Improvement of the photoacoustic response in thermal diffusivity measurements
An alternative photoacoustic cell configuration for the determination of the thermal diffusivity (α), at room temperature, for solid materials is presented. The method is based on the use of two identical photoacoustic chambers, inside both of them, a metallic foil thermally thin is used to transfor...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | México |
| Institución: | UNIVERSIDAD AUTÓNOMA DE BAJA CALIFORNIA |
| Repositorio: | Revista de Ciencias Tecnológicas |
| Idioma: | español |
| OAI Identifier: | oai:ojs.recit.uabc.mx:article/16 |
| Acceso en línea: | https://recit.uabc.mx/index.php/revista/article/view/16 |
| Access Level: | acceso abierto |
| Palabra clave: | Configuration photoacoustic Photoacoustic response Thermal diffusivity Photoacoustic cell Rosencwaig and Gersho model. Arreglo fotoacústico Respuesta fotoacústica Difusividad térmica Celda fotoacústica Modelo de Rosencwaig y Gersho |
| Sumario: | An alternative photoacoustic cell configuration for the determination of the thermal diffusivity (α), at room temperature, for solid materials is presented. The method is based on the use of two identical photoacoustic chambers, inside both of them, a metallic foil thermally thin is used to transform the light energy to heat energy. A Reference material placed parallel to a study material allows to relate the thermal properties of the materials used as support in the photoacoustic chambers of the experimental arrangement presented here. The ratio between experimental and theoretical photoacoustic amplitudes is realized to validate a proposed mathematical model. |
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