Research & Reviews: Journal of Material Sciences
MenuISSN:2321-6212
ISSN:2321-6212
P M Radingoana, S Guillemet-Fritsch, P A Olubambi, C Estournes and J G Noudem
Universite de Toulouse, CIRIMAT, CNRS INPT UPS, Universite Paul-Sabatier, Toulouse, France University of Johannesburg, South Africa Crismat-Ensicaen, France
ScientificTracks Abstracts: Res. Rev. J Mat. Sci
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 27 W/mK (0 wt% PANI) to 5.2 W/mK (5 wt% PANI) and 3.2 W/mK (9 wt% PANI) at 40°C. Maximum ZT 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. Wu Z H, Xie H Q, Wang Y-Y, Xing J J and Ma J H (2015) Nano junctions Contributing to High Performance Thermoelectric ZnO-Based Inorganic-Organic Hybrids. Chinese Physics Letters 32(11):117303. 2. Wu Z H, Xie H Q 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.
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.
E-mail: radingoana@chimie.ups-tlse.fr