TY - JOUR
T1 - Surface phase in the CaWO4-WO3 system
T2 - A model for the topological structure of composites
AU - Konysheva, E. Yu
AU - Neiman, A. Ya
N1 - Funding Information:
This work was supported by the Russian Foundation for Basic Research, project no. 01-03-33 160; program Universities of Russia—Fundamental Research; and program CRDF, project no. REC-005.
PY - 2002/4
Y1 - 2002/4
N2 - Physicochemical and transport properties of composites formed by CaWO 4 (mixed electron-ion conductor) and WO3 (n-semiconductor) are studied. At χ < 30 mol %, the CaWO4·χWO 3 composites display ionic conduction, which turns into electron conduction at χ > 30 mol %. During contact of WO3 with CaWO4, both phases undergo a qualitative transformation at high temperatures, which is caused by the formation of a surface phase, CW-s. Electric properties of the composites at 900°C are considered within the model proposed for their topological structure.
AB - Physicochemical and transport properties of composites formed by CaWO 4 (mixed electron-ion conductor) and WO3 (n-semiconductor) are studied. At χ < 30 mol %, the CaWO4·χWO 3 composites display ionic conduction, which turns into electron conduction at χ > 30 mol %. During contact of WO3 with CaWO4, both phases undergo a qualitative transformation at high temperatures, which is caused by the formation of a surface phase, CW-s. Electric properties of the composites at 900°C are considered within the model proposed for their topological structure.
UR - http://www.scopus.com/inward/record.url?scp=1842523004&partnerID=8YFLogxK
U2 - 10.1023/A:1015331719921
DO - 10.1023/A:1015331719921
M3 - Article
AN - SCOPUS:1842523004
SN - 1023-1935
VL - 38
SP - 369
EP - 377
JO - Russian Journal of Electrochemistry
JF - Russian Journal of Electrochemistry
IS - 4
ER -