Optically Transparent Ceramic (Review)

Kachaev, A. A.; Гращенков, Д. В.; Lebedeva, Yu. E.; Solntsev, S. S.; Хасанов, О. Л.

doi:10.1007/s10717-016-9838-3

Cited by 26 publications

(11 citation statements)

References 28 publications

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“…The most common methods used to produce transparent MAS ceramics are hot pressing or slip casting, followed by sintering and hot isostatic pressing (HIP). [5,6] However, these methods only allow the production of simple geometries such as plates or domes. For the production of complex structured components, the ceramics require additional postprocessing by grinding, polishing or etching.…”

Section: Introductionmentioning

confidence: 99%

High-resolution structuring of transparent spinel ceramics

Prediger,

Mader,

Schell

et al. 2024

Microfluidics, BioMEMS, and Medical Microsystems XXII

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Transparent ceramics such as magnesium aluminate spinel (MAS) are an outstanding class of materials that combine high optical transparency with remarkable mechanical, chemical and thermal strength. They are particularly interesting for micro-optical applications, since MAS offers a high refractive index in combination with a low optical dispersion, which is inaccessible for other materials including glasses and polymers. However transparent polycrystalline MAS is notoriously difficult to microstructure. Methods such as hot pressing or slip casting only allow simple geometries like plates or domes to be manufactured. More complex geometries require time-consuming and cost-intensive postprocessing. We have therefore developed a thermoplastic nanocomposite that can be structured with high accuracy by injection molding. The nanocomposite can subsequently be transformed into a transparent polycrystalline MAS ceramic with a transparency close to the theoretical maximum by thermal debinding, sintering and hot isostatic pressing (HIP). This innovative process makes transparent ceramics for optics and photonics available at low cost and with high production rates.

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Section: Introductionmentioning

confidence: 99%

High-resolution structuring of transparent spinel ceramics

Prediger,

Mader,

Schell

et al. 2024

Microfluidics, BioMEMS, and Medical Microsystems XXII

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“…The yellow YAG:Ce combined with a blue LED or the bule/red/green phosphors combined with an ultraviolet LED both yield energy‐efficient white light . Along with the advances in particle synthesis and sintering technique, sinterable powders with an isotropic cubic structure can be densified into fully transparent bodies for potential applications in various optical and mechanical systems …”

Section: Introductionmentioning

confidence: 99%

“…output, low radiation damage, a short afterglow, a high luminescence efficiency, and an emission wavelength peak in the 500-900 nm range. 9,10 As the relationship among absorption coefficient (η abs ), theoretical density (ρ), and effective atomic number (Z eff ) can be expressed as: η abs = ρZ eff 4 , an effective scintillator should have a high density and a large effective atomic number. 11 Even though a transparent YAG:Ce ceramic nearly possesses all of the above properties, X-ray absorption is generally low because of the relatively low ρ of 4.56 g/cm 3 and the small Z eff of 32.6.…”

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confidence: 99%

Production and optical properties of Ce³⁺‐activated and Lu³⁺‐stabilized transparent gadolinium aluminate garnet ceramics

2019

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We first report the novel Ce3+‐activated and Lu3+‐stabilized gadolinium aluminate garnet (GAG) transparent ceramics derived from their precipitation precursors via a facile co‐precipitation strategy using ammonium hydrogen carbonate (AHC) as the precipitant. The resulting precursors in liquid phase were substantially homogeneous solid solutions and could directly convert into sinterable garnet powders via pyrolysis. Substituting 35 at.% of Lu3+ for Gd3+ was effective to stabilize the cubic GAG garnet structure and transparent (Gd,Lu)3Al5O12:Ce ceramics were successfully fabricated by vacuum sintering at 1715°C. The ceramic transparency was improved by optimizing the particle processing conditions and the best sample had an in‐line transmittance of ~70% at 580 nm (Ce3+ emission center) and over 80% in partial infrared region with a fine average grain size of ~4.5 μm. Transparent (Gd,Lu)3Al5O12:Ce ceramics have a short critical wavelength (<200 nm) and a maximal infrared cut‐off at ~6.6 μm. Both the (Gd,Lu)3Al5O12:Ce phosphor powder and the transparent ceramic exhibited characteristic yellow emission of Ce3+ with strong broad emission bands from 490 to 750 nm upon UV excitation into two groups of broad bands around 340 and 470 nm. The photoluminescence and photoluminescence excitation intensities as well as the quantum yield were greatly enhanced via high‐temperature densification. Both the phosphor powder and ceramic bulk had short effective fluorescence lifetimes.

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“…Solid solutions having a garnet structure doped by rare‐earth ions (Re) are promising materials for use in solid‐state lasers, luminescent, and magneto‐optical devices . In particular, ytterbium‐doped YAG has tremendous potential as a gain medium for high‐power and femtosecond pulse lasers .…”

Section: Introductionmentioning

confidence: 99%

Estimation of Sc³⁺ solubility in dodecahedral and octahedral sites in YSAG:Yb

et al. 2019

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A method for synthesizing YSAG:Yb optical ceramics has been developed. Additionally, the phase composition and unit cell parameters for YSAG, YbSAG, and their solid solutions have been determined. The limits of scandium solubility in the dodecahedral and octahedral sites of garnet crystal lattice have been estimated after annealing at 1600°C. The scandium solubility limit in the dodecahedral sites of YSAG:Yb was found to be 66 ± 2 at.%. The limit of scandium solubility in octahedral sites depended upon the type of garnet-forming cations. The solubility limit for Sc 3+ decreased from 97.5 ± 0.5 to 68.5 ± 1 at.% with simultaneous increase of ytterbium content in the YSAG-YbSAG system. Therefore, the region of solid solutions existing with a garnet structure in the Al 2 O 3 -Sc 2 O 3 -Yb 2 O 3 -Y 2 O 3 system was determined. Samples having scandium in both dodecahedral and octahedral sites, which had a Sc 3+ content of~30 at.%, were synthesized as a precursor for optical ceramic production.

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Optically Transparent Ceramic (Review)

Cited by 26 publications

References 28 publications

High-resolution structuring of transparent spinel ceramics

High-resolution structuring of transparent spinel ceramics

Production and optical properties of Ce³⁺‐activated and Lu³⁺‐stabilized transparent gadolinium aluminate garnet ceramics

Estimation of Sc³⁺ solubility in dodecahedral and octahedral sites in YSAG:Yb

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Optically Transparent Ceramic (Review)

Cited by 26 publications

References 28 publications

High-resolution structuring of transparent spinel ceramics

High-resolution structuring of transparent spinel ceramics

Production and optical properties of Ce3+‐activated and Lu3+‐stabilized transparent gadolinium aluminate garnet ceramics

Estimation of Sc3+ solubility in dodecahedral and octahedral sites in YSAG:Yb

Contact Info

Product

Resources

About

Production and optical properties of Ce³⁺‐activated and Lu³⁺‐stabilized transparent gadolinium aluminate garnet ceramics

Estimation of Sc³⁺ solubility in dodecahedral and octahedral sites in YSAG:Yb