排序方式: 共有4条查询结果,搜索用时 0 毫秒
1
1.
3.
We put forward a method of rapid preparation of chloride selective electrode (Ag/AgCl electrode) by dipping silver wire into sodium hypochlorite solution. The electrodes were prepared through different immersion time. The properties of the electrodes, such as Nernst response, response time and long-term stability, were tested in simulated concrete pore solutions (SCPS). Moreover, the surface morphology of the electrodes was also detected after immersion in solutions over three months. The experimental results reveal that the Ag/AgCl electrode with the fabrication time of 20 minutes (E-20) which is recommended to work as the chloride ion selective electrode has the best performance. Compared to that fabricated by the electrolytic process (E-EP), E-20 can be manufactured in mass. The method has almost the same good performance of Nernst response as E-EP, and has a better response time which is less than 25 seconds. The method also shows a better good long-term stability in SCPS containing chloride ions over three months. 相似文献
4.
为提高水泥基材料的导电性,制备了石墨烯水泥基复合材料。利用四电极法测试复合材料的电导率,研究石墨烯掺量、水灰比、养护龄期和含水量对体系电导率的影响。并通过扫描电子显微镜(SEM)观察复合材料的微观形貌。结果表明:体系电导率随石墨烯掺量的变化符合渗流理论,进一步运用Logistic函数来描述石墨烯水泥基复合材料电导率与石墨烯掺量的关系。微观分析表明体系的电导率主要取决于水泥基体中石墨烯的分布和接触情况。当石墨烯掺量超过渗流阈值后,养护龄期和含水量对体系电导率影响不大。 相似文献
1