Lattice variation of cubic Y2O3 in three dimensions: Temperature, pressure and crystal size

Barad, Chen; Kimmel, G.; Rosen, Brian A.; Sahartov, Alla; Hayun, Hagay; Zabicky, Jacob; Gelbstein, Yaniv

doi:10.1016/j.jallcom.2021.161199

Cited by 6 publications

(4 citation statements)

References 46 publications

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“…The increasing trend of the lattice parameter with increasing Y 2 O 3 doping level may also be attributed in part to the weakened attractive forces between oppositely‐charged ions due to extrinsic oxygen vacancies introduced by Y 2 O 3 doping 51 . The lattice parameter of the pure Y 2 O 3 film (Zr0Y8) is also estimated in the same way to be 1.056 nm, which is consistent with that of cubic Y 2 O 3 (1.061 nm) 52 . The thickness of the Y 2 O 3 film is ∼64 nm, thicker than the ZrO 2 and YSZ films.…”

Section: Resultssupporting

confidence: 69%

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Thermal conductivity of yttria‐stabilized zirconia thin films grown by plasma‐enhanced atomic layer deposition

et al. 2023

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Zirconia doped with yttrium, widely known as yttria-stabilized zirconia (YSZ), has found recent applications in advanced electronic and energy devices, particularly when deposited in thin film form by atomic layer deposition (ALD).Although ample studies reported the thermal conductivity of YSZ films and coatings, these data were typically limited to Y 2 O 3 concentrations around 8 mol% and thicknesses greater than 1 μm, which were primarily targeted for thermal barrier coating applications. Here, we present the first experimental report of the thermal conductivity of YSZ thin films (∼50 nm), deposited by plasma-enhanced ALD (PEALD), with variable Y 2 O 3 content (0-36.9 mol%). Time-domain thermoreflectance measures the effective thermal conductivity of the film and its interfaces, independently confirmed with frequency-domain thermoreflectance. The effective thermal conductivity decreases from 1.85 to 1.22 W m −1 K −1 with increasing Y 2 O 3 doping concentration from 0 to 7.7 mol%, predominantly due to increased phonon scattering by oxygen vacancies, and exhibits relatively weak concentration dependence above 7.7 mol%. The effective thermal conductivities of our PEALD YSZ films are higher by ∼15%-128% than those reported previously for thermal ALD YSZ films with similar composition. We attribute this to the relatively larger grain sizes (∼23-27 nm) of our films.

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Section: Resultssupporting

confidence: 69%

“…51 The lattice parameter of the pure Y 2 O 3 film (Zr0Y8) is also estimated in the same way to be 1.056 nm, which is consistent with that of cubic Y 2 O 3 (1.061 nm). 52 The thickness of the Y 2 O 3 film is ∼64 nm, thicker than the ZrO 2 and YSZ films. The Al transducer thicknesses are within the range of 94-97 nm in all the samples.…”

Section: Resultsmentioning

confidence: 96%

Thermal conductivity of yttria‐stabilized zirconia thin films grown by plasma‐enhanced atomic layer deposition

et al. 2023

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“…The present study confirmed the two stages of lattice parameter dependence - lattice contraction and lattice expansion are existing with decreasing the grain size nanoscale crystals, with a minimum lattice parameter for intermediate nano sizes, and a further increase for smaller sizes. According to this study and our previous studies [ 42 , 76 ], the non-monotonic lattice variation in nano-crystalline ionic materials is the general case. The non-monotonic lattice variation in nanomaterials calls for adding a new category in the crystallographic data bases: “nano-crystals”, where lattice parameters are recorded along with grain size.…”

Section: Discussionsupporting

confidence: 62%

Lattice variation as a function of concentration and grain size in MgO–NiO solid solution system

Barad,

Kimmel,

Opalińska

et al. 2024

Heliyon

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“…At low temperatures, most oxides have a C-type cubic structure [12]. Depending on the calculation method and experimental technique, the lattice constant of cubic Gd 2 O 3 varies from 10.812 to 10.843 Å [9,12,13], of bixbyite-type Y 2 O 3 varies from 10.572 to 10.615 Å [14][15][16] at room temperature and normal pressure. In our case, the lattice constants were 10.816 and 10.607 Å for Gd 2 O 3 and Y 2 O 3 , respectively.…”

Section: Xrd Studiesmentioning

confidence: 99%

Structural and Luminescence Properties of (Gd1−xYx)2O3 Powders Doped with Nd3+ Ions for Temperature Measurements

et al. 2022

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Rare earth activated powders are widely regarded as promising candidates for optical thermometry due to their unique photoluminescence characteristics. The paper presents the structural and luminescent properties of crystalline powders of gadolinium and yttrium oxides (Gd1−xYx)2O3, doped with Nd3+ ions, synthesized by the liquid polymer-salt method. The addition of polyvinylpyrrolidone increases the homogeneity of the mixture and ensures high adhesion of the resulting powders. Scanning electron microscopy shows that powders are mm-sized aggregates, which consist of particles with several tens of nanometers in size. A smooth shift of the diffraction peaks of the powders occurs when Gd is replaced by Y without additional peaks. The successive decrease in the lattice constant of the powders from 10.816 to 10.607 Å confirms the existence of continuous solid solutions in the system. The Stark sublevels of the 4F3/2 → 4I9/2 fluorescent band are shifted to 4 nm when Gd is replaced by Y since the strength of the local field has a stronger effect on the inner F-shell of Nd ions in the case of Y. For thermometry, we chose the ratio of the fluorescence intensities between the Stark sublevels 4F3/2(2) → 4I9/2(2) and 4F3/2(1) → 4I9/2(2). The best obtained sensitivity is 0.22% °C−1 for Nd-doped GdYO3 powder in the range of 10–70 °C. This value of temperature sensitivity, together with radiation and excitation lying in the biological window, opens the possibility of using Nd3+-doped (Gd1-xYx)2O3 powders for real-time thermal probing of under tissue luminescence with sub-degree resolution.

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Lattice variation of cubic Y2O3 in three dimensions: Temperature, pressure and crystal size

Cited by 6 publications

References 46 publications

Thermal conductivity of yttria‐stabilized zirconia thin films grown by plasma‐enhanced atomic layer deposition

Thermal conductivity of yttria‐stabilized zirconia thin films grown by plasma‐enhanced atomic layer deposition

Lattice variation as a function of concentration and grain size in MgO–NiO solid solution system

Structural and Luminescence Properties of (Gd1−xYx)2O3 Powders Doped with Nd3+ Ions for Temperature Measurements

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