The Raman spectrum of zirconium dioxide

Thackeray, D. P. C.

doi:10.1016/0584-8539(74)80096-6

Cited by 39 publications

(6 citation statements)

References 3 publications

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“…These Raman active modes are similar to those expected from theory and reported by Thackeray [5]. They are characteristic of the tetragonal ZrO2 phase.…”

Section: Resultssupporting

confidence: 81%

Planar ZrO2 waveguides prepared by the sol-gel process: Structural and optical properties

Urlacher

Dumas

Serughetti

et al. 1997

J Sol-Gel Sci Technol

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Abstract. ZrO2 waveguides are prepared by the sol-gel process from a solution containing zirconium n-propoxide and acetylacetone in propanol-2. Structural characterizations are investigated for different annealing temperatures using suitable techniques including Waveguide Raman Spectroscopy, Electron Microscopy and Atomic Force Microscopy. Films are amorphous at 300~ and the pure ZrO2 tetragonal crystalline phase appears beyond 400~ Crystallized films present a dense, uniform and polycrystalline structure made up by randomly oriented nanocrystallites, the diameter of which increases from 38/~ at 400~ to 53/~ at 600~ Waveguides are at least monomode TE0 at 632.8 nm. At this wavelength, optical losses are about 0.8 4-0.2 dB/cm for amorphous layers and increase up to 2.5 4-0.4 dB/cm for 600~ heat-treated waveguides.

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“…These Raman active modes are similar to those expected from theory and reported by Thackeray [5]. They are characteristic of the tetragonal ZrO2 phase.…”

Section: Resultssupporting

confidence: 81%

Planar ZrO2 waveguides prepared by the sol-gel process: Structural and optical properties

Urlacher

Dumas

Serughetti

et al. 1997

J Sol-Gel Sci Technol

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“…The peak, centered at 269 cm −1 , was a typical characteristic peak for the tetragonal phase and showed the characteristics of an asymmetric Zr-O-Zr stretching mode [40]. It was reported that the shift of this peak to a lower wavenumber is due to the movement of oxygen [41]. The calculated results of the XRD and the 532 nm Raman spectroscopy showed that the tetragonal phase content in the ZrO 2 (P) was higher than that in the ZrO 2 (H).…”

Section: Resultsmentioning

confidence: 99%

Synergistic Effect of Oxygen Vacancies and Ni Species on Tuning Selectivity of Ni/ZrO2 Catalyst for Hydrogenation of Maleic Anhydride into Succinic Anhydride and γ-Butyrolacetone

Zhao

et al. 2019

Nanomaterials

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ZrO2 nanoparticles, ZrO2 (P) and ZrO2 (H), with different tetragonal phase contents, were prepared. ZrO2 (P) possessed higher tetragonal phase content than ZrO2 (H). Ni/ZrO2 catalysts (10% (w/w)), using ZrO2 (P) and ZrO2 (H) as supports, were prepared using an impregnation method, and were characterized using XRD, Raman, H2-TPR, XPS, and H2-TPD techniques. Their catalytic performance in maleic anhydride hydrogenation was tested. The Ni/ZrO2 (P) catalyst exhibited stronger metal-support interactions than the Ni/ZrO2 (H) catalyst because of its higher number of oxygen vacancies and the low-coordinated oxygen ions on its surface. Consequently, smaller Ni crystallites and a higher C=C hydrogenation activity for maleic anhydride to succinic anhydride were obtained over a Ni/ZrO2 (P) catalyst. However, the C=O hydrogenation activity of Ni/ZrO2 (P) catalyst was much lower than that of the Ni/ZrO2 (H) catalyst. A 43.5% yield of γ-butyrolacetone was obtained over the Ni/ZrO2 (H) catalyst at 210 °C and 5 MPa of H2 pressure, while the yield of γ-butyrolactone was only 2.8% over the Ni/ZrO2 (P) catalyst under the same reaction conditions. In situ FT-IR characterization demonstrated that the high C=O hydrogenation activity for the Ni/ZrO2 (H) catalyst could be attributed to the surface synergy between active metallic nickel species and relatively electron-deficient oxygen vacancies.

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“…expected, vibrational spectroscopy has been used widely in the past to characterize zirconia preparations. [17][18][19][20][21][22] Actually, Raman spectra are generally well defined and very useful for characterization, while IR spectra are more difficult to apply. Additionally, some discrepancies can be seen in earlier reports.…”

Section: Ft-ir/ft-fir and Raman Skeletal Spectramentioning

confidence: 99%

Vibrational and electronic spectroscopic properties of zirconia powders

et al. 2001

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Ten zirconia powders have been characterized by XRD, FT-IR/FT-FIR and Raman skeletal spectroscopies and DR-UV electronic spectroscopy. The vibrational features of a yttria-stabilized cubic zirconia and of tetragonal, monoclinic and tetragonal + monoclinic pure zirconia mixtures have been discussed. Assignments for the vibrational features of cubic and tetragonal samples are proposed. The origin of very broad vibrational peaks in tetragonal zirconia is briefly addressed. The vibrational spectra provide evidence for the presence of trigonal oxide ions in the monoclinic phase only. The UV spectra show that monoclinic zirconia (where the coordination of zirconium is sevenfold) absorbs at lower energy than the cubic and tetragonal phases (where the coordination of zirconium is eightfold). However, it absorbs at higher energy than the perovskite SrZrO3 where Zr adopts octahedral coordination. The origin of the shifts of the corresponding absorption edges is discussed

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The Raman spectrum of zirconium dioxide

Cited by 39 publications

References 3 publications

Planar ZrO2 waveguides prepared by the sol-gel process: Structural and optical properties

Planar ZrO2 waveguides prepared by the sol-gel process: Structural and optical properties

Synergistic Effect of Oxygen Vacancies and Ni Species on Tuning Selectivity of Ni/ZrO2 Catalyst for Hydrogenation of Maleic Anhydride into Succinic Anhydride and γ-Butyrolacetone

Vibrational and electronic spectroscopic properties of zirconia powders

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