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Comparison of thermoelectric performance of AgPbxSbTe20 (x=20–22.5) polycrystals fabricated by different methods

► Thermoelectric AgPb SbTe alloys were fabricated by two methods to clarify processing influence. ► Comparison with melting process confirmed the merits of MA-SPS process for fabricating AgPb SbTe .► Thermoelectric property of AgPb SbTe was revealed more sensitive to Pb content rather than process.... Full description

Journal Title: Journal of Alloys and Compounds 05 February 2013, Vol.549, pp.319-323
Main Author: Li, Zong-Yue
Other Authors: Zou, Minmin , Li, Jing-Feng
Format: Electronic Article Electronic Article
Language: English
Subjects:
Sps
Quelle: ScienceDirect Journals (Elsevier)
ID: ISSN: 0925-8388 ; E-ISSN: 1873-4669 ; DOI: 10.1016/j.jallcom.2012.09.065
Link: https://www.sciencedirect.com/science/article/pii/S0925838812016398
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recordid: elsevier_sdoi_10_1016_j_jallcom_2012_09_065
title: Comparison of thermoelectric performance of AgPbxSbTe20 (x=20–22.5) polycrystals fabricated by different methods
format: Article
creator:
  • Li, Zong-Yue
  • Zou, Minmin
  • Li, Jing-Feng
subjects:
  • Thermoelectric Material
  • Last
  • Melting
  • Mechanical Alloying
  • Sps
  • Engineering
  • Chemistry
  • Physics
ispartof: Journal of Alloys and Compounds, 05 February 2013, Vol.549, pp.319-323
description: ► Thermoelectric AgPb SbTe alloys were fabricated by two methods to clarify processing influence. ► Comparison with melting process confirmed the merits of MA-SPS process for fabricating AgPb SbTe .► Thermoelectric property of AgPb SbTe was revealed more sensitive to Pb content rather than process. ► A dimensionless figure of merit up to 1.25 at 725K was obtained in an optimal composition AgPb SbTe . Both vacuum melting and mechanical alloying (MA) were applied to the fabrication of AgPb SbTe ( = 20, 21 and 22.5) as a promising thermoelectric material to investigate the processing influence on its thermoelectric properties. The AgPb SbTe compound powders were prepared by pulverizing the melted ingots or directly from MA, which were then consolidated to fine-grained bulk materials by spark plasma sintering (SPS). A high value of 1.25 at 725 K was observed in the AgPb SbTe samples fabricated by both methods. Thermoelectric properties of all AgPb SbTe compounds synthesized by vacuum melting method are nearly the same as that of those fabricated by MA combined with SPS in the whole measured temperature range. Considering the complexity of the melting method but with the same results as the MA–SPS method, the present work revealed that the MA–SPS process is more suitable for the fabrication of PbTe-based thermoelectric materials.
language: eng
source: ScienceDirect Journals (Elsevier)
identifier: ISSN: 0925-8388 ; E-ISSN: 1873-4669 ; DOI: 10.1016/j.jallcom.2012.09.065
fulltext: fulltext
issn:
  • 0925-8388
  • 09258388
  • 1873-4669
  • 18734669
url: Link


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titleComparison of thermoelectric performance of AgPbxSbTe20 (x=20–22.5) polycrystals fabricated by different methods
creatorLi, Zong-Yue ; Zou, Minmin ; Li, Jing-Feng
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subjectThermoelectric Material ; Last ; Melting ; Mechanical Alloying ; Sps ; Engineering ; Chemistry ; Physics
description► Thermoelectric AgPb SbTe alloys were fabricated by two methods to clarify processing influence. ► Comparison with melting process confirmed the merits of MA-SPS process for fabricating AgPb SbTe .► Thermoelectric property of AgPb SbTe was revealed more sensitive to Pb content rather than process. ► A dimensionless figure of merit up to 1.25 at 725K was obtained in an optimal composition AgPb SbTe . Both vacuum melting and mechanical alloying (MA) were applied to the fabrication of AgPb SbTe ( = 20, 21 and 22.5) as a promising thermoelectric material to investigate the processing influence on its thermoelectric properties. The AgPb SbTe compound powders were prepared by pulverizing the melted ingots or directly from MA, which were then consolidated to fine-grained bulk materials by spark plasma sintering (SPS). A high value of 1.25 at 725 K was observed in the AgPb SbTe samples fabricated by both methods. Thermoelectric properties of all AgPb SbTe compounds synthesized by vacuum melting method are nearly the same as that of those fabricated by MA combined with SPS in the whole measured temperature range. Considering the complexity of the melting method but with the same results as the MA–SPS method, the present work revealed that the MA–SPS process is more suitable for the fabrication of PbTe-based thermoelectric materials.
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