213

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“…In [8], when performing a synthesis with use made of a coprecipitation method of Gd 2 Zr 2 O 7 whose hightemperature modification (at T > 1530° C) is an oxygen conductor, a low-temperature modification with a fluorite structure was obtained at 550-800°ë . In [6,7] was shown that for Lu 2 Ti 2 O 7 also exists a low-temperature modification with a fluorite structure at 600 − 800°ë .…”

Section: Introductionmentioning

confidence: 99%

Ionic conduction of a high-temperature modification of Lu2Ti2O7

2005

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A nanoceramic product of the composition Lu 2 Ti 2 O 7 is synthesized by a coprecipitation method with a subsequent sublimation drying and an annealing at 650-1650°ë . The conduction of Lu 2 Ti 2 O 7 synthesized at 1650°ë is ionic ( ~10 -3 S cm -1 at 800 ° C). Thus, a new material with a high ionic conduction has been discovered. The ordering in Lu 2 Ti 2 O 7 is studied by methods of RFA, RSA, IK spectroscopy, electron microscopy, and impedance spectroscopy. The existence of a low-temperature phase transition fluorite-pyrochlore at ~800°ë and a high-temperature conversion order-disorder at 1650°ë are established.

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Section: Introductionmentioning

confidence: 99%