共查询到12条相似文献,搜索用时 109 毫秒
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铜在氨水介质铁氰化钾抛光液中CMP的电化学行为研究 总被引:3,自引:1,他引:2
应用电化学测试技术研究了介质浓度(包括pH值)和成膜剂浓度对铜表面成膜及铜抛光过程的影响,探讨了成膜厚度及其致密性与抛光压力、抛光转速的关系,考察了压力及转速对抛光过程的作用,找出影响抛光过程及抛光速率的电化学变量。用腐蚀电位及腐蚀电流密度的变化解释了抛光过程的电化学机理,通过成膜速率及除膜速率的对比得出抛光过程的控制条件。证明了在氨水溶液介质中、以铁氰化钾为成膜剂、纳米γ-Al2O3为磨粒的抛光液配方是可行的,其抛光控制条件为压力10psi、转速300r/min。 相似文献
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磷脱氧铜和不锈钢在醋酸介质中腐蚀行为的电化学研究 总被引:2,自引:0,他引:2
应用交流阻抗和极化曲线法研究磷脱氧铜和SW-206不锈钢在醋酸介质中腐蚀行为及过程的控制特征,比较介质温度,浓度及溶解氧对这两种金属在醋酸中腐行为的影响,分析其原因所在,为石油化工中的醋酸设备的正确选材及有效防腐提供实验依据。 相似文献
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应用循环伏安法和现场椭圆偏光法研究了弱碱性介质中铜的腐蚀、钝化过程,并用二组分有效介质模型对光学实验结果进行了拟合。结果表明金属铜在腐蚀达到稳态时其表面氧化膜具有一定的组成和厚度;反应生成的CuO比Cu2O更为致密,因而对基体具有更好的保护作用;CuO的阴极还原过程可能会涉及到还原中间产物Cu^+的岐化反应,该岐化反应的进行有助于铜耐蚀性的提高;CuO的还原可以在小于-0.45V(vs.SCE)的电位范围内与Cu2O的还原同时进行,椭圆偏光实验不仅与电化学和光电化学实验的结果一致,还能定量地确定膜的厚度、折射率等性质;并根据有效介质模型,可以计算得到不同时刻电极表面膜组成的改变;从而为研究电极反应机理提供新的证据。 相似文献
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A. Bristoti I. R. Bonilla P. da R. Andrade 《Journal of Thermal Analysis and Calorimetry》1976,9(1):93-99
K4Fe(CN)6·3H2O was studied by a derivatograph in the temperature range +20° to +300° and dielectric constant () measured from –80° to +150°. The loss of the three water molecules occurs at 105° and the vs T curve shows a Debye relaxation behavior. By using Mason's theory it was possible to classify K4Fe(CN)6·3H2O in the temperature range –25° to +100° C as a para-electric order-disorder crystal.
Work partially supported by Banco Nacional de Desenvolvimento Econômico and Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul.
P. da R. Andrade deceased on December 16, 1974. 相似文献
Zusammenfassung K4[Fe(CN)6].3 H2O wurde mit dem Derivatograph im Temperaturbereich von+20° bis+300° untersucht und die dielektrische Konstante () im Bereich von –80° und +150° gemessen. Die Abspaltung der drei Wassermoleküle erfolgt bei 105°. Die Kurve von als Funktion vonT zeigt ein Relaxationsverhalten nach Debye. Bei Anwendung der Theorie von Mason gelang es K4[Fe(CN)6].3 H2O im Temperaturbereich von –25° bis 100° als para-elektrischen, geordneten-ungeordneten Kristall einzuordnen.
Résumé Etude de K4Fe(CN)6·3H2O à l'aide d'un «Derivatograph» entre +20 et +300° mesure de la constante diélectrique () entre –80 et+150°. La perte des trois molécules d'eau a lieu à 105° et la courbe en fonction deT montre un comportement de relaxation Debye. D'après la théorie de Mason, il est possible de classer K4Fe(CN)6·3H2O comme cristal paraélectrique ordre-désordre entre –25 et +100°.
K4[Fe(CN)6] · 3H2O +20° +300° –80° +150°. 105°, -T . , , K4[Fe(CN)6] · 3H2O –25° +100° .
Work partially supported by Banco Nacional de Desenvolvimento Econômico and Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul.
P. da R. Andrade deceased on December 16, 1974. 相似文献
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硫醇在金电极上的SA单分子层膜的电化学研究 总被引:14,自引:0,他引:14
金基底上的硫醇自组装单分子层膜(Self-asembledmonolayers,SAMs)具有良好的稳定性和有序性,因此在基础研究及应用技术等领域都受到了广泛的重视[1].通过电化学方法测定自组装膜对溶液中电活性物质的异向电子转移的阻碍作用. 相似文献
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S. Ganguli S. Das M. Bhattacharya 《Journal of Radioanalytical and Nuclear Chemistry》1998,232(1-2):229-231
A simple method to prepare57Fe enriched K4[Fe(CN)6] and K3[Fe(CN)6] is described. The yields of the products are much better than those reported in the literature so far. The enrichment is essential for57Fe Mössbauer investigation in a variety of Prussiate type complexes and other inorganic compounds which are conveniently prepared from K4[Fe(CN)6] and K3[Fe(CN)6]. K4[Fe(CN)6] was obtained by reacting freshly prepared Fe(OH)3 with glacial acetic acid and treating with iron acetate in boiling aqueous solution of KCN. The novel feature of the procedure to obtain K3[Fe(CN)6] is that the oxidation of K4[Fe(CN)6] has been carried out in the solid state by passing chlorine gas over the powdered specimen. K3[Fe(CN)6] was crystallised from alkaline solution of this oxidised powder. The compounds were characterised by Mössbauer spectroscopy. 相似文献
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A planar structure of an anion cluster I- x (H2O)6 in a 3D supramolecular complex [Ru(bpy)3]2[I x (H2O)6Fe(CN)6 x H2O] has been determined by single-crystal X-ray analysis. In the supramolecule, the anion cluster I- x (H2O)6, together with the anion [Fe(CN)6 x H2O]2-, acts as a 3D crystal host, and the [Ru(bpy)3]2+ cations, as the guest molecules, occupy the vacancies of the 3D host framework. This is the first crystal example of the anion cluster I- x (H2O)6. 相似文献