Influence of sintering methods on microstructure and ionic conductivity of La1.95Sr0.05Zr2O6.975 synthesized by co-precipitation

We present here the synthesis of Sr-doped lanthanumzirconate pyrochlores La1.95Sr0.05Zr2O6.975with controlled grain sizes and we compare different methods of sintering. Pyrochlores are systems where it is hard to achieve high density without a significant coarsening of the sample microstructure. It is shown that the use of Spark Plasma Sintering (SPS) can produce high density ceramic samples while maintaining a nanometric grain size, a key factor for enhancing electrical and mechanical properties. Furthermore, ionic conductivity is found higher in samples sintered using SPS than in those produced by hot pressing.

Mots clés

Pyrochlore Hot pressing Ionic conductivity Spark Plasma Sintering Surface decomposition

Domaines

Chimie

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HUO_SSI_2015_generated_file.pdf (962.6 Ko)

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https://hal.science/hal-01187785

Soumis le : mardi 1 décembre 2015-16:53:13

Dernière modification le : mardi 3 septembre 2024-11:38:39

Archivage à long terme le : samedi 29 avril 2017-01:42:57

Dates et versions

hal-01187785 , version 1 (01-12-2015)

Identifiants

HAL Id : hal-01187785 , version 1
DOI : 10.1016/j.ssi.2015.05.028

Citer

Da Huo, Dominique Gosset, David Siméone, Gianguido Baldinozzi, Hicham Khodja, et al.. Influence of sintering methods on microstructure and ionic conductivity of La1.95Sr0.05Zr2O6.975 synthesized by co-precipitation. Solid State Ionics, 2015, 278, pp.181-185. ⟨10.1016/j.ssi.2015.05.028⟩. ⟨hal-01187785⟩

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