Work Function of PbZrO3 |
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| Authors: | Sugihara S Bak T Nowotny J Radecka M Sorrell C C |
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| Affiliation: | (1) Department of Materials Science and Ceramic Technology, Shonan Institute of Technology, 1-1-25 Tsujido-Nishikaigan, Fujisawa, Kanagawa, 251, Japan;(2) School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia;(3) University of Mining and Metallurgy, 30-059 Cracow, Poland |
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| Abstract: | This paper reports the results of work function (WF) changes of undoped PbZrO3 during subsequent isothermal oxidation and reduction experiments at 500°C in the p(O2) range between 10 and 2.1 × 104 Pa. The results, obtained during three consecutive runs, indicate that heating at 500°C leads to continuous changes of surface properties resulting in a complex WF vs. time characteristic. The WF changes during the first oxidation are determined by a p(O2)-induced structural transition. The second oxidation results in two competitive processes, such as rapid increase of oxygen non-stoichiometry followed by a structural transition. Finally, the third oxidation is determined by changes of oxygen nonstoichiometry. |
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| Keywords: | PbZrO3 oxidation nonstoichiometry |
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