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Title: Synthesis and characterization of sodium titanates Na{sub 2}Ti{sub 3}O{sub 7} and Na{sub 2}Ti{sub 6}O{sub 13}

Abstract

Na{sub 2}Ti{sub 3}O{sub 7} and Na{sub 2}Ti{sub 6}O{sub 13} were synthesized by sol-gel method in order to obtain pure phases. Different heat-treatments were applied on powders and pellets of these materials. The effects were studied by XRD, dilatometry, TGA-DTA, SEM and electrochemical impedance spectroscopy. Pure Na{sub 2}Ti{sub 3}O{sub 7} was obtained at 973K. Sintering at 1373K caused a partial decomposition into Na{sub 2}Ti{sub 6}O{sub 13}. The Na{sub 2}Ti{sub 3}O{sub 7} powder sintered at 1273K showed polygonal microstructure. Na{sub 2}Ti{sub 3}O{sub 7} pellets sintered at 1323K for 10h exhibited large structures. This latter microstructure decreased the electrical conductivity of Na{sub 2}Ti{sub 3}O{sub 7}. Pure Na{sub 2}Ti{sub 6}O{sub 13} was obtained at 873K. Sintering at 1073K caused a partial decomposition into TiO{sub 2} (rutile). Na{sub 2}Ti{sub 6}O{sub 13} pellets sintered at 1323K for 10h exhibited common shrinkage behavior. This shrinkage process increased the electrical conductivity of this material. The presence of TiO{sub 2} resulted in a oxygen partial pressure dependence of the electrical conductivity.

Authors:
 [1];  [1];  [1];  [1]
  1. Laboratoire d'Electrochimie et de Physico-Chimie des Materiaux et des Interfaces, UMR 5631 CNRS-INPG-UJF, ENSEEG, 1130 rue de la Piscine, BP 75, 38402 Saint Martin d'Heres (France)
Publication Date:
OSTI Identifier:
20658226
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 177; Journal Issue: 12; Other Information: DOI: 10.1016/j.jssc.2004.09.008; PII: S0022-4596(04)00504-3; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DECOMPOSITION; DIFFERENTIAL THERMAL ANALYSIS; DILATOMETRY; ELECTRIC CONDUCTIVITY; HEAT TREATMENTS; MICROSTRUCTURE; OXYGEN; PARTIAL PRESSURE; PELLETS; RUTILE; SCANNING ELECTRON MICROSCOPY; SINTERING; SODIUM COMPOUNDS; SOL-GEL PROCESS; SPECTROSCOPY; TEMPERATURE RANGE 1000-4000 K; THERMAL GRAVIMETRIC ANALYSIS; TITANATES; TITANIUM OXIDES; X-RAY DIFFRACTION

Citation Formats

Sauvet, A-L, Baliteau, S, Lopez, C, and Fabry, P. Synthesis and characterization of sodium titanates Na{sub 2}Ti{sub 3}O{sub 7} and Na{sub 2}Ti{sub 6}O{sub 13}. United States: N. p., 2004. Web. doi:10.1016/j.jssc.2004.09.008.
Sauvet, A-L, Baliteau, S, Lopez, C, & Fabry, P. Synthesis and characterization of sodium titanates Na{sub 2}Ti{sub 3}O{sub 7} and Na{sub 2}Ti{sub 6}O{sub 13}. United States. doi:10.1016/j.jssc.2004.09.008.
Sauvet, A-L, Baliteau, S, Lopez, C, and Fabry, P. Wed . "Synthesis and characterization of sodium titanates Na{sub 2}Ti{sub 3}O{sub 7} and Na{sub 2}Ti{sub 6}O{sub 13}". United States. doi:10.1016/j.jssc.2004.09.008.
@article{osti_20658226,
title = {Synthesis and characterization of sodium titanates Na{sub 2}Ti{sub 3}O{sub 7} and Na{sub 2}Ti{sub 6}O{sub 13}},
author = {Sauvet, A-L and Baliteau, S and Lopez, C and Fabry, P},
abstractNote = {Na{sub 2}Ti{sub 3}O{sub 7} and Na{sub 2}Ti{sub 6}O{sub 13} were synthesized by sol-gel method in order to obtain pure phases. Different heat-treatments were applied on powders and pellets of these materials. The effects were studied by XRD, dilatometry, TGA-DTA, SEM and electrochemical impedance spectroscopy. Pure Na{sub 2}Ti{sub 3}O{sub 7} was obtained at 973K. Sintering at 1373K caused a partial decomposition into Na{sub 2}Ti{sub 6}O{sub 13}. The Na{sub 2}Ti{sub 3}O{sub 7} powder sintered at 1273K showed polygonal microstructure. Na{sub 2}Ti{sub 3}O{sub 7} pellets sintered at 1323K for 10h exhibited large structures. This latter microstructure decreased the electrical conductivity of Na{sub 2}Ti{sub 3}O{sub 7}. Pure Na{sub 2}Ti{sub 6}O{sub 13} was obtained at 873K. Sintering at 1073K caused a partial decomposition into TiO{sub 2} (rutile). Na{sub 2}Ti{sub 6}O{sub 13} pellets sintered at 1323K for 10h exhibited common shrinkage behavior. This shrinkage process increased the electrical conductivity of this material. The presence of TiO{sub 2} resulted in a oxygen partial pressure dependence of the electrical conductivity.},
doi = {10.1016/j.jssc.2004.09.008},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 12,
volume = 177,
place = {United States},
year = {2004},
month = {12}
}