Synthesis, properties and phase transitions of pyrochlore- and fluorite-like Ln2RMO7 (Ln=Sm, Ho; R=Lu, Sc; M=Nb, Ta)

Shlyakhtina, A.V.; Белов, Д. А.; Pigalskiy, K. S.; Щеголихин, А. Н.; Колбанев, И. В.; Karyagina, O. K.

doi:10.1016/j.materresbull.2013.10.004

Cited by 22 publications

(11 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to X‐ray data, the obtained Sm 2 ScTaO 7 crystallizes in space group Fd‐3m with a = 10.4806(1)Å and V = 1151.22(2)Å 3 are in good agreement with the crystallographic parameters published earlier for this compound …”

Section: Resultssupporting

confidence: 87%

“…Synthesis of Sm 2 ScTaO 7 samples was performed according to the method used previously . The phase identification and structural characterization of Sm 2 ScTaO 7 were carried out by X‐ray powder diffraction (XRD).…”

Section: Methodsmentioning

confidence: 99%

“…According to literature data, the most common method for producing rare‐earth tantalates is solid‐state reaction . It is noted in that in order to obtain single‐phase and well‐crystallized tantalates, prolonged annealing at temperatures above 1200°C is required.…”

Section: Introductionmentioning

confidence: 99%

“…Thermomechanical properties, electrical conductivity, and dielectric constant of Sm 2 ScTaO 7 pyrochlore were studied recently, and anomalies were discovered for these properties in the temperature range of 600°C‐800°C. Based on the obtained results, the authors suggested that these anomalies in the properties of Sm 2 ScTaO 7 were associated with the first‐order phase transition.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Thermal expansion and heat capacity of Sm₂ScTaO₇ – A promising material for thermal barrier coatings

et al. 2019

View full text Add to dashboard Cite

The experimental results presented for Sm 2 ScTaO 7 pyrochlore in this study, temperature dependence of heat capacity and retaining the pyrochlore structure with the temperature variation, as well as the constant value of the thermal expansion coefficient in a wide temperature range, can be considered as evidences for the absence of a previously reported phase transition in the high-temperature region for this compound. This means that Sm 2 ScTaO 7 pyrochlore is no doubt a promising material for thermal barrier coatings. K E Y W O R D S3+/5+ pyrochlores, phase transition, thermal barrier coatings (TBC), thermal expansion, X-ray methods 4416 | GAVRICHEV Et Al.

show abstract

Section: Resultssupporting

confidence: 87%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal expansion and heat capacity of Sm₂ScTaO₇ – A promising material for thermal barrier coatings

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Following the technology presented in Ref. the samples were prepared via reverse precipitation by adding titrated rare‐earth chloride solutions and an ethanolic NbCl 5 solution to aqueous ammonia. The starting chemicals were Sm 2 O 3 , TiO 2 , and NbCl 5 powders dissolved in hydrochloric acid.…”

Section: Methodsmentioning

confidence: 99%

Rare‐earth and Nb doping of TiO₂ nanocrystalline mesoscopic layers for high‐efficiency dye‐sensitized solar cells

Козлов

Nikolskaia

Larina

et al. 2016

Physica Status Solidi (a)

View full text Add to dashboard Cite

The improvement of dye‐sensitized solar cells (DSSCs) performance can be realized by using rare‐earth and Nb‐doped TiO2 mesoporous photoelectrodes. The undoped, Nb‐doped, and rare‐earth‐doped TiO2 mesoscopic layers were prepared using a sol–gel method followed by a hydrothermal treatment. The Nb content was varied from 0.7 to 2.7 mol.%. The samples of complex rare‐earth titanium oxides with fluorite‐like structure containing Nb were synthesized using mechanical activation method. A series of fluorite‐like Sm2[TixNb1–x]2O7 compounds with varied Nb content was synthesized. The structure and morphology of obtained materials were characterized using XRD, SEM, and optical absorption spectroscopy. The prepared TiO2 mesoscopic layers were used for fabrication DSSCs. We have found that the photovoltaic parameters of DSSCs based on TiO2 sensitized with N719 dye, are closely related to the electronic structure of the Nb‐doped TiO2 electrodes. The changes of short circuit current of DSSCs were explained in relation to the electronic structure of the TiO2 electrodes. We have shown that the Nb doping enhances the junctions between neighboring nanoparticles and decreases the bulk electrical resistivity of the TiO2 electrodes. For the TiO2 electrodes doped with Nb the best DSSC performance with the energy conversion efficiency of 9.7% was obtained for Ti0.983Nb0.017O2 compound with 1.7 mol.% of Nb. Thus we have improved the device efficiency by 9% in comparison with the DSSC based on undoped TiO2 electrode. The developed rare‐earth doped compounds SmTiNbO were also used for fabrication and characterization of DSSCs. However, unlike Nb‐doped TiO2 layers, the efficiencies of DSSCs based on Nb‐doped complex rare‐earth titanium oxides were low in comparison with undoped TiO2.

show abstract

Thermal conductivity and expansion coefficient of Ln2LaTaO7 (Ln=Er and Yb) oxides for thermal barrier coating applications

Chen

Tang

Zhang

et al. 2016

Ceramics International

View full text Add to dashboard Cite

Synthesis, properties and phase transitions of pyrochlore- and fluorite-like Ln2RMO7 (Ln=Sm, Ho; R=Lu, Sc; M=Nb, Ta)

Cited by 22 publications

References 15 publications

Thermal expansion and heat capacity of Sm₂ScTaO₇ – A promising material for thermal barrier coatings

Thermal expansion and heat capacity of Sm₂ScTaO₇ – A promising material for thermal barrier coatings

Rare‐earth and Nb doping of TiO₂ nanocrystalline mesoscopic layers for high‐efficiency dye‐sensitized solar cells

Thermal conductivity and expansion coefficient of Ln2LaTaO7 (Ln=Er and Yb) oxides for thermal barrier coating applications

Contact Info

Product

Resources

About

Synthesis, properties and phase transitions of pyrochlore- and fluorite-like Ln2RMO7 (Ln=Sm, Ho; R=Lu, Sc; M=Nb, Ta)

Cited by 22 publications

References 15 publications

Thermal expansion and heat capacity of Sm2ScTaO7 – A promising material for thermal barrier coatings

Thermal expansion and heat capacity of Sm2ScTaO7 – A promising material for thermal barrier coatings

Rare‐earth and Nb doping of TiO2 nanocrystalline mesoscopic layers for high‐efficiency dye‐sensitized solar cells

Thermal conductivity and expansion coefficient of Ln2LaTaO7 (Ln=Er and Yb) oxides for thermal barrier coating applications

Contact Info

Product

Resources

About

Thermal expansion and heat capacity of Sm₂ScTaO₇ – A promising material for thermal barrier coatings

Thermal expansion and heat capacity of Sm₂ScTaO₇ – A promising material for thermal barrier coatings

Rare‐earth and Nb doping of TiO₂ nanocrystalline mesoscopic layers for high‐efficiency dye‐sensitized solar cells