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| 1 | Effect of heat treatment of titanium substrates on the properties of IrO_2-Ta_2O_5 coated anodes显示文摘The Ti substrates of IrO 2 -Ta 2 O 5 coated anodes were treated by solid-solution and aging, stress relieving annealing, and recrystallization annealing, and the coatings were prepared by thermal decomposition of a mixture of H 2 IrCl 6·6H 2 O dissolved in hydrochloric acid and TaCl 5 dissolved in alcohol. Scanning electron microscopy (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and accelerated life test (ALT) were employed to study the microstructure and electrochemical properties of the anodes. Compared with the anode without heat treatment, the anodes with heat treatment are of higher electrochemical activity and longer accelerated life; especially, the anode with recrystallization annealing treatment has the best electrochemical properties and the longest accelerated life. | YAN Zhenwei MENG Huimin | 2011 | Rare Metals2011，30，5： | 5 |
| 2 | Degradation characteristics of Ti/(IrO_2+Ta_2O_5) coating anodes in H_2SO_4 solution显示文摘The service life of Ti based IrO 2+Ta 2O 5 coating anodes over the whole composition range and prepared at different temperatures was studied by the accelerated electrolysis tests. The results show that as a result of incompleted decomposition, coatings obtained at low temperature are not stable. At the preparing temperature up to 450 ℃,the stability of the resulting deposits increase dramatically, and is independent on temperature. However, at higher temperature, oxidation of Ti base occurred leading to a decrease in the adhesion of coatings which resulted in decreasing of the service life of anodes. The maximum durability was obtained for the anodes prepared at 450 ℃.Resulting from the maximum solubility between the iridium and tantalum oxides, coatings with 70%IrO 2+30%Ta 2O 5 (mole fraction) exhibited the maximum stability. A preferential dissolution of Ir on the non close packed planes of the rutile oxides was observed for the pure IrO 2 deposits while on the close packed planes for the IrO 2 and Ta 2O 5 mixed ones in electrolysis. This dissolution characteristic can interpret a low service life for the coating anodes with a low IrO 2 content since the close packed planes orientations are dominant in these flesh samples. Two mechanisms for the degradation of Ti/(IrO 2+Ta 2O 5) anodes were also proposed. | 胡吉明 吴继勋 孟惠民 孙冬柏 朱艳冗 杨德钧 | 2000 | 中国有色金属学会会刊:英文版2000，10，4： | 2 |
| 3 | 酸刻蚀处理对IrO_(2)-Ta_(2)O_(5)/Ti阳极寿命的影响显示文摘通过改变腐蚀方法,研究了使用HCO和HSO进行钛基体表面刻蚀对金属氧化物钛阳极电化学性能和表面形貌的影响。采用扫描电子显微镜、X射线衍射仪和光电子能谱等测试方法对样品进行了结构分析。然后利用电化学工作站测试了样品的电催化活性,利用加速寿命测试研究了样品的电化学稳定性。结果表明,通过HCO和HSO分步腐蚀可以获得更加均匀致密的表面形貌和更好的催化稳定性。在此基础上,进一步研究了预处理对钛阳极寿命的影响原因。IrO-TaO/Ti阳极的催化活性和稳定性与酸刻蚀处理的先后顺序及表面结构密切相关,并建立了预处理方法与阳极性能之间的关系。分步腐蚀使钛表面具有合适的粗糙度,因而提升了涂层附着力。在热分解过程中,经分步腐蚀形成的氢化钛在不改变表面形貌的情况下转变为金红石结构的氧化钛,有利于电子输运,从而增强涂层附着力并延长加速寿命。 | 冯庆 王快社 闫爱玲 郝小军 贾波 柴作强 宋克兴 | 2022 | 稀有金属材料与工程2022，51，7： | 0 |
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