Thermoelectric properties of n-type 95%Bi2Te3–5%Bi2Se3 materials fabricated by magnetic pulsed compaction (MPC)

Effect of Sintering Temperature on Thermoelectric Properties of p‐Bi2Te3 Alloys Produced by Gas Atomization

“…The intensities of the XRD pattern of basal planes from the hot‐pressing bulks are higher than that of initial (GA) powder. The intensity of (006), (009), (0015), and (0018) planes, which are reflections from the basal planes of hot‐pressed bulks, was slightly strong . This indicates that, with increasing hot‐pressing temperature, the preferred orientation was increased due to the ease of deformation during the hot pressing.…”

“…This indicates that, with increasing hot‐pressing temperature, the preferred orientation was increased due to the ease of deformation during the hot pressing. In general, the orientation factor is calculated from the Lotgering method and has been reported in previous works . The orientation factor values were calculated to be 0.0781, 0.1102, and 0.1208 for the samples hot pressed at 380°C, 420°C, and 460°C, respectively.…”

“…The resulting cleavage along the c‐plane is a major reason for the weak mechanical strength of the single crystals. To enhance their mechanical as well as TE properties, powder metallurgy methods such as gas atomization, ball milling, melt spinning, hot pressing, and spark plasma sintering have been applied to prepare polycrystalline Bi 2 Te 3 alloys. Among all of these methods, gas atomization (GA) is one of the excellent powder fabrication techniques.…”

“…Among all of these methods, gas atomization (GA) is one of the excellent powder fabrication techniques. Relative to other manufacturing process, it provides efficient and high packing of powder, a mass production rate, and homogenous productivity without any segregation . Hot pressing provides high bulk densification resulting in a fine grain microstructure that leads to both improved mechanical and thermoelectric properties …”

Enhanced thermoelectric performance in n -type Bi 2 Te 2.95 Se 0.05 bulks fabricated by high pressure sintering technique

“…Much effort has been made to improve the ZT values of n-type Bi 2 Te 3 -based alloys, such as through doping [20], using low-dimensional materials [21] and so on. Meanwhile, some new preparation methods have been developed, such as the gas atomization process, and this method are subsequently consolidated by magnetic pulsed compaction (MPC) technique [22]. In recent years, significant progress had been made in improving the characteristics of n-type Bi 2 Te 3 -based alloys.…”