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- W2367718063 abstract "Nanocrystalline powders of sodium tungsten bronze Na_xWO_3 (x～0.88) have been prepared by mechanochemical process. The solid-state reaction Na+WO_3→Na_xWO_3+ Na_2WO_4 proceeds with increasing milling time and was almost finished after 44h. A single phase of Na_xWO_3 nanoparticles with average size of 17nm was directly obtained by a simple washing process. The sample displays semiconducting behavior in the temperature range from 77～300K, and the experimental data of resistivity can be well described by Mott′s three-dimensional (3D) variable-range hopping model. The ~(182)W Mssbauer spectrum recorded at 77K exhibits a singlet with an isomer shift of 0.0128mm/s, indicating the cubic symmetry of Na_xWO_3 phase." @default.
- W2367718063 created "2016-06-24" @default.
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- W2367718063 date "2004-01-01" @default.
- W2367718063 modified "2023-09-25" @default.
- W2367718063 title "Na_xWO_3 (x～0.88) nanocrystalline powders fabricated by mechanochemical synthesis" @default.
- W2367718063 hasPublicationYear "2004" @default.
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