Granular and Lamellar Thermoelectric Oxides Consolidated by Spark Plasma Sintering

Using the spark plasma sintering (SPS) technique, dense nanostructured Ca 0.95 Sm 0.05 MnO 3 ( n -type) and textured Ca 3 Co 4 O 9 ( p -type) ceramics were prepared. Nanoceramic powders of doped n -type were synthesized using two routes: coprecipitation and solid-state reaction. The SPS method has b...

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Bibliographic Details
Published in:Journal of electronic materials 2011-05, Vol.40 (5), p.1100-1106
Main Authors: Noudem, J. G., Kenfaui, D., Chateigner, D., Gomina, M.
Format: Article
Language:English
Subjects:
Bulk density
Characterization and Evaluation of Materials
Chemistry and Materials Science
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conductivity phenomena in semiconductors and insulators
Coprecipitation
Cross-disciplinary physics: materials science
rheology
Electronic transport in condensed matter
Electronics and Microelectronics
Engineering Sciences
Environmental Sciences
Exact sciences and technology
Instrumentation
Materials
Materials Science
Mechanical properties
Morphology
Nanocrystalline materials
Nanomaterials
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Optical and Electronic Materials
Oxides
Physics
Plasma sintering
Reactive fluid environment
Solid State Physics
Spark plasma sintering
Thermodynamics
Thermoelectric and thermomagnetic effects
Thermoelectricity
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Summary:Using the spark plasma sintering (SPS) technique, dense nanostructured Ca 0.95 Sm 0.05 MnO 3 ( n -type) and textured Ca 3 Co 4 O 9 ( p -type) ceramics were prepared. Nanoceramic powders of doped n -type were synthesized using two routes: coprecipitation and solid-state reaction. The SPS method has been used to control the samples’ densification and grain growth. Microstructural investigations reveal that the SPS technique results in high bulk density and homogeneous morphology for Ca 0.95 Sm 0.05 MnO 3 , and grain alignment for Ca 3 Co 4 O 9 . The thermoelectric and mechanical properties were investigated, showing a dependence on the starting grain size and being governed by the SPS conditions.
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-011-1550-z