Thermoelectric properties of rare earth doped SrTiO3

Muta, Hiroaki; Kurosaki, Ken; Yamanaka, Shinşuke

doi:10.1016/s0925-8388(02)00972-6

Cited by 265 publications

(196 citation statements)

References 12 publications

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“…Material family References Mn oxide [49][50][51][52][53][54][55][56][57][58][59][60] ZnO, SrTiO 3 33, [61][62][63][64][65][66][67][68][69][70][71][72] Co oxide 34,35,[73][74][75][76][77] other oxide 28,63,[78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93][94][95][96] Si-Ge …”

Section: Acknowledgementmentioning

confidence: 99%

Data-Driven Review of Thermoelectric Materials: Performance and Resource Considerations

et al. 2013

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In this review, we describe the creation of a large database of thermoelectric materials prepared by abstracting information from over 100 publications. The database has over 18 000 data points from multiple classes of compounds, whose relevant properties have been measured at several temperatures. Appropriate visualization of the data immediately allows certain insights to be gained with regard to the property space of plausible thermoelectric materials. Of particular note is that any candidate material needs to display an electrical resistivity value that is close to 1 mW cm at 300 K, i.e., samples should be significantly more conductive than the Mott minimum metallic conductivity. The Herfindahl-Hirschman index, a commonly accepted measure of market concentration, has been calculated from geological data (known elemental reserves) and geopolitical data (elemental production) for much of the periodic table. The visualization strategy employed here allows rapid sorting of thermoelectric compositions with respect to important issues of elemental scarcity and supply risk.

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Section: Acknowledgementmentioning

confidence: 99%

Data-Driven Review of Thermoelectric Materials: Performance and Resource Considerations

et al. 2013

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“…In particular, addition of lanthanum or niobium proportionally increases the carrier concentration (n), resulting in higher electrical conductivity (r) and lower Seebeck coefficient (a). [14][15][16][17][18][19][20] Still, this leads to a general improvement of the power factor (ra 2 ). At low dopant content, the thermal conductivities of both SrTi(Nb)O 3 and Sr(La)TiO 3 were found to be almost independent on the carrier concentration.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, a comparison of several lanthanide (Ln) dopants (Y, La, Sm, Gd, Dy) has shown that the thermoelectric performance of Sr 0.9 Ln 0.1 TiO 3 , described by dimensionless figure of merit ZT (ra 2 Â T/j), is mainly influenced by the changes in thermal conductivity, whilst electrical conductivity and Seebeck coefficient are almost independent on the type of Ln cation. 20 Representative ZT values for bulk polycrystalline thermoelectric oxides are 0. 22 improving ZT must rely on alternative ways such as microand nanostructural approaches.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of thermoelectric performance in strontium titanate by praseodymium substitution

Kovalevsky

Yaremchenko

Populoh

et al. 2013

Journal of Applied Physics

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In order to identify the effects of Pr additions on thermoelectric properties of strontium titanate, crystal structure, electrical and thermal conductivity, and Seebeck coefficient of Sr1−xPrxTiO3 (x = 0.02–0.30) materials were studied at 400 < T < 1180 K under highly reducing atmosphere. The mechanism of electronic transport was found to be similar up to 10% of praseodymium content, where generation of the charge carriers upon substitution resulted in significant increase of the electrical conductivity, moderate decrease in Seebeck coefficient, and general improvement of the power factor. Formation of point defects in the course of substitution led to suppression of the lattice thermal conductivity, whilst the contribution from electronic component was increasing with carrier concentration. Possible formation of layered structures and growing distortion of the perovskite lattice resulted in relatively low thermoelectric performance for Sr0.80Pr0.20TiO3 and Sr0.70Pr0.30TiO3. The maximum dimensionless figure of merit was observed for Sr0.90Pr0.10TiO3 and amounted to ∼0.23 at 670 K and ∼0.34 at 1170 K, close to the values, obtained in similar conditions for the best bulk thermoelectrics, based on rare-earth substituted SrTiO3.

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“…Muta et al 15 reported the thermoelectric properties of SrTiO 3 doped by several lanthanide elements, and found that Dy-doped samples present the highest thermoelectric performance (ZT % 0.22). However, those samples were prepared by conventional SSR method, and the densities were relatively low.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Properties of Dy-Doped SrTiO3 Ceramics

Liu

Wang

Peng

et al. 2012

Journal of Elec Materi

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Sr 1Àx Dy x TiO 3 (x = 0.02, 0.05, 0.10) ceramics were prepared by the reduced solid-state reaction method, and their thermoelectric properties were investigated from room temperature to 973 K. The resistivity increases with temperature, showing metallic behavior. The Seebeck coefficients tend to saturate at high temperatures, presenting narrow-band behavior, as proved by ab initio calculations of the electronic structure. The magnitudes of the Seebeck coefficient and the electrical resistivity decrease with increasing Dy content. At the same time, the thermal conductivity decreases because the lattice thermal conductivity is reduced by Dy substitution. The maximum value of the figure of merit reaches 0.25 at 973 K for the Sr 0.9 Dy 0.1 TiO 3 sample.

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Thermoelectric properties of rare earth doped SrTiO3

Cited by 265 publications

References 12 publications

Data-Driven Review of Thermoelectric Materials: Performance and Resource Considerations

Data-Driven Review of Thermoelectric Materials: Performance and Resource Considerations

Enhancement of thermoelectric performance in strontium titanate by praseodymium substitution

Thermoelectric Properties of Dy-Doped SrTiO3 Ceramics

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