Effect of sintering temperature on the thermoelectric properties of pulse discharge sintered (Bi0.24Sb0.76)2Te3 alloy

Enhanced thermoelectric performance in spark plasma textured bulk n-type BiTe2.7Se0.3 and p-type Bi0.5Sb1.5Te3

“…10,11 SPS can significantly change the obtained microstructure of the sintered compact leading to changes in the thermoelectric performance. 12 For bismuth telluride based materials, the use of spark plasma sintering has been reported by many authors with better thermoelectric properties. [12][13][14][15] Preferential orientation in the direction parallel to the pressure direction has been reported by Euvananont et al using SPS technique.…”

“…12 For bismuth telluride based materials, the use of spark plasma sintering has been reported by many authors with better thermoelectric properties. [12][13][14][15] Preferential orientation in the direction parallel to the pressure direction has been reported by Euvananont et al using SPS technique. 16 Such a texture development is expected to introduce significant anisotropy leading to changes in the electrical and thermal properties.…”

Microstructure and thermoelectric properties of n-type Bi2Te2.85Se0.15 prepared by mechanical alloying and plasma activated sintering

“…The particles with basal planes bonded by Van der Waals force would rotate perpendicular to pressing direction. Furthermore, the pulse current induced a high electric field in samples and might promote the preferential orientation [15]. The orientation degree of the (0 0 l) planes can be determined by the orientation factor F, which can be calculated using Lotgering method [19]: …”

“…Plasma generates due to discharge between powders, the surface of powders is activated and purified, a self-heating phenomenon is achieved between the particles, heat-and mass-transfer can be completed instantaneously [13]. Therefore, it can obtain materials with very fine microstructure and high density at a relatively lower sintering temperature in a very short time [14][15][16].…”

Thermoelectric Properties of Spark Plasma Sintering Synthesized (Bi,Sb)2Te3 Based Bulk Thermoelectric Materia

“…Это, в свою очередь, связано с тем, что энергия образования антиструктурного дефекта Sb Te [5]. В этих образцах при комнатной температуре на-блюдали увеличение σ с возрастанием температуры спекания до 500 °С, а значение κ имело максимум при температуре спекания 400 °С.…”