Spontaneous and electrical field-stimulated processes at the CaWO4|WO3 interface

Elena Konisheva, Elisaveta Gorbunova, Arkady Neiman

Research output: Journal PublicationConference articlepeer-review

14 Citations (Scopus)

Abstract

At the CaWO4|WO3 interface in air at 900°C under a minimum external mechanical pressure, two oppositely directed processes - (i) spreading of WO3 on the surface of CaWO4 and (ii) penetration of calcium from CaWO4 (or CaWO4 itself) into the bulk of WO3 - occur simultaneously. The electric field of a certain polarity accelerates both processes. To explain the experimental data, a model of the surface intermediate phase (CW-s) was proposed and proved in experiments. The key point is that the specific surface energy αCW-s is lower than αWO3 and αCaWO4.

Original languageEnglish
Pages (from-to)141-145
Number of pages5
JournalSolid State Ionics
Volume141-142
DOIs
Publication statusPublished - 1 May 2001
Externally publishedYes
Event14th Intenational Symposium on the Reactivity of Solids - Budapest, Hungary
Duration: 27 Aug 200031 Aug 2000

Keywords

  • Effect of electrical field
  • Solid oxide flow
  • Surface phenomena in solids

ASJC Scopus subject areas

  • Chemistry (all)
  • Materials Science (all)
  • Condensed Matter Physics

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