Zobrazeno 1 - 10 of 126 pro vyhledávání: '"V. DaněK"'
3
Structure of the MF–AlF3–Al2O3(M = Li, Na, K) MELTS
Autor: T. Ostvold, V. DaněK, Ø.T. Gustavsen
Publikováno v: Canadian Metallurgical Quarterly. 39:153-162
Direct oxygen determination of MF–AlF3–Al2O3 (M = Li, Na, K) melts in dependence on cryolite ratio and alumina content was performed using the LECO TC-436 Nitrogen/Oxygen analyzer. On the basis of the obtained results the distribution of individu
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6239c24cbfe13ec455e9efd487f15d64
https://doi.org/10.1179/cmq.2000.39.2.153
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5
Mechanism and kinetics of niobium ion reduction in LiF–NaF–K2NbF7 melts
Autor: A Silný, V Van, V Daněk
Publikováno v: Electrochemistry Communications, Vol 1, Iss 8, Pp 354-359 (1999)
The mechanism and kinetics of niobium ion reduction in LiF–NaF–K2NbF7 melt were studied by cyclic voltammetry and chronopotentiometry. Two-step reversible diffusion-controlled mechanism in the melt at 750°C was found to be Nb(V)→Nb(IV)→Nb(0)
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98257a47e647c3a594d7de5f22ee3f0f
http://www.sciencedirect.com/science/article/pii/S1388248199000727
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6
Electrochemical study of niobium fluoride and oxyfluoride complexes in molten LiF–KF–K2NbF7 bath
Autor: V Daněk, V Van, J Hı́veš, A Silný
Publikováno v: Electrochemistry Communications, Vol 1, Iss 7, Pp 295-300 (1999)
The reduction of niobium in an equimolar molten mixture of LiF and KF has been investigated using a cyclic voltammetric technique. A two-step mechanism of reduction of niobium in LiF–KF melt is proposed. The influence of oxide ions on the reduction
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5ef66200262d638a6e84006a0a7b749
http://www.sciencedirect.com/science/article/pii/S1388248199000600
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7
Electrodeposition of titanium diboride from fused salts
Autor: M. Makyta, G. M. Haarberg, V. Daněk, Jomar Thonstad
Publikováno v: Journal of Applied Electrochemistry. 26:319-324
Electrodeposition of TiB2 has been performed in cryolite-based electrolytes at 960°C and in KF-KCl melts at 800°C. As electroactive species either boron oxide and titanium oxide or potassium tetrafluoroborate and potassium hexafluorotitanate were u
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::be156dff391699cb20379884fad873d2
https://doi.org/10.1007/bf00242102
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9
Surface tension of cryolite-based melts
Autor: T. Østvold, O. Patarák, V. Daněk
Publikováno v: Canadian Metallurgical Quarterly. 34:129-133
The pin detachment method has been used to obtain data on the surface tension of liquid Na3AlF6 with additions of AlF3, LiF, KF, CaF, and A12O3 as a function of temperature. In basic melts A12O3 and KF are surface active and decrease the surface tens
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::164a9745213ad8478a6edb1f0daf3b23
https://doi.org/10.1016/0008-4433(94)00027-h
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