Abstract
The effect of the concentration of interstitial oxygen ions in β″-alumina containing TiO 2 and Fe 2O 3 as transition metal impurities on the valence change of Ti 4+ and Fe 3+ was investigated by ESR. The valence change of Ti 4+ and Fe 3+ was not observed in β″-alumina with no interstitial oxygen ions. With increase of the concentration of interstitial oxygen ions in β″-alumina, the concentration of Ti 3+ and Fe 2+ increased, and sodium precipitation was delayed. The following mechanisms were considered: (1) When interstitial oxygen ions are taken away by liquid sodium, Ti 4+ and Fe 3+ are reduced; (2) when bridging oxygen ions are taken away by liquid sodium, sodium precipitates in β″-alumina; (3) when β″-alumina has interstitial oxygen, sodium precipitates after the reduction reaction of Ti 4+ and Fe 3+ has gone to equilibrium.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
