NDLI: Processing and Thermal Conductivity of Lead Telluride Microwires

Content Provider	Springer Nature Link
Author	Bhatta, Rudra P. Annamalai, Sezhian Brandys, Marek Pegg, Ian L. Dutta, Biprodas
Copyright Year	2014
Abstract	We present a unique method for producing continuous PbTe microwires which may be spooled for commercial use, and provide evidence that such wires tend to form single crystals with diameters less than 10 μm. Because PbTe microwires can, potentially, be used to fabricate miniature thermoelectric generators, a commercial fiber optic draw tower was used to produce such wires. In general, the thermoelectric figure of merit of a semiconductor is expected to decrease if its thermal conductivity increases. Because PbTe microwires with diameters less than 10 μm contain no grain boundaries and have fewer other defects, for example cracks and pores, their thermal conductivity was expected to be high, as a result of reduced phonon scattering. Accordingly, it was of interest to determine how the thermal conductivity of PbTe microwires behaved in two diameter ranges, i.e., those with diameters <10 μm and those with substantially larger diameters. We report thermal conductivity data for such microwires, at 725 K, determined by use of the 3ω method. Special attention was paid to minimizing conduction and radiation losses which are sources of error at high temperatures. The results prove that the thermal conductivity of PbTe microwires remains invariant in the diameter range 1.6–60 μm.
Starting Page	2731
Ending Page	2737
Page Count	7
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	43
Issue Number	7
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2014-03-31
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Lead telluride microwires thermal conductivity 3ω method Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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