Development of Solid Electrolyte Sensors Operative at Ordinary Temperature

这个项目是以开发新的固体状态气体传感器操作中使用固体电解质正常温度为目标的，我.e.，<H_2>使用质子导体的CO传感器和使用氧传感器的CO传感器<F_3>。所取得的结果是按以下顺序进行的。质子导体传感器：传感器元件基本上是基于电化学细胞（Pt黑色!）质子导体! Pt黑色）在哪一种抗菌酸主要被用作质子导体。在这个项目中开发的传感器被发现对空气敏感，以达到较小的剂量<H_2>和CO在房间温度下，可以在以下三个类别中分类，以符合使用的输出信号。（1）电位计量传感器;一种电动力，作为电位计量传感器的传感器信号的可能性是在空气中的逻辑和CO浓度，因此这种类型的传感器适合在宽距离集中中检测样品气体<H_2>。（2）安培计量传感器;一个短电路当前的倍增器。 ... More 安培计量传感器的信号是在恒定人类下直接转化为样品气体集中的过程中。安培测量传感器在气体集中的精确测量中具有优势的潜力。（3）四种探针类型传感器;在短电路条件下，可能存在的差异，其中可以通过插入Ag探针在质子导体中产生质子导体，通过与样品气体接触的传感Pt电极。潜在的差异是环境大气中集中程度的一个线性函数，是人类在环境大气中的依赖<H_2>。Lananthanum fluoride oxygen sensor;由electrochemical cell （Sn，Sn !）组成的传感<F_2>器La<F_3>! Pt，<O_2>）和细胞的电动力已经发现，即使在房间温度下，也能改变氧气的局部压力的逻辑。（1）单晶体传感器;当新制造的元件显示出缓慢的反应时，在150 ° C时暴露于水蒸汽，然后在25 ° C时重复反应以减少氧气的90%的反应时间，约2分钟。这个传感器也能敏感地对溶解水中的氧气产生反应。（2）Sputered Film传感器<F_3>;通过使用Sputtered La Film （ 5米厚），90%的响应时间可以被分解<micro>。30秒后的蒸汽治疗。Less（低）

This project has aimed at developing new solid state gas sensors operative at ordinary temperature using solid electrolyte, i.e., <H_2> and CO sensor using proton conductors and oxygen sensor using La <F_3> . The results obtained are as follows.1. Proton conductor sensor: Sensor elements were essentially based on the electrochemical cell (Pt black !proton conductor!Pt black) in which antimonic acid was mainly used as proton conductor. The sensors developed in this project were found to be sensitive to small amounts of <H_2> and CO in air at room temperature and could be classified in the following three categories according to the out-put signals used.(1) Potentiometric sensor; An electromotive force ultilized as sensor signal of the potentiometric sensor was proportional to a logarithum of <H_2> and CO concentration in air and thus this type of sensor was fit for detecting sample gases in a wide-ranging concentration.(2) Amperometric sensor; A short circuit current ultilized as sensor … More signal of the amperometric sensor was in direct proportion to the sample gas concentration under the constant humidity. The amperometric sensor had an advantage over potentiometric one in precise measurement of gas concentration.(3) Four-probe type sensor; Under the short circuit condition, the potential difference which could be detected by Ag probes inserted in the proton conductor was produced in the proton conductor by the contact of the sensing Pt electrode with the sample gas. The potential difference was a linear function of <H_2> concentration independent of humidity in an ambient atmosphere.2. Lanthanum fluoride oxygen sensor; The sensor composed the electrochemical cell (Sn,Sn <F_2> !La <F_3> !Pt, <O_2> )and an electromotive force of the cell was found to change in proportion to a logarithum of oxygen partial pressure even at room temperature.(1) Single crystal sensor; While the newly fabricated elements showed very slow response, exposure to water vapor at 150 ゜C followed by the repetition of response to oxygen reduced the 90% response time to about 2 min at 25 ゜C. This sensor could also respond sensitively to dissolved oxygen in water.(2) Spputered film sensor; By using the sputtered La <F_3> film ( 5 <micro> m thick), the 90% respnse time could be decreased to ca. 30 sec after water vapor treatment. Less