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- W4200613374 endingPage "1156" @default.
- W4200613374 startingPage "1143" @default.
- W4200613374 abstract "Transition metal silicides constitute a promising class of inexpensive and nontoxic thermoelectric materials showing competitive properties. This article reports an efficient process to synthesize highly textured polycrystalline CrSi2 by performing slip casting under a strong magnetic field. The crystallographic texture of spark plasma sintered samples, characterized by electron backscattered and X-ray diffraction techniques, showed a fiber texture symmetry with the c-axis of hexagonal CrSi2 aligning preferentially along the magnetic field direction. The thermoelectric properties measured both parallel and perpendicular to the c-axis texture direction showed a large anisotropy. In particular, a significantly higher Seebeck coefficient was measured, ∥c, reaching a maximum value of 200 μV K–1 at 650 K, inducing a power factor ∥c twice higher than ⊥c with an average value of 2.2 mW m–1 K–2. Density functional theory and transport property calculations revealed that an anisotropic two-band model can explain the higher thermoelectric property along the c-axis direction, which can be traced to Cr–Cr bonding interactions along this direction. The estimated thermoelectric figure of merit ZT∥c was improved to 0.20 at 773 K. This is 50% higher than that measured for randomly oriented samples and comparable to that observed for single crystals. Such a performance boost can certainly be reiterated for other types of thermoelectric materials using the efficient magnetic slip-casting process reported in this article." @default.
- W4200613374 created "2021-12-31" @default.
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- W4200613374 creator A5091576017 @default.
- W4200613374 date "2021-12-30" @default.
- W4200613374 modified "2023-09-29" @default.
- W4200613374 title "Improvement of Thermoelectric Properties via Texturation Using a Magnetic Slip Casting Process–The Illustrative Case of CrSi<sub>2</sub>" @default.
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