Solution precursor plasma spray of porous La1-xSrx MnO3 perovskite coatings for SOFC cathode application

  1. Get@NRC: Solution precursor plasma spray of porous La1-xSrx MnO3 perovskite coatings for SOFC cathode application (Opens in a new window)
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Journal titleJournal of Fuel Cell Science and Technology
Article number21005
SubjectAtomizing gas; Cathode coating; Cathode materials; Direct current plasmas; High quality; High temperature; La<sub>1-x</sub>Sr<sub>x</sub>MnO<sub>3</sub> (LSM) cathode; Large pores; Perovskite coatings; Plasma spray; Porous agglomerates; Porous cathodes; Process parameters; Processing parameters; Sintered coatings; Small particles; Solid oxide; Solution precursor; Solution precursor plasma spray; SPPS; Agglomeration; Cathodes; Manganese oxide; Molten materials; Pinch effect; Plasma jets; Plasma spraying; Plasmas; Protective coatings; Sintering; Solid oxide fuel cells (SOFC); Surface plasmon resonance; X ray diffraction; Perovskite
AbstractThe deposition of porous La1-xSrx MnO3 (LSM) perovskite cathode materials by conventional plasma spray has been a challenge because of the decomposition of perovskite materials to their suboxides at high temperature. In this paper, the solution precursor plasma spraying (SPPS) process, in which solution precursors of the desired resultant materials are fed into a direct current plasma jet by atomizing gas, was used to simultaneously synthesize LSM perovskite and deposit porous cathode coatings. The experimental results show that process parameters have a significant effect on the fabricated coatings. The perovskite coatings consist of porous agglomerates of small particles with rounded features and local denser regions referred to as thick flakes. The small particles and thick flakes were held together by the previously molten material. There are two kinds of pores in the fabricated coatings: large pores located between the agglomerates and fine pores inside the agglomerates. The porous LSM cathode coatings have 20-40 area % of desirable homogeneous pores determined by several processing parameters. X-ray diffraction of sintered coatings shows that no suboxides of La 1-xSrx MnO3 perovskite appear. The results of this project indicate that the SPPS is a potential process to produce high quality cathodes for solid oxide fuel cell application. © 2011 American Society of Mechanical Engineers.
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AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute (IMI-IMI)
Peer reviewedYes
NPARC number21271346
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Record identifier38d14a1f-9e55-4359-bde5-be55fe64d3c5
Record created2014-03-24
Record modified2016-05-09
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