Premium
Stability of Metal Oxide Doped ZnO in Molten Alkali Carbonates
Author(s) -
BAUMGARTNER CHARLES E.
Publication year - 1985
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1985.tb10174.x
Subject(s) - solubility , dissolution , alkali metal , decomposition , doping , inorganic chemistry , chromium , oxide , materials science , chromate conversion coating , carbonate , metal , zirconium , chemistry , mineralogy , chemical engineering , metallurgy , organic chemistry , optoelectronics , engineering
The decomposition of Cr‐doped ZnO and Zr‐doped ZnO in Li 2 CO 3 /K 2 CO 3 melts at 923 K under a humidified 30% CO 2 /air atmosphere was found to occur by different routes, with the relevant equilibrium solubilities in the carbonate melt mitigating the decomposition path. Chromium–doped ZnO undergoes Cr depletion resulting from dissolution of the doped material followed by reprecipitation of a Cr‐depleted ZnO; the Cr remains dissolved as highly soluble chromate. This reaction progresses until Cr equilibrium solubility is met. Zirconium‐doped ZnO shows preferential ZnO solubility, with reprecipitation of ZrO 2 and Li 2 ZrO 3 .