Shift in low-frequency vibrational spectra measured in-situ at 600 °C by Raman spectroscopy of zirconia developed on pure zirconium and Zr–1%Nb alloy

Kurpaska, Ł.; Leśniak, Magdalena; Jadach, R.; Sitarz, Maciej; Jasiński, J.; Grosseau-Poussard, Jean-Luc

doi:10.1016/j.molstruc.2016.03.001

Cited by 17 publications

(21 citation statements)

References 25 publications

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“…Some of the peak positions in the ZrO 2 :Sm 3+ sample are shifted, with a shift of about 2 cm –1 , toward a lower wave number when compared to pure ZrO 2 . The shift is ascribed to the difference in ionic radii of host and dopant ions, changes observed of the crystallite size, and the changing stoichiometry level in the oxygen sublattice …”

Section: Resultsmentioning

confidence: 99%

“…The shift is ascribed to the difference in ionic radii of host and dopant ions, changes observed of the crystallite size, and the changing stoichiometry level in the oxygen sublattice. 60 The TEM micrographs of the ZrO 2 and ZrO 2 :Sm 3+ samples are shown in Figure 4a,b and their corresponding selected area electron diffraction (SAED) images are shown in Figure 4c,d, respectively. Most of the particles are on the nanoscale, almost spherical in shape, but have a nonuniform size.…”

Section: ■ Introductionmentioning

confidence: 99%

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Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO₂ and Spectroscopic Properties of ZrO₂:Sm³⁺ Phosphor

et al. 2021

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Ion beam analysis methods are very sensitive to analyze the defects and impurities in insulators and semiconductors. The present study focuses on an investigation of the nature of defects in monoclinic ZrO 2 and spectroscopic properties of ZrO 2 :Sm 3+ (1 mol %) phosphor using ionoluminescence (IL) under the excitation of 100 MeV Si 7+ ions. The structures of the combustion-synthesized ZrO 2 and ZrO 2 :Sm 3+ samples were revealed to be monoclinic as analyzed through X-ray diffraction, Raman spectroscopy, and selected area electron diffraction methods. Structural parameters were assessed utilizing Rietveld refinement of the obtained XRD data using GSAS II software. The average particle size of ZrO 2 and ZrO 2 :Sm 3+ samples was found to be 77 ± 2 and 72 ± 3 nm, respectively, as determined from transmission electron microscopy images. The electronic structure and the oxygen vacancy defect population were analyzed using experimental measurements [viz ionoluminescence (IL), photoluminescence (PL), PL lifetime decay, electron paramagnetic resonance (EPR), and diffuse reflectance spectroscopy (DRS)]. The prominent IL and PL emission peaks seen at 499 nm in monoclinic ZrO 2 are attributed to the F + type center that was assigned to the F 2 + centeran aggregate of the singly ionized oxygen vacancies. ZrO 2 :Sm 3+ (1 mol %) samples display Sm 3+ characteristic IL emission peaks between 562−582, 600−620, 635−673, and 719 nm, corresponding to ( 4 G 5/2 → 6 H 5/2 ), ( 4 G 5/2 → 6 H 7/2 ), ( 4 G 5/2 → 6 H 9/2 ), and ( 4 G 5/2 → 6 H 11/2 ) transitions under 100 MeV Si 7+ ion excitation for various fluences. The 100 MeV Si 7+ ion-induced ion track radius (damaged cross section) and local temperature were estimated through the thermal spike model to be 0.53 nm and 700 K (the duration is about 10 −13 second), respectively. CIE coordinates fall near the yellow color region and then slightly shift toward the green color region with an increase of fluence because of the lattice distortion and change of the Sm 3+ symmetry site.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO₂ and Spectroscopic Properties of ZrO₂:Sm³⁺ Phosphor

et al. 2021

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“…According to the literature, various functions were used for fitting, mainly: Lorentzian, Gaussian, Voigt (a convolution of Lorentzian and Gaussian), and Pseudovoigt (a sum of Lorentzian and Gaussian) [18]- [22]. When selecting fitting function, physical meaning that the function represents should be taken into consideration first and matching the shape of the spectra should only be the consequence of it.…”

Section: Selection Of Functions and Range Of Fittingmentioning

confidence: 99%

Comparison of Raman imaging assessment methods in phase determination and stress analysis of zirconium oxide layer

Suchorab

Kurpaska

Gawęda

2023

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…During long-term expositions several kinetic transitions occur and the overall kinetic of oxidation is approximately linear. The point of change in growth rate is determined by thickness of oxide layer and is called transition point (or transition thickness) [6,9,10,[13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Raman study of oxide layers on zirconium alloys using ¹⁸O tracers

Sialini

Sajdl

Dobrovolný

2020

Corrosion Engineering, Science and Technology

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In this work, samples of zirconium alloys Zr1Nb and Zircaloy-4W were subjected to two-stage oxidation experimentsat first in H 2 16 O solution and then in H 2 18 O steam. Raman spectroscopy was used to analyse distribution of 18 O isotope in corrosion layers of the alloys. Layered distribution of 18 O was observed in case of Zr1Nb samples; Zircaloy-4W had 18 O present only at metal/oxide interface. This observation is attributed to differing kinetic transitions, which influence transport of oxygen through oxide layer.

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Shift in low-frequency vibrational spectra measured in-situ at 600 °C by Raman spectroscopy of zirconia developed on pure zirconium and Zr–1%Nb alloy

Cited by 17 publications

References 25 publications

Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO₂ and Spectroscopic Properties of ZrO₂:Sm³⁺ Phosphor

Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO₂ and Spectroscopic Properties of ZrO₂:Sm³⁺ Phosphor

Comparison of Raman imaging assessment methods in phase determination and stress analysis of zirconium oxide layer

Raman study of oxide layers on zirconium alloys using ¹⁸O tracers

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Shift in low-frequency vibrational spectra measured in-situ at 600 °C by Raman spectroscopy of zirconia developed on pure zirconium and Zr–1%Nb alloy

Cited by 17 publications

References 25 publications

Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO2 and Spectroscopic Properties of ZrO2:Sm3+ Phosphor

Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO2 and Spectroscopic Properties of ZrO2:Sm3+ Phosphor

Comparison of Raman imaging assessment methods in phase determination and stress analysis of zirconium oxide layer

Raman study of oxide layers on zirconium alloys using 18O tracers

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Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO₂ and Spectroscopic Properties of ZrO₂:Sm³⁺ Phosphor

Unraveling the Charge State of Oxygen Vacancies in Monoclinic ZrO₂ and Spectroscopic Properties of ZrO₂:Sm³⁺ Phosphor

Raman study of oxide layers on zirconium alloys using ¹⁸O tracers