The effects of elements doping on transport and thermoelectric properties of Sr3Ti2O7

Sun, Rui; Qin, Xiaoying; Li, L.L.; Li, D.; Zhang, J.; Zhang, Y.S.; Tang, Chunjuan

doi:10.1016/j.jpcs.2014.01.002

Cited by 17 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The electrical resistivity of SrTiO 3 as a function of temperature is shown in the figure 10. From the figure 10, all the samples show a metallic behaviour, as there is an increase in temperature [29]. The overall resistivity of the hydrothermal samples (ST3 and ST4) were relatively decreased compared to the sample prepared by chemical precipitation method (ST1) possibly due to high crystalline nature of the samples as evidenced from XRD ( figure 3).…”

Section: Electrical Resistivity As a Function Of Temperature In Srtiomentioning

confidence: 91%

Enhancement of thermoelectric power factor of hydrothermally synthesised SrTiO₃ nanostructures

Devi

Rajasekaran

Vijayakumar

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

Strontium Titanate (SrTiO 3 ) nanoparticles were synthesised by varying the hydrothermal growth period as 12, 24 and 48 h. The crystal structure, morphology, functional groups and elemental composition of the prepared SrTiO 3 nanoparticles were studied using XRD, FESEM, Raman and XPS, respectively. XRD analysis shows that the intensity of the diffraction peaks of SrTiO 3 increased with growth period due to high crystallinity of the hydrothermally grown samples. From the FESEM images, it was observed that the morphology of SrTiO 3 was changed from spherical to cubic when the hydrothermal growth period increased from 12 to 24 h. The different modes of vibration of samples were studied using Raman spectroscopy. XPS substantiate the composition and binding states of each element in the sample. The Seebeck coefficient and electrical resistivity of the prepared SrTiO 3 nanostructures were measured at various temperatures by pelletizing the samples. The Seebeck coefficient of the sample gradually increased with hydrothermal growth period. The electrical resistivity of the sample relatively decreased with growth period. The power factor of the samples was calculated from the obtained Seebeck coefficient and electrical resistivity. A power factor of the sample prepared at 24 h of hydrothermal growth (2.191×10 −4 W.m −1 .K −2 at 550 K) was two order higher than that of as prepared sample (0.012×10 −4 W.m −1 .K −2 at 550 K). The experimental results revealed that the increase in hydrothermal growth period has a potential effect on the morphology. The cubic morphology with high crystalline nature facilitated the electron transport thereby thermoelectric power factor was enhanced in SrTiO 3 nanostructures.

show abstract

Section: Electrical Resistivity As a Function Of Temperature In Srtiomentioning

confidence: 91%

Enhancement of thermoelectric power factor of hydrothermally synthesised SrTiO₃ nanostructures

Devi

Rajasekaran

Vijayakumar

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…It has been found that RE element doping at Ca sites of CaMnO 3 is an effective way to increase σ while keeping a moderate absolute S [ 6 , 12 ]. Studies of the effects of various RE 3+ ions doping at Sr sites of (Sr 0.95 RE 0.05 ) 3 Ti 2 O 7 oxides on their TE properties indicated that the maximum ZT was obtained in Gd-doped (Sr 0.95 Gd 0.05 ) 3 Ti 2 O 7 mainly owing to its lower κ [ 13 ] or enhanced S [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Structural and Thermoelectric Properties of Gd2−2xSr1+2xMn2O7 Double-Layered Manganites

Qin

Pang

et al. 2023

Materials

View full text Add to dashboard Cite

Double-layered manganites are natural superlattices with low thermal conductivity, which is of importance for potential thermoelectric applications. The Gd2−2xSr1+2xMn2O7 (x = 0.5; 0.625; 0.75) were prepared by the solid-state reaction method. All the samples crystallize in the tetragonal I4/mmm Sr3Ti2O7 type structure. The unit cell volume and the distortion in the MnO6 octahedra increase with increasing Gd content. Their thermoelectric properties were investigated between 300 and 1200 K. All exhibit an n-type semiconducting behavior. The electrical conductivity (σ) increases while the absolute value of the Seebeck coefficient (|S|) decreases with increasing Gd content. Simultaneous increases in σ and |S| with increasing temperature are observed at temperatures approximately higher than 600 K, and the power factor reaches a maximum value of 18.36 μW/(m K²) for x = 0.75 at 1200 K. The thermal conductivity (κ) is lower than 2 W/(m K) over the temperature range of 300–1000 K for all the samples and a maximum dimensionless figure of merit ZT of 0.01 is obtained for x = 0.75 at 1000 K.

show abstract

“…Yan et al [11] obtained and investigated the Ruddlesden-Popper sulfides both in orthorhombic phase and tetragonal phase with a new synthetic method. Sun et al [12] experimentally investigated the transport and thermodynamic properties of R-P compounds at different temperatures. Wang et al [13] examined the electronic band structures and density of states of orthorhombic CZS and SZS compounds using the first principle method.…”

Section: Introductionmentioning

confidence: 99%

Strain effects and electronic structures of narrow band P-R ferroelectrics: First principles calculation

et al. 2019

View full text Add to dashboard Cite

In the present work, the structural, mechanical, electronic and optical properties of the Ruddlesden-Popper(RP) Ba 3 X 2 S 7 (X ¼ Zr, Hf, Ti) sulfides compounds have been investigated by means of first principles calculations. The generalized gradiend approximation has been used for modeling exchange-correlation effects. It has been observed that the calculated lattice parameters are in good agreement with the experimental values. Bulk modulus, shear modulus, Young's modulus Poisson's ratio, and Poisson's ratio from the calculated elastic constants for Ba 3 Zr 2 S 7 , Ba 3 Hf 2 S 7 , and Ba 3 Ti 2 S 7 compounds, respectively have been obtained. The obtained electronic band structure for Ba 3 Zr 2 S 7 and Ba 3 Hf 2 S 7 compounds are semiconductor in nature, and the Ba 3 Ti 2 S 7 compound also is metallic. Based on the obtained electronic structures, we further calculated the frequency-dependent dielectric function and other optical functions along the x-and z-axes. ARTICLE HISTORY

show abstract

The effects of elements doping on transport and thermoelectric properties of Sr3Ti2O7

Cited by 17 publications

References 25 publications

Enhancement of thermoelectric power factor of hydrothermally synthesised SrTiO₃ nanostructures

Enhancement of thermoelectric power factor of hydrothermally synthesised SrTiO₃ nanostructures

Structural and Thermoelectric Properties of Gd2−2xSr1+2xMn2O7 Double-Layered Manganites

Strain effects and electronic structures of narrow band P-R ferroelectrics: First principles calculation

Contact Info

Product

Resources

About

The effects of elements doping on transport and thermoelectric properties of Sr3Ti2O7

Cited by 17 publications

References 25 publications

Enhancement of thermoelectric power factor of hydrothermally synthesised SrTiO3 nanostructures

Enhancement of thermoelectric power factor of hydrothermally synthesised SrTiO3 nanostructures

Structural and Thermoelectric Properties of Gd2−2xSr1+2xMn2O7 Double-Layered Manganites

Strain effects and electronic structures of narrow band P-R ferroelectrics: First principles calculation

Contact Info

Product

Resources

About

Enhancement of thermoelectric power factor of hydrothermally synthesised SrTiO₃ nanostructures

Enhancement of thermoelectric power factor of hydrothermally synthesised SrTiO₃ nanostructures