Refractive index of Y_2O_3 stabilized cubic zirconia: variation with composition and wavelength

Wood, D. L.; Nassau, K.; Kometani, T. Y.

doi:10.1364/ao.29.002485

Cited by 53 publications

(22 citation statements)

References 5 publications

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“…The high film oxidation rate is a consequence of the fact that YSZ is an excellent oxygen ion conductor. 13 The velocity of the reaction front is higher at higher temperatures, which is consistent with the expectation of faster oxygen diffusion at higher temperatures.…”

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confidence: 87%

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Oblique ion texturing of yttria-stabilized zirconia: the {211}〈111〉 structure

Berdahl

Reade

Liu

et al. 2003

Applied Physics Letters

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Amorphous (Zr,Y)Ox films were synthesized by reactive magnetron sputtering and subsequently crystallized by oblique ion bombardment. Crystalline texture nucleated by the ion beam was replicated by solid-phase epitaxial growth throughout the formerly amorphous yttria-stabilized zirconia (YSZ) film. The resulting YSZ films have (211) orientation normal to the substrate with in-plane directions (111), parallel, and (110), transverse, to the azimuth of the ion beam. We hypothesize that the texture mechanism involves ion-induced film compression and shear. The results, taken together with prior work, show that oblique ion texturing of amorphous films is a general phenomenon that can be used to fabricate substrates with more than one type of crystallographic orientation.

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confidence: 87%

“…Here, it has been assumed that the YSZ film is fully dense, and has a refractive index of 2.1 13 . That is, the thickness is an optical value determined from the locations of the minima and maxima of the reflectance curve.…”

mentioning

confidence: 99%

Oblique ion texturing of yttria-stabilized zirconia: the {211}〈111〉 structure

Berdahl

Reade

Liu

et al. 2003

Applied Physics Letters

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“…It was shown that index of refraction increases linearly with temperature but the temperature coefficient in the interval between 20 and 130°C appears to be very small: 1.6 · 10 À5 K À1 at k = 0.36 lm and 0.62 · 10 À5 K À1 at k = 1.6 lm. More detailed data for n(k) in the range 0.36 < k < 5.5 lm at various mole fractions of yttria can be found in [14]. It was shown that index of refraction decreases monotonically with yttria stabilizer concentration in the range between 10.9 and 32.4 mol.% Y 2 O 3 .…”

Section: The Data From the Literaturementioning

confidence: 97%

Near-infrared radiative properties of porous zirconia ceramics

Dombrovsky

Kamdem

Baillis

et al. 2007

Infrared Physics & Technology

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“…In the first, the densities of films were calculated from measured optical refractive index values using the Lorentz-Lorenz law 13 and the known refractive index dependence on composition for fully dense YSZ. 14 Values of 93Ϯ2% of bulk density were found, with no measurable dependence of density on growth temperature.…”

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confidence: 91%

Grain-size-dependent thermal conductivity of nanocrystalline yttria-stabilized zirconia films grown by metal-organic chemical vapor deposition

Soyez¹,

Eastman²,

Thompson³

et al. 2000

Applied Physics Letters

177

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A grain-size-dependent reduction in the room-temperature thermal conductivity of nanocrystalline yttria-stabilized zirconia is reported for the first time. Films were grown by metal-organic chemical vapor deposition with controlled grain sizes from 10 to 100 nm. For grain sizes smaller than approximately 30 nm, a substantial reduction in thermal conductivity was observed, reaching a value of less than one-third the bulk value at the smallest grain sizes measured. The observed behavior is consistent with expectations based on an estimation of the phonon mean-free path in zirconia. © 2000 American Institute of Physics. ͓S0003-6951͑00͒05034-8͔The efficiency of gas turbine engines is dictated by the maximum sustained operating temperature of their typically Ni-or Co-based alloy turbine rotors. The development of new, higher temperature, high-strength, lightweight alloys is desirable. 1 However, recent studies have concluded that significant near-term progress in increasing turbine engine operating temperatures is more likely to come from the development of improved thermal barrier coatings ͑TBCs͒, typically yttria-stabilized zirconia ͑YSZ͒, than from the design of new alloys. 2 New processing techniques that result in TBC microstructures with lower thermal conductivity could lead either to higher operating temperatures of turbine engines, resulting in greater efficiency, or thinner coatings for the same operating temperature, which would reduce overall weight. Nanocrystalline YSZ coatings are of interest because they offer the possibility of lowering thermal conductivity, and may also provide additional benefits for TBC applications because of the possibility of improved toughness and ductility compared to that of coarser-grained ceramics. 3,4 The low thermal conductivity of YSZ ͑ϳ2.3 W/mK for high-density, polycrystalline material with a yttria-content of 10 mol. % at 20°C 5 ͒ is due primarily to phonon scattering by vacancies on the material's highly defective oxygen sublattice. 6 The potential for reduced thermal conductivity in nanocrystalline coatings arises from the predicted enhanced phonon scattering due to the presence of numerous closely spaced grain boundaries. For example, Klemens and Gell 6 have theoretically predicted that the room temperature thermal conductivity of 10 nm grain-sized YSZ containing 7 wt. % Y 2 O 3 will be decreased more than 50% compared to 1 m grain-sized YSZ of the same composition. The goal of the present study was to experimentally determine the effect of grain size on the room-temperature thermal conductivity of YSZ, thus contributing to the fundamental understanding of grain-size-dependent phonon scattering processes.Nanocrystalline YSZ films were grown by metal-organic chemical vapor deposition ͑MOCVD͒ using a low-pressure, horizontal, cold-walled deposition system. Yttrium b-diketonate ͓Y͑thd͒ 3 ͔ and zirconium t-butoxide ͓ZrOC͑CH 3 ͒ 4 ͔ 7 were chosen as precursor materials. Highpurity nitrogen was used as the precursor carrier gas. The precursors were mixed with high-purity ...

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Refractive index of Y_2O_3 stabilized cubic zirconia: variation with composition and wavelength

Cited by 53 publications

References 5 publications

Oblique ion texturing of yttria-stabilized zirconia: the {211}〈111〉 structure

Oblique ion texturing of yttria-stabilized zirconia: the {211}〈111〉 structure

Near-infrared radiative properties of porous zirconia ceramics

Grain-size-dependent thermal conductivity of nanocrystalline yttria-stabilized zirconia films grown by metal-organic chemical vapor deposition

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