Economical Route to Produce High Seebeck Coefficient Calcium Cobaltate for Bulk Thermoelectric Applications

Abstract

Phase pure calcium cobaltate (Ca 1.24 Co 1.62 O 3.86 ) was prepared by Self-propagating High-temperature Synthesis (SHS) followed by a short post heat treatment. Prepared powders were characterized by XRD for phase purity, and SEM for particle size, and distribution. Temperature histories at the center and on the surface of reaction pellet during the SHS process were monitored and recorded. Particle size of synthesized powders was reduced using a planetary mill to increase its specific surface area. Electrical conductivity, thermal conductivity, and Seebeck coefficient of the prepared power were measured and figure of merit was reported.

Enhanced thermoelectric properties in Pb-doped BiCuSeO oxyselenides prepared by ultrafast synthesis

“…[35][36][37][38][39][40] Herein, we report the successful synthesis of BiCuSeO via SHS, and in order to confirm the compatibility of SHS method for doped BiCuSeO systems, Pb was doped 5 at Bi site, which has been reported as a promising dopant in BiCuSeO. [35][36][37][38][39][40] Herein, we report the successful synthesis of BiCuSeO via SHS, and in order to confirm the compatibility of SHS method for doped BiCuSeO systems, Pb was doped 5 at Bi site, which has been reported as a promising dopant in BiCuSeO.…”

“…A number of materials have been successfully synthesized by this method. [35][36][37][38][39][40] Herein, we report the successful synthesis of BiCuSeO via SHS, and in order to conrm the compatibility of SHS method for doped BiCuSeO systems, Pb was doped at Bi site, which has been reported as a promising dopant in BiCuSeO. 20 The Debye-Callaway model was employed in order to understand the thermal transport mechanism in pristine and Pb-doped BiCu-SeO samples.…”

Anisotropy of the thermoelectric figure of merit (ZT) in textured Ca3Co4O9 ceramics prepared by using a spark plasma sintering process

“…The values of C p were cited from Ref. [17], and the relative bulk density was obtained by means of the Archimedes' principle. Figure 1 shows a scheme for the in-plane and the outof-plane directions used in this study.…”