Enhanced thermoelectric properties of Sr0.9La0.1TiO3 ceramics fabricated by SPS with nanosized Ti addition

Mengjie Qin; Zhihao Lou; Zongmo Shi; Ruizhi Zhang; Jie Xu; Feng Gao

doi:10.1007/s10854-020-03255-4

Enhanced thermoelectric properties of Sr_0.9La_0.1TiO₃ ceramics fabricated by SPS with nanosized Ti addition

Mengjie Qin, Zhihao Lou, Zongmo Shi, Ruizhi Zhang, Jie Xu, Feng Gao

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Sr_0.9La_0.1TiO₃/20 wt%Ti ceramics with enhanced thermoelectric properties were prepared by spark plasma sintering (SPS) and nanosized Ti metal powders were used as additive. In the sintering process, a large proportion of Ti was oxidized, promoting the volatilization of lattice oxygen and creating more VO··. Part of sintering aid Bi₂O₃ was reduced to metal Bi particles which facilitate carriers transport by forming an electron transport network. These two factors contribute to electrical resistivity reduction. The lowest electrical resistivity of ρ_389K = 4.0 × 10^–4Ω cm and ρ_1120K = 1.5 × 10^–3 Ω cm and the maximum PF value PF_389K = 1.08 mW/m/K² were obtained. This work demonstrates that nanosized Ti addition together with Bi₂O₃ sintering aid in SPS process enhances the thermoelectric performance of Sr_0.9La_0.1TiO₃.

Original language	English
Pages (from-to)	6919-6926
Number of pages	8
Journal	Journal of Materials Science: Materials in Electronics
Volume	31
Issue number	9
DOIs	https://doi.org/10.1007/s10854-020-03255-4
State	Published - 1 May 2020

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title = "Enhanced thermoelectric properties of Sr0.9La0.1TiO3 ceramics fabricated by SPS with nanosized Ti addition",

abstract = "Sr0.9La0.1TiO3/20 wt%Ti ceramics with enhanced thermoelectric properties were prepared by spark plasma sintering (SPS) and nanosized Ti metal powders were used as additive. In the sintering process, a large proportion of Ti was oxidized, promoting the volatilization of lattice oxygen and creating more VO··. Part of sintering aid Bi2O3 was reduced to metal Bi particles which facilitate carriers transport by forming an electron transport network. These two factors contribute to electrical resistivity reduction. The lowest electrical resistivity of ρ389K = 4.0 × 10–4Ω cm and ρ1120K = 1.5 × 10–3 Ω cm and the maximum PF value PF389K = 1.08 mW/m/K2 were obtained. This work demonstrates that nanosized Ti addition together with Bi2O3 sintering aid in SPS process enhances the thermoelectric performance of Sr0.9La0.1TiO3.",

author = "Mengjie Qin and Zhihao Lou and Zongmo Shi and Ruizhi Zhang and Jie Xu and Feng Gao",

note = "Publisher Copyright: {\textcopyright} 2020, Springer Science+Business Media, LLC, part of Springer Nature.",

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doi = "10.1007/s10854-020-03255-4",

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T1 - Enhanced thermoelectric properties of Sr0.9La0.1TiO3 ceramics fabricated by SPS with nanosized Ti addition

AU - Qin, Mengjie

AU - Lou, Zhihao

AU - Shi, Zongmo

AU - Zhang, Ruizhi

AU - Xu, Jie

AU - Gao, Feng

PY - 2020/5/1

Y1 - 2020/5/1

N2 - Sr0.9La0.1TiO3/20 wt%Ti ceramics with enhanced thermoelectric properties were prepared by spark plasma sintering (SPS) and nanosized Ti metal powders were used as additive. In the sintering process, a large proportion of Ti was oxidized, promoting the volatilization of lattice oxygen and creating more VO··. Part of sintering aid Bi2O3 was reduced to metal Bi particles which facilitate carriers transport by forming an electron transport network. These two factors contribute to electrical resistivity reduction. The lowest electrical resistivity of ρ389K = 4.0 × 10–4Ω cm and ρ1120K = 1.5 × 10–3 Ω cm and the maximum PF value PF389K = 1.08 mW/m/K2 were obtained. This work demonstrates that nanosized Ti addition together with Bi2O3 sintering aid in SPS process enhances the thermoelectric performance of Sr0.9La0.1TiO3.

AB - Sr0.9La0.1TiO3/20 wt%Ti ceramics with enhanced thermoelectric properties were prepared by spark plasma sintering (SPS) and nanosized Ti metal powders were used as additive. In the sintering process, a large proportion of Ti was oxidized, promoting the volatilization of lattice oxygen and creating more VO··. Part of sintering aid Bi2O3 was reduced to metal Bi particles which facilitate carriers transport by forming an electron transport network. These two factors contribute to electrical resistivity reduction. The lowest electrical resistivity of ρ389K = 4.0 × 10–4Ω cm and ρ1120K = 1.5 × 10–3 Ω cm and the maximum PF value PF389K = 1.08 mW/m/K2 were obtained. This work demonstrates that nanosized Ti addition together with Bi2O3 sintering aid in SPS process enhances the thermoelectric performance of Sr0.9La0.1TiO3.

UR - http://www.scopus.com/inward/record.url?scp=85082326356&partnerID=8YFLogxK

U2 - 10.1007/s10854-020-03255-4

DO - 10.1007/s10854-020-03255-4

M3 - 文章

AN - SCOPUS:85082326356

SN - 0957-4522

VL - 31

SP - 6919

EP - 6926

JO - Journal of Materials Science: Materials in Electronics

JF - Journal of Materials Science: Materials in Electronics

IS - 9

ER -

Enhanced thermoelectric properties of Sr_0.9La_0.1TiO₃ ceramics fabricated by SPS with nanosized Ti addition

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