Affiliation:
1. Centro di studio per la termodinamica ed elettrochimica dei sistemi salini fusi e solidi del CNR Istituto di Chimica Fisica e di Elettrochimica, Universitä di Pavia (Italy)
Abstract
The formation in the solid state of CaWO4 from CaO (single crystal) or Ca3WO6 and WO3 was investigated by the contact method between 800 and 1000 °C in air and in argon.
The results obtained indicate that these reactions are governed by the diffusion of the W6+ and O2- ions.
From the CaWO4 structure, along with the lattice disorder predominant in this compound (0 vacancies and 0 interstitials) and the values of ionic mobilities, it was possible to state that the oxygen diffusion, via V0
2·, represents the rate - determining step in the considered reactions
Subject
Physical and Theoretical Chemistry,General Physics and Astronomy,Mathematical Physics
Cited by
5 articles.
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