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Sep 30, 2018Open    AccessArticle

Preparation and Study of Dielectric and Electrical Conductivity of Ba5NdTi3V7O30 Ceramics

Jagatananda Panda, Bana Bihari Mohanty, Priyadarshini Sanghamitra Sahoo, Ram Naresh Prasad Choudhary
Ba5NdTi3V7O30 is a tungsten bronze structured ceramic sample, prepared by Solid State reaction route at high temperature (950℃). The room temperature XRD analysis confi

Mar 28, 2018Open    AccessArticle

Electrogravimetric Determination of Copper Using a Constructed Compact Electrolytic Cell

Dallatu E. Musa, Rufus Sha’Ato, Ishaq S. Eneji, Adams U. Itodo
Conventional electrolytic cells are usually cumbersome and simulated with fragile open ended glass wares such as beakers, tubes, troughs or tanks which are prone to interference and contamination. Electrolytic cell was designed by allotting dimensions for its length: 12.0 cm, breadth: 6.0 cm and height: 8.0 cm to the cell; its casing for 9.0 V power source was allotted 2.5 cm length, 2.5 cm breadth and 2

Jul 26, 2016Open    AccessArticle

The Optimization of Lead Electrodeposition from Leachant of Lead Laden Cupels

Innocencia S. Mpofu, Edwina Muleya, Washington Mutatu
Disposal of lead laden cupels is proving problematic to mining and metallurgical companies due to environmental and health issues. In this study the optimization of operation parameters for the electrode position of lead metal from acetic acid leachant was carried out. The effects of voltage, temperature, concentration, size of electrode and the effect of the space between the electrodes were investigated. Acetic acid (10%) was us

Jan 27, 2016Open    AccessArticle

Oxygen Reduction Reaction (ORR) on Platinum Coated Nafion Membrane: Effects of Synthesis Conditions

Sakineh Chabi, Mehdi Kheirmand
The present study describes the catalytic activity of the platinum coated Nafion membranes towards oxygen reduction reaction in proton exchange membrane fuel cells. In contrast to the conventional three layered structures of the gas diffusion electrode, as-made gas diffusion electrodes are two layered in which the platinum electrocatalyst are deposited directly onto the Nafion membrane. Spin-coating method and impregnation-reduction approaches were used to synthesize Pt-coated Nafion membranes. ...

Dec 10, 2015Open    AccessArticle

Electrochemical Behaviour of Passive Films Formed on Inconels 600 and 690

Diadioly Gassama, Sana Faty
We have verified through an electrochemical technique (capacity, impedance and photo-electro- chemical measurement) and also through an analytic technique of auger spectrometry that passive films formed on inconels 600 and 690 are comprised of two layers. This has led us to establish precise links between the chemical composition of passive films formed on inconels and their electrochemical properties. The results obtained at different frequencies show the existence of two areas. The passive oxi...

Jun 19, 2014Open    AccessArticle

Formation of TiO2 Nanopores by Anodization of Ti-Films

Patricia M. Perillo,Daniel F. Rodríguez
Titania nanopores were fabricated on silicon substrate. Ti thin films (600 nm) were first deposited by radio-frequency (RF) magnetron sputtering at two substrate temperatures and then anodized in glycerol electrolytes containing NH4F. The morphology and structure were identified by means of scanning electron microscopy (SEM), X-ray diffractometry (XRD). The effect of the temperature on the Ti thin films deposited by RF magnetron sputtering and the applied voltage on nanopore morphology were inve...

Jun 18, 2014Open    AccessArticle

Determination of Carbon Oxide in Exhausts of Vehicles by Thermocatalytic Method

E. Abduraxmanov,М. М. Sultanov,G. N. Daminov,S. U. Tillayev
Selective methods of thermocatalytic determination of carbon oxide and hydrocarbons in exhaust gases of vehicles are based on measurement of different thermo effects of oxidation of a combustible mixture, obtained from two identical thermosensible elements working at different temperatures are developed. At one temperature there is an oxidation of all analyzed gas mixture, and on another—the mixture without a selectively determined component and by the difference of thermo effects an exact conce...