HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Improving the thermoelectric properties of SrTiO3-based ceramics with metallic inclusions

Abstract : High quality Sr0.8La0.067Ti0.8Nb0.2O3-delta ceramics containing inclusions of Cu or Fe were prepared by the mixed oxide route and sintered under reducing conditions at 1700 K. Products were high density; Fe enhanced density (to 98% theoretical) and grain size (to 15 mm) whilst Cu tended to reduce both slightly. XRD and SEM analyses showed that the material is mainly composed of cubic SrTiO3 phase, with rutile-structured minor phases and metallic inclusions along the grain boundaries. The inclusions increased carrier concentration and carrier mobility, leading to a reduction in electrical resistivity by a factor of 5 and increase in power factor by 75%. Both types of metallic inclusions were beneficial, increasing the thermoelectric figure of merit (ZT) from 0.25 at 1000 K for the control sample, to ZT of 0.36 at 900 K for the Cu-containing samples and to 0.38 at 1000 K for the Fe-containing samples. (C) 2017 The Authors. Published by Elsevier B.V.
Document type :
Journal articles
Complete list of metadata

Contributor : Université Normandie Connect in order to contact the contributor
Submitted on : Friday, July 5, 2019 - 9:51:49 AM
Last modification on : Wednesday, April 27, 2022 - 9:49:21 AM

Links full text



Deepanshu Srivastava, Colin Norman, Feridoon Azough, Marion C. Schafer, Emmanuel Guilmeau, et al.. Improving the thermoelectric properties of SrTiO3-based ceramics with metallic inclusions. Journal of Alloys and Compounds, Elsevier, 2018, 731, pp.723-730. ⟨10.1016/j.jallcom.2017.10.033⟩. ⟨hal-02174382⟩



Record views