Structural and Transport Properties of Neodymium Tungstates Prepared via Mechanochemical Activation Full article
| Journal |
Ceramics International
ISSN: 0272-8842 |
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| Output data | Year: 2019, Volume: 45, Number: 7 (B), Pages: 9529-9536 Pages count : 8 DOI: 10.1016/j.ceramint.2018.09.277 | ||||||
| Tags | tungstate, synthesis by mechanical activation, structure, proton transport | ||||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Science Foundation | 16-13-00112 |
| 2 | Federal Agency for Scientific Organizations | 0303-2016-0013 |
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.
Cite:
Bespalko Y.
, Eremeev N.
, Skryabin P.
, Krieger T.
, Chesalov Y.
, Lapina O.
, Khabibulin D.
, Ulihin A.
, Uvarov N.
, Sadykov V.
Structural and Transport Properties of Neodymium Tungstates Prepared via Mechanochemical Activation
Ceramics International. 2019. V.45. N7 (B). P.9529-9536. DOI: 10.1016/j.ceramint.2018.09.277 WOS Scopus РИНЦ AN OpenAlex
Structural and Transport Properties of Neodymium Tungstates Prepared via Mechanochemical Activation
Ceramics International. 2019. V.45. N7 (B). P.9529-9536. DOI: 10.1016/j.ceramint.2018.09.277 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Jul 29, 2018 |
| Accepted: | Sep 28, 2018 |
| Published online: | Oct 1, 2018 |
| Published print: | May 1, 2019 |
Identifiers:
| Web of science: | WOS:000463688400030 |
| Scopus: | 2-s2.0-85054523703 |
| Elibrary: | 38619371 |
| Chemical Abstracts: | 2018:1865322 |
| OpenAlex: | W2895715635 |