{"title":"溶剂和温度对0.1 M EDTA(钠盐)中Nb形成阳极氧化膜的影响:扫描电镜研究","authors":"V. Jeevanajyothi, C. Anjaneyulu","doi":"10.7598/cst2018.1551","DOIUrl":null,"url":null,"abstract":"Anodization of Nb in 0.1 M EDTA (Sodium salt) has been carried out. Kinetics of anodic oxidation of Nb has been studied at a constant current density of 8 mA. cm and at room temperature. The plots of formation voltage vs. time, reciprocal capacitance vs. time and reciprocal capacitance vs. formation voltage were drawn. From these plots, formation rate, current efficiency and differential field were calculated. The Addition of solvent (Ethylene glycol) showed better kinetic results. For 20, 40, 60 and 80% aquo-glycolic media, the dielectric constant values are low leading to the marked improvement in the kinetics. The surface morphology of the anodic films was also studied by scanning electron micrographs (SEM). Kinetics was also studied at different temperatures ranging from 273 K to 333 K at a constant current density of 8 mA cm. It was observed that kinetic results were found to be increasing linearly with the decrease in temperature","PeriodicalId":10087,"journal":{"name":"Chemical science transactions","volume":"646 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2018-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of Solvent and Temperature on the Anodic Oxide Films Formed on Nb in 0.1 M EDTA (Sodium Salt): Scanned Electron Micrograph Studies\",\"authors\":\"V. Jeevanajyothi, C. Anjaneyulu\",\"doi\":\"10.7598/cst2018.1551\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Anodization of Nb in 0.1 M EDTA (Sodium salt) has been carried out. Kinetics of anodic oxidation of Nb has been studied at a constant current density of 8 mA. cm and at room temperature. The plots of formation voltage vs. time, reciprocal capacitance vs. time and reciprocal capacitance vs. formation voltage were drawn. From these plots, formation rate, current efficiency and differential field were calculated. The Addition of solvent (Ethylene glycol) showed better kinetic results. For 20, 40, 60 and 80% aquo-glycolic media, the dielectric constant values are low leading to the marked improvement in the kinetics. The surface morphology of the anodic films was also studied by scanning electron micrographs (SEM). Kinetics was also studied at different temperatures ranging from 273 K to 333 K at a constant current density of 8 mA cm. It was observed that kinetic results were found to be increasing linearly with the decrease in temperature\",\"PeriodicalId\":10087,\"journal\":{\"name\":\"Chemical science transactions\",\"volume\":\"646 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2018-10-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chemical science transactions\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.7598/cst2018.1551\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical science transactions","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.7598/cst2018.1551","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
在0.1 M EDTA(钠盐)中进行了铌的阳极氧化。研究了铌在恒电流密度为8ma时的阳极氧化动力学。Cm和室温下。绘制了地层电压与时间、电容与时间、电容与地层电压的关系图。从这些图中，计算出地层速率、电流效率和差分场。溶剂乙二醇的加入表现出较好的动力学效果。对于20%、40%、60%和80%的水乙醇介质，介电常数值较低，导致动力学显著改善。用扫描电子显微镜(SEM)研究了阳极膜的表面形貌。在273 K至333 K的温度范围内，以8 mA cm的恒流密度研究了动力学。观察到，随着温度的降低，动力学结果呈线性增加
Effect of Solvent and Temperature on the Anodic Oxide Films Formed on Nb in 0.1 M EDTA (Sodium Salt): Scanned Electron Micrograph Studies
Anodization of Nb in 0.1 M EDTA (Sodium salt) has been carried out. Kinetics of anodic oxidation of Nb has been studied at a constant current density of 8 mA. cm and at room temperature. The plots of formation voltage vs. time, reciprocal capacitance vs. time and reciprocal capacitance vs. formation voltage were drawn. From these plots, formation rate, current efficiency and differential field were calculated. The Addition of solvent (Ethylene glycol) showed better kinetic results. For 20, 40, 60 and 80% aquo-glycolic media, the dielectric constant values are low leading to the marked improvement in the kinetics. The surface morphology of the anodic films was also studied by scanning electron micrographs (SEM). Kinetics was also studied at different temperatures ranging from 273 K to 333 K at a constant current density of 8 mA cm. It was observed that kinetic results were found to be increasing linearly with the decrease in temperature
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