Structure and surface characterization of ZrO_2-Y_2O_3-Cr_2O_3 system

I.A. Yashchishyn; A.M. Korduban; T.E. Konstantinova; I.A. Danilenko; G.K. Volkova; V.A. Glazunova; V.O. Kandyba

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Structure and surface characterization of ZrO_2-Y_2O_3-Cr_2O_3 system

机译：ZrO_2-Y_2O_3-Cr_2O_3体系的结构与表面表征

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摘要

3-mol% Y_2O_3 and 0.3 to 3-mol % Cr_2O_3 co-doped ZrO_2 nanopowders were synthesized using co-precipitation technique and investigated by terms of X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. Structural analysis shows no significant impact of chromium on powders structure except of presence of small amount of m-phase. Surface analysis reveals segregation of yttrium and chromium atoms to the surface along with surface enrichment by oxygen that can be attributed to residual water. Chromium surface atoms present in three oxidation states with catalytically active Cr~(2+) sites possibly controlling m-phase appearance through lattice distortion.

机译：采用共沉淀技术合成了3mol％的Y_2O_3和0.3〜3mol％的Cr_2O_3共掺杂的ZrO_2纳米粉，并通过X射线衍射，透射电子显微镜和X射线光电子能谱进行了研究。结构分析表明，除了少量的m相外，铬对粉末结构没有重大影响。表面分析表明，钇和铬原子向表面偏析，同时由于氧气而使表面富集，这归因于残留水。铬表面原子以三种氧化态存在，具有催化活性的Cr〜（2+）位，可能通过晶格畸变控制m相的出现。

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来源
《Applied Surface Science》 |2010年第23期|P.7175-7177|共3页
作者
I.A. Yashchishyn; A.M. Korduban; T.E. Konstantinova; I.A. Danilenko; G.K. Volkova; V.A. Glazunova; V.O. Kandyba;
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Donetsk Institute for physics and engineering named after O.O. Galkin of the NAS of Ukraine, R. Luxembourg str. 72, 83114, Donetsk, Ukraine;

rnKurdumov G.V. Institute for metals physics of the NAS of Ukraine, Vernadskiy blv. 36, 03003, Kiev, Ukraine;

rnDonetsk Institute for physics and engineering named after O.O. Galkin of the NAS of Ukraine, R. Luxembourg str. 72, 83114, Donetsk, Ukraine;

rnDonetsk Institute for physics and engineering named after O.O. Galkin of the NAS of Ukraine, R. Luxembourg str. 72, 83114, Donetsk, Ukraine;

rnDonetsk Institute for physics and engineering named after O.O. Galkin of the NAS of Ukraine, R. Luxembourg str. 72, 83114, Donetsk, Ukraine;

rnDonetsk Institute for physics and engineering named after O.O. Galkin of the NAS of Ukraine, R. Luxembourg str. 72, 83114, Donetsk, Ukraine;

rnKurdumov G.V. Institute for metals physics of the NAS of Ukraine, Vernadskiy blv. 36, 03003, Kiev, Ukraine;

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正文语种 eng
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关键词
nanopowders; zirconium; chromium; yttrium; XPS; segregation; oxidation states;

机译：纳米粉;锆;铬;钇;XPS;隔离氧化态;

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Structure and surface characterization of ZrO_2-Y_2O_3-Cr_2O_3 system

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