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Volume 6 Research & Reviews: Journal of Material Sciences
ISSN: 2321-6212 Advanced Materials 2018
September 04-06, 2018
September 04-06, 2018 | Zürich, Switzerland
21st International Conference on
Advanced Materials & Nanotechnology
Thermoelectric properties of ZnO-based ceramics prepared by spark plasma sintering technique
P M Radingoana1, S Guillemet-Fritsch1, P A Olubambi2, C Estournès1 and J G Noudem3
1Université de Toulouse, CIRIMAT, CNRS INPT UPS, Université Paul-Sabatier, Toulouse, France
2University of Johannesburg, South Africa
3Crismat-Ensicaen, France
The scarcity and toxicity of high performance thermoelectric materials (such as Bi, Pb, Sb, Te etc.,) has shifted research to
focus on metal oxides and organic materials. Recently, inorganic–organic hybrids are of interest due to minimized thermal
conductivity and selective scattering of charge carriers that leads to high sea beck coefficient. In this work, Zn0.96Al0.04O prepared
through co-precipitation route was sintered using spark plasma sintering. Polyaniline (PANI) concentrations of 5wt% and 9wt%
were compared. High dense ceramic of 98.5±0.03% was obtained at a low sintering temperature of 250°C using Zn0.96Al0.04O/5wt%
PANI. Increasing PANI concentration decreased the relative density. Incorporation of PANI into the inorganic material reduced the
thermal conductivity from 27W/mK (0 wt% PANI) to 5.2W/mK (5 wt% PANI) and 3.2W/mK (9 wt% PANI) at 40°C. MaximumZT
of 2.2x10-6 is obtained at 200°C with PANI concentration of 9 wt%. These findings are an opening for low temperature applications
of ZnO-based ceramics.
Recent Publications
1. WuZH, XieHQ,WangY-Y, Xing J J andMa JH(2015)Nano junctionsContributing toHighPerformanceThermoelectric
ZnO-Based Inorganic-Organic Hybrids. Chinese Physics Letters 32(11):117303.
2. Wu Z H, Xie HQ and Zhai Y B (2013) Enhanced thermoelectric figure of merit in nanostructured ZnO by nano junction
effect. Applied Physics Letters 103(24):243901.
3. Li J, Tang X, Li H, Yan Y and Zhang Q (2010) Synthesis and thermoelectric properties of hydrochloric acid-doped
polyaniline. Synthetic Metals 18(3):53–55.
4. Mitra M, Kargupta K, Ganguly S, Goswami S and Banerjee D (2017) Facile synthesis and thermoelectric properties of
aluminum doped zinc oxide/polyaniline (AZO/PANI) hybrid. Synthetic Metals 228:25-31.
5. Zhang D B, Zhang B P, Shang P P, Gao C and Zhang Y Q (2014) Effect of ZnAl2O4 phase on thermoelectric properties of
Al doped ZnO ceramics fabricated by spark plasma sintering. Materials Research Innovations 18(4):110-115.
Biography
P M Radingoana is a PhD student at Université Paul Sabatier-CIRIMAT. She is currently working on “Spark plasma sintering of ZnO/polymer composites for thermoelectric
application”. Her research interests include Renewable Energies and Sustainable Development.
P M Radingoana et al., Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C3-020