Effects of thermal treatments on the conductance of tin oxide

M.S. CASTRO Y C.M. ALDAO

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY

Año: 2000 vol. 20 p. 303 - 307

0955-2219

Temperature dependence of electrical conductivity during heating and cooling under di€fferent atmospheres and resistivity transients at step isothermal changes in oxygen pressure of SnO2 sintered pellets are investigated. It is found that di€erent thermal treatments in sample preparation give rise to diverse conductivity behaviors as a function of temperature and transient responses.These results indicate that grain sizes and widths of the depletion layers are responsible for the observed results. Also, oxygen diffusion into the tin oxide grain plays a significant role accounting for the observed conductance changes.