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High-temperature hot corrosion behavior of gadolinium zirconate by vanadium pentoxide and sodium sulfate in air
- Source :
-
Journal of the European Ceramic Society . Sep2010, Vol. 30 Issue 12, p2707-2713. 7p. - Publication Year :
- 2010
-
Abstract
- Abstract: Gadolinium zirconate (Gd2Zr2O7) prepared by solid state reaction exhibited a defect fluorite-type structure. Reactions between Gd2Zr2O7 ceramic and vanadium pentoxide (V2O5), sodium sulfate (Na2SO4), and V2O5 +Na2SO4 mixture were investigated from 700 to 1000°C in air using an X-ray diffractometer (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). V2O5 reacts with Gd2Zr2O7 to form gadolinium vanadate (GdVO4) and monoclinic zirconia (m-ZrO2) at 900 and 1000°C in air. However, no chemical reaction product between Na2SO4 and Gd2Zr2O7 is found at 900 and 1000°C in air. V2O5 reacts with equal molar Na2SO4 to form sodium vanadate (NaVO3) at 610°C. In the temperature range of 700–1000°C, Na2SO4 +V2O5 mixture reacts with Gd2Zr2O7 in air to form the final reaction products of GdVO4 and m-ZrO2. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09552219
- Volume :
- 30
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Journal of the European Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 51844435
- Full Text :
- https://doi.org/10.1016/j.jeurceramsoc.2010.05.002