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Author(s): |
Qiang Zhen, School of Materials Science and Engineering,Shanghai University, Shanghai 200444, China;
Rong Li, UCCS: Unité de Catalyse et de Chimie du Solide - UMR CNRS 8181,Villeneuve d’Ascq Cedex 59652, France;
Qiang Yuan, Nano-science and Nano-technology Research Center,Shanghai University, Shanghai 200444, China
Michel Drache, UCCS: Unité de Catalyse et de Chimie du Solide - UMR CNRS 8181,Villeneuve d’Ascq Cedex 59652, France; |
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Abstract: |
Using analytically pure Bi2O3 and Er2O3 as raw materials, the precursor of Bi and Er can be precipitated by reverse titration co-precipitation method, and the adequate pH value for co-precipitation was also analyzed. Bi0.75Er0.25O1.5 nano-powder was obtained after calcining this precursor at 500oC for 3h. High temperature XRD results showed that this nanopowder was mainly in ?? form, with an average grain size of 10nm calculated by Scherrer Equation, which transformed into ? form completely at 650oC. According to the thermodynamic calculation, the suitable temperature and partial pressure of oxygen was chose. Finally, dense ?-Bi0.75Er0.25O1.5 solid electrolyte was sintered at 500oC (measured temperature) for 1min, with a relative density of 96% and an average grain size of 18nm.
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