Optimizing thermal conduction in bulk polycrystalline SrTiO3- ceramics via oxygen non-stoichiometry

被引：10

作者：

Dehkordi, Arash Mehdizadeh ^{[1
]}

Bhattacharya, Sriparna ^{[2
]}

Darroudi, Taghi ^{[3
]}

Karakaya, Mehmet ^{[2
]}

Kucera, Courtney ^{[1
,4
]}

Ballato, John ^{[1
,4
]}

Adebisi, Rasheed ^{[5
,6
]}

Gladden, Joseph R. ^{[5
,6
]}

Podila, Ramakrishna ^{[2
,4
]}

Rao, Apparao M. ^{[2
,4
]}

Alshareef, Husam N. ^{[7
]}

Tritt, Terry M. ^{[1
,8
]}

机构：

[1] Clemson Univ, Dept Mat Sci & Engn, Clemson, SC 29634 USA

[2] Clemson Univ, Clemson Nanomat Inst, Dept Phys & Astron, Clemson, SC 29634 USA

[3] Clemson Univ, Electron Microscope Facil, Clemson Res Pk, Clemson, SC 29634 USA

[4] Clemson Univ, COMSET, Clemson, SC 29634 USA

[5] Univ Mississippi, Dept Phys, Oxford, MS 38677 USA

[6] Univ Mississippi, Natl Ctr Phys Acoust, Oxford, MS 38677 USA

[7] KAUST, Mat Sci & Engn, Thuwal 239556900, Saudi Arabia

[8] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA

来源：

MRS COMMUNICATIONS | 2018年 / 8卷 / 04期

关键词：

DOPED SRTIO3; RESISTANCE; CRYSTAL; VACANCIES; GROWTH;

D O I：

10.1557/mrc.2018.220

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

While SrTiO3 exhibits promising electronic transport properties, its high thermal conductivity () is detrimental for its use as a thermoelectric material. Here, we investigate the influence of oxygen non-stoichiometry on in bulk SrTiO3 ceramics. A significant reduction in was achieved in oxygen deficient SrTiO3-, owing to the presence of oxygen vacancies that act as phonon scattering centers. Upon oxidation of SrTiO3-, the of pristine SrTiO3 was recovered, suggesting that oxygen vacancies were indeed responsible for the reduction in . Raman spectroscopy was used as an independent tool to confirm the reduction of oxygen vacancies in SrTiO3- upon oxidation.

引用

页码：1470 / 1476

页数：7

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