Effect of aliovalent cation doping on the electrical conductivity of Na{sub 2}SO{sub 4}: Role of charge and size of the dopant

Journal Article · Wed Jul 01 00:00:00 EDT 1998 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1998.7770· OSTI ID:651111

Singhvi, A; Gomathy, S; Gopalan, P; Kulkarni, A R ^[1]

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1. Indian Inst. of Tech., Bombay (India). Dept. of Metallurgical Engineering and Materials Science

A systematic study of the effect of size of the dopant and vacancy concentration on the electrical conductivity of Na{sub 2}So{sub 4} is reported. The enhancement of conductivity, most pronounced with trivalent cation doping, and maximized for 4 m/o Sm{sub 2}(SO{sub 4}){sub 3}, is more than three orders of magnitude at 200 C. The enhancement of conductivity depends on the extent of solid solubility, formation of intermediate compounds, and extent of vacancy-ion interaction. The size of the dopant influences the conductivity significantly. The effect of doping several cations simultaneously in Na{sub 2}SO{sub 4} is also investigated.

• OSTI ID: 651111
• Journal Information: Journal of Solid State Chemistry, Vol. 138, Issue 2; Other Information: PBD: Jul 1998
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ELECTRIC CONDUCTIVITY
SODIUM SULFATES
DOPED MATERIALS
RARE EARTHS
ALKALINE EARTH METALS
X-RAY DIFFRACTION
CATIONS
VACANCIES
EXPERIMENTAL DATA