Thermoelectric properties of gas atomized p-type Sb2Te3–25% Bi2Te3 alloys

Crystal structure analysis and thermoelectric properties of p-type pseudo-binary (Al2Te3)x–(Bi0.5Sb1.5Te3)1−x (x=0∼0.2) alloys prepared by spark plasma sintering

“…An optimal ZT value of 0.86 is obtained for x = 0.1 at 419 K, this value is 0.28 higher than that of the ternary alloy Bi 0.5 Sb 1.5 Te 3 . Since the thermoelectric figure of merit ZT of about 1 for Bi-Te based alloys can usually be obtained near room temperature [17][18][19][20], therefore, if proper fabrication technique were employed in the present material systems, much higher thermoelectric performance would be expected than the observed alloys here simply fabricated by powder metallurgy. Using the present fabrication technique the sample of Al 2 Te 3 is very hard to prepare due to its strong brittleness and unstable in air, hence we could not so far evaluate its thermoelectric properties, which makes it difficult to directly compare the thermoelectric properties with those of the pseudo-binary alloys.…”

Sb2Te3 Nanoparticles with Enhanced Seebeck Coefficient and Low Thermal Conductivity

“…The realization of a high-efficiency thermoelectric (TE) module for solid state energy conversion requires the development of TE semiconductors with high figure of merit, which is a dimensionless factor expressed as ZT = ( S 2 σ /κ) T , where T is the temperature in kelvins, S is the Seebeck coefficient, σ is the electrical conductivity and κ is the thermal conductivity. Among all the TE semiconductors, Sb 2 Te 3 and their alloys have been extensively studied due to their promising ZT values in the temperature range of 300−500 K. − Further enhancement of ZT is expected by nanostructuring these semiconductors due to the occurrence of quantum size effect leading to the enhancement of S , and increased interface scattering of phonons to reduce the thermal conductivity. ,− …”

Investigation of the Microstructure and Thermoelectric Properties of P-Type BiSbTe Alloys by Usage of Different Revolutions Per Minute (RPM) During Mechanical Milling

“…The higher ZT values for 1100 RPM are due to the lower thermal conductivity. The present work shows the improved figure of merit (ZT = 1.07 at 300 K) than other p-type Bi-Sb based alloys by different powder metallurgy methods including gas atomization [16], melt spinning [17], and bulk mechanical alloying [18]. …”