University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Electrodeposition of niobium from fused electrolytes.

Dartnell, John. (1959) Electrodeposition of niobium from fused electrolytes. Doctoral thesis, University of Surrey (United Kingdom)..

[img]
Preview
Text
10802148.pdf
Available under License Creative Commons Attribution Non-commercial Share Alike.

Download (9MB) | Preview

Abstract

Apparatus has been developed for conducting electrodeposition experiments from fused electrolytes, under vacuum or an inert atmosphere. Procedures have been developed for the preparation of chloride electrolytes free from oxygen and extraneous impurities. Attempts have been made to prepare niobium chlorides in situ, but these have met with little success. Current - polarisation measurements have been made by means of a standard reference electrode. Coulometric measurements have shown that niobium dissolves anodically to give trivalent ions in solution at low current densities. These form a reversible electrode system with a niobium electrode. At higher current densities the niobium dissolves to give tetravalent ions in solution. These are in the form of complex anions, possibly NbCl[6][--], and can only be reduced by a secondary reaction involving alkali metal dissolved in the electrolyte. Approximate estimations of the free energies of formation of niobium chlorides have been made, and are in good agreement with recently published results.

Item Type: Thesis (Doctoral)
Divisions : Theses
Authors :
NameEmailORCID
Dartnell, John.
Date : 1959
Contributors :
ContributionNameEmailORCID
http://www.loc.gov/loc.terms/relators/THS
Additional Information : Thesis (Ph.D.)--University of Surrey (United Kingdom), 1959.
Depositing User : EPrints Services
Date Deposited : 22 Jun 2018 13:57
Last Modified : 06 Nov 2018 16:53
URI: http://epubs.surrey.ac.uk/id/eprint/847730

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800