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首页> 外文期刊>Review of Scientific Instruments >Note: Response characteristics of the sensor based on LaF_(3) thin film to different humidified gases
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Note: Response characteristics of the sensor based on LaF_(3) thin film to different humidified gases

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Electromotive force (EMF) transient curves presented that the sensor showed good repeatable response in the humidity environments using ambient atmosphere as the carrier gas at different temperatures. The 90percent response time and recovery time were within 40 s and 50 s, respectively. The sensor also presented stable response characteristics in 75.1percent RH and 83.6percent RH humidity environments using N_(2), 5percent O_(2), and 50percent O_(2) as the carrier gases, respectively. The EMF always increased with the partial pressure of oxygen in certain relative humidity. However, the (DELTA)EMF was decreased with the increase of O_(2) content in the carrier gas under the condition of the variation of relative humidity from 75.1percent to 83.6percent. These phenomena revealed that the sensor was sensitive to water vapor without oxygen in the sample gas and too much water vapor had adverse effect on the response to oxygen. Non-Nernst behavior of the sensor was discussed in detail.

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