Photopyroelectric Technique in Thermal Diffusivity Determination and Spectroscopic Response of Solid Samples
Conventional photopyroelectric (PPE) measurement of thermal diffusivity of optically opaque sample was done in case of thermally thick sample, but it underwent a great attenuation of signal. In this study, the generalisation of Mandel is and Zver special cases of thermally thin-thick sample has b...
محفوظ في:
| المؤلف الرئيسي: | |
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| التنسيق: | أطروحة |
| اللغة: | English English |
| منشور في: |
2003
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| الموضوعات: | |
| الوصول للمادة أونلاين: | http://psasir.upm.edu.my/id/eprint/9583/1/FSAS_2003_42_IR.pdf |
| الوسوم: |
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| الملخص: | Conventional photopyroelectric (PPE) measurement of thermal diffusivity of
optically opaque sample was done in case of thermally thick sample, but it
underwent a great attenuation of signal. In this study, the generalisation of Mandel is
and Zver special cases of thermally thin-thick sample has been derived and was used
to determine the thermal diffusivity. The method was experimentally tested for
aluminium samples of different thickness and copper sample, and the values obtained
were close to the literature values.
The Bennett and Patty theory in the generation of photoacoustic signal has been
successfully adopted in the generation of PPE signal. An equation of complex PPE
signal was derived. A normalisation procedure was used to eliminate a number of
unknown parameters in PPE cell. The method was experimentally tested for
aluminium, copper, and nickel samples, and the values obtained were close to the
literature values. |
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