Standard Gibbs energy of formation of tellurium dioxide measurement by a solid-oxide electrolyte EMF technique

M. Aspiala, D. Sukhomlinov, P. Taskinen*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

The standard Gibbs energy of formation of TeO2 in the temperature range 369-795 degrees C was measured by the EMF method involving solid-oxide electrolyte galvanic cells of the type:

(-)Pt. Ir. Te(s, l), Teo(2)(s, l)vertical bar YSZ vertical bar O-2. Pt(+)

where YSZ denotes stabilized zirconia with 8.5 mass percent of yttrium oxide. The standard Gibbs energies of formation obtained from the above cells are linear functions of temperature as:

Delta(f)G degrees(kj/mol) = -317.09 + 0.180T(K) +/- 0.307 (642-722.15 k) both phases are solid.

Delta(f)G degrees(kj/mol) = -318.01 + 0.180T(K) +/- 0.308 (722.15-1005.8 k)Te-liquid; TeO2-solid.

Delta(f)G degrees(kj/mol) = -256.26 + 0.120T(K) +/- 0.226 (1005.8-1068 k) both phases are liquid. (C) 2013 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalThermochimica Acta
Volume573
DOIs
Publication statusPublished - 10 Dec 2013
MoE publication typeA1 Journal article-refereed

Keywords

  • TeO2
  • EMF method
  • Standard Gibbs energy of formation
  • Zirconia electrolyte
  • THERMODYNAMIC PROPERTIES
  • OXYGEN
  • TEO2
  • SYSTEM

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