微波热压优化分层微观结构BixSb2-xTe3合金的热电性能

Abstract
Figure/Table
References
Related Citation (3)

Download: PDF (1171 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The p-type Bi_xSb_2-xTe₃ alloys with hierarchical microstructures were prepared by mechanical alloying and a new sintering technique of microwave activated hot pressing (MAHP). The effects of Bi content on the microstructure and thermoelectric properties of Bi_xSb_2-_xTe₃ alloy were studied. The results show that there are irregular nanoparticles, which are in-situ nanostructures caused by microwave arc effect. With increasing Bi content, the electrical resistivity and Seebeck coefficient increase due to the obvious decrease of carrier concentration. At the same time, the lattice thermal conductivity increases due to the decrease in the amount of irregular nanograins. Bi_xSb_2-_xTe₃ has a maximum power factor of 3.81 mW/(m·K²) and a minimum lattice thermal conductivity of 0.33 W/(m·K), so as to obtain the maximum dimensionless figure of merit value of 1.23 at 70 ℃. The MAHP technique introduced in this work has achieved a significant improvement in the thermoelectric properties of the Bi_xSb_2-_xTe₃ alloy.

Key words： microwave hot pressing microwave arcing effect Bi_xSb_2-_xTe₃ alloy hierarchical microstructures thermoelectric property

Received: 13 December 2019 Published: 11 August 2020

ZTFLH:

TG15

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LIU Peihai
	FENG Bo
	HU Xiaoming
	LI Rusong
	ZHANG Yanglin
	FAN Xi'an

Cite this article:

LIU Peihai,FENG Bo,HU Xiaoming, et al. Thermoelectric properties of Bi_xSb_2-_xTe₃ alloy with layered microstructure optimized by microwave hot pressing[J]. Materials Science and Engineering of Powder Metallurgy, 2020, 25(3): 213-220.

URL:

http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2020/V25/I3/213

[1] XU Z J, WU H J, ZHU J, et al.Attaining high mid-temperature performance in (Bi,Sb)₂Te₃ thermoelectric materials via synergistic optimization[J]. NPG Asia Mater, 2016, 8(9): e302.
[2] TANG Z L, HU L P, ZHU T J, et al.High performance n-type bismuth telluride based alloys for mid-temperature power generation[J]. J Mater Chem C, 2015, 3(40): 10597-10603.
[3] BARAKO M T, PARK W, MARCONNET A M, et al.Thermal cycling, mechanical degradation, and the effective figure of merit of a thermoelectric module[J]. J Electron Mater, 2013, 42(3): 372-381.
[4] KIM M Y, OH T S.Thermoelectric power generation characteristics of a thin-film device consisting of electrodeposited n-Bi₂Te₃ and p-Sb₂Te₃ thin-film legs[J]. J Electron Mater, 2013, 42(9): 2752-2757.
[5] DRESSELHAUS M S, CHEN G, et al.New directions for low-dimensional thermoelectric materials[J]. Adv Mater, 2007, 19(8): 1043-1053.
[6] MINNICH A J, DRESSELHAUS M S, REN Z F, et al.Bulk nanostructured thermoelectric materials: current research and future prospects[J]. Energ Environ Sci, 2009, 2(5): 466-479.
[7] XIAO Y, YANG J Y, JIANG Q H, et al.A simultaneous increase in the ZT and the corresponding critical temperature of p-type Bi_0.4Sb_1.6Te₃ by a combined strategy of dual nanoinclusions and carrier engineering[J]. J Mater Chem A, 2014, 2(47): 20288-20294.
[8] MEHTA R J, ZHANG Y, KARTHIK C, et al.A new class of doped nanobulk high-figure-of-merit thermoelectrics by scalable bottom-up assembly[J]. Nat Mater, 2012, 11(3): 233-240.
[9] HU L P, LIU X M, XIE H H, et al.Improving thermoelectric properties of n-type bismuth-telluride-based alloys by deformation-induced lattice defects and texture enhancement[J]. Acta Mater, 2012, 60(11): 4431-4437.
[10] XIE W, HE J, KANG H J, et al.Identifying the specific nanostructures responsible for the high thermoelectric performance of (Bi,Sb)₂Te₃ nanocomposites[J]. Nano lett, 2010, 10(9): 3283-3289.
[11] JIANG Q H, YAN H X, KHALIQ J, et al.Large ZT enhancement in hot forged nanostructured p-type Bi_0.5Sb_1.5Te₃bulk alloys[J]. J Mater Chem A, 2014, 2(16): 5785-5790.
[12] OGHBAEI M, MIRZAEE O.Microwave versus conventional sintering: A review of fundamentals, advantages and applications[J]. J Alloy Compd, 2010, 41(21): 175-189.
[13] JOHNSON D L.Microwave and plasma sintering of ceramics[J]. Ceram Int, 1991, 17(5): 295-300.
[14] ROY R, AGRAWAL D, CHENG J P, et al.Full sintering of powdered-metal bodies in a microwave field[J]. Nature, 1999, 399(6737): 668-670.
[15] SAITOU K.Microwave sintering of iron, cobalt, nickel, copper and stainless steel powders[J]. Scripta Mater, 2006, 54(5), 875-879.
[16] YADOJI P, PEELAMEDU R, AGRAWAL D, et al.Microwave sintering of Ni-Zn ferrites: comparison with conventional sintering[J]. Mater Sci Eng B, 2003, 98(3): 269-278.
[17] BREVAL E, CHENG J P, AGRAWAL D K, et al.Comparison between microwave and conventional sintering of WC/Co composites[J]. Mater Sci Eng A, 2005, 391(1): 285-295.
[18] DELAIZIR G, BERNARD-GRANGER G, MONNIER, et al. A comparative study of spark plasma sintering (SPS), hot isostatic pressing (HIP) and microwaves sintering techniques on p-type Bi₂Te₃ thermoelectric properties[J]. Mater Res Bull, 2012, 47(8): 1954-1960.
[19] YANG F, FAN X A, RONG Z Z, et al.Lattice thermal conductivity reduction due to in situ-generated nano-phase in Bi_0.4Sb_1.6Te₃ alloys by microwave-activated hot pressing[J]. J Electron Mater, 2014, 43(11): 327-4334.
[20] KADHIM A, HMOOD A, HASSAN H A.Effect of Se substitution on structural and electrical transport properties of Bi_0.4Sb_1.6Se₃_xTe₃₍₁-_x) hexagonal rods[J]. J Electron Mater, 2013, 42(6): 1017-1023.
[21] DI L I, SUN, QIN R X. Improving thermoelectric properties of p-type Bi₂Te₃-based alloys by spark plasma sintering[J]. Prog Nat Sci Mater Int, 2011, 21(4): 336-340.
[22] HWANG C W, HYUN D B, HA H P, et al.Effects of excess Te on the thermoelectric properties of p-type 25% Bi₂Te₃-75% Sb₂Te₃ single crystal and hot-pressed sinter[J]. J Mater Sci, 2001, 36(13): 3291-3297.
[23] ZHAO L D, ZHANG B P, LIU W S, et al.Effect of mixed grain sizes on thermoelectric performance of Bi₂Te₃ compound[J]. J Appl Phys, 2009, 105(2): 023704.
[24] XIE W, TANG X, YAN Y, et al.Unique nanostructures and enhanced thermoelectric performance of melt-spun BiSbTe alloys[J]. Appl Phys Lett, 2009, 94(10): 139-141.
[25] JIANG C P, FAN X A, FENG B, et al.Thermal stability of p-type polycrystalline Bi₂Te₃-based bulks for the application on thermoelectric power generation[J]. J Alloys Compd, 2017, 692(1): 885-891.
[26] WANG S, XIE W, LI H, et al.High performance n-type (Bi,Sb)₂(Te,Se)₃ for low temperature thermoelectric generator[J]. J Phys D (Appl Phys), 2010, 43(33): 335404.