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, inorganicâ��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):53â��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