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Electrical Conduction in Nano‐Structured La 0.9 Sr 0.1 Al 0.85 Co 0.05 Mg 0.1 O 3 Perovskite Oxide
Author(s) -
Basu Santanu,
Chakraborty Amitava,
Sujatha Devi Parukuttyamma,
Sekhar Maiti Himadri
Publication year - 2005
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.1551-2916.2005.00369.x
Subject(s) - nanocrystalline material , materials science , analytical chemistry (journal) , perovskite (structure) , electrical resistivity and conductivity , lanthanum , powder diffraction , dielectric spectroscopy , sintering , mineralogy , nuclear chemistry , crystallography , inorganic chemistry , metallurgy , chemistry , nanotechnology , electrochemistry , electrode , engineering , chromatography , electrical engineering
Nanocrystalline La 0.9 Sr 0.1 Al 0.85 Co 0.05 Mg 0.1 O 3 oxide powder was synthesized by a citrate–nitrate auto‐ignition process and characterized by thermal analysis, X‐ray diffraction, and impedance spectroscopy measurements. Nanocrystalline (50–100 nm) powder with perovskite structure could be produced at 900°C by this process. The powder could be sintered to a density more than 96% of the theoretical density at 1550°C. Impedance measurements on the sintered samples unequivocally established the potential of this process in developing nanostructured lanthanum aluminate‐based oxides. The sintered La 0.9 Sr 0.1 Al 0.85 Co 0.05 Mg 0.1 O 3 sample exhibited a conductivity of 2.40 × 10 −2 S/cm in air at 1000°C compared with 4.9 × 10 −3 S/cm exhibited by La 0.9 Sr 0.1 Al 0.85 Mg 0.15 O 3 .