Enhancement of Thermoelectric Performance of Sr0.9-xNd0.1Ti0.9Nb0.1O3 Ceramics by Introducing Sr Vacancies

被引：3

作者：

Chen, Yufei ^{[1
]}

Liu, Jian ^{[1
,2
]}

Li, Xin ^{[3
]}

Li, Yi ^{[1
]}

Su, Wenbin ^{[1
]}

Li, Jichao ^{[1
]}

Zhao, LanLing ^{[1
]}

Wang, ChunLei ^{[1
,3
]}

Lu, Minghui ^{[2
]}

机构：

[1] Shandong Univ, Sch Phys, Jinan 250100, Shandong, Peoples R China

[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[3] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2018年 / 215卷 / 21期

基金：

中国国家自然科学基金;

关键词：

Sr0.9-xNd0.1Ti0.9Nb0.1O3; Sr vacancies; thermoelectric; ZT; DEFICIENT SRTIO3 CERAMICS; HIGH-FIGURE; MERIT; LA; POWER;

D O I：

10.1002/pssa.201800459

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thermoelectric properties of Sr-deficient Sr0.9-xNd0.1Ti0.9Nb0.1O3 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-xNd0.1Ti0.9Nb0.1O3 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.

引用

页数：4

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