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 language | English |
|---|---|
| Pages (from-to) | 95-100 |
| Number of pages | 6 |
| Journal | Thermochimica Acta |
| Volume | 573 |
| DOIs | |
| Publication status | Published - 10 Dec 2013 |
| MoE publication type | A1 Journal article-refereed |
Funding
The authors are indebted for the financial support by: Boliden Harjavalta Oy, Outotec Oy, Finnish Metals Producers Fund and TEKES in the framework of Trace project. Additionally, the authors thank for an anonymous reviewer for additional references to previous studies.
Keywords
- TeO2
- EMF method
- Standard Gibbs energy of formation
- Zirconia electrolyte
- THERMODYNAMIC PROPERTIES
- OXYGEN
- TEO2
- SYSTEM
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