Dense ceramics of lanthanide-doped Lu2O3 prepared by spark plasma sintering

Thoř, T.; Rubešová, K.; Jakeš, V.; Mikolášová, D.; Cajzl, Jakub; Havlíček, Jan; Nádherný, Ladislav; Průša, Filip; Kučerková, Romana; Nikl, M.

doi:10.1016/j.jeurceramsoc.2020.08.028

Cited by 11 publications

(4 citation statements)

References 30 publications

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“…Their diameter did not exceed 50 nm and their concentration was estimated to be 90 pores•µm −3 . These defects could be related to the presence of microstructural inhomogeneities in powder compacts before sintering and/or rapid grain growth [31]. In fact, it has been highlighted in a previous paper that grain growth starts to be significant for temperatures higher than 1300 °C in such ceramics during sintering by SPS, independently of the applied pressure [32].…”

Section: Sample Microstructure and Optical Transmittancementioning

confidence: 98%

Optical and Spectroscopic Properties of Ho:Lu2O3 Transparent Ceramics Elaborated by Spark Plasma Sintering

Viers,

Guené-Girard,

Dalla-Barba

et al. 2024

Ceramics

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In this work, transparent ceramics were manufactured from nanopowders synthesized by aqueous coprecipitation followed by Spark Plasma Sintering (SPS) to ensure rapid and full densification. The photoluminescence of Ho:Lu2O3 transparent ceramics was studied in the Visible and IR domains as a function of Ho3+ dopant level from 0.5 at.% to 10 at.%. A cross-relaxation mechanism was identified and favors the 2 μm emission. All of the obtained results indicate that the optical properties are very similar between Lu2−xHoxO3 transparent ceramics and single crystals. Thus, the SPS technique appears to be a very promising method to manufacture such ceramics, which could be used as amplifier media for high-energy solid-state lasers.

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Section: Sample Microstructure and Optical Transmittancementioning

confidence: 98%

Optical and Spectroscopic Properties of Ho:Lu2O3 Transparent Ceramics Elaborated by Spark Plasma Sintering

Viers,

Guené-Girard,

Dalla-Barba

et al. 2024

Ceramics

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“…Powder precursors with the composition of La 1-x-0.05 Y x Eu 0.05 AlO 3 (x = 0; 0.25; 0.45; 0.55; 0.65) were prepared by a reverse co-precipitation method -a process producing homogeneous precursors for the subsequent SPS of multi-component oxides [21]. The used starting compounds were lanthanum acetate hydrate (Strem Chemicals; 99.9 %), yttrium nitrate hexahydrate (Strem Chemicals; 99.9 %), aluminium nitrate nonahydrate (Lach-Ner; p.a.…”

Section: Experimental Sample Preparationmentioning

confidence: 99%

Eu-DOPED La1-xYxAlO₃: IMPACT Of Y/La RATIO ON OPTICAL PROPERTIES

Havlíček¹

2022

Ceramics - Silikaty

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YAlO 3 and LaAlO 3 are both important oxides used as matrices in optical applications. Their mutual solid solubility is kinetically dependent, especially in a polycrystalline form. In this work, we prepared La 1-x Y x AlO 3 (x = 0 -0.65) samples doped with 5 at. % of Eu 3+ in the A-site. The samples were prepared by Spark Plasma Sintering from powders synthetised by a reverse co-precipitation method. The single-phase samples were obtained up to a composition of La 0.7 Y 0.25 Eu 0.05 AlO 3 ; with a higher yttrium doping level, a mixture of Y-rich and La-rich perovskite-type phases was present. The La/Y substitution had an influence on a shift in the top of the valence band which influenced the excitation spectra. In photoluminescence and radioluminescence measurements, the Eu 3+ local site symmetry changes were manifested by the change in intensity and fine splitting of the 5 D 0 → 7 F J (J = 1, 2, 3, 4, 5) emission bands. The increasing content of Y 3+ caused a slight acceleration of the PL decay of the Eu 3+ photoluminescence and an increase in the integral intensity of radioluminescence spectra.

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“…Rare earth elements, because of their unique electronic layer structure, have excellent physical and chemical property properties, such as light, electricity and magnetism [1]. It is widely used in luminescent materials [2][3][4][5][6][7], magnetic materials [8,9], hydrogen storage materials [10], high performance ceramic materials [11][12][13], amorphous alloys [14], catalytic materials [15][16][17][18][19][20] and solid fuel cell electrolytes [21][22][23], which are indispensable core foundation material and have gained particular attention [24]. With the development of the application levels, the quality requirements for rare earth oxides have changed from simple chemical composition and purity to controllable crystal structure, particle size, morphology and specific surface area.…”

Section: Introductionmentioning

confidence: 99%

Study of the thermal stability and decomposition behaviour of Lu(NH ₄ )(C ₂ O ₄ ) ₂ ·2H ₂ O

Bao

Fang

Luo

et al. 2022

Micro & Nano Letters

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Lu(NH 4 )(C 2 O 4 ) 2 ⋅2H 2 O has been successfully fabricated by the improved oxalate precipitation method. Its thermal stability and decomposition behaviour were investigated by using scanning electron microscopy, thermalgravimetric-differantial scanning calorimetry and in situ high temperature X-ray diffraction measurements. Despite substantial removal of oxide, carbon, nitrogen, and hydrogen elements, the scanning electron microscopy images clearly revealed that the precursor calcined Lu 2 O 3 products maintained well the morphology properties of the precursor. Moreover, TG-DSC analysis demonstrated that the peak temperatures of the precursor to Lu 2 O 2 CO 3 and Lu 2 O 2 CO 3 to Lu 2 O 3 were 400 • C and 630 • C, respectively. Finally, and most importantly, the in situ XRD results exhibited that the 'Lu(NH 4 )(C 2 O 4 ) 2 ', 'Lu 2 O 2 CO 3 ' and 'Lu 2 O 3 ' crystal structures formed by heating the Lu (680∼980• C, respectively. The experimental results provided an interesting fact that Lu(NH 4 )(C 2 O 4 ) 2 ⋅H 2 O has been completely decomposed into cubic phase Lu 2 O 3 crystal at 680 • C, which is nearly 200 • C lower than that of lutetium oxalate tetrahydrate prepared by traditional oxalic acid precipitation process.

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Dense ceramics of lanthanide-doped Lu2O3 prepared by spark plasma sintering

Cited by 11 publications

References 30 publications

Optical and Spectroscopic Properties of Ho:Lu2O3 Transparent Ceramics Elaborated by Spark Plasma Sintering

Optical and Spectroscopic Properties of Ho:Lu2O3 Transparent Ceramics Elaborated by Spark Plasma Sintering

Eu-DOPED La1-xYxAlO₃: IMPACT Of Y/La RATIO ON OPTICAL PROPERTIES

Study of the thermal stability and decomposition behaviour of Lu(NH ₄ )(C ₂ O ₄ ) ₂ ·2H ₂ O

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Dense ceramics of lanthanide-doped Lu2O3 prepared by spark plasma sintering

Cited by 11 publications

References 30 publications

Optical and Spectroscopic Properties of Ho:Lu2O3 Transparent Ceramics Elaborated by Spark Plasma Sintering

Optical and Spectroscopic Properties of Ho:Lu2O3 Transparent Ceramics Elaborated by Spark Plasma Sintering

Eu-DOPED La1-xYxAlO₃: IMPACT Of Y/La RATIO ON OPTICAL PROPERTIES

Study of the thermal stability and decomposition behaviour of Lu(NH 4 )(C 2 O 4 ) 2 ·2H 2 O

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Product

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Study of the thermal stability and decomposition behaviour of Lu(NH ₄ )(C ₂ O ₄ ) ₂ ·2H ₂ O