Anodic Oxide Films on Niobium and Tantalum in Different Aqueous Electrolytes and Their Impedance Characteristics

被引：6

作者：

Verma, N. ^{[1
]}

Singh, K. C. ^{[1
]}

Mari, B. ^{[2
]}

Mollar, M. ^{[2
]}

Jindal, J. ^{[1
]}

机构：

[1] Maharshi Dayanand Univ, Dept Chem, Rohtak 124001, Haryana, India

[2] Univ Politecn Valencia, Dept Fis Aplicada, Inst Disseny Fabricac Automatitzada, Cami de Vera S-N, E-46022 Valencia, Spain

来源：

ACTA PHYSICA POLONICA A | 2016年 / 129卷 / 03期

关键词：

SOL-GEL PROCESS; SELF-ORGANIZED NIOBIUM; ELECTRICAL-PROPERTIES; THIN-FILMS; DIELECTRIC-PROPERTIES; ACID SOLUTION; NB2O5; SPECTROSCOPY; CRYSTALLIZATION; ANODIZATION;

D O I：

10.12693/APhysPolA.129.297

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The anodic oxide films were prepared on the niobium and tantalum in aqueous electrolyte mixtures containing 1 M CH3COOH + 1 M H3PO4 or 1 M CH3COOH + 1 vol.% HF or 1 M CH3COOH + 1 M H3PO4 + 1 vol.% HF at 30 V for 30 min. The barrier films were obtained on both niobium and tantalum surfaces in all electrolyte mixtures except niobium oxide film formed in 1 M CH3COOH + 1 vol.% HF which is porous in nature. The anodic oxide films were characterized by FESEM. Also, electrochemical impedance spectroscopy at open-circuit potential on Nb and Ta was applied and obtained data were analyzed by fitting with four different equivalent circuits.

引用

收藏

页码：297 / 303

页数：7

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