Influence of lanthanum carbonate additions on thermal stability of eutectic lithium-sodium carbonate near its melting point

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Abstract

Thermal behavior and stability of eutectic 52/48 Li/Na carbonate mixture containing various concentrations of lanthanum carbonate in the range 0.5-2.0 mol% was investigated by a combination of thermal analysis (DSC) and spectroscopic (EGA-FTIR) techniques under CO2and N2gas flows. Thermal decomposition of lanthanum carbonate with CO2gas release was observed in the 470-480 °C range close to the melting point of eutectic alkali carbonate giving raise to formation of lanthanum oxycarbonate species. It was also found that the lanthanum carbonate phase promptly reformed, when the eutectic carbonate melt samples were cooled down to 440-460 °C under CO2atmosphere. © 2012 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)33 - 39
Number of pages7
JournalThermochimica Acta
Volume551
DOIs
Publication statusPublished - 10 Jan 2013

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All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Instrumentation

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