Enhancement of Thermoelectric Performance of Sr0.9‐xNd0.1Ti0.9Nb0.1O3 Ceramics by Introducing Sr Vacancies. Issue 21 (17th August 2018)

• Record Type: Journal Article
• Authors: Chen, Yufei; Liu, Jian; Li, Xin; Li, Yi; Su, Wenbin; Li, Jichao; Zhao, LanLing; Wang, ChunLei; Lu, Minghui
• Is Part Of: Physica status solidi. Volume 215:Issue 21(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-08-17
• Subjects: Sr0.9‐xNd0.1Ti0.9Nb0.1O3 -- Sr vacancies -- thermoelectric -- ZT; Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201800459
• Languages: English
• ISSNs: 1862-6300

Abstract

Abstract : Thermoelectric properties of Sr‐deficient Sr0.9‐x Nd0.1 Ti0.9 Nb0.1 O3 ceramics are investigated in this work. Because of the significantly enhanced carrier mobility by introducing Sr vacancies, both of electrical conductivity and absolute Seebeck coefficient are enhanced, resulting in the improvement of power factor. Meanwhile, the lattice thermal conductivity decreases with the increasing content of Sr vacancies, indicating that Sr vacancies act as point defects and scatter phonons. Consequently, thermoelectric performance of Sr0.9‐x Nd0.1 Ti0.9 Nb0.1 O3 ceramics is enhanced obviously by introducing Sr vacancies, and the figure of merit ZT reaches a maximum of 0.32 at 1073 K in the sample x = 0.04, increasing by 60% as compared with that of the sample x = 0. Abstract : Thermoelectric properties of Sr‐deficient Sr0.9‐x Nd0.1 Ti0.9 Nb0.1 O3 ceramics are investigated in this work. Because of the significantly enhanced carrier mobility by introducing Sr vacancies in SrTiO3, both of electrical conductivity and absolute Seebeck coefficient are enhanced, resulting in the improvement of power factor. So the thermoelectric properties of SrTiO3 ceramics is enhanced obviously.