El Instituto Politécnico Nacional
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http://repositoriodigital.ipn.mx/handle/123456789/10815Registro completo de metadatos
| Campo DC | Valor | Lengua/Idioma |
|---|---|---|
| dc.creator | Calderon, A. | - |
| dc.creator | Muñoz Hernandez, R. A. | - |
| dc.creator | Tomas, S. A. | - |
| dc.creator | Cruz Orea, A. | - |
| dc.creator | Sanchez Sinencio, F. | - |
| dc.date | 2012-03-25T07:39:34Z | - |
| dc.date | 2012-03-25T07:39:34Z | - |
| dc.date | 1998 | - |
| dc.date.accessioned | 2013-01-16T10:10:56Z | - |
| dc.date.available | 2013-01-16T10:10:56Z | - |
| dc.date.issued | 2013-01-16 | - |
| dc.identifier | 0021-8979 | - |
| dc.identifier | http://hdl.handle.net/123456789/322 | - |
| dc.identifier.uri | http://www.repositoriodigital.ipn.mx/handle/123456789/10815 | - |
| dc.description | We present a method for determining the thermal diffusivity in opaque solids by means of an analysis of the photoacoustic phase signal at low modulation frequencies using the open -cell photoacoustic technique. We show for f ⩽ (π/2)2fc, where fc is the modulation frequency at which the thermal diffusion length matches the sample thickness, the photoacoustic phase signal can be written in linear form with the modulation frequency f. Then, obtaining the proportionality coefficient by fitting the experimental data, the thermal diffusivity of the sample can be determined. The advantage of this method is that it is realized in a range of modulation requencies below those normally used, hence, the photoacoustic signal should be alone attributed to the mechanism of thermal diffusion. Moreover, the signal-to-noise ratio will be more reliable. This method was tested in some samples and it is also shown to be important in solids with high diffusivity values and thin materials. | - |
| dc.description | Research article of journal indexed in ISI database | - |
| dc.description | Instituto Politecnico Nacional and CONACYT-Mexico | - |
| dc.language | en_US | - |
| dc.publisher | Journal of Applied Physics | - |
| dc.subject | Photoacoustic | - |
| dc.subject | Thermal diffusivity | - |
| dc.title | Method for measurement of the thermal diffusivity in | - |
| dc.type | Article | - |
| Aparece en las colecciones: | Doctorado | |
Ficheros en este ítem:
| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| 1998 JAP v84 p6327.pdf | 198.84 kB | Adobe PDF | Visualizar/Abrir |
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