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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

Publication de 4  numéros par an

ISSN Imprimer: 1093-3611

ISSN En ligne: 1940-4360

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00005 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.07 SJR: 0.198 SNIP: 0.48 CiteScore™:: 1.1 H-Index: 20

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The Influence of CaF2 and AIF3 upon Mechanism and Kinetics of the Anodic Reaction in Cryolite-Alumina Melts

Volume 3, Numéro 2-3, 1999, pp. 311-319
DOI: 10.1615/HighTempMatProc.v3.i2-3.150
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RÉSUMÉ

The anodic reaction on spectral pure graphite (SPG) was studied in the potential range from 1.2 V to 2.1 V versus an aluminium reference electrode in cryolite-alumina melts containing also CaF2 and AlF3 at 1000 °C by means of Electrochemical Impedance Spectroscopy (EIS). The experimentally recorded impedance spectra were interpreted in terms of an equivalent circuit approach and the kinetic theory of Bai and Conway. Using the values of the effective rate constants of the two charge transfer steps and the values of the Tafel constants, the role of the two additives: CaF2 and AlF3 is clarified. The addition of CaF2 and AlF3 to cryolite-alumina saturated melt, increases the overpotential of the anodic reaction by decreasing the value of the effective rate constant of the first step, and this decrease is much greater in case of AlF3. In the industrial type melt, the influence of the CaF2 seems to be prevailing above the influence of AlF3.

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