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Title: Current-voltage characteristics and grain growth of Li{sub 2}CO{sub 3}-doped tungsten trioxide ceramics

Abstract

Ceramics samples of tungsten trioxide doped with lithium carbonate from 0.5 to 5 mol% were prepared by conventional electroceramic technique. The current-voltage characteristics of these ceramics were measured under various ambient temperatures. All of the I-V curves showed non-ohmic electrical properties with obvious negative-resistance characteristic at room temperature. It is found that there exists a direct correlation between the negative-resistance phenomenon in the I-V curves and the electrical history of these samples. The suitability of some models regarding the negative-resistance characteristics is discussed. X-ray diffraction (XRD) revealed coexistence of two phases of tungsten trioxide, which depends on the amount of lithium. Scanning electron microscope (SEM) showed great differences for both grain shape and size between the Li-doped and undoped WO{sub 3} ceramics, and this indicates that Li{sub 2}CO{sub 3} doped into WO{sub 3} influences strongly the growing of WO{sub 3} during sintering process.

Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
20879925
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 39; Journal Issue: 10; Other Information: DOI: 10.1016/j.materresbull.2004.04.029; PII: S002554080400128X; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AMBIENT TEMPERATURE; CERAMICS; CRYSTAL GROWTH; DOPED MATERIALS; ELECTRIC POTENTIAL; ELECTRICAL PROPERTIES; GRAIN GROWTH; LITHIUM; LITHIUM CARBONATES; MICROSTRUCTURE; SCANNING ELECTRON MICROSCOPY; SINTERING; TUNGSTATES; TUNGSTEN OXIDES; X-RAY DIFFRACTION

Citation Formats

Wang, Y, Yang, X S, Li, Z Q, Yao, K L, and Liu, Z L. Current-voltage characteristics and grain growth of Li{sub 2}CO{sub 3}-doped tungsten trioxide ceramics. United States: N. p., 2004. Web. doi:10.1016/j.materresbull.2004.04.029.
Wang, Y, Yang, X S, Li, Z Q, Yao, K L, & Liu, Z L. Current-voltage characteristics and grain growth of Li{sub 2}CO{sub 3}-doped tungsten trioxide ceramics. United States. https://doi.org/10.1016/j.materresbull.2004.04.029
Wang, Y, Yang, X S, Li, Z Q, Yao, K L, and Liu, Z L. 2004. "Current-voltage characteristics and grain growth of Li{sub 2}CO{sub 3}-doped tungsten trioxide ceramics". United States. https://doi.org/10.1016/j.materresbull.2004.04.029.
@article{osti_20879925,
title = {Current-voltage characteristics and grain growth of Li{sub 2}CO{sub 3}-doped tungsten trioxide ceramics},
author = {Wang, Y and Yang, X S and Li, Z Q and Yao, K L and Liu, Z L},
abstractNote = {Ceramics samples of tungsten trioxide doped with lithium carbonate from 0.5 to 5 mol% were prepared by conventional electroceramic technique. The current-voltage characteristics of these ceramics were measured under various ambient temperatures. All of the I-V curves showed non-ohmic electrical properties with obvious negative-resistance characteristic at room temperature. It is found that there exists a direct correlation between the negative-resistance phenomenon in the I-V curves and the electrical history of these samples. The suitability of some models regarding the negative-resistance characteristics is discussed. X-ray diffraction (XRD) revealed coexistence of two phases of tungsten trioxide, which depends on the amount of lithium. Scanning electron microscope (SEM) showed great differences for both grain shape and size between the Li-doped and undoped WO{sub 3} ceramics, and this indicates that Li{sub 2}CO{sub 3} doped into WO{sub 3} influences strongly the growing of WO{sub 3} during sintering process.},
doi = {10.1016/j.materresbull.2004.04.029},
url = {https://www.osti.gov/biblio/20879925}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 10,
volume = 39,
place = {United States},
year = {Tue Aug 03 00:00:00 EDT 2004},
month = {Tue Aug 03 00:00:00 EDT 2004}
}