A study of phosphors in the yttrium oxide-silicon dioxide phase system

Born, P. J.; Robertson, D. S.; Smith, P. C.

doi:10.1007/bf00720016

Cited by 8 publications

(6 citation statements)

References 3 publications

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“…π}. Therefore, for example, we observe from experiment that B u TO modes labeled 2, 3,4,6,9,11,12,13,15,17,18,19, and 21 are all oriented with negative angle towards axis a.…”

Section: Dielectric Tensor Analysismentioning

confidence: 92%

“…Their unique optical properties render these materials highly suitable, for example, in optical applications as active laser mediums, [1][2][3][4][5][6] in optical signal processing 7,8 and in quantum optics. [9][10][11] Rare-earth Ce 3+ or Eu 3+ doped monoclinic yttrium orthosilicate (Y 2 SiO 5 ) can be used as phosphorous material [12][13][14][15][16] or as scintillator material for detection of x-rays and γ-rays. 17 Cr 4+ doped Y 2 SiO 5 has been studied for use as saturable absorber in Q-switching laser devices.…”

Section: Introductionmentioning

confidence: 99%

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Anisotropy and phonon modes from analysis of the dielectric function tensor and the inverse dielectric function tensor of monoclinic yttrium orthosilicate

et al. 2018

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We determine the frequency dependence of the four independent Cartesian tensor elements of the dielectric function for monoclinic symmetry Y2SiO5 using generalized spectroscopic ellipsometry from 40-1200 cm −1 . Three different crystal cuts, each perpendicular to a principle axis, are investigated. We apply our recently described augmentation of lattice anharmonicity onto the eigendielectric displacement vector summation approach [A. Mock et al., Phys. Rev. B 95, 165202 (2017)], and we present and demonstrate the application of an eigendielectric displacement loss vector summation approach with anharmonic broadening. We obtain excellent match between all measured and model calculated dielectric function tensor elements and all dielectric loss function tensor elements. We obtain 23 Au and 22 Bu symmetry long wavelength active transverse and longitudinal optical mode parameters including their eigenvector orientation within the monoclinic lattice. We perform density functional theory calculations and obtain 23 Au symmetry and 22 Bu transverse and longitudinal optical mode parameters and their orientation within the monoclincic lattice. We compare our results from ellipsometry and density functional theory and find excellent agreement. We also determine the static and above reststrahlen spectral range dielectric tensor values and find a recently derived generalization of the Lyddane-Sachs-Teller relation for polar phonons in monoclinic symmetry materials satisfied [M. Schubert, Phys. Rev. Lett. 117, 215502 (2016)].

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“…π}. Therefore, for example, we observe from experiment that B u TO modes labeled 2, 3,4,6,9,11,12,13,15,17,18,19, and 21 are all oriented with negative angle towards axis a.…”

Section: Dielectric Tensor Analysismentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Anisotropy and phonon modes from analysis of the dielectric function tensor and the inverse dielectric function tensor of monoclinic yttrium orthosilicate

et al. 2018

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“…The gases damage the FED tips to cause the eventual failure of the FEDs screen. Ce-doped Y 2 SiO 5 (YSO:Ce) has been used as a blue phosphor for projection televisions (PTVs) because of its stability against high-current density electron beam [3,4]. This can also be an alternative for the ZnS:Ag phosphor in the FED application.…”

Section: Introductionmentioning

confidence: 99%

Concentration effect of cerium in (Y0.9−xGd0.1Cex)2SiO5 blue phosphor

Yokota

Yoshida

Ishibashi

et al. 2010

Journal of Alloys and Compounds

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“…It can be seen from phase diagram (Figure S3) that Y 2 O 3 and SiO 2 cannot form liquid phase at 1500 • C, but Y 2 Si 4 O 11 . 30 The XRD patterns (Figure 5) show that the final product with CaO as additive only contains β-Si 3 N 4 and no Ca compound, which proves that the liquid phase has been completely volatilized. However, the final product with Y 2 O 3 as an additive contains a lot of residual Y compounds, and the proportion of β-Si 3 N 4 is very small.…”

Section: Resultsmentioning

confidence: 98%

Synthesis of spherical Si₃N₄ powders by liquid‐phase modified carbothermal reduction and nitridation

Zhao,

Du,

Sun

et al. 2023

J Am Ceram Soc.

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Abstractβ‐Si3N4 powder with well‐dispersed spherical particles was synthesized by liquid‐phase modified carbothermal reduction and nitridation. The influence of the type and content of additives on the particle morphology was investigated. The liquid phase formed at the reaction temperature modifies the morphology of the Si3N4 powder. The Si3N4 products precipitated along the liquid‐solid interface, thus forming a spherical morphology and promoting the transformation from α‐Si3N4 to β‐Si3N4. The type of additives has a strong influence on the formation temperature and viscosity of the liquid phase and hence affects the product morphology. In the samples with CaF2 and CaO additives, sufficient liquid phase occurred and spherical particles were obtained. In the sample with Y2O3, however, the liquid phase was insufficient due to the higher formation temperature, thus resulting in an irregular particle morphology.

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A study of phosphors in the yttrium oxide-silicon dioxide phase system

Cited by 8 publications

References 3 publications

Anisotropy and phonon modes from analysis of the dielectric function tensor and the inverse dielectric function tensor of monoclinic yttrium orthosilicate

Anisotropy and phonon modes from analysis of the dielectric function tensor and the inverse dielectric function tensor of monoclinic yttrium orthosilicate

Concentration effect of cerium in (Y0.9−xGd0.1Cex)2SiO5 blue phosphor

Synthesis of spherical Si₃N₄ powders by liquid‐phase modified carbothermal reduction and nitridation

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A study of phosphors in the yttrium oxide-silicon dioxide phase system

Cited by 8 publications

References 3 publications

Anisotropy and phonon modes from analysis of the dielectric function tensor and the inverse dielectric function tensor of monoclinic yttrium orthosilicate

Anisotropy and phonon modes from analysis of the dielectric function tensor and the inverse dielectric function tensor of monoclinic yttrium orthosilicate

Concentration effect of cerium in (Y0.9−xGd0.1Cex)2SiO5 blue phosphor

Synthesis of spherical Si3N4 powders by liquid‐phase modified carbothermal reduction and nitridation

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Synthesis of spherical Si₃N₄ powders by liquid‐phase modified carbothermal reduction and nitridation