RuO_2、IrO_2和Ta_2O_5多元氧化物涂层阳极的研究  

PREPERATION AND PERFORMANCE OF ANODE COATINGS OF MULTI-OXIDES RuO_2 IrO_2 AND Ta_2O_5

作　　者：沈承金[1] 欧雪梅[1] 赵宇龙[1] 

机构地区：[1]中国矿业大学材料学院,徐州221008

出　　处：《腐蚀科学与防护技术》2006年第4期252-254,共3页Corrosion Science and Protection Technology

基　　金：江苏省自然科学基金(BK2005020);中国矿业大学校基金项目

摘　　要：采用H2IrCl6·H2O、RuCl3·3H2O、TaCl5及添加剂组成的复合溶液，利用溶胶-凝胶法工艺在钛基体和预镀钽的钛钽表面氧化烧结形成活性RuO2、IrO2和Ta2O5组成的多元金属氧化物涂层阳极，制备了混合金属氧化物涂层并对制备工艺及其对氧化物涂层结构和化学成分的影响进行了研究，结果表明，H2IrCl6·H2O的含量对氧化物涂层和涂层结合力有直接影响，在IrO2（H2IrCl6·H2O当量换算）含量达到7％～8％（mass）时，涂层的孔隙率出现了最低值；当热氧化烧结温度在400℃～500℃时，涂层的孔隙率出现了最低值；在钛基体预镀钽后再热分解形成RuO2、In和Ta2O5涂层的表面裂纹较直接形成混合金属氧化物涂层的少．In this article the synthesis technology as well as the structure and composition of an anode coating of mixed metal oxides are studied. The coating consisting of RuO2、IrO2 and Ta2O5 is synthesized by a sol-gel procedure with the solution consisting of H2IrCl6·H2O、RuCl3·3H2O、TaCl5 and additives. The results showed that the structure and composition of the coating of the mixed metal oxides are affected directly by H2IrCl6·H2O contents and sintering temperature. The pore ratio of the coating shows a minimum when the IrO2 contents is 7 % - 8 % （mass）, and the pore ratio of the coating shows also a lowest plateau when the sintering temperature is between 400 ℃ and 500 ℃, The number of cracks of the coating on titanium may be lowered by pre-plated a thin tantalum film before the solgel coating process.

关 键 词：混合金属氧化物 阳极 涂层 

分 类 号：TG172[金属学及工艺—金属表面处理]