摘要
研制了一种新型的钛基铱钽涂层阳极材料，对其进行了结构及电化学性能的测试．测试结果证实，在最后烧结成型的电极涂层组分中，铱元素以结晶态的二氧化铱形式存在，而钽元素则以非晶态的形式存在，涂层外貌与经酸蚀刻后的钛基体外形相一致．涂层无龟裂，呈纳米级的细晶粒堆集．电极可应用于酸性介质的析氧反应．在 ０．２５ ｍｏｌ／Ｌ的 Ｈ２ＳＯ４溶液中，在 ２．０× １０４Ａ／ｍ２的高电流密度下，每平方米电极承载的电量可以高达 １３６．８ ＧＣ．这种新型电极材料已在显象管玻壳模具镀铬，以及用离子膜法生产四甲基氢氧化铵等方面得到了实际应用．
A new IrO2. Ta2O5 coated Ti-base anode material has been developed, with its structure and electrochemical properties tested. The test results have proved that in the coat of the finished electrode, Ir exists in the form of crystaline IrO2, while Ta is presented as amorphous Ta2O5. The coat, with its surface:morphology conforming with that of Ti base material etched with an acid, is built up with nano-level fine grains and without any chaps. The electrode can be used in oxygen evolving reactions in acidic media. Under the conditions of 0. 25 mol/L H2SO4 solution and a high current density of 2.0×104A/m2, the electric quan- tity crried by the electrode is up to 136.8 GC/m2. The new electrode material has been ap- plied in several fields such as chromic-plating of mould for casting kinescope (shell section and shell head) and the production of tetramethylammonium hydroxide by ionic exchange membrane process.
出处
《广东有色金属学报》
2000年第1期41-46,共6页
Journal of Guangdong Non-Ferrous Metals
