A hybrid method for the synthesis of small Bi0.5Sb1.5Te3 alloy particles
Source abstract
Abstract
Abstract A reduction in the grain size of p-type thermoelectric materials, which increases phonon scattering at grain boundaries, can increase the figure of merit ( ZT) due to decreased lattice thermal conductivity. Small grains are often observed in samples sintered from small powders. In this study, we investigated the effect of a reduction in powder size in Bi 0.5 Sb 1.5 Te 3 alloys synthesized using a new hybrid method. Tellurium (Te) nanowires were chemically synthesized without an organic surfactant and Bi 0.25 Sb 0.75 powders were physically synthesized using a ball-milling method. The Bi 0.5 Sb 1.5 Te 3 powders synthesized from the previously prepared Te nanowires and Bi 0.25 Sb 0.75 powder were thermally alloyed by a solid state reaction. The morphology of the Te was found to be important in determining the powder size of the alloyed Bi 0.5 Sb 1.5 Te 3 . Reduced thermal conductivity was associated with smaller grain size, which enhanced thermoelectric properties.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Thermal properties of materials · Thermal Radiation and Cooling Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (37)
Show source-provided references
1. Thermoelectric cooling and power generation10.1126/science.285.5428.703 ↗
2. Smaller is cooler10.1126/science.1069895 ↗
3. Cooling, heating, generating power, and recovering waste heat with thermoelectric systems10.1126/science.1158899 ↗
4. Nolas · 2001
5. Rowe · 2005
6. High-thermoelectric performance of nanostructured bismuth antimony telluride bulk alloys10.1126/science.1156446 ↗
7. Bulk nanostructured thermoelectric materials: current research and future prospects10.1039/b822664b ↗
8. Enhancement of thermoelectric figure-of-merit by a bulk nanostructuring approach10.1002/adfm.200901512 ↗
9. High-performance nanostructured thermoelectric materials10.1038/asiamat.2010.138 ↗
10. Effect of ball milling time on the thermoelectric properties of p-type (Bi,Sb)2Te310.1016/j.jallcom.2013.03.062 ↗
11. Mechanical alloying and milling10.1016/S0079-6425(99)00010-9 ↗
12. Chemical synthesis of anisotropic nanocrystalline Sb2Te3 and low thermal conductivity of the compacted dense bulk10.1166/jnn.2008.062 ↗
13. Cu2ZnGeSe4 nanocrystals: synthesis and thermoelectric properties10.1021/ja211952z ↗
14. Chemical synthesis of Bi0.5Sb1.5Te3 nanocrystals and their surface oxidation properties10.1021/am900148d ↗
15. Synthesis and thermoelectric characterization of Bi2Te3 nanoparticles10.1002/adfm.200901261 ↗
16. Improving thermoelectric properties of chemically synthesized Bi2Te3-Based nanocrystals by annealing10.1021/jp102816x ↗
17. Effect of sintering on the thermoelectric transport properties of bulk nanostructured Bi0.5Sb1.5Te3 pellets prepared by chemical synthesis10.1007/s11664-012-1998-5 ↗
18. Chemical transformations in ultrathin chalcogenide nanowires10.1021/nn9018575 ↗
19. Rational synthesis of ultrathin n-type Bi2Te3 nanowires with enhanced thermoelectric properties10.1021/nl202935k ↗
20. Uniform silver nanowires synthesis by reducing AgNO3 with ethylene glycol in the presence of seeds and poly(vinyl pyrrolidone)10.1021/cm020587b ↗
21. Ethylene glycol-mediated synthesis of metal oxide nanowires10.1039/b313938g ↗
22. Heat capacity of the n-Bi2Te2.88Se0.12 and p-Bi0.52Sb1.48Te3 solid solutions10.1134/S0020168508100051 ↗
23. Method of efficient Ag doping for Fermi level tuning of thermoelectric Bi0.5Sb1.5Te3 alloys using a chemical displacement reaction10.1021/acs.jpcc.5b04175 ↗
24. Thermodynamic evaluation of the system bismuth-antimony10.1016/0364-5916(92)90001-E ↗
25. Effect of starting materials on the properties of solid-state reacted barium titanate powder
26. Suryanarayana · 1998
27. Callister · 2006
28. Structure study of bulk nanograined thermoelectric bismuth antimony telluride10.1021/nl803235n ↗
29. Estimation of the thermal band gap of a semiconductor from seebeck measurements10.1007/s11664-999-0211-y ↗
30. Enhancement of thermoelectric properties of Mg2Si compounds with Bi doping through carrier concentration tuning10.1007/s13391-014-4148-9 ↗
31. Thermoelectric performance of lanthanum telluride produced via mechanical alloying10.1103/PhysRevB.78.125205 ↗
32. Control of thermoelectric properties through the addition of Ag in the Bi0.5Sb1.5Te3 Alloy10.3365/eml.2010.12.201 ↗
33. Complex thermoelectric materials10.1038/nmat2090 ↗
34. Effect of Ag or Sb addition on the thermoelectric properties of PbTe10.1063/1.3517088 ↗
35. Evaluation of anisotropic thermoelectric power of ReSi1.7510.1016/j.physb.2006.07.018 ↗
36. A new class of doped nanobulk high-figure-of-merit thermoelectrics by scalable bottom-up assembly10.1038/nmat3213 ↗
37. ZT enhancement in solution-grown Sb(2−x)BixTe3 nanoplatelets10.1021/nn1008963 ↗