EFFECT OF ALIOVALENT CATION DOPING ION THE ELECTRICAL-CONDUCTIVITY OFNA2SO4 - ROLE OF CHARGE AND SIZE OF THE DOPANT

Authors
SINGHVI A GOMATHY S GOPALAN P KULKARNI AR
Citation
A. Singhvi et al., EFFECT OF ALIOVALENT CATION DOPING ION THE ELECTRICAL-CONDUCTIVITY OFNA2SO4 - ROLE OF CHARGE AND SIZE OF THE DOPANT, Journal of solid state chemistry (Print), 138(2), 1998, pp. 183-192
Citations number
23
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Physical
Journal title
Journal of solid state chemistry (Print) → ACNP
ISSN journal
00224596
Volume
138
Issue
2
Year of publication
1998
Pages
183 - 192
Database
ISI
SICI code
0022-4596(1998)138:2<183:EOACDI>2.0.ZU;2-F
Abstract
A systematic study of the effect of size of the dopant and vacancy con centration on the electrical conductivity of Na2SO4 is reported. The e nhancement of conductivity, most pronounced with trivalent cation dopi ng, and maximized for 4 m/o Sm-2(SO4)(3), is more than three orders of magnitude at 200 degrees C. The enhancement of conductivity depends o n the extent of solid solubility, formation of intermediate compounds, and extent of vacancy-ion interaction. The size of the dopant influen ces the conductivity significantly. The effect of doping several catio ns simultaneously in Na2SO4 is also investigated, (C) 1998 Academic Pr ess.