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硫是钢铁生产中的有害元素之一,精确测定和在线检测熔融金属中的硫含量是钢铁冶金过程中一项至关重要的任务。固体电化学原理是一种测量熔融金属中硫含量的精确方法。然而,到目前为止,还没有找到一种化学性质稳定和离子电导率高的硫化物固体电解质材料,因此,人们将常用的固体电解质材料(如ZrO2基固体电解质和-βAl2O3等)与化学性质相对稳定的硫化物辅助电极相结合进行间接测硫。在一些情况下,无需将固体电解质材料与辅助电极结合,而直接使用-βAl2O3也可用于测硫,辅助电极是在测硫过程中在固体电解质与辅助电极界面原位生成的。简要回顾了这些固体电化学间接测硫所使用的方法和材料。
Sulfur is one of the harmful elements in steel production. Accurate determination and on-line detection of sulfur in molten metal are a crucial task in the metallurgical process. The solid-state electrochemical principle is an accurate method of measuring the sulfur content of molten metals. However, up to now, no stable chemical solid electrolyte material with high ionic conductivity has been found. Therefore, the commonly used solid electrolyte materials (such as ZrO2-based solid electrolyte and -βAl2O3) have been chemically modified Stable sulfide auxiliary electrode combined with indirect sulfur measurement. In some cases, it is not necessary to combine the solid electrolyte material with the auxiliary electrode, and direct use of -βAl2O3 can also be used to measure sulfur. The auxiliary electrode is generated in-situ at the solid electrolyte and auxiliary electrode interface during sulfur measurement. This review briefly reviews the methods and materials used to measure sulfur indirectly by these solid electrochemical methods.