Electrical transport properties of Ca3－xAgxCo4O9(x=0—0.05) oxide | Zendy

Feipeng Zhang | Zendy; Xin Zhang | Zendy; Lu Qing-Mei | Zendy; Jiuxing Zhang | Zendy

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Electrical transport properties of Ca3－xAgxCo4O9(x=0—0.05) oxide

Author(s) -

Feipeng Zhang,

Xin Zhang,

Lu Qing-Mei,

Jiuxing Zhang

Publication year - 2010

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.59.4211

Subject(s) - electrical resistivity and conductivity , materials science , doping , spark plasma sintering , microstructure , scanning electron microscope , analytical chemistry (journal) , sintering , composite material , chemistry , optoelectronics , electrical engineering , chromatography , engineering

The electrical transport properties of Ca3Co4O9 could be modified by doping in the Ca site. The Ca site doped Ca3-xAgxCo4O9(x=0—005) bulk samples were fabricated by citric acid sol-gel and spark plasma sintering method. The resulting samples were analyzed by X-ray power diffraction, scanning electron microscopy and electrical constant measurement. The results showed that all samples were single phased, the prefered orientation was lowered by Ag doping for Ca. The x=003 sample exhibited highest grain orientation among doped samples, which exhibited layered microstructure. Its electrical resistivity was increased and then decreased slightly by Ag doping, but the transport mechanism was not changed. However, the doped samples exhibited high electrical resistivity caused by changed electronic structure by Ag doping for Ca. The x=004 sample exhibited highest electrical resistivity in the measuring temperature region with the highest value 146 mΩ·cm at 973 K.

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