کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1463284 | 989645 | 2009 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Response characteristics of all-solid-state pH sensor using Li5YSi4O12 glass Response characteristics of all-solid-state pH sensor using Li5YSi4O12 glass](/preview/png/1463284.png)
A new type of all-solid-state pH sensor was investigated for the monitoring of pH in high temperature. The all-solid-state pH sensor consists of two half-cells: indicator electrode using the Li5YSi4O12 glass and an Ag/AgCl reference electrode coated with Nafion film. A stable Nafion film was achieved by heat treating at 100 °C for 1 h. The electromotive force (EMF) of the all-solid-state pH sensor decreased linearly with pH increase in water in accordance with the Nernst's equation. The all-solid-state pH sensor operated stably up to 80 °C. The sensitivity of the all-solid-state pH sensor against pH was high, and the EMF was also scarcely influenced by the presence of inorganic ions such as Li+, Na+ and Cl−. It was practically confirmed by the pH titration test that the all-solid-state pH sensor behaved similar to the commercial pH meter with the conventional glass electrode. In addition, the all-solid-state pH sensor showed same equivalence point both at high temperature and low temperature operations.
Journal: Ceramics International - Volume 35, Issue 8, December 2009, Pages 3057–3060