Structure and Electrical Properties of A‐site‐Deficient Perovskite Compounds in the La 2/3 TiO 3 ‐La 1/3 NbO 3  System | Zendy

Yoshioka Hideki | Zendy

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Structure and Electrical Properties of A‐site‐Deficient Perovskite Compounds in the La 2/3 TiO 3 ‐La 1/3 NbO 3 System

Author(s) -

Yoshioka Hideki

Publication year - 2002

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.1151-2916.2002.tb00276.x

Subject(s) - perovskite (structure) , natural bond orbital , superstructure , ionic conductivity , electrical resistivity and conductivity , ionic bonding , materials science , crystallography , analytical chemistry (journal) , chemistry , mineralogy , ion , thermodynamics , electrode , electrolyte , computational chemistry , density functional theory , physics , organic chemistry , chromatography , electrical engineering , engineering

The structure and electrical properties of an A‐site‐deficient perovskite compound found in the La 2/3 TiO 3 ‐La 1/3 NbO 3 system were investigated. The composition of the perovskite compound seemed to be very close to La 0.633 (Ti 0.90 Nb 0.10 )O 3 . X‐ray diffraction analysis revealed a superstructure with a doubled c ‐axis parameter, resulting from an ordered arrangement of the A‐site cation vacancies. Impedance measurements on the compound showed that La 0.633 (Ti 0.90 Nb 0.10 )O 3 had high ionic conductivity at relatively low temperature (<770 K) and increased electronic conduction at high temperature (>770 K). The bulk ionic conductivity was comparable with that of La 0.683 (Ti 0.95 Al 0.05 )O 3 , which has the highest ionic conductivity among the La‐(Ti,Al)‐O perovskite compounds.

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