High thermoelectric performance of niobium-doped strontium titanate bulk material affected by all-scale grain boundary and inclusions

Jun Wang; Xinxin Ye; Xinba Yaer; Boyu Zhang; Wen Ma; Lei Miao

doi:10.1016/j.scriptamat.2014.11.018

High thermoelectric performance of niobium-doped strontium titanate bulk material affected by all-scale grain boundary and inclusions

Jun Wang, Xinxin Ye, Xinba Yaer, Boyu Zhang, Wen Ma, Lei Miao

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

29 Citations (Scopus)

Abstract

The large thermal conductivity of SrTiO₃ bulk material limits its potential application for high-temperature thermoelectricity. The effects of all-scale grain boundaries and inclusions on the thermoelectric performance of Nb-doped bulk SrTiO₃ materials are investigated in this study. Nano- to microscale grain boundaries and inclusions reduce the thermal conductivity by 30%. As a result, the ZT value is enhanced 2.6 times by a combination of all-sized crystals, energy filtering effect, multilevel scattering behaviors of nano/microscale grain boundaries and inclusions.

Original language	English
Pages (from-to)	25-28
Number of pages	4
Journal	Scripta Materialia
Volume	99
DOIs	https://doi.org/10.1016/j.scriptamat.2014.11.018
Publication status	Published - 2015 Apr 1
Externally published	Yes

Keywords

All-scale grain boundary
Molten salt synthesis
Niobium-doped strontium titanate
Thermoelectric

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2014.11.018

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title = "High thermoelectric performance of niobium-doped strontium titanate bulk material affected by all-scale grain boundary and inclusions",

abstract = "The large thermal conductivity of SrTiO3 bulk material limits its potential application for high-temperature thermoelectricity. The effects of all-scale grain boundaries and inclusions on the thermoelectric performance of Nb-doped bulk SrTiO3 materials are investigated in this study. Nano- to microscale grain boundaries and inclusions reduce the thermal conductivity by 30%. As a result, the ZT value is enhanced 2.6 times by a combination of all-sized crystals, energy filtering effect, multilevel scattering behaviors of nano/microscale grain boundaries and inclusions.",

keywords = "All-scale grain boundary, Molten salt synthesis, Niobium-doped strontium titanate, Thermoelectric",

author = "Jun Wang and Xinxin Ye and Xinba Yaer and Boyu Zhang and Wen Ma and Lei Miao",

note = "Funding Information: This work is partially supported by Science Research Grant for Inner Mongolia Higher Educational Institute to J.W . ( NJZY12065 ) and open fund of Key Laboratory for Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences (GIEC) ( y407k61001 ). The authors also appreciate Prof. N. Ishizawa (Nagoya Institute of Technology, Japan) for his experimental assistance. Publisher Copyright: {\textcopyright} 2014 Acta Materialia Inc. All rights reserved.",

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doi = "10.1016/j.scriptamat.2014.11.018",

language = "English",

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TY - JOUR

T1 - High thermoelectric performance of niobium-doped strontium titanate bulk material affected by all-scale grain boundary and inclusions

AU - Wang, Jun

AU - Ye, Xinxin

AU - Yaer, Xinba

AU - Zhang, Boyu

AU - Ma, Wen

AU - Miao, Lei

N1 - Funding Information: This work is partially supported by Science Research Grant for Inner Mongolia Higher Educational Institute to J.W . ( NJZY12065 ) and open fund of Key Laboratory for Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences (GIEC) ( y407k61001 ). The authors also appreciate Prof. N. Ishizawa (Nagoya Institute of Technology, Japan) for his experimental assistance. Publisher Copyright: © 2014 Acta Materialia Inc. All rights reserved.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - The large thermal conductivity of SrTiO3 bulk material limits its potential application for high-temperature thermoelectricity. The effects of all-scale grain boundaries and inclusions on the thermoelectric performance of Nb-doped bulk SrTiO3 materials are investigated in this study. Nano- to microscale grain boundaries and inclusions reduce the thermal conductivity by 30%. As a result, the ZT value is enhanced 2.6 times by a combination of all-sized crystals, energy filtering effect, multilevel scattering behaviors of nano/microscale grain boundaries and inclusions.

AB - The large thermal conductivity of SrTiO3 bulk material limits its potential application for high-temperature thermoelectricity. The effects of all-scale grain boundaries and inclusions on the thermoelectric performance of Nb-doped bulk SrTiO3 materials are investigated in this study. Nano- to microscale grain boundaries and inclusions reduce the thermal conductivity by 30%. As a result, the ZT value is enhanced 2.6 times by a combination of all-sized crystals, energy filtering effect, multilevel scattering behaviors of nano/microscale grain boundaries and inclusions.

KW - All-scale grain boundary

KW - Molten salt synthesis

KW - Niobium-doped strontium titanate

KW - Thermoelectric

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VL - 99

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JO - Scripta Materialia

JF - Scripta Materialia

ER -

High thermoelectric performance of niobium-doped strontium titanate bulk material affected by all-scale grain boundary and inclusions

Abstract

Keywords

ASJC Scopus subject areas

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