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Characterizing Thermal Properties of Melting Te Semiconductor: Thermal Diffusivity Measurements and SimulationTellurium is an element for many II-VI and I-III-VI(sub 2) compounds that are useful materials for fabricating many devises. In the melt growth techniques, the thermal properties of the molten phase are important parameter for controlling growth process to improve semiconducting crystal quality. In this study, thermal diffusivity of molten tellurium has been measured by a laser flash method in the temperature range from 500 C to 900 C. A pulsed laser with 1064 nm wavelength is focused on one side of the measured sample. The thermal diffusivity can be estimated from the temperature transient at the other side of the sample. A numerical simulation based on the thermal transport process has been also performed. By numerically fitting the experimental results, both the thermal conductivity and heat capacity can be derived. A relaxation phenomenon, which shows a slow drift of the measured thermal conductivity toward the equilibrium value after cooling of the sample, was observed for the first time. The error analysis and the comparison of the results to published data measured by other techniques will be discussed in the presentation.
Document ID
20030001553
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Zhu, Shen
(Universities Space Research Association Huntsville, AL United States)
Su, Ching-Hua
(NASA Marshall Space Flight Center Huntsville, AL United States)
Li, C.
(Alabama Univ. Birmingham, AL United States)
Lin, B.
(Alabama Univ. Birmingham, AL United States)
Ben, H.
(Alabama Univ. Birmingham, AL United States)
Scripa, R. N.
(Alabama Univ. Birmingham, AL United States)
Lehoczky, S. L.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Curreri, Peter A.
Date Acquired
August 21, 2013
Publication Date
January 1, 2002
Subject Category
Solid-State Physics
Meeting Information
Meeting: Fourteenth American Conference on Crystal Growth and Epitaxy
Location: Seattle, WA
Country: United States
Start Date: August 5, 2002
Funding Number(s)
CONTRACT_GRANT: NCC8-66
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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