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Electrical Conduction Behavior of La 1+ x Sr 1− x Ga 3 O 7–δ Melilite‐Type Ceramics
Author(s) -
Rozumek Michael,
Majewski Peter,
Schluckwerder Heike,
Aldinger Fritz,
Künstler Klaus,
Tomandl Gerhard
Publication year - 2004
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.1551-2916.2004.01795.x
Subject(s) - melilite , analytical chemistry (journal) , ceramic , electrical resistivity and conductivity , strontium , lanthanum , mineralogy , electromotive force , conductivity , materials science , thermal conduction , chemistry , metallurgy , inorganic chemistry , electrical engineering , composite material , organic chemistry , chromatography , spinel , engineering
Ceramics of the melilite‐type compound La 1+ x Sr 1− x Ga 3 O 7−δ were prepared by conventional ceramic processing. Samples prepared represented the entire homogeneity region of the phase (i.e., x =−0.15 to 0.60). Electrochemical characterization under variable temperature and atmospheric conditions in the vicinity of air entailed four‐point direct‐current conductivity measurements and electromotive force measurements. La 1+ x Sr 1− x Ga 3 O 7−δ samples exhibited a p ‐type behavior with generally increased conductivity with increased substitution of lanthanum for strontium, which reached a saturation value of ∼10 −1 S·cm −1 at 950°C.