A THERMAL-DIFFUSIVITY STUDY OF THE SOLID-PHASE OF POROUS SAMPLES

Authors
VELINOV T BRANSALOV K MIHOVSKI M
Citation
T. Velinov et al., A THERMAL-DIFFUSIVITY STUDY OF THE SOLID-PHASE OF POROUS SAMPLES, Measurement science & technology, 4(11), 1993, pp. 1266-1268
Citations number
9
Categorie Soggetti
Instument & Instrumentation",Engineering
Journal title
Measurement science & technology → ACNP
ISSN journal
09570233
Volume
4
Issue
11
Year of publication
1993
Pages
1266 - 1268
Database
ISI
SICI code
0957-0233(1993)4:11<1266:ATSOTS>2.0.ZU;2-Y
Abstract
A method for determination of the thermal diffusivity of the solid pha se of porous samples, based on frequency-dependent scattering of optic ally induced thermal waves, is presented. The surface temperature vari ation of powder-metallurgic Fe samples, due to modulated laser heating , was detected by a photoacoustic cell in the frequency range 30-320 H z. The thermal diffusivity values obtained from comparison with a theo retical model (Appl. Phys. A 54 6 (1992)) are close to those of a homo geneous sample.