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

Elena Konisheva; Elisaveta Gorbunova; Arkady Neiman

doi:10.1016/S0167-2738(01)00734-2

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

Elena Konisheva, Elisaveta Gorbunova, Arkady Neiman

Research output: Journal Publication › Conference article › peer-review

15 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 α_CW-s is lower than α_WO3 and α_CaWO4.

Original language	English
Pages (from-to)	141-145
Number of pages	5
Journal	Solid State Ionics
Volume	141-142
DOIs	https://doi.org/10.1016/S0167-2738(01)00734-2
Publication status	Published - 1 May 2001
Externally published	Yes
Event	14th Intenational Symposium on the Reactivity of Solids - Budapest, Hungary Duration: 27 Aug 2000 → 31 Aug 2000

Keywords

Effect of electrical field
Solid oxide flow
Surface phenomena in solids

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

Access to Document

10.1016/S0167-2738(01)00734-2

Cite this

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title = "Spontaneous and electrical field-stimulated processes at the CaWO4|WO3 interface",

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.",

keywords = "Effect of electrical field, Solid oxide flow, Surface phenomena in solids",

author = "Elena Konisheva and Elisaveta Gorbunova and Arkady Neiman",

note = "Funding Information: This study was supported by the Russian Foundation for Basic Research (grant 98-03-32606a), by a grant from the Russian Federal Program “Universities of Russia-Fundamental Research” (No. 616), and in part by Award No. REC-005 of the US Civilian Research and Development Foundation for the Independent States of the Former Soviet Union (CRDF). The authors wish to thank T.N. Tabatchikova who performed the atomic adsorption analysis.; 14th Intenational Symposium on the Reactivity of Solids ; Conference date: 27-08-2000 Through 31-08-2000",

year = "2001",

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doi = "10.1016/S0167-2738(01)00734-2",

language = "English",

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TY - JOUR

T1 - Spontaneous and electrical field-stimulated processes at the CaWO4|WO3 interface

AU - Konisheva, Elena

AU - Gorbunova, Elisaveta

AU - Neiman, Arkady

N1 - Funding Information: This study was supported by the Russian Foundation for Basic Research (grant 98-03-32606a), by a grant from the Russian Federal Program “Universities of Russia-Fundamental Research” (No. 616), and in part by Award No. REC-005 of the US Civilian Research and Development Foundation for the Independent States of the Former Soviet Union (CRDF). The authors wish to thank T.N. Tabatchikova who performed the atomic adsorption analysis.

PY - 2001/5/1

Y1 - 2001/5/1

N2 - 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.

AB - 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.

KW - Effect of electrical field

KW - Solid oxide flow

KW - Surface phenomena in solids

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U2 - 10.1016/S0167-2738(01)00734-2

DO - 10.1016/S0167-2738(01)00734-2

M3 - Conference article

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SN - 0167-2738

VL - 141-142

SP - 141

EP - 145

JO - Solid State Ionics

JF - Solid State Ionics

T2 - 14th Intenational Symposium on the Reactivity of Solids

Y2 - 27 August 2000 through 31 August 2000

ER -