A simple approach to introduce photothermal techniques basic principles for thermal diffusivity measurement
We report an approach to introduce the students to the field of the photothermal techniques. For this, we describe an experiment about the measurement of the periodical oscillations of the temperature in a body heated with a periodic heat source. These thermal oscillations can be called thermal wave...
| Autores: | , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2009 |
| País: | México |
| Recursos: | Instituto Politécnico Nacional |
| Repositório: | Repositorio Digital del IPN |
| OAI Identifier: | oai:www.repositoriodigital.ipn.mx:123456789/10580 |
| Acesso em linha: | http://hdl.handle.net/123456789/40 http://www.repositoriodigital.ipn.mx/handle/123456789/10580 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Photothermal thermal diffusivity heat temperature |
| Resumo: | We report an approach to introduce the students to the field of the photothermal techniques. For this, we describe an experiment about the measurement of the periodical oscillations of the temperature in a body heated with a periodic heat source. These thermal oscillations can be called thermal waves. We show how, by means of the measurement of the phase difference and attenuation of the thermal waves with the penetration distance in the body, we can determine their thermal diffusivity. This is a result in which some of the photothermal techniques are based for applications related with the thermal characterization of materials. In particular we use the technique of pyroelectric detection to show this purpose. |
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