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Synthesis and Electrical Properties of La Doped SrTiO3 Powders by Ultrasonic Spray Pyrolysis

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Abstract:

La-doped SrTiO3 (LST) powders were synthesized by ultrasonic spray pyrolysis using an aqueous solution of a metal nitrate. SEM images showed that the as-prepared LST powders had a spherical morphology with a diameter of 1 μm. XRD patterns showed that the crystal phase of the as-prepared powders was amorphous and that the powders crystallized to the perovskite phase by calcination at 900 °C. The sintered LST body had the highest electrical conductivity at a La doping concentration (Lax) of 0.1 under a reducing atmosphere. A solid oxide fuel cell (SOFC) with La0.1Sr0.9TiO3Sm-doped CeO2 (1:9) as the anode exhibited a maximum power density of 137.8 mW/cm2 and an open circuit voltage of 1.08 V at 880 °C.

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Periodical:

Key Engineering Materials (Volume 582)

Pages:

115-118

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.582.115

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Online since:

September 2013

Authors:

Ken Genji, Kenichi Myoujin, Takayuki Kodera, Takashi Ogihara

Keywords:

Electrode, Perovskite, Solid Oxide Fuel Cell (SOFC), Spray Pyrolysis

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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