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conferenceseries
.com
Volume 9
Journalof Nanomedicine&Nanotechnology
Asia Pacific Nano Congress 2018
August 10-11, 2018
August 10-11, 2018 Osaka, Japan
2
nd
World Congress on
Nanoscience and Nanotechnology
Innovative fast supercritical fluids synthesis of thermoelectric CoSb
3
nanoparticles
Angeline Poulon Quintin
1,2
1
Institute of Chemistry of Condensed Matter of Bordeaux, France
2
University of Bordeaux, France
T
hermoelectric (TE) materials have received a lot of interest for decades for
power generation applications in waste heat recovery or energy harvesting by
conversion of waste thermal energy into useful electricity. The performance of TE
devices depends on the dimensionless figure of merit ZT=(α²σ/κ) T, where α is the
Seebeck coefficient, σ and κ the electrical and thermal conductivities, respectively
and T is the absolute temperature. Many TE materials have been developed
such as Bi
2
Te
3
, PbTe, Mg
2
Si, Zn
4
Sb
3
, filled skutterudites and SiGe. Among them,
skutterudite compounds MX
3
(M=Co, Rh or Ir; X=P, As or Sb) crystalized in the
bcc structure Im3 are promising TE materials. The binary skutterudite CoSb3
exhibits a large Seebeck coefficient and a high electrical conductivity. However,
its high thermal
conductivity makes it difficult to be an efficient TE material. Nanostructuration is an effective approach to
lower thermal conductivity. While physical methods allow high purity microparticles synthesis, solution routes are the most
effective methods to produce CoSb
3
nanoparticles with a few nanometer size and have advantages of low cost, low processing
temperature (<300 °C) and high reproducibility, allowing possible large-scale production, even if they suffer from long reaction
time, multiple reaction steps and impurity presence. Supercritical fluid routes have emerged from the two last decades as novel
efficient approaches to synthetize metal nanoparticles with the control of their physicochemical properties as size, morphology,
crystallographic structure and composition. We report the first fast and continuous supercritical fluids synthesis of cobalt
antimony intermetallic nanoparticles (4-5 nm) with a high reliability.
Recent Publications
1. S Allain, S Gaudez, G Geandier, J C Hell, M Gouné, F Danoix, M Soler, S Aoued and A Poulon Quintin (2018) Internal
stresses and carbon enrichment in austenite of quenching and partitioning steels from high energy X-Ray diffraction
experiments.
Materials Science and Engineering A
; 710: 245-250.
2. F Balima, F Bellin, D Michau, O Viraphong, A Poulon Quintin, U C Chung, A Dourfaye and A Largeteau (2018) High
pressure pulsed electric current activated belt type (HP-SPS) for material processing.
Materials and Design
; 139: 541-548.
Biography
Angeline Poulon Quintin is an Associate Professor at the University of Bordeaux and ICMCB. She has a long experience in the correlation between process
parameters, microstructure and properties of structural and functional materials. Her current interests range from the search for innovative multifunctional coatings
to the development of green processes to elaborate intermetallic compounds for applications in energy, aerospace and aeronautical industries. She is a Specialist
in fine characterization with an extended recognized experience in electronic microscopy and physico-chemical techniques. She has co-authored 31 peer-reviewed
articles, 37 oral presentations, 12 invited conferences and 4 patents.
angeline.poulon@icmcb.cnrs.frAngeline Poulon Quintin, J Nanomed Nanotechnol 2018, Volume 9
DOI: 10.4172/2157-7439-C6-082