Ca和/或Mn取代对SrTiO3热电性能的影响

IF 0.9 4区物理与天体物理 Q4 PHYSICS, APPLIED

European Physical Journal-applied Physics Pub Date : 2021-03-01 DOI:10.1051/EPJAP/2021200297

D. M. Radheep

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引用次数: 1

摘要

研究了固相反应法制备的Sr0.5 Ca0.5 Ti1-x Mnx O3 (x = 0.25, 0.5, 0.75)和Sr0.75 Ca0.25 Ti0.75 Mn0.25 O3钙钛矿多晶样品的热电性能。随后测量了导热系数、电阻率、塞贝克系数、功率因数和优值图(ZT)等物理性能。在室温下，Ca2+取代Sr2+位或/和混合价Mn取代Ti位使热电性能明显增强，ZT从0.5增加到0.69。所研究的样品在室温附近ZT富集的原因是立方晶格中取代引起的畸变。

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Effect of Ca and/or Mn substitution on thermoelectric properties of SrTiO3

Thermoelectric properties have been investigated for Sr0.5 Ca0.5 Ti1-x Mnx O3 (x = 0.25, 0.5, 0.75) and Sr0.75 Ca0.25 Ti0.75 Mn0.25 O3 perovskite polycrystalline samples synthesized by solid-state reaction method. Following physical properties such as thermal conductivity, electrical resistivity, Seebeck coefficient, power factor and figure of merit (ZT) were measured. The substitution of Ca2+ in Sr2+ site or/and mixed valence Mn in Ti site creates appreciable enhancement in the thermoelectric properties with an increase of ZT from 0.5 to 0.69 at room temperature. The origin for the enrichment of ZT of the investigated samples around room temperature is due to substitution induced distortion in the cubic lattice.

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来源期刊

European Physical Journal-applied Physics 物理-物理：应用

CiteScore

1.90

自引率

10.00%

发文量

审稿时长

1.9 months

期刊介绍： EPJ AP an international journal devoted to the promotion of the recent progresses in all fields of applied physics. The articles published in EPJ AP span the whole spectrum of applied physics research.