Thermal diffusivity measurements using linear relations from photothermal wave experiments
作者:
A. Salazar,
A. Sa´nchez‐Lavega,
期刊:
Review of Scientific Instruments
(AIP Available online 1994)
卷期:
Volume 65,
issue 9
页码: 2896-2900
ISSN:0034-6748
年代: 1994
DOI:10.1063/1.1144635
出版商: AIP
数据来源: AIP
摘要:
We present a methodology to retrieve the thermal diffusivity of bulk homogeneous samples based on a set of simple linear relations that exist between two measurable magnitudes in modulated photothermal experiments. The influence of the photothermal parameters involved (exciting beam radius and height and radius of the probe beam) is evaluated to assert the validity of the linear relations. Specifically, we discuss the thermoreflectance and mirage techniques and their more convenient use and method, depending on the kind of sample to analyze (solid, liquid, gas), to obtain the thermal diffusivity.
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