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Temperature Dependence of Electrical Condutivity in Polycrystalline Tin Oxide
Author(s) -
Lee JongHeun,
Park SoonJa,
Hirota Kazushi
Publication year - 1990
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1990.tb06764.x
Subject(s) - materials science , electrical resistivity and conductivity , crystallite , activation energy , thermal conduction , sintering , oxide , electrical conduction , composite material , metallurgy , analytical chemistry (journal) , mineralogy , chemistry , electrical engineering , organic chemistry , chromatography , engineering
The electrical conductivity of polycrystalline SnO 2 in air was measured between 400° and 1400°C using samples prepared by hot isostatic pressing and normal sintering. The apparent activation energy for conduction above 800°C was 1.3 to 1.4 eV in the hot isostatically pressed sample and 1.9 to 2.0 eV in the normally sintered sample. This difference can be interpreted as a result of the pore contributing an additional blocking effect to conduction. Also we found that the electrical conductivity above 1150°C bent down slightly from the linear regime when using a cumulative slope model.