التفاصيل البيبلوغرافية
| العنوان: |
Enhanced Thermoelectric and Mechanical Properties of BaO-Doped BiCuSeO δ Ceramics |
| المؤلفون: |
Tian-Yu Yang (3723271), Lulu Huang (469776), Jun Guo (85069), Yixin Zhang (173038), Jing Feng (177843), Zhen-Hua Ge (1850350) |
| سنة النشر: |
1753 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Biochemistry, Medicine, Genetics, Neuroscience, Biotechnology, Mental Health, Infectious Diseases, Space Science, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, state reactions integrated, spark plasma sintering, ultralow thermal conductivity, lattice thermal conductivity, δ , 825 , 175 , enhanced phonon scattering, maximum zt value, 3 +, 323 k owing, ceramics layered bicuseo, electrical conductivity, 323 k, highly enhanced, undoped bicuseo, toxic elements, secondary phase, result shows |
| الوصف: |
Layered BiCuSeO δ ceramics with earth-abundant and non-toxic elements can invariably be prospective thermoelectric (TE) materials attributed to their ultralow thermal conductivity with controllable electrical transport properties. In this study, BaO was used as the dopant of p-type to improve the TE properties of BiCuSeO δ ceramics prepared through solid-state reactions integrated with the technique of spark plasma sintering. The effects of Ba doping on the thermoelectric and mechanical properties of BiCuSeO δ ceramics were studied at great length. The result shows that the electrical conductivity was optimized to a value of 241 S cm –1 for the Bi 0.825 Ba 0.175 CuSeO δ sample due to the Ba 2+ -ion substitution on Bi 3+ sites and the introduction of extra holes. The power factor of the Bi 0.825 Ba 0.175 CuSeO δ sample was highly enhanced to 765 μWm –1 K –2 at 323 K owing to its notably increased electrical conductivity. Simultaneously, the lattice thermal conductivity of the Bi 0.825 Ba 0.175 CuSeO δ sample decreased from 0.64 Wm –1 K –1 at 323 K to 0.41 Wm –1 K –1 at 873 K, which is ascribed to enhanced phonon scattering through the point defects and a secondary phase. Accordingly, a maximum ZT value of 0.85 was achieved for the Bi 0.825 Ba 0.175 CuSeO δ sample at 873 K, which is approximately 3 times higher than that obtained for the undoped BiCuSeO δ ceramic. The hardness of the BiCuSeO δ ceramics was measured for the first time by using the nanoindentation method. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| العلاقة: |
https://figshare.com/articles/journal_contribution/Enhanced_Thermoelectric_and_Mechanical_Properties_of_BaO-Doped_BiCuSeO_sub_sub_Ceramics/16941268Test |
| DOI: |
10.1021/acsaem.1c02720.s001 |
| الإتاحة: |
https://doi.org/10.1021/acsaem.1c02720.s001Test |
| حقوق: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.FEF6DCCB |
| قاعدة البيانات: |
BASE |
