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High‐Temperature Electrical Transport Behavior Observed in the La 1.96 M 0.04 CuO 4 (M: Mg, Ca, Sr) Polycrystalline Ceramics
Author(s) -
Liu Yong,
Lin YuanHua,
Zhang BoPing,
Nan CeWen,
Li JingFeng
Publication year - 2008
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.1551-2916.2008.02366.x
Subject(s) - seebeck coefficient , spark plasma sintering , materials science , ceramic , crystallite , electrical resistivity and conductivity , thermoelectric effect , analytical chemistry (journal) , sintering , doping , mineralogy , thermal conductivity , metallurgy , composite material , chemistry , optoelectronics , thermodynamics , electrical engineering , physics , chromatography , engineering
We prepared high‐density La 1.96 M 0.04 CuO 4 (M: Mg, Ca, Sr) polycrystalline ceramics by a spark plasma sintering method, and investigated the temperature dependence of the electrical conductivity, Seebeck coefficient, and power factor. Our results indicate that the relative density of these sintered ceramic samples can reach nearly 100%, and alkaline earth metal ions doping can increase the activation energy (from 0.021 to 0.128 eV). All ceramic samples show high positive Seebeck coefficient (∼100–510 μV/K). The obtained Sr‐doped La 2 CuO 4 ceramics show better thermoelectric properties, which potentially make them for thermoelectric applications.