Study about TiO2/Nb2O5 Composite Electrode Thin Films for Photovoltaic Applications | Chapter 10 | Fundamental Research and Application of Physical Science Vol. 9

 Nanopowders maybe defined as grated materials with individual pieces in nanometer scale or materials accompanying crystalline in nanometer scale. Nanoparticles (NPs) are containing a large amount of atoms or molecules shackled with each one with a total magnitude varying from 1 nm to around 100 nm. Due to their very limited sizes, NPs possess an remarkably high surface district-to-volume ratio, that changes their physical-synthetic properties distinguished to their macroscale counterparts. Nano sized powders of TiO2 (titanium dioxide) and Nb2O5 (Niobium (V) group of chemical elements) were used to fabricate TiO2/Nb2O5 composites thin films by EPD (electrophoretic dethroning) technique. In an EPD container, pellets of magnesium nitrate hexahydrate and metal oxide powders were pensile in propan-2-ol. 1.2 cm apart, the electrodes were doused in the suspension accompanying a DC potential supplied across them. Through optic examination and reasoning of UV-Vis-NIR spectrophotometer spectra, key EPD process parameters, containing as the applied DC energetic field, deposition event, and solid concentration in delay, were improved. The films accompanying deposition periods of 90 s, powder concentrations of 0.01 g/40 mL, and direct current (DC) voltage of 35 V had the maximum transmittance (55%) of all the samples. XRD micrographs rooted that TiO2 and Nb2O5 particles were bestowed in the composite film. SEM (scanning power microscope) micrographs of the composite electrode thin films showed that absorbent films of high quality accompanying well controlled makeup were deposited by using the EPD method.

Author(s) Details:

John Njagi Nguu,
Department of Physics, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya.

Bernard Odhiambo Aduda,
Department of Physics, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya.

Francis Wanjala Nyongesa,
Department of Physics, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya.

Robinson Juma Musembi,
Department of Physics, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya.

Please see the link here: https://stm.bookpi.org/FRAPS-V9/article/view/11767

Synthesis, Characterization and Optimization of Electrophoretic Deposition (EPD) Parameters of YSZ Layer on Ti-6Al-4V Alloy substrate: A Recent Study | Chapter 06 | Recent Trends in Chemical and Material Sciences Vol. 8

 The purpose of this study is to see how different EPD parameters (voltage, duration, and concentration) affect the thickness, porosity, and coating characterizations of a YSZ layer on a Ti-6Al-4V alloy substrate while utilising DC current. To determine the optimal conditions for EPD, the Taguchi method was utilised, and several criteria were applied to deposit biological coatings. Yttria stabilised zirconia powder (YSZ) was electrophoretically coated on Ti-6Al-4V alloy substrate using ethanol as a solvent under DC to improve the alloy surface quality and match the requirements of biological orthopaedic application activity. Ethanol was utilised as a solvent to precipitate chitosan and YSZ on the metal substrate. The surface composition and cross section of coatings have been reported using electrode-enabled cathodic deposition for characterisation. To characterise the surface morphology of the YSZ layer, a variety of tests and inspections were carried out, including zeta potential, water contact angle, XRD, SEM, and optical microscopes. 40 volts, 2 minutes, and 1 g/l suspension at room temperature were the optimal conditions for YSZ layer deposition. The contact angles of the coatings were varied between hydrophilic 67.489C and hydrophobic 35.914 C. With pores ranging in size from 56.601 to 83.505 m, appropriate percentages of porosity were attained.

Author(S) Details

Ayad Naseef Jasim
Department of Materials Engineering, College of Engineering, University of Diyala, Iraq.

Muna khethier Abbass
Department of Production Engineering and Metallurgy, University of Technology, Baghdad, Iraq.

Mohammed Jasim
Department of Production Engineering and Metallurgy, University of Technology, Baghdad, Iraq.

Khawla Salah
Application Science Departments, University of Technology, Iraq.

View Book:- https://stm.bookpi.org/RTCAMS-V8/article/view/6539