Bloating in (Pb 0.95Sn 0.05Te) 0.92(PbS) 0.08-0.055%PbI 2 thermoelectric specimens as a result of processing conditions

Jennifer E. Ni; Eldon D. Case; Ryan Stewart; Chun I. Wu; Timothy P. Hogan; Mercouri G. Kanatzidis

doi:10.1007/s11664-011-1853-0

Bloating in (Pb _0.95Sn _0.05Te) _0.92(PbS) _0.08-0.055%PbI ₂ thermoelectric specimens as a result of processing conditions

Jennifer E. Ni^*, Eldon D. Case, Ryan Stewart, Chun I. Wu, Timothy P. Hogan, Mercouri G. Kanatzidis

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Lead chalcogenides such as (Pb _0.95Sn _0.05Te) _0.92(PbS) _0.08-0.055%PbI ₂ have received attention due to their encouraging thermoelectric properties. For the hot pressing (HP) and pulsed electric current sintering (PECS) techniques used in this study, decomposition reactions can generate porosity (bloating). Porosity in turn can degrade electrical, thermal, and mechanical properties. In this study, microstructural observations (scanning electron microscopy) and room-temperature elasticity measurements (resonant ultrasound spectroscopy) were used to characterize bloating generated during post-densification anneals. Although every HP specimen bloated during post-densification annealing, no bloating was observed for the PECS specimens processed from dry milled only powders. The lack of bloating for the annealed PECS specimens may be related to the electrical discharge intrinsic in the PECS process, which reportedly cleans the powder particle surfaces during densification.

Original language	English (US)
Pages (from-to)	1153-1158
Number of pages	6
Journal	Journal of Electronic Materials
Volume	41
Issue number	6
DOIs	https://doi.org/10.1007/s11664-011-1853-0
State	Published - Jun 2012

Funding

This research was supported by the Office of Naval Research, Grant N00014-08-1-0613 and the Department of Energy, ‘‘Revolutionary Materials for Solid State Energy Conversion Center,’’ an Energy Frontiers Research Center funded by the US Department of Energy, Office of Basic Energy Sciences under Award Number DE-SC0001054. Ed Timm of the Mechanical Engineering Department, Michigan State University assisted the authors with hot pressing and cutting the specimens.

Keywords

Thermoelectrics
Young's modulus
porosity
resonant ultrasound spectroscopy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1007/s11664-011-1853-0

Cite this

@article{e2969e63ba0f4f0396436d1df02fda00,

title = "Bloating in (Pb 0.95Sn 0.05Te) 0.92(PbS) 0.08-0.055%PbI 2 thermoelectric specimens as a result of processing conditions",

abstract = "Lead chalcogenides such as (Pb 0.95Sn 0.05Te) 0.92(PbS) 0.08-0.055%PbI 2 have received attention due to their encouraging thermoelectric properties. For the hot pressing (HP) and pulsed electric current sintering (PECS) techniques used in this study, decomposition reactions can generate porosity (bloating). Porosity in turn can degrade electrical, thermal, and mechanical properties. In this study, microstructural observations (scanning electron microscopy) and room-temperature elasticity measurements (resonant ultrasound spectroscopy) were used to characterize bloating generated during post-densification anneals. Although every HP specimen bloated during post-densification annealing, no bloating was observed for the PECS specimens processed from dry milled only powders. The lack of bloating for the annealed PECS specimens may be related to the electrical discharge intrinsic in the PECS process, which reportedly cleans the powder particle surfaces during densification.",

keywords = "Thermoelectrics, Young's modulus, porosity, resonant ultrasound spectroscopy",

author = "Ni, {Jennifer E.} and Case, {Eldon D.} and Ryan Stewart and Wu, {Chun I.} and Hogan, {Timothy P.} and Kanatzidis, {Mercouri G.}",

note = "Funding Information: This research was supported by the Office of Naval Research, Grant N00014-08-1-0613 and the Department of Energy, {\textquoteleft}{\textquoteleft}Revolutionary Materials for Solid State Energy Conversion Center,{\textquoteright}{\textquoteright} an Energy Frontiers Research Center funded by the US Department of Energy, Office of Basic Energy Sciences under Award Number DE-SC0001054. Ed Timm of the Mechanical Engineering Department, Michigan State University assisted the authors with hot pressing and cutting the specimens.",

year = "2012",

month = jun,

doi = "10.1007/s11664-011-1853-0",

language = "English (US)",

volume = "41",

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journal = "Journal of Electronic Materials",

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AU - Ni, Jennifer E.

AU - Case, Eldon D.

AU - Stewart, Ryan

AU - Wu, Chun I.

AU - Hogan, Timothy P.

AU - Kanatzidis, Mercouri G.

N1 - Funding Information: This research was supported by the Office of Naval Research, Grant N00014-08-1-0613 and the Department of Energy, ‘‘Revolutionary Materials for Solid State Energy Conversion Center,’’ an Energy Frontiers Research Center funded by the US Department of Energy, Office of Basic Energy Sciences under Award Number DE-SC0001054. Ed Timm of the Mechanical Engineering Department, Michigan State University assisted the authors with hot pressing and cutting the specimens.

PY - 2012/6

Y1 - 2012/6

N2 - Lead chalcogenides such as (Pb 0.95Sn 0.05Te) 0.92(PbS) 0.08-0.055%PbI 2 have received attention due to their encouraging thermoelectric properties. For the hot pressing (HP) and pulsed electric current sintering (PECS) techniques used in this study, decomposition reactions can generate porosity (bloating). Porosity in turn can degrade electrical, thermal, and mechanical properties. In this study, microstructural observations (scanning electron microscopy) and room-temperature elasticity measurements (resonant ultrasound spectroscopy) were used to characterize bloating generated during post-densification anneals. Although every HP specimen bloated during post-densification annealing, no bloating was observed for the PECS specimens processed from dry milled only powders. The lack of bloating for the annealed PECS specimens may be related to the electrical discharge intrinsic in the PECS process, which reportedly cleans the powder particle surfaces during densification.

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