Reduction of radiation errors in thermal conductivity measurements above 100 K

Reduction of radiation errors in thermal conductivity measurements above 100 K

A steady‐state method for thermal conductivity measurements above 100 K on poor conductors is described. Radiation errors are made negligible using a closely fitting shield with a temperature profile matched along its length to that of the sample. Calculations show that for a typical geometry, the r...

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Veröffentlicht in:Review of scientific instruments 1991-04, Vol.62 (4), p.1054-1056
Hauptverfasser: Talpe, Juan H., Bekeris, Victoria I., Sanchez, Maria J., Simonelli, Gabriela
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Exact sciences and technology
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Physics
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container_end_page 1056
container_issue 4
container_start_page 1054
container_title Review of scientific instruments
container_volume 62
creator Talpe, Juan H.
Bekeris, Victoria I.
Sanchez, Maria J.
Simonelli, Gabriela
description A steady‐state method for thermal conductivity measurements above 100 K on poor conductors is described. Radiation errors are made negligible using a closely fitting shield with a temperature profile matched along its length to that of the sample. Calculations show that for a typical geometry, the radiation error at room temperature is two or three orders of magnitude lower than for a shield kept at the sink temperature. The experimental setup is described and measurements on PMMA are reported. The results agree with measurements reported by other authors who use completely different methods.
doi_str_mv 10.1063/1.1142057
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subjects Exact sciences and technology
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Physics
title Reduction of radiation errors in thermal conductivity measurements above 100 K
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