Properties of sintered n-type (Bi0.95Sb0.05)2(Te0.95Se0.05)3 and p-type (Bi0.2Sb0.8)2Te3 tellurides

Juha Hassel, Jyrki Tervo

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Abstract

Properties of Spark Plasma Sintered (SPS) and Hot Isostatically Pressed (HIP) n- and p-type tellurides were studied. Composition of n-type powder was (Bi0.95Sb0.05)2(Te0.95Se0.05)3 and p-type (Bi0.2Sb0.8)2Te3. The powder material composition is essentially the same as presented by Vasilevskiy et al, 2010. SPS sintering was conducted in high vacuum at 673 K and 48 MPa with 1 minute holding time. Consolidation of HIP samples was done at 573 K at 100 MPa for 120 minutes. Charge carrier densities and mobilities were measured at room temperature. Electrical conductivity, thermal conductivity and Seebeck coefficient was measured in temperature range of 300 K - 520 K. Effort was made to fit data into a transport model. Especially, the aim was to gain understanding on the effect of sintering method on scattering mechanisms of tellurides and corresponding consequences on thermoelectric figures of merit. Based on this, material optimization issues on powder-based sintered materials are discussed.
Original languageEnglish
Title of host publicationICT/ECT 2012, The 31st International & 10th European Conference on Thermoelectrics, July 9th-12th, 2012, Aalborg, Denmark
Subtitle of host publicationBook of Abstracts
Place of PublicationAalborg, Denmark
PublisherAalborg University
Publication statusPublished - 2012
MoE publication typeNot Eligible

Fingerprint

tellurides
sparks
sintering
consolidation
Seebeck effect
high vacuum
carrier mobility
figure of merit
charge carriers
thermal conductivity
electrical resistivity
optimization
room temperature
coefficients
scattering
temperature

Keywords

  • plasma spray
  • thermoelectrics
  • oxides

Cite this

Hassel, J., & Tervo, J. (2012). Properties of sintered n-type (Bi0.95Sb0.05)2(Te0.95Se0.05)3 and p-type (Bi0.2Sb0.8)2Te3 tellurides. In ICT/ECT 2012, The 31st International & 10th European Conference on Thermoelectrics, July 9th-12th, 2012, Aalborg, Denmark: Book of Abstracts [38] Aalborg, Denmark: Aalborg University.
Hassel, Juha ; Tervo, Jyrki. / Properties of sintered n-type (Bi0.95Sb0.05)2(Te0.95Se0.05)3 and p-type (Bi0.2Sb0.8)2Te3 tellurides. ICT/ECT 2012, The 31st International & 10th European Conference on Thermoelectrics, July 9th-12th, 2012, Aalborg, Denmark: Book of Abstracts. Aalborg, Denmark : Aalborg University, 2012.
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abstract = "Properties of Spark Plasma Sintered (SPS) and Hot Isostatically Pressed (HIP) n- and p-type tellurides were studied. Composition of n-type powder was (Bi0.95Sb0.05)2(Te0.95Se0.05)3 and p-type (Bi0.2Sb0.8)2Te3. The powder material composition is essentially the same as presented by Vasilevskiy et al, 2010. SPS sintering was conducted in high vacuum at 673 K and 48 MPa with 1 minute holding time. Consolidation of HIP samples was done at 573 K at 100 MPa for 120 minutes. Charge carrier densities and mobilities were measured at room temperature. Electrical conductivity, thermal conductivity and Seebeck coefficient was measured in temperature range of 300 K - 520 K. Effort was made to fit data into a transport model. Especially, the aim was to gain understanding on the effect of sintering method on scattering mechanisms of tellurides and corresponding consequences on thermoelectric figures of merit. Based on this, material optimization issues on powder-based sintered materials are discussed.",
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author = "Juha Hassel and Jyrki Tervo",
note = "Published abstract of a poster Project code: 70893",
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Hassel, J & Tervo, J 2012, Properties of sintered n-type (Bi0.95Sb0.05)2(Te0.95Se0.05)3 and p-type (Bi0.2Sb0.8)2Te3 tellurides. in ICT/ECT 2012, The 31st International & 10th European Conference on Thermoelectrics, July 9th-12th, 2012, Aalborg, Denmark: Book of Abstracts., 38, Aalborg University, Aalborg, Denmark.

Properties of sintered n-type (Bi0.95Sb0.05)2(Te0.95Se0.05)3 and p-type (Bi0.2Sb0.8)2Te3 tellurides. / Hassel, Juha; Tervo, Jyrki.

ICT/ECT 2012, The 31st International & 10th European Conference on Thermoelectrics, July 9th-12th, 2012, Aalborg, Denmark: Book of Abstracts. Aalborg, Denmark : Aalborg University, 2012. 38.

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

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T1 - Properties of sintered n-type (Bi0.95Sb0.05)2(Te0.95Se0.05)3 and p-type (Bi0.2Sb0.8)2Te3 tellurides

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N1 - Published abstract of a poster Project code: 70893

PY - 2012

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N2 - Properties of Spark Plasma Sintered (SPS) and Hot Isostatically Pressed (HIP) n- and p-type tellurides were studied. Composition of n-type powder was (Bi0.95Sb0.05)2(Te0.95Se0.05)3 and p-type (Bi0.2Sb0.8)2Te3. The powder material composition is essentially the same as presented by Vasilevskiy et al, 2010. SPS sintering was conducted in high vacuum at 673 K and 48 MPa with 1 minute holding time. Consolidation of HIP samples was done at 573 K at 100 MPa for 120 minutes. Charge carrier densities and mobilities were measured at room temperature. Electrical conductivity, thermal conductivity and Seebeck coefficient was measured in temperature range of 300 K - 520 K. Effort was made to fit data into a transport model. Especially, the aim was to gain understanding on the effect of sintering method on scattering mechanisms of tellurides and corresponding consequences on thermoelectric figures of merit. Based on this, material optimization issues on powder-based sintered materials are discussed.

AB - Properties of Spark Plasma Sintered (SPS) and Hot Isostatically Pressed (HIP) n- and p-type tellurides were studied. Composition of n-type powder was (Bi0.95Sb0.05)2(Te0.95Se0.05)3 and p-type (Bi0.2Sb0.8)2Te3. The powder material composition is essentially the same as presented by Vasilevskiy et al, 2010. SPS sintering was conducted in high vacuum at 673 K and 48 MPa with 1 minute holding time. Consolidation of HIP samples was done at 573 K at 100 MPa for 120 minutes. Charge carrier densities and mobilities were measured at room temperature. Electrical conductivity, thermal conductivity and Seebeck coefficient was measured in temperature range of 300 K - 520 K. Effort was made to fit data into a transport model. Especially, the aim was to gain understanding on the effect of sintering method on scattering mechanisms of tellurides and corresponding consequences on thermoelectric figures of merit. Based on this, material optimization issues on powder-based sintered materials are discussed.

KW - plasma spray

KW - thermoelectrics

KW - oxides

M3 - Conference abstract in proceedings

BT - ICT/ECT 2012, The 31st International & 10th European Conference on Thermoelectrics, July 9th-12th, 2012, Aalborg, Denmark

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Hassel J, Tervo J. Properties of sintered n-type (Bi0.95Sb0.05)2(Te0.95Se0.05)3 and p-type (Bi0.2Sb0.8)2Te3 tellurides. In ICT/ECT 2012, The 31st International & 10th European Conference on Thermoelectrics, July 9th-12th, 2012, Aalborg, Denmark: Book of Abstracts. Aalborg, Denmark: Aalborg University. 2012. 38