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Influences of ZnO on the Properties of SrZr 0.9 Y 0.1 O 2.95 Protonic Conductor
Author(s) -
Peng Zhenzhen,
Guo Ruisong,
Yin Ziguang,
Li Juan
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.1551-2916.2007.02222.x
Subject(s) - microstructure , materials science , sintering , yttrium , electrical resistivity and conductivity , zirconate , electromotive force , thermal conduction , strontium , doping , atmospheric temperature range , electrical conduction , ionic conductivity , ceramic , phase (matter) , ionic bonding , analytical chemistry (journal) , mineralogy , metallurgy , chemistry , composite material , ion , optoelectronics , electrode , oxide , electrical engineering , thermodynamics , organic chemistry , chromatography , electrolyte , engineering , titanate , physics
The effects of ZnO additive on the microstructure, phase formation, and electrical conduction of yttrium‐doped strontium zirconate were investigated. The sintering temperature of SrZr 0.9 Y 0.1 O 2.95 can be lowered to 1350°C by addition of ZnO. The electrical conduction is found to be strongly correlated with the ZnO contents. When the ZnO content is <5 mol%, the electrical conductivity increased with an increase in the ZnO contents. Electromotive force measurements under fuel cell conditions indicated a pure ionic conduction over this range of ZnO contents. However, it had a detrimental effect on the electrical conduction when the ZnO content was more than 6 mol%. The main reason for this is discussed according to the defect chemistry and microstructure.