Preparation of Stable Suspensions of Perovskites for Plasma Spraying

C. Monterrubio-Badillo; T. Chartier; H. Ageorges; J. F. Coudert; P. Fauchais

doi:10.4028/www.scientific.net/msf.442.91

Preparation of Stable Suspensions of Perovskites for Plasma Spraying

C. Monterrubio-Badillo, T. Chartier, H. Ageorges, J. F. Coudert, P. Fauchais

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

The objective of this work is to obtain thin films of perovskites for use as a cathode of SOFCs (Solid Oxide Fuel Cell) by suspension plasma spraying. This process consists in mechanically injecting a well dispersed stable suspension of micrometric particles in a direct current (dc) plasma jet. In the process, large suspension droplets (∼300 μm) are divided into tiny ones (a few μm) by the plasma jet flow. Then the solvent is evaporated and the particles melt resulting in perovskite droplets of about 1 urn impacting on a substrate. Two types of suspensions were prepared. The first one contains an attrition-milled mixture of La₂O₃ and MnO₂ powders (d₅₀ = 1 μm) and the second one an attrition-milled LaMnO₃ perovskite powder (d₅₀ = 0.8 μm). The La ₂O₃/MnO₂ suspension has been injected with an arc current of 400 A and with a plasma forming gas Ar/H₂. In this case, a strong MnO₂ evaporation takes place which hinders the perosvskite forming reaction in the plasma jet. The LaMnO₃ perovskite suspension has been injected with an arc current of 300 A and three different plasma forming gases: Ar, Ar/H₂ and Ar/H₂/He. Satisfactory coatings of perovskite can be obtained with Ar, Other plasma forming gases result in perovskite decomposition.

Original language	English
Pages (from-to)	91-96
Number of pages	6
Journal	Materials Science Forum
Volume	442
DOIs	https://doi.org/10.4028/www.scientific.net/msf.442.91
State	Published - 2003
Externally published	Yes
Event	Advanced Structural Materials Symposium of the Annual Congress of the Mexican Academy of Materials Science - Cancun Quintana Roo, Mexico Duration: 26 Aug 2002 → 31 Aug 2002

Keywords

Perovskites
Plasma Spraying
Suspension

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title = "Preparation of Stable Suspensions of Perovskites for Plasma Spraying",

abstract = "The objective of this work is to obtain thin films of perovskites for use as a cathode of SOFCs (Solid Oxide Fuel Cell) by suspension plasma spraying. This process consists in mechanically injecting a well dispersed stable suspension of micrometric particles in a direct current (dc) plasma jet. In the process, large suspension droplets (∼300 μm) are divided into tiny ones (a few μm) by the plasma jet flow. Then the solvent is evaporated and the particles melt resulting in perovskite droplets of about 1 urn impacting on a substrate. Two types of suspensions were prepared. The first one contains an attrition-milled mixture of La2O3 and MnO2 powders (d50 = 1 μm) and the second one an attrition-milled LaMnO3 perovskite powder (d50 = 0.8 μm). The La 2O3/MnO2 suspension has been injected with an arc current of 400 A and with a plasma forming gas Ar/H2. In this case, a strong MnO2 evaporation takes place which hinders the perosvskite forming reaction in the plasma jet. The LaMnO3 perovskite suspension has been injected with an arc current of 300 A and three different plasma forming gases: Ar, Ar/H2 and Ar/H2/He. Satisfactory coatings of perovskite can be obtained with Ar, Other plasma forming gases result in perovskite decomposition.",

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author = "C. Monterrubio-Badillo and T. Chartier and H. Ageorges and Coudert, {J. F.} and P. Fauchais",

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T1 - Preparation of Stable Suspensions of Perovskites for Plasma Spraying

AU - Monterrubio-Badillo, C.

AU - Chartier, T.

AU - Ageorges, H.

AU - Coudert, J. F.

AU - Fauchais, P.

PY - 2003

Y1 - 2003

N2 - The objective of this work is to obtain thin films of perovskites for use as a cathode of SOFCs (Solid Oxide Fuel Cell) by suspension plasma spraying. This process consists in mechanically injecting a well dispersed stable suspension of micrometric particles in a direct current (dc) plasma jet. In the process, large suspension droplets (∼300 μm) are divided into tiny ones (a few μm) by the plasma jet flow. Then the solvent is evaporated and the particles melt resulting in perovskite droplets of about 1 urn impacting on a substrate. Two types of suspensions were prepared. The first one contains an attrition-milled mixture of La2O3 and MnO2 powders (d50 = 1 μm) and the second one an attrition-milled LaMnO3 perovskite powder (d50 = 0.8 μm). The La 2O3/MnO2 suspension has been injected with an arc current of 400 A and with a plasma forming gas Ar/H2. In this case, a strong MnO2 evaporation takes place which hinders the perosvskite forming reaction in the plasma jet. The LaMnO3 perovskite suspension has been injected with an arc current of 300 A and three different plasma forming gases: Ar, Ar/H2 and Ar/H2/He. Satisfactory coatings of perovskite can be obtained with Ar, Other plasma forming gases result in perovskite decomposition.

AB - The objective of this work is to obtain thin films of perovskites for use as a cathode of SOFCs (Solid Oxide Fuel Cell) by suspension plasma spraying. This process consists in mechanically injecting a well dispersed stable suspension of micrometric particles in a direct current (dc) plasma jet. In the process, large suspension droplets (∼300 μm) are divided into tiny ones (a few μm) by the plasma jet flow. Then the solvent is evaporated and the particles melt resulting in perovskite droplets of about 1 urn impacting on a substrate. Two types of suspensions were prepared. The first one contains an attrition-milled mixture of La2O3 and MnO2 powders (d50 = 1 μm) and the second one an attrition-milled LaMnO3 perovskite powder (d50 = 0.8 μm). The La 2O3/MnO2 suspension has been injected with an arc current of 400 A and with a plasma forming gas Ar/H2. In this case, a strong MnO2 evaporation takes place which hinders the perosvskite forming reaction in the plasma jet. The LaMnO3 perovskite suspension has been injected with an arc current of 300 A and three different plasma forming gases: Ar, Ar/H2 and Ar/H2/He. Satisfactory coatings of perovskite can be obtained with Ar, Other plasma forming gases result in perovskite decomposition.

KW - Perovskites

KW - Plasma Spraying

KW - Suspension

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T2 - Advanced Structural Materials Symposium of the Annual Congress of the Mexican Academy of Materials Science

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ER -

Preparation of Stable Suspensions of Perovskites for Plasma Spraying

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Keywords

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