Mössbauer and X-ray Diffraction Studies of Cubic Solid Solutions of the ZrO2-Y2O3-Fe2O3 System

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• 作者：A. G. Belous ; E. V. Pashkova ; K. V. Kravchyk ; V. P. Ivanitskii ; O. I. V'yunov
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：March 13, 2008
• 年：2008
• 卷：112
• 期：10
• 页码：3914 - 3919
• 全文大小：156K
• 年卷期：v.112,no.10(March 13, 2008)
• ISSN：1932-7455

文摘

The effect of iron oxide on the polymorphic composition and thin structure of cubic solid solutions of the(ZrO₂)_0.9(Y₂O₃)_0.1-x(Fe₂O₃)_x system has been investigated. The maximum Fe₂O₃ solubility in the studied cutof the ternary system has been determined to be 2 mol %. Iron exists only as Fe³⁺ ions in octahedral co-ordination. Three nonequivalent positions of the Fe³⁺ ions, which differ in surrounding cations and anions,have been identified. It has been shown that Fe₂O₃ is not a stabilizer of the high-temperature modificationsof ZrO₂, but it promotes the stabilizing action (efficiency) of Y₂O₃ and structure stability in time due to theformation of the compound YFeO₃ with structure isomorphic to c-ZrO₂.