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
UR - http://www.scopus.com/inward/record.url?scp=0035330474&partnerID=8YFLogxK
U2 - 10.1016/S0167-2738(01)00734-2
DO - 10.1016/S0167-2738(01)00734-2
M3 - Conference article
AN - SCOPUS:0035330474
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 -