Functionality of Surface Acoustic Wave (SAW) transducer for palladium-platinum-based hydrogen sensor
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- 作者：L. Perez-Cortes ; perezcol@univ-savoie.frAuthor Vitae ; C. Hernandez-RodriguezAuthor Vitae ; T. MazingueAuthor Vitae ; M. Lomello-TafinAuthor Vitae
- 关键词：Surface Acoustic Wave (SAW) ; Gas sensor ; Palladium&ndash ; platinum ; Electrical model
- 刊名：Sensors and Actuators A: Physical
- 出版年：2016
- 出版时间：1 November 2016
- 年：2016
- 卷：251
- 期：Complete
- 页码：35-41
- 全文大小：1722 K
- 卷排序：251
文摘
The nanostructured palladium–platinum (PdPt) catalyst and the Surface Acoustic Wave device offers functional possibilities for developing an innovative hydrogen sensor. Since the catalysis between hydrogen and oxygen in ambient air releases heat, an electrical signal correlated with hydrogen concentration can be obtained by transferring PdPt heat over the SAW delay path. This scheme of detection has never been performed up to now and special attention is given in this article to prove its feasibility. In this purpose, we report an alternative SAW model that incorporates representations for interdigital transducers and delay path, and can reproduce changes in temperature. This model can be used to design an optimized temperature-sensitive SAW taking into account the effects of temperature over the delay path. We report as well the choice of the phase signal for temperature variation measurements (phase as a function of temperature) of a SAW made of LiNb03 128° YX (128°, rot Y cut, X prop.). We consider that an optimized SAW device can detect the slight PdPt temperature increase.