制备条件对钛基IrO2+Ta2O5涂层阳极性能的影响

研究了基体喷砂处理，涂制母液溶剂体系，添加剂等制备技术对热分解法制备钛基IrO2 Ta2O5阳极组织结构，性能的影响，结果表明，基体经喷砂处理后与氧化物涂层间的结合力加大，其阳极寿命明显提高，采用有机溶剂制备的涂层表现出典型的裂纹形貌，且晶粒细化，增大了阳极的电化学活性表面，从而提高了阳极的析氧电催化活性，加入适量添加剂可以改善涂层的致密度，能够有效地抑制活性组元的溶解，并阻止电解液在涂层中的渗透，延长了阳极的使用寿命，实验表明，添加剂含量为0．7％时改善效果最为明显。

EFFECT OF PREPARATION CONDITIONS ON THE PROPERTIES OF Ti BASED IrO2+Ta2O5 ANODES

Effects of sand-blasting of base metal, solvent system of precursor and additive on the morphologies and properties of Ti/(IrO2 Ta2O5) anodes prepared by thermo-decomposition have been investigated. It is shown that the adhesion between oxide coating and Ti base increases after sandblasting of the base, thereby enhancing the service life of anodes. A typical morphology of cracks was resulted from an organic solvent employed. Moreover, the crystallite grains of the oxide coating became finer, which resulted in increasing of electrochemically active surface area and an improvement of electrocatalytic active for oxygen evolution. By adding a certain additive into precursor, the compact of coating was increased, efficiently preventing from the penetration of electrolyte through the coating and the dissolution of active component in the oxide layer. Thus the service life of anodes increased. It was indicated that the durability strengthened most significantly at the additive content of 0.7% (mass fraction).