离子导电砂浆电学性能影响因素研究

On the Factors that Affect Electrical Performance of Ion-Conductive Mortar

用电解质溶液作为导电相材料来制备离子导电砂浆,在砂浆表面辊涂环氧树脂以保证稳定的导电性,并对影响离子导电砂浆电学性能的多种因素开展试验研究.结果表明:在一定的离子溶液质量分数范围内,离子导电砂浆电阻率随离子溶液质量分数的增加而减小;受离子导电砂浆内部孔结构和溶质溶解度的影响,质量分数过高的离子溶液会降低离子导电砂浆的渗透效率,对离子导电砂浆导电性不利.不同离子溶液的溶质溶解度不同,因此离子导电砂浆最优导电性所对应的溶液质量分数也有所不同.在制作离子导电砂浆时应综合当时的环境温度与溶液种类,确定其溶解度并选择适当的溶液质量分数.由于离子导电砂浆的电极与离子溶液之间将发生电化学反应,因此应选择交换电流密度较大的电极,并考虑电极的可逆性.

Ion-conductive mortar（ICM）was prepared by electrolyte solution instead of traditional conductive materials,such as steel fiber,cabon fiber,graphic,etc.The epoxy resin plays an important role in ensuring persistent and good electrical conductivity of ICM.Many factors affecting the ICM＇s electrical performance were studied by compared experiments.The experimental results show that the resistivity of ICM decreases with the increasing mass fraction of solution in a certain range;high mass fraction of ionic solution can reduce the efficiency of permeability of ICM,which is bad for its conductivity.Different kinds of solutes have different solubility so that the best conductivity of ICM corresponds to different solution mass fraction when using different ionic solution.Therefore,it＇s necessary to integrate at the ambient temperature and solution-type to determine the solubility before making ICM,eventually to select the appropriate mass fraction of solution.The electrodes of ICM should select the larger exchange current density,and take into account the reversibility of electrodes.