Structural and transport properties of neodymium tungstates prepared via mechanochemical activation

Y. Bespalko; N. Eremeev; P. Skryabin; T. Krieger; Y. Chesalov; O. Lapina; D. Khabibulin; A. Ulihin; N. Uvarov; V. Sadykov

doi:10.1016/j.ceramint.2018.09.277

Structural and transport properties of neodymium tungstates prepared via mechanochemical activation

Y. Bespalko, N. Eremeev, P. Skryabin, T. Krieger, Y. Chesalov, O. Lapina, D. Khabibulin, A. Ulihin, N. Uvarov, V. Sadykov

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

2 Цитирования (Scopus)

Аннотация

Nd_5.5WO_11.25-δ, (Nd_5/6La_1/6)_5.5WO_11.25-δ and Nd_5.5W_0.5Mo_0.5O_11.25-δ mixed oxides have been prepared using mechanochemical activation (MA) of Nd₂O₃-WO₃, Nd₂O₃-La₂O₃-WO₃, Nd₂O₃-MoO₃-WO₃ mixtures in a high-power planetary ball mill. Genesis of these tungstates structural properties was studied by XRD, SEM, TEM with EDX analysis, ¹H NMR, IR and Raman spectroscopy. X-ray diffraction has revealed that MA results in formation of a pure fluorite structure already after milling. High-density ceramic pellets have been obtained after sintering at 1350 °C. Transport properties of Nd_5.5WO_11.25-δ mixed oxide were improved by the partial substitution of Nd with La in (Nd_5/6La_1/6)_5.5WO_11.25-δ and W with Mo in Nd_5.5W_0.5Mo_0.5O_11.25-δ samples. For all samples the electrical conductivity values measured in a humid atmosphere (up to ~ 10⁻³ S/cm at 550 °C) exceed those measured in a dry atmosphere indicating the proton character of conductivity.

Язык оригинала	английский
Страницы (с-по)	9529-9536
Число страниц	8
Журнал	Ceramics International
Том	45
Номер выпуска	7
DOI	https://doi.org/10.1016/j.ceramint.2018.09.277
Состояние	Опубликовано - 1 мая 2019

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10.1016/j.ceramint.2018.09.277

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title = "Structural and transport properties of neodymium tungstates prepared via mechanochemical activation",

abstract = "Nd5.5WO11.25-δ, (Nd5/6La1/6)5.5WO11.25-δ and Nd5.5W0.5Mo0.5O11.25-δ mixed oxides have been prepared using mechanochemical activation (MA) of Nd2O3-WO3, Nd2O3-La2O3-WO3, Nd2O3-MoO3-WO3 mixtures in a high-power planetary ball mill. Genesis of these tungstates structural properties was studied by XRD, SEM, TEM with EDX analysis, 1H NMR, IR and Raman spectroscopy. X-ray diffraction has revealed that MA results in formation of a pure fluorite structure already after milling. High-density ceramic pellets have been obtained after sintering at 1350 °C. Transport properties of Nd5.5WO11.25-δ mixed oxide were improved by the partial substitution of Nd with La in (Nd5/6La1/6)5.5WO11.25-δ and W with Mo in Nd5.5W0.5Mo0.5O11.25-δ samples. For all samples the electrical conductivity values measured in a humid atmosphere (up to ~ 10−3 S/cm at 550 °C) exceed those measured in a dry atmosphere indicating the proton character of conductivity.",

keywords = "Proton transport, Structure, Synthesis by mechanical activation, Tungstate, STABILITY, LANTHANUM TUNGSTATE, HYDROGEN PERMEATION, SEPARATION",

author = "Y. Bespalko and N. Eremeev and P. Skryabin and T. Krieger and Y. Chesalov and O. Lapina and D. Khabibulin and A. Ulihin and N. Uvarov and V. Sadykov",

year = "2019",

month = may,

day = "1",

doi = "10.1016/j.ceramint.2018.09.277",

language = "English",

volume = "45",

pages = "9529--9536",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier",

number = "7",

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Structural and transport properties of neodymium tungstates prepared via mechanochemical activation. / Bespalko, Y.; Eremeev, N.; Skryabin, P. и др.

В: Ceramics International, Том 45, № 7, 01.05.2019, стр. 9529-9536.

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

TY - JOUR

T1 - Structural and transport properties of neodymium tungstates prepared via mechanochemical activation

AU - Bespalko, Y.

AU - Eremeev, N.

AU - Skryabin, P.

AU - Krieger, T.

AU - Chesalov, Y.

AU - Lapina, O.

AU - Khabibulin, D.

AU - Ulihin, A.

AU - Uvarov, N.

AU - Sadykov, V.

PY - 2019/5/1

Y1 - 2019/5/1

N2 - Nd5.5WO11.25-δ, (Nd5/6La1/6)5.5WO11.25-δ and Nd5.5W0.5Mo0.5O11.25-δ mixed oxides have been prepared using mechanochemical activation (MA) of Nd2O3-WO3, Nd2O3-La2O3-WO3, Nd2O3-MoO3-WO3 mixtures in a high-power planetary ball mill. Genesis of these tungstates structural properties was studied by XRD, SEM, TEM with EDX analysis, 1H NMR, IR and Raman spectroscopy. X-ray diffraction has revealed that MA results in formation of a pure fluorite structure already after milling. High-density ceramic pellets have been obtained after sintering at 1350 °C. Transport properties of Nd5.5WO11.25-δ mixed oxide were improved by the partial substitution of Nd with La in (Nd5/6La1/6)5.5WO11.25-δ and W with Mo in Nd5.5W0.5Mo0.5O11.25-δ samples. For all samples the electrical conductivity values measured in a humid atmosphere (up to ~ 10−3 S/cm at 550 °C) exceed those measured in a dry atmosphere indicating the proton character of conductivity.

AB - Nd5.5WO11.25-δ, (Nd5/6La1/6)5.5WO11.25-δ and Nd5.5W0.5Mo0.5O11.25-δ mixed oxides have been prepared using mechanochemical activation (MA) of Nd2O3-WO3, Nd2O3-La2O3-WO3, Nd2O3-MoO3-WO3 mixtures in a high-power planetary ball mill. Genesis of these tungstates structural properties was studied by XRD, SEM, TEM with EDX analysis, 1H NMR, IR and Raman spectroscopy. X-ray diffraction has revealed that MA results in formation of a pure fluorite structure already after milling. High-density ceramic pellets have been obtained after sintering at 1350 °C. Transport properties of Nd5.5WO11.25-δ mixed oxide were improved by the partial substitution of Nd with La in (Nd5/6La1/6)5.5WO11.25-δ and W with Mo in Nd5.5W0.5Mo0.5O11.25-δ samples. For all samples the electrical conductivity values measured in a humid atmosphere (up to ~ 10−3 S/cm at 550 °C) exceed those measured in a dry atmosphere indicating the proton character of conductivity.

KW - Proton transport

KW - Structure

KW - Synthesis by mechanical activation

KW - Tungstate

KW - STABILITY

KW - LANTHANUM TUNGSTATE

KW - HYDROGEN PERMEATION

KW - SEPARATION

UR - http://www.scopus.com/inward/record.url?scp=85054523703&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2018.09.277

DO - 10.1016/j.ceramint.2018.09.277

M3 - Article

AN - SCOPUS:85054523703

VL - 45

SP - 9529

EP - 9536

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 7

ER -