Improved Thermoelectric Properties of Bi-M-Co-O (M = Sr, Ca) Misfit Compounds by Laser Directional Solidification

Processing effects on the thermoelectric properties of Bi₂Ca₂Co_1.7O_x ceramics

“…1b and c). This effect is due to the growth of the thermoelectric grains along the ab planes which are much larger for samples textured by the LFZ technique, as reported in previous works [27]. As a consequence, these plate-like grains are preferentially oriented with their ab plane parallel to the sample holder when powdered samples are prepared for the XRD characterization.…”

Enhancement of the high-temperature thermoelectric performance of Bi2Ba2Co2Ox ceramics

“…For this reason, the alignment of their plate-like grains is essential to attain macroscopic properties comparable to those obtained on single crystals. Some methods have been shown to be adequate to obtain a good grain orientation in oxide ceramics, as template grain growth (TGG) [11], sinter forging [12], spark plasma sintering [13], or directional growth from the melt [14].…”

New promising Co-free thermoelectric ceramic based on Ba–Fe–oxide

“…Evidently, more research work must be performed in this system in order to decrease these high resistivity values, as for example by doping or using different preparation methods, which have been already reported to improve thermoelectric properties in other thermoelectric ceramic systems [8,26,27]. cobaltites [28,29]. On the other hand, these values can be considered as relatively low, when taking into account the measured resistivity.…”