Highly transparent Yb-doped (LaxY1−x)2O3 ceramics prepared through colloidal methods of nanoparticles compaction

Иванов, М. Г.; Калинина, Е. Г.; Kopylov, Yu. L.; Kravchenko, V. B.; Krutikova, I. V.; Kynast, Ulrich; Li, Jiang; Leznina, M.; Medvedev, A. I.

doi:10.1016/j.jeurceramsoc.2016.06.013

Cited by 25 publications

(11 citation statements)

References 44 publications

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“…The vibration band at 1414 cm −1 (x = 0.06, 0.10 and 0.14) is due to the present of carboxylate anions in the acid. The narrow peak at about 1384 cm −1 was attributed to NO 3 ‐ symmetric stretching mode 34 . The peaks at about 1218 cm −1 , 1128 cm −1 , and 1070 cm −1 are associated with C‐OH bending, C‐O‐C stretching and CO 3 2− symmetric stretching modes, respectively.…”

Section: Resultsmentioning

confidence: 96%

“…The narrow peak at about 1384 cm −1 was attributed to NO 3 symmetric stretching mode. 34 The peaks at about 1218 cm −1 , 1128 cm −1 , and 1070 cm −1 are associated with C-OH bending, C-O-C stretching and CO 3 2− symmetric stretching modes, respectively. Besides, other peaks at about 996 cm −1 and 667 cm −1 are associated with the out of plane bending of CO 3 2− vibrations.…”

Section: Ftir Studiesmentioning

confidence: 98%

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Structural, morphological, and opto‐electrical properties of Y_2‐xYb_xO₃nanoparticles synthesized using co‐precipitation method

Kumar

Tripathi

Sharma

et al. 2020

Int J Applied Ceramic Tech

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Ceramics are inorganic materials which are mostly crystalline oxides. The crystallinity of the ceramics differs from highly oriented crystalline to a semi-crystalline structure. Due to its varying crystallinity and electron composition in the ionic as well as covalent bonds the ceramics are able to exhibit different thermal, structural, optical, and electrical properties. Polycrystalline ceramics are used for various applications such as solid-state lasers, light-emitting diodes, infrared detectors, temperature sensors, solar cells. The precise dopant concentration in ceramics with rare-earth elements makes ceramics useful for luminescent and high-temperature applications such as lasing action and medical display devices. 1,2 Y 2 O 3 is considered the most important multifunctional material due to its potential application prospects. Y 2 O 3 has

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Section: Resultsmentioning

confidence: 96%

Section: Ftir Studiesmentioning

confidence: 98%

Structural, morphological, and opto‐electrical properties of Y_2‐xYb_xO₃nanoparticles synthesized using co‐precipitation method

Kumar

Tripathi

Sharma

et al. 2020

Int J Applied Ceramic Tech

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“…( 34) is limited by the condition of a small particle charge: v AE i Ψ ≪ 25 mV, where v AE i is a valence of ions in the solution. This condition is often not satisfied for real suspensions [38,39,40,41]. However, according to the analysis performed in [32], violation of this condition weakly affects the spatial distribution of the potential, which indicates a rather wide range of applicability of the relations (34).…”

Section: Numerical Simulation Techniquementioning

confidence: 99%

Effect of nanoparticle concentration on coagulation rate of colloidal suspensions

Boltachev

Ivanov

2020

Heliyon

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Theoretically and with the help of numerical simulation the coagulation rate of nanoparticle suspensions is analyzed. Analytical expressions are proposed that describes the rate of stationary coagulation of the nanoparticles suspended in a solvent (dn a =dt, where n a is the particle concentration) and the characteristic coagulation time θ ¼ À n a =ðdn a =dtÞ. In the contrast to traditionally used equations, the proposed expressions allow one to describe with high accuracy the rate of stationary coagulation of not only low concentrated suspensions, where the volume content of nanoparticles is ρ ≪ 1 %, but also rather highly concentrated ones, at ρ $ 1 % and more (ρ ¼ n a v a where v a is a particle volume), which are relevant for most of the industrial applications. Analytical expressions are written for both three-dimensional geometry, which is relevant for real colloids, and twodimensional geometry, which is useful to compare results of the analytical solution and numerical simulation. Computer experiments are performed in the framework of the two-dimensional method of stochastic dynamics. Satisfactory agreement of the obtained analytical expressions with the results of numerical calculations is demonstrated. The dependences of the coagulation time on the height of the interparticle energy barrier and on the suspension concentration are analyzed. It is shown that, in contrast to the obtained theoretical expressions, the traditionally used formulas overestimate the characteristic coagulation time for highly concentrated suspensions by more than an order of magnitude.

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“…The nano-size requirement is due to the high activity of such powders needed to sinter fully dense ceramics. The low agglomeration is immensely important for uniform packing of the nanoparticles in a green body since the particles agglomerates lead to the appearance of pores in the ceramics upon sintering, which is exceedingly harmful to the optical quality due to light scattering [14].…”

Section: Introductionmentioning

confidence: 99%

“…Comparing to a commonly used co-precipitation technique [20], the SHS allows obtaining weakly agglomerated nanopowders within one stage (there's no need for washing, drying, etc.). Besides, in comparison with other techniques, such as laser synthesis, for instance [9, 14, 21, 22, 23, 24], the method gives a chance to get a chemical composition of the synthesized powders with a sufficient accuracy [19]. Another important issue in the fabrication of the optical ceramics is the type and concentration of sintering aids, which helps the material to form the desired faultless microstructure [25].…”

Section: Introductionmentioning

confidence: 99%

Self-propagating high-temperature synthesis of (Ho1-xLax)2O3 nanopowders for magneto-optical ceramics

Балабанов

Filofeev

Ivanov

et al. 2019

Heliyon

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Weakly agglomerated nanoparticles of (Ho 1-x La x ) 2 O 3 solid solutions were synthesized with the help of a self-propagating high-temperature synthesis (SHS). The nanopowders were studied by a simultaneous thermal analysis (TG-DSC), X-ray diffraction (XRD), BET and FT-IR spectroscopy methods. Changes of the particles morphology after annealing at different temperatures and ball milling were investigated by a scanning electron microscopy (SEM) and a dynamic light scattering (DLS) method. It was found that annealing at a temperature of 900 °C in air and ball milling of the SHS nanopowders allow obtaining rounded shape particles with a mean diameter of about 20 nm and C-type cubic crystal structure. Up to 10 mol.% of the lanthana was shown to dissolve in the holmium oxide nanoparticles.

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Highly transparent Yb-doped (LaxY1−x)2O3 ceramics prepared through colloidal methods of nanoparticles compaction

Cited by 25 publications

References 44 publications

Structural, morphological, and opto‐electrical properties of Y_2‐xYb_xO₃nanoparticles synthesized using co‐precipitation method

Structural, morphological, and opto‐electrical properties of Y_2‐xYb_xO₃nanoparticles synthesized using co‐precipitation method

Effect of nanoparticle concentration on coagulation rate of colloidal suspensions

Self-propagating high-temperature synthesis of (Ho1-xLax)2O3 nanopowders for magneto-optical ceramics

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Highly transparent Yb-doped (LaxY1−x)2O3 ceramics prepared through colloidal methods of nanoparticles compaction

Cited by 25 publications

References 44 publications

Structural, morphological, and opto‐electrical properties of Y2‐xYbxO3nanoparticles synthesized using co‐precipitation method

Structural, morphological, and opto‐electrical properties of Y2‐xYbxO3nanoparticles synthesized using co‐precipitation method

Effect of nanoparticle concentration on coagulation rate of colloidal suspensions

Self-propagating high-temperature synthesis of (Ho1-xLax)2O3 nanopowders for magneto-optical ceramics

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Product

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Structural, morphological, and opto‐electrical properties of Y_2‐xYb_xO₃nanoparticles synthesized using co‐precipitation method

Structural, morphological, and opto‐electrical properties of Y_2‐xYb_xO₃nanoparticles synthesized using co‐precipitation method