Wagner极化法对熔渣电子电导的研究  

STUDY OF ELECTRONIC CONDUCTIVITY OF MOLTEN SLAGS WITH Wagner POLARIZATION TECHNIQUE

作　　者：鲁雄刚[1] 丁伟中[1] 李福燊[2] 李丽芬[2] 周国治[2] 

机构地区：[1]上海大学钢铁冶金新技术开发应用重点实验室,上海200072 [2]北京科技大学固体电解质冶金测试国家专业实验室,北京100083

出　　处：《金属学报》2001年第2期184-188,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金重点资助项目59874004;国家973重大基础研究项目 G1998061500;上海市青年科技启明星计划资

摘　　要：利用Ｗａｇｎｅｒ极化法对ＣａＯ－ＳｉＯ２－Ａｌ２Ｏ３－ＦｅＯｘ熔渣体系的电子电导进行了测定．研究表明，熔渣的电子电导包含自由电子电导和电子空穴电导两部分，它们分别由渣相中的Ｆｅ３＋及Ｆｅ２＋浓度所确定．随着渣相的温度升高， Ｆｅ３＋转变为Ｆｅ２＋，自由电子电导逐渐减小，而电子空穴电导逐渐增大，实验还发现，在特定的温度下，不同渣系的电子电导在某一Ｆｅ３＋浓度含量存在一个最大值．在本实验条件下，电子电导率的大小处于１０－４－１０－２ Ｓ·ｃｍ－１之间．Wagner polarization technique has been used to measure the electronic conductivity of CaO-SiO2-Al2O3-FeOx slag system in this paper. The experimental results show that electronic conductivities of the slags consist of free electron conductivity and electron hole conductivity. The two conductivities are related to the content of Fe3+ and Fe2+ respectively. As experimental temperature increased, the free electron conductivity decreases, and the electron hole conductivity increases while Fe3+ changes to Fe2+. It is found that there is always a maximum electronic conductivity value at some ratio of Fe3+ content to the total iron content for different slag systems at a special temperature. Under the present experimental condition, the electronic conductivity is in the range of 10(-4)-10(-2) S(.)cm(-1).

关 键 词：WAGNER极化法 熔渣 电子电导 

分 类 号：TF01[冶金工程—冶金物理化学]