Thermal decomposition of yttrium(III) valerate in argon

Jean-Claude Grivel, Zhao Yue, Xiao Tang, Pallewatta G A P Pallewatta, A. Watenphul, M. v. Zimmermann

Research output: Contribution to journalJournal articlepeer-review

Abstract

The thermal decomposition of yttrium(III) valerate (Y(C4H9CO2)3) was studied in argon by means of thermogravimetry, differential thermal analysis, IR-spectroscopy, X-ray diffraction, in-situ synchrotron diffraction and hot-stage microscopy as well as room temperature optical microscopy. Melting takes place around 90 °C and evidence was found for solidification of the melt at 260–300 °C, i.e. close to the onset of decomposition. Between 300 °C and 450 °C, Y(C4H9CO2)3 decomposes in a single step into Y2O2CO3 with release of gaseous CO2 and C4H9COC4H9 (5-nonanone). Final conversion to Y2O3 takes pace with release of CO2. The carbonaceous residue, which is left as a by-product during this last decomposition step is finally slowly burned by the residual oxygen present in the Ar atmosphere between 700 °C and 900 °C.
Original languageEnglish
JournalJournal of Analytical and Applied Pyrolysis
Volume106
Pages (from-to)125-131
ISSN0165-2370
DOIs
Publication statusPublished - 2014

Keywords

  • Yttrium valerate
  • Thermal decomposition
  • TG/DTA
  • FTIR
  • X-ray powder diffraction

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