Viscosity of the Molten Mixtures FLiNaK-LnF3 (Ln = La, Ce, Nd).
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| Title: | Viscosity of the Molten Mixtures FLiNaK-LnF |
|---|---|
| Authors: | Tkacheva, O.1 (AUTHOR) o.tkacheva@ihte.ru, Rudenko, A.1 (AUTHOR) |
| Source: | International Journal of Thermophysics. Dec2025, Vol. 46 Issue 12, p1-15. 15p. |
| Subjects: | Viscosity, Viscometry, Ionic solutions, Rheology, Rare earth metals, Fused salts |
| Abstract: | Molten salt eutectic FLiNaK containing lanthanide fluorides (LnF3) is widely used in various industrial applications and research projects, so knowledge of the physicochemical properties of such complex ionic melts is crucial. The dynamic viscosity of the FLiNaK-LnF3 (Ln = La, Ce, Nd) molten salt mixtures with content of LnF3 3, 7 and 15 mol% was studied by rotational viscometry using rheometer FRS 1600 (Anton Paar). Viscosity measurements were carried out in the temperature range from 1023 K to a temperature close to the liquidus of each composition. The viscosity of the FLiNaK-LnF3 melts increases significantly both with decreasing temperature and with increasing LnF3 content. The viscosity values of molten mixtures with the same content of LaF3, NdF3 or CeF3 do not differ insignificantly. However, a tendency for a more substantial decrease in viscosity is observed when introducing the LnF3 additives in the sequence CeF3 > NdF3 > LaF3. This tendency is violated for the dependence of viscosity on the superheating temperature (20, 100, 200 degrees above the liquidus): the viscosity of molten mixtures with any lanthanide fluoride in an amount greater than 7 mol% does not change. For the FLiNaK-NdF3 melts, the dependence of the fluidity on the molar volume was determined using the available data on the density of these melts. The fluidity of the FLiNaK-NdF3 decreases with increasing NdF3 concentration. However, when comparing the fluidity values versus the relative molar volume, it turns out that it stops changing in melts with an NdF3 content of more than 7 mol%. Such a change in the viscosity and fluidity of FLiNaK-LnF3 melts is explained by their complex ionic structure. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Thermophysics 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 |
| FullText | Text: Availability: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Viscosity of the Molten Mixtures FLiNaK-LnF<subscript>3</subscript> (Ln = La, Ce, Nd). – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Tkacheva%2C+O%2E%22">Tkacheva, O.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> o.tkacheva@ihte.ru</i><br /><searchLink fieldCode="AR" term="%22Rudenko%2C+A%2E%22">Rudenko, A.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Thermophysics%22">International Journal of Thermophysics</searchLink>. Dec2025, Vol. 46 Issue 12, p1-15. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Viscosity%22">Viscosity</searchLink><br /><searchLink fieldCode="DE" term="%22Viscometry%22">Viscometry</searchLink><br /><searchLink fieldCode="DE" term="%22Ionic+solutions%22">Ionic solutions</searchLink><br /><searchLink fieldCode="DE" term="%22Rheology%22">Rheology</searchLink><br /><searchLink fieldCode="DE" term="%22Rare+earth+metals%22">Rare earth metals</searchLink><br /><searchLink fieldCode="DE" term="%22Fused+salts%22">Fused salts</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Molten salt eutectic FLiNaK containing lanthanide fluorides (LnF3) is widely used in various industrial applications and research projects, so knowledge of the physicochemical properties of such complex ionic melts is crucial. The dynamic viscosity of the FLiNaK-LnF3 (Ln = La, Ce, Nd) molten salt mixtures with content of LnF3 3, 7 and 15 mol% was studied by rotational viscometry using rheometer FRS 1600 (Anton Paar). Viscosity measurements were carried out in the temperature range from 1023 K to a temperature close to the liquidus of each composition. The viscosity of the FLiNaK-LnF3 melts increases significantly both with decreasing temperature and with increasing LnF3 content. The viscosity values of molten mixtures with the same content of LaF3, NdF3 or CeF3 do not differ insignificantly. However, a tendency for a more substantial decrease in viscosity is observed when introducing the LnF3 additives in the sequence CeF3 > NdF3 > LaF3. This tendency is violated for the dependence of viscosity on the superheating temperature (20, 100, 200 degrees above the liquidus): the viscosity of molten mixtures with any lanthanide fluoride in an amount greater than 7 mol% does not change. For the FLiNaK-NdF3 melts, the dependence of the fluidity on the molar volume was determined using the available data on the density of these melts. The fluidity of the FLiNaK-NdF3 decreases with increasing NdF3 concentration. However, when comparing the fluidity values versus the relative molar volume, it turns out that it stops changing in melts with an NdF3 content of more than 7 mol%. Such a change in the viscosity and fluidity of FLiNaK-LnF3 melts is explained by their complex ionic structure. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Thermophysics 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: 10.1007/s10765-025-03658-7 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 1 Subjects: – SubjectFull: Viscosity Type: general – SubjectFull: Viscometry Type: general – SubjectFull: Ionic solutions Type: general – SubjectFull: Rheology Type: general – SubjectFull: Rare earth metals Type: general – SubjectFull: Fused salts Type: general Titles: – TitleFull: Viscosity of the Molten Mixtures FLiNaK-LnF3 (Ln = La, Ce, Nd). Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Tkacheva, O. – PersonEntity: Name: NameFull: Rudenko, A. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 0195928X Numbering: – Type: volume Value: 46 – Type: issue Value: 12 Titles: – TitleFull: International Journal of Thermophysics Type: main |
| ResultId | 1 |
