Proton conducting Sr0.02La0.98Nb0.6Ta0.4O4 powders were prepared by auto-combustion or co-precipitation methods from aqueous solutions using citrates and oxalates as complexing agents. After calcination at 1100◦C the two methods lead to powders with sub-micrometric average particle size, 0.5 μm and 0.7 μm, respectively. Upon sintering at 1600◦C, pellets with an average grain size of 11 μm for the auto-combustion method and of 7 μm for the co-precipitation method were obtained. The electrical conductivity measured on sintered pellets at 800◦C in wet argon atmosphere was 1.9 × 10−4 S cm−1 for the material obtained by co-precipitation method, 1.8 × 10−4 S cm−1 for the one derived from auto-combustion method, and 7.4 × 10−5 S cm−1 for the one produced by solid state reaction. The improvement in conductivity of the wet chemistry methods with respect to the solid state reaction was ascribed to the better control of the cation mixing with the synthetic conditions.

Santibanez Mendieta, A., Fabbri, E., Licoccia, S., Traversa, E. (2011). Soft Chemistry Routes for the Synthesis of Sr0.02La0.98Nb0.6Ta0.4O4 Proton Conductor. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 158(12), B1485-B1490 [10.1149/2.027112jes].

Soft Chemistry Routes for the Synthesis of Sr0.02La0.98Nb0.6Ta0.4O4 Proton Conductor

LICOCCIA, SILVIA;TRAVERSA, ENRICO
2011-01-01

Abstract

Proton conducting Sr0.02La0.98Nb0.6Ta0.4O4 powders were prepared by auto-combustion or co-precipitation methods from aqueous solutions using citrates and oxalates as complexing agents. After calcination at 1100◦C the two methods lead to powders with sub-micrometric average particle size, 0.5 μm and 0.7 μm, respectively. Upon sintering at 1600◦C, pellets with an average grain size of 11 μm for the auto-combustion method and of 7 μm for the co-precipitation method were obtained. The electrical conductivity measured on sintered pellets at 800◦C in wet argon atmosphere was 1.9 × 10−4 S cm−1 for the material obtained by co-precipitation method, 1.8 × 10−4 S cm−1 for the one derived from auto-combustion method, and 7.4 × 10−5 S cm−1 for the one produced by solid state reaction. The improvement in conductivity of the wet chemistry methods with respect to the solid state reaction was ascribed to the better control of the cation mixing with the synthetic conditions.
2011
Sottoposto a rivista
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore CHIM/07 - FONDAMENTI CHIMICI DELLE TECNOLOGIE
Settore ING-IND/22 - SCIENZA E TECNOLOGIA DEI MATERIALI
English
Con Impact Factor ISI
proton conductors, fuel cell
http://dx.doi.org/10.1149/2.027112jes
Santibanez Mendieta, A., Fabbri, E., Licoccia, S., Traversa, E. (2011). Soft Chemistry Routes for the Synthesis of Sr0.02La0.98Nb0.6Ta0.4O4 Proton Conductor. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 158(12), B1485-B1490 [10.1149/2.027112jes].
Santibanez Mendieta, A; Fabbri, E; Licoccia, S; Traversa, E
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/41584
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