Quantitative Analysis of Phase Compositions of MgO-, CaO- or Y2O3-doped ZrO2

Abstract

Abstract: ZrO₂ powder doped with 8mol% MgO, CaO or Y₂O₃was prepared by co-precipitation technique. The densified and partially or fully stabilized ZrO₂ ceramics were obtained by sintering the powder under 1550℃. The quantitative analyscs of phase compositions of ZrO₂ ceramics were performed based on X-ray profile diffraction data and Rietveld inethod. The results show that ZrO₂ ceramics stabilized by MgO, CaO or Y₂O₃ with the same starting composition possess the different phase contents. MgO partially stabilized ZrO₂consists of cubic, tetragonal and monoclinic phases with the weight ratio of 17:57:26, CaO partially stabilized ZrO₂contains cubic and monoclinic phases with the weight ration of 68:32, Y₂O₃-doped ZrO₂shows almost a pure cubic phase with only 3wt% tetragonal one, however. In the paper, the influence of grain size on phase transformation of tetragonal to monodlinic of ZrO₂is also discussed.

Key words: ZrO₂, Rietveld method, quantitative analysis, multiphase powder

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WANG Peiling,DAIJian. Quantitative Analysis of Phase Compositions of MgO-, CaO- or Y₂O₃-doped ZrO₂[J]. Journal of Inorganic Materials.

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Quantitative Analysis of Phase Compositions of MgO-, CaO- or Y₂O₃-doped ZrO₂

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