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Title: Nanosized LiMn{sub 2}O{sub 4} from mechanically activated solid-state synthesis

Abstract

The synthesis of pure and Cr-doped nanosized LiMn{sub 2}O{sub 4} particles has been carried out by solid-state process on high-energy ground mixtures. In situ X-ray analysis demonstrates the spinel forms as single phase at 623 K passing through the Mn{sub 3}O{sub 4} precursor at temperatures as low as 573 K. In the doped high-energy ground mixture Li-rich spinel phase forms at 623 K and Cr ions insert in the spinel octahedral site only at 723 K. A mean particle size value of 60 A, quite independent of the reaction time, is obtained for T<673 K. For higher temperature the growing of the particles as a function of time is observed, independent of doping. The mechanical grinding seems to be the most suitable way to obtain impurity-free spinel phases at lower temperature and with smaller particle size with respect to manually ground mixtures by solid-state reaction and via sol-gel synthesis.

Authors:
 [1];  [2];  [2]
  1. Dipartimento di Chimica Fisica 'M. Rolla' e IENI-CNR, viale Taramelli 16, 27100 Pavia (Italy). E-mail: vincenzo.massarotti@unipv.it
  2. Dipartimento di Chimica Fisica 'M. Rolla' e IENI-CNR, viale Taramelli 16, 27100 Pavia (Italy)
Publication Date:
OSTI Identifier:
20784899
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 179; Journal Issue: 2; Other Information: DOI: 10.1016/j.jssc.2005.11.019; PII: S0022-4596(05)00558-X; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CHROMIUM IONS; DOPED MATERIALS; IMPURITIES; LITHIUM CARBONATES; MANGANESE OXIDES; NANOSTRUCTURES; PARTICLE SIZE; SCANNING ELECTRON MICROSCOPY; SOL-GEL PROCESS; SPINELS; STOICHIOMETRY; SYNTHESIS; TEMPERATURE RANGE 0400-1000 K; X-RAY DIFFRACTION

Citation Formats

Massarotti, V., Capsoni, D., and Bini, M.. Nanosized LiMn{sub 2}O{sub 4} from mechanically activated solid-state synthesis. United States: N. p., 2006. Web. doi:10.1016/j.jssc.2005.11.019.
Massarotti, V., Capsoni, D., & Bini, M.. Nanosized LiMn{sub 2}O{sub 4} from mechanically activated solid-state synthesis. United States. doi:10.1016/j.jssc.2005.11.019.
Massarotti, V., Capsoni, D., and Bini, M.. Wed . "Nanosized LiMn{sub 2}O{sub 4} from mechanically activated solid-state synthesis". United States. doi:10.1016/j.jssc.2005.11.019.
@article{osti_20784899,
title = {Nanosized LiMn{sub 2}O{sub 4} from mechanically activated solid-state synthesis},
author = {Massarotti, V. and Capsoni, D. and Bini, M.},
abstractNote = {The synthesis of pure and Cr-doped nanosized LiMn{sub 2}O{sub 4} particles has been carried out by solid-state process on high-energy ground mixtures. In situ X-ray analysis demonstrates the spinel forms as single phase at 623 K passing through the Mn{sub 3}O{sub 4} precursor at temperatures as low as 573 K. In the doped high-energy ground mixture Li-rich spinel phase forms at 623 K and Cr ions insert in the spinel octahedral site only at 723 K. A mean particle size value of 60 A, quite independent of the reaction time, is obtained for T<673 K. For higher temperature the growing of the particles as a function of time is observed, independent of doping. The mechanical grinding seems to be the most suitable way to obtain impurity-free spinel phases at lower temperature and with smaller particle size with respect to manually ground mixtures by solid-state reaction and via sol-gel synthesis.},
doi = {10.1016/j.jssc.2005.11.019},
journal = {Journal of Solid State Chemistry},
number = 2,
volume = 179,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2006},
month = {Wed Feb 15 00:00:00 EST 2006}
}