Effect of the Particle Size of the Components of CaWO4–Al2O3 Composites on Their Transport Properties.
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| Title: | Effect of the Particle Size of the Components of CaWO |
|---|---|
| Authors: | Guseva, A. F.1 (AUTHOR), Pestereva, N. N.1 (AUTHOR) Natalie.Pestereva@urfu.ru, Tushkova, A. A.1 (AUTHOR), Russkikh, O. V.1 (AUTHOR), Adamova, L. V.1 (AUTHOR) |
| Source: | Inorganic Materials. Aug2024, Vol. 60 Issue 8, p983-993. 11p. |
| Subjects: | Aluminum oxide, X-ray microanalysis, Differential scanning calorimetry, Lime (Minerals), Solid electrolytes |
| Abstract: | We have studied the effect of the grain size of aluminum oxide and calcium tungstate on the transport properties of (1 – x)СaWO4–xAl2O3 composites with a mole fraction of aluminum oxide x ≤ 0.35. The phase composition and thermodynamic stability of the composites were ascertained by X-ray diffraction, thermogravimetry, and differential scanning calorimetry. Their surface morphology was examined by electron microscopy and their elemental composition was determined by X-ray microanalysis. The electrical conductivity of the composites was determined by electrochemical impedance measurements and analyzed as a function of temperature, oxygen pressure in the gas phase, dispersoid (aluminum oxide) concentration, and the grain size of their components. The conductivity of the (1 – x)СaWO4–xAl2O3 composites containing 5–10 mol % aluminum oxide was found to exceed that of CaWO4 by more than one order of magnitude. Varying the average grain size of the Al2O3 nanopowder from 21 to 82 nm caused no appreciable changes in the conductivity of the composites, which was due to the polydispersity of the aluminum oxide, whereas reducing the average grain size of CaWO4 from 6.4 to 1.6 μm led to a twofold increase in the conductivity of the composites. [ABSTRACT FROM AUTHOR] |
| Copyright of Inorganic Materials is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 183752404 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Effect of the Particle Size of the Components of CaWO<subscript>4</subscript>–Al<subscript>2</subscript>O<subscript>3</subscript> Composites on Their Transport Properties. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Guseva%2C+A%2E+F%2E%22">Guseva, A. F.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pestereva%2C+N%2E+N%2E%22">Pestereva, N. N.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> Natalie.Pestereva@urfu.ru</i><br /><searchLink fieldCode="AR" term="%22Tushkova%2C+A%2E+A%2E%22">Tushkova, A. A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Russkikh%2C+O%2E+V%2E%22">Russkikh, O. V.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Adamova%2C+L%2E+V%2E%22">Adamova, L. V.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Inorganic+Materials%22">Inorganic Materials</searchLink>. Aug2024, Vol. 60 Issue 8, p983-993. 11p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Aluminum+oxide%22">Aluminum oxide</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+microanalysis%22">X-ray microanalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Differential+scanning+calorimetry%22">Differential scanning calorimetry</searchLink><br /><searchLink fieldCode="DE" term="%22Lime+%28Minerals%29%22">Lime (Minerals)</searchLink><br /><searchLink fieldCode="DE" term="%22Solid+electrolytes%22">Solid electrolytes</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: We have studied the effect of the grain size of aluminum oxide and calcium tungstate on the transport properties of (1 – x)СaWO4–xAl2O3 composites with a mole fraction of aluminum oxide x ≤ 0.35. The phase composition and thermodynamic stability of the composites were ascertained by X-ray diffraction, thermogravimetry, and differential scanning calorimetry. Their surface morphology was examined by electron microscopy and their elemental composition was determined by X-ray microanalysis. The electrical conductivity of the composites was determined by electrochemical impedance measurements and analyzed as a function of temperature, oxygen pressure in the gas phase, dispersoid (aluminum oxide) concentration, and the grain size of their components. The conductivity of the (1 – x)СaWO4–xAl2O3 composites containing 5–10 mol % aluminum oxide was found to exceed that of CaWO4 by more than one order of magnitude. Varying the average grain size of the Al2O3 nanopowder from 21 to 82 nm caused no appreciable changes in the conductivity of the composites, which was due to the polydispersity of the aluminum oxide, whereas reducing the average grain size of CaWO4 from 6.4 to 1.6 μm led to a twofold increase in the conductivity of the composites. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Inorganic Materials is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1134/S0020168524701218 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 11 StartPage: 983 Subjects: – SubjectFull: Aluminum oxide Type: general – SubjectFull: X-ray microanalysis Type: general – SubjectFull: Differential scanning calorimetry Type: general – SubjectFull: Lime (Minerals) Type: general – SubjectFull: Solid electrolytes Type: general Titles: – TitleFull: Effect of the Particle Size of the Components of CaWO4–Al2O3 Composites on Their Transport Properties. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Guseva, A. F. – PersonEntity: Name: NameFull: Pestereva, N. N. – PersonEntity: Name: NameFull: Tushkova, A. A. – PersonEntity: Name: NameFull: Russkikh, O. V. – PersonEntity: Name: NameFull: Adamova, L. V. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 08 Text: Aug2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 00201685 Numbering: – Type: volume Value: 60 – Type: issue Value: 8 Titles: – TitleFull: Inorganic Materials Type: main |
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