Surface phase in the CaWO4-WO3 system: A model for the topological structure of composites

E. Yu Konysheva; A. Ya Neiman

doi:10.1023/A:1015331719921

Surface phase in the CaWO₄-WO₃ system: A model for the topological structure of composites

E. Yu Konysheva^*
, A. Ya Neiman

^*Corresponding author for this work

Research output: Journal Publication › Article › peer-review

4 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	369-377
Number of pages	9
Journal	Russian Journal of Electrochemistry
Volume	38
Issue number	4
DOIs	https://doi.org/10.1023/A:1015331719921
Publication status	Published - Apr 2002
Externally published	Yes

ASJC Scopus subject areas

Electrochemistry

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title = "Surface phase in the CaWO4-WO3 system: A model for the topological structure of composites",

abstract = "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.",

author = "Konysheva, \{E. Yu\} and Neiman, \{A. Ya\}",

note = "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.",

year = "2002",

month = apr,

doi = "10.1023/A:1015331719921",

language = "English",

volume = "38",

pages = "369--377",

journal = "Russian Journal of Electrochemistry",

issn = "1023-1935",

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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 - https://www.scopus.com/pages/publications/1842523004

U2 - 10.1023/A:1015331719921

DO - 10.1023/A:1015331719921

M3 - Article

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SN - 1023-1935

VL - 38

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EP - 377

JO - Russian Journal of Electrochemistry

JF - Russian Journal of Electrochemistry

IS - 4

ER -

Surface phase in the CaWO₄-WO₃ system: A model for the topological structure of composites

Abstract

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