WFRF:(Zhou Hongwei)
Sökning: WFRF:(Zhou Hongwei) > (2020-2024) > Microwave synthesis...
- Lei, YingAnhui University of Technology, CHN (författare)
Microwave synthesis and enhancement of thermoelectric performance in HfxTi1−xNiSn0.97Sb0.03 half-Heusler bulks
- Artikel/kapitelEngelska2023
Förlag, utgivningsår, omfång ...
- 2019-08-19
- Springer Nature,2023
- printrdacarrier
Nummerbeteckningar
- LIBRIS-ID:oai:DiVA.org:bth-18641
- https://urn.kb.se/resolve?urn=urn:nbn:se:bth-18641URI
- https://doi.org/10.1007/s12598-019-01290-7DOI
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- Språk:engelska
- Sammanfattning på:engelska
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- We obtained TiNiSn-based half-Heusler HfxTi1−xNiSn0.97Sb0.03 bulks with 85%–96% relative densities via 5-min microwave synthesis and 20-min microwave sintering in sealed vacuum. The phase composition and microstructure of samples were characterized by X-ray diffractometer (XRD) and scanning electron microscopy (SEM). Thermoelectric (TE) properties were measured, i.e., Seebeck coefficient (S), electrical resistivity (ρ), and thermal conductivity (κ) through Seebeck coefficient/resistance analysis system (S/RAs) and laser flash thermal analyzer (LFT). The results show that the nearly single phase exists after microwave sintering. The grain sizes and the number of grain boundaries decrease with increase in Hf-doping amount due to an increase in point defects. The matrix grains for Hf0.1Ti0.9NiSn0.97Sb0.03 are ~ 10 μm. The nanoscle pores and precipitates are present as second phases in matrix grain. The real composition for Hf0.1Ti0.9NiSn0.97Sb0.03 matrix grain is Hf3.51Ti28.76Ni34.76Sn31.55Sb1.43. The variation trends of electrical resistivity, Seebeck coefficient, power factor, and thermal conductivity were analyzed in detail. The maximum figure of merit (ZT) of 0.46 is obtained for Hf0.1Ti0.9NiSnSn0.97Sb0.03 at 723 K. The innovation route exhibits advantages for predation of TE bulks when compared to the conventional methods, especially in terms of efficiency while it still maintains TE performance. © 2019, The Nonferrous Metals Society of China and Springer-Verlag GmbH Germany, part of Springer Nature.
Ämnesord och genrebeteckningar
- TEKNIK OCH TEKNOLOGIER Maskinteknik Annan maskinteknik hsv//swe
- ENGINEERING AND TECHNOLOGY Mechanical Engineering Other Mechanical Engineering hsv//eng
- Half-Heusler alloys
- Hf doping
- Microwave synthesis
- Thermoelectric figure of merit
- Antimony compounds
- Electric conductivity
- Grain boundaries
- Microwave heating
- Microwaves
- Nickel compounds
- Point defects
- Scanning electron microscopy
- Seebeck coefficient
- Sintering
- Thermal conductivity
- Thermoanalysis
- Thermoelectricity
- Tin compounds
- Conventional methods
- Microwave sintering
- Thermoelectric performance
- X ray diffractometers
- Titanium compounds
Biuppslag (personer, institutioner, konferenser, titlar ...)
- Li, YuAnhui University of Technology, CHN (författare)
- Wan, RundongBlekinge Tekniska Högskola,Institutionen för maskinteknik(Swepub:bth)rxw (författare)
- Chen, WenChangsha Research Institute of Mining and Metallurgy, CHN (författare)
- Zhou, HongweiLanzhou University of Technology, CHN (författare)
- Anhui University of Technology, CHNInstitutionen för maskinteknik (creator_code:org_t)
Sammanhörande titlar
- Ingår i:Rare Metals: Springer Nature42:11, s. 3780-37861001-05211867-7185
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- Lei, Ying
- Li, Yu
- Wan, Rundong
- Chen, Wen
- Zhou, Hongwei
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