Raman spectroscopy of perovskite-type BaCe{sub x}Zr{sub 1{minus}x}O{sub 3} (0 {le} x {le} 1)
- INPG-CNRS, Saint-Martin-d`Heres (France). Lab d`Electrochimie et de Physicochimie des Materiaux et Interfaces
Polycrystalline samples of BaCe{sub x}Zr{sub 1{minus}x}O{sub 3} were prepared by solid state reaction. X-ray diffraction measurements show that all compounds are single-phase and XRD patterns can be indexed on the basis of the ideal perovskite structure. However, Raman data show that BaCe{sub x}Zr{sub 1{minus}x}O{sub 3} exhibits slight x-dependent distortions from the ideal perovskite structure. Indeed the evolution of Raman spectra of BaCe{sub x}Zr{sub 1{minus}x}O{sub 3}, as x decreases at room temperature or as temperature increases for a given x value, is similar to the evolution of Raman spectra of BaCeO{sub 3} as temperature increases. These observations lead us to propose a phase diagram in the binary system BaCeO{sub 3}-BaZrO{sub 3} based on the known structures of BaCeO{sub 3} (Pnma, Imma, R{bar 3}c, and Pm3m).
- OSTI ID:
- 329134
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 142; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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