Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
권호 표지
DOI QR코드

DOI QR Code

Effects of Various Fabrication Routes on Thermoelectric Properties of n-type Bi2Te2.85Se0.15 Alloys

제조공정에 따른 n형 Bi2Te2.85Se0.15합금의 열전성능 평가

  • Nagarjuna, C. (Division of Advanced Materials Engineering, Kongju National University) ;
  • Shin, D.W. (Division of Advanced Materials Engineering, Kongju National University) ;
  • Lee, M.W. (Division of Advanced Materials Engineering, Kongju National University) ;
  • Lee, S.H. (Korea Institute for Rare metals, korea Institute of Industrial Technology) ;
  • Hong, S.J. (Division of Advanced Materials Engineering, Kongju National University)
  • ;
  • 신동원 (공주대학교 신소재공학과) ;
  • 이명원 (공주대학교 신소재공학과) ;
  • 이상현 (한국생산기술연구원 한국희소금속산업기술센터) ;
  • 홍순직 (공주대학교 신소재공학과)
  • Received : 2018.05.10
  • Accepted : 2018.05.21
  • Published : 2018.05.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, we have fabricated n-type $Bi_2Te_{2.85}Se_{0.15}$ compounds by different processing routes such as crushing, milling and mixing respectively. Subsequently, the obtained powders were consolidated by spark plasma sintering (SPS). The phase crystallinity of bulk samples were identified using X-ray diffraction technique. Powder morphology and fracture surface of bulk samples were observed using the scanning electron microscopy (SEM). The Seebeck coefficient and electrical conductivity values were significantly increased for the milling sample than crushing and mixing samples. As a result, the maximum power factor was obtained $2.4mW/mK^2$, which is thrice than that of crushing process. The maximum figure of merit (ZT) of 0.77 was achieved at 400 K for the milling sample. Furthermore, relatively high hardness and density values were noticed for the different processed samples.

Keywords

References

  1. L. Hu, T. Zhu, X. Liu, Zhao : Adv. Funct. Mater. 24 (2014) 5211-5218. https://doi.org/10.1002/adfm.201400474
  2. J. Seo, C. Lee and K. Park : J. Mater. Sci. 35 (2000) 1549-1554. https://doi.org/10.1023/A:1004713920086
  3. S. M. Yoon, C. Nagarjuna, D. W. Shin, C. H. Lee, M. Babu, S. J. Hong, K. H. Lee : J. Korean Powder Metall. Inst. 24 (2017) 357-363. https://doi.org/10.4150/KPMI.2017.24.5.357
  4. M. K. Han, Y. Jin, D. H. Lee, S. J. Kim : Mateials. 10 (2017) 1235.
  5. J. J. Gong, A. J. Hong, J. Shuai, L. Li, Z. B. Yan, Z. F. Ren, J. M. Liu : Phys. Chem. Chem. Phys. 18 (2016) 16566-74. https://doi.org/10.1039/C6CP02057G
  6. Y. Z. Pei, X. Y. Shi, A. Lalonde, H. Wang, L. D. Chen, G. J. Snyder : Nature. 473 (2011) 66-69. https://doi.org/10.1038/nature09996
  7. L. D. Hicks, T. C. Harman, M. S. Dresselhaus : Appl. Phys. Lett. 63 (1993) 3230-3232. https://doi.org/10.1063/1.110207
  8. L. W. Molenkamp, H. V. Houten, A. A. M. staring, C. W. J. Beenakker : Nanostructures Phys. Scr. 49 (1993) 441.
  9. Y. Pei, H. wang, G. J. Snyder : Adv. Mater. 24 (2012) 6125-6135. https://doi.org/10.1002/adma.201202919
  10. Y. C. Lan, B. Poudel, Y. Ma, D. Wang, M. S. Dresselhaus, G. Chen, Z. F. Ren : Nano Lett. 9 (2009) 1419-1422. https://doi.org/10.1021/nl803235n
  11. H. J. Goldsmid : Materials: 7 (2014) 2577-2592. https://doi.org/10.3390/ma7042577
  12. B. Poudel, Q. Hao, Y. Ma, Y. Lan, A. Minnich, Bo. Yu, X. Yan, D. Wang, A. Muto, D. Vashaee, X. Chen, J. Liu, M. S. Dresselhaus, G. Chen, Z. Ren : Science. 320 (2008)
  13. D. Li, J. M. Li, J. C. Li, Y. S. Wang, J. Zhang, X. Y. Qin, Y. Cao, Y. S. Li, G. D. Tang : J. Mater. Chem. A (2018) (DOI: 10.1039/c8ta00525g).
  14. H. Lipeng, W. Haijun, Z. Tiejun, F. Chenguang, H. Jiaqing, Y. Pingjun, Z. Xinbing : Adv. Energy Mater. 5 (2015) 1500411. https://doi.org/10.1002/aenm.201500411
  15. W. S. Liu, Q. Zhang, Y. Lan, S. Chen, X. Yan, Q. Zhang, H. Wang, D. Wang, G. Chen, Z. Ren : Adv. Energy Mater. 1 (2011) 577-587. https://doi.org/10.1002/aenm.201100149
  16. L. D. Zhao, B. P. Zhang, W. S. Liu, J. F. Li : j. Appl. Phys. 78 (2009) 023704.
  17. B. Madavali, H. S. Kim, K. P. Lee, Y. Isoda, F. Gascoine, S. J. Hong : Mater. Des. 112 (2016) 485. https://doi.org/10.1016/j.matdes.2016.09.089
  18. P. Dharmaiah, H. S. Kim, C. H. Lee, S. J. Hong : J. Alloys Compd. 686 (2016) 1-8. https://doi.org/10.1016/j.jallcom.2016.05.340
  19. J. H. Bahk, A. Shakouri : Appl. Phys. Lett. 105 (2014) 052106. https://doi.org/10.1063/1.4892653
  20. C. H. Kuo, C. S. Hwang, M. S. Jeng, W. S. Sub, Y. W. Chou, J. R. Ku : J. Alloys Compd. 496 (2010) 687-690. https://doi.org/10.1016/j.jallcom.2010.02.171
  21. Y. Pan, J. F. Li : NPG Asia Materials. 8 (2016) 275. https://doi.org/10.1038/am.2016.67
  22. Z. H. Wang, T. Akao, T. Onda, Z. C. Chen : J. Alloys compds. 663 (2016) 134. https://doi.org/10.1016/j.jallcom.2015.12.122