Optical properties of transparent polycrystalline ruby (Cr:Al2O3) fabricated by high-pressure spark plasma sintering

Ratzker, Barak; Wagner, Avital; Favelukis, Bar; Goldring, Sharone; Kalabukhov, Sergey; Frage, N.

doi:10.1016/j.jeurceramsoc.2021.01.022

Cited by 13 publications

(19 citation statements)

References 34 publications

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“…reported in‐line transmittance of ∼39%, ∼49%, and ∼58% at 700 nm, respectively. The highest value of transmittance ∼72.5% at 700 nm was reached by Ratzker et al 45 . for ruby ceramic sample, with an average grain size of ∼180 nm, sintered by an SPS technique at a high pressure of 600 MPa.…”

Section: Photoluminescence In Rare Earth/transition Metal‐doped Trans...mentioning

confidence: 94%

“…The Al 2 O 3 :Ce 3+ with similar characteristics was prepared using SPS and characterized already before by Alvarez‐Clemares et al 43 . The SPS technique was successfully used in recent years to attain a high transparency of Al 2 O 3 :Eu 3+ and Al 2 O 3 :Cr 3+ exhibiting either photo‐ and/or thermoluminescent properties 44,45 . Moreover, transparent Al 2 O 3 :Cr 3+ for dosimetric applications was prepared in this way 46 …”

Section: An Overview Of Luminescent Pca Prepared So Farmentioning

confidence: 96%

“…Dependence of in‐line transmittance on the type and concentration of dopant in doped alumina sintered by spark plasma sintering (SPS), hot isostatic pressing (HIP), and vacuum sintering. Source : Data collected from works 21–23,27,40–43,45,48,54,55 …”

Section: Optical Transmission Of Luminescent Pca In Relation To Proce...mentioning

confidence: 99%

“…Dependence of in‐line transmittance on average grain size of differently densified alumina samples doped by Ce 3+ , Tb 3+ , Nd 3+ , Cr 3+ , Er 3+ , Dy 3+ , and Eu 3+ dopants. Source : Data collected from works 21–23,27,42,43,45,48,54,55 …”

Section: Optical Transmission Of Luminescent Pca In Relation To Proce...mentioning

confidence: 99%

“…This suggests that PCA could be a potential host material for phosphor and laser applications. Until now, the transparent ruby ceramics have been fabricated by vacuum sintering, 38 HIP, 48 and SPS technique 45,54,65,66 . For representative 0.5 at.% Cr ruby ceramics (0.8 mm thickness), Wang et al 65 ,.…”

Section: Photoluminescence In Rare Earth/transition Metal‐doped Trans...mentioning

confidence: 99%

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Photoluminescence of rare‐earth/transition metal‐doped transparent/translucent polycrystalline Al₂O₃ ceramics: A review

et al. 2022

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Transparent alumina doped with rare‐earth or transition metal oxides represents a group of materials suitable for optical applications. Because of the birefringence of alumina, their preparation is demanding on the quality of starting materials, their advanced shaping, and pressure‐assisted sintering. Spark plasma sintering and hot isostatic pressing have proven at achieving pore‐free fine microstructures exhibiting high in‐line transmission and a sufficient intensity of emitted light. The present review aims to summarize the results published on this topic, to compare them and on this base to propose other possible and/or appropriate approaches to future.

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Section: Photoluminescence In Rare Earth/transition Metal‐doped Trans...mentioning

confidence: 94%

Section: An Overview Of Luminescent Pca Prepared So Farmentioning

confidence: 96%

Section: Optical Transmission Of Luminescent Pca In Relation To Proce...mentioning

confidence: 99%

Section: Optical Transmission Of Luminescent Pca In Relation To Proce...mentioning

confidence: 99%

Section: Photoluminescence In Rare Earth/transition Metal‐doped Trans...mentioning

confidence: 99%

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Photoluminescence of rare‐earth/transition metal‐doped transparent/translucent polycrystalline Al₂O₃ ceramics: A review

et al. 2022

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Thickness Effect of (0001) Textured Al₂O₃ Layer on the Optical and Mechanical Properties of MgAl₂O₄/Al₂O₃ Laminated Transparent Composite

Morita

Suzuki

2023

Adv Eng Mater

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The effect of the thickness of (0001) textured Al2O3 layer on the optical and mechanical properties is examined in the MgAl2O4/Al2O3 transparent laminated composite. The textured Al2O3 layers with various thicknesses are formed on the MgAl2O4 polycrystals using a magnetic field alignment technique followed by one step spark‐plasma‐sintering (SPS) processing. Depending on the thickness of the textured Al2O3 layer, the transmittance efficiency of the composite sensitively changes and attains the higher in‐line transmittance of Tin,0.64 ≈ 54% at a visible range of λ = 0.64 μm for the thin Al2O3 layer with a thickness of ≈400 μm. In addition to the transparency, the hardness Hv measured on the textured Al2O3 layer surface also changes sensitively with the thickness and can attain Hv = 30.4 GPa, which is much higher than 25.5 GPa of monolithic Al2O3 polycrystals. The higher hardness can be ascribed to residual stresses formed in the textured Al2O3 layer. These results indicate that by controlling both the thickness and the texture structure of the Al2O3 layer, the MgAl2O4/Al2O3 composite simultaneously achieves excellent optical and mechanical properties.

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Simplified Single‐Step Fabrication of Composite Transparent Ceramics

Ratzker,

Mottye,

Kalabukhov

et al. 2024

Adv Eng Mater

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Composite transparent ceramics offer various advantages over monolithic parts in many photonic applications. Typically, the formation of multicomponent composites requires elaborate processes that involve multiple steps of green body preparation and densification. This study presents a straightforward single‐step fabrication method for composite transparent ceramics using spark plasma sintering (SPS). The method utilizes customized compaction tools that enable specific powder arrangements within the graphite die, resulting in a configured green body can be directly densified. The versatile yet simple process was demonstrated for various composite designs, primarily comprising Nd3+:YAG and undoped YAG. The high transparency and precision of these composite ceramics render them suitable for prospective optical components such as high‐power lasers and phosphors. Overall, the proposed method applies to multicomponent functional ceramics and potentially any combination of sinterable materials with similar densification behavior and thermal expansion coefficients.This article is protected by copyright. All rights reserved.

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Optical properties of transparent polycrystalline ruby (Cr:Al2O3) fabricated by high-pressure spark plasma sintering

Cited by 13 publications

References 34 publications

Photoluminescence of rare‐earth/transition metal‐doped transparent/translucent polycrystalline Al₂O₃ ceramics: A review

Photoluminescence of rare‐earth/transition metal‐doped transparent/translucent polycrystalline Al₂O₃ ceramics: A review

Thickness Effect of (0001) Textured Al₂O₃ Layer on the Optical and Mechanical Properties of MgAl₂O₄/Al₂O₃ Laminated Transparent Composite

Simplified Single‐Step Fabrication of Composite Transparent Ceramics

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Optical properties of transparent polycrystalline ruby (Cr:Al2O3) fabricated by high-pressure spark plasma sintering

Cited by 13 publications

References 34 publications

Photoluminescence of rare‐earth/transition metal‐doped transparent/translucent polycrystalline Al2O3 ceramics: A review

Photoluminescence of rare‐earth/transition metal‐doped transparent/translucent polycrystalline Al2O3 ceramics: A review

Thickness Effect of (0001) Textured Al2O3 Layer on the Optical and Mechanical Properties of MgAl2O4/Al2O3 Laminated Transparent Composite

Simplified Single‐Step Fabrication of Composite Transparent Ceramics

Contact Info

Product

Resources

About

Photoluminescence of rare‐earth/transition metal‐doped transparent/translucent polycrystalline Al₂O₃ ceramics: A review

Photoluminescence of rare‐earth/transition metal‐doped transparent/translucent polycrystalline Al₂O₃ ceramics: A review

Thickness Effect of (0001) Textured Al₂O₃ Layer on the Optical and Mechanical Properties of MgAl₂O₄/Al₂O₃ Laminated Transparent Composite