The main objective of this study is the synthesis, use, and reuse magnetic copper ferrite nanospheres (CFNS) for extra-heavy oil viscosity reduction. CFNS were synthesized using a solvothermal method resulting in mean particle size 150 nm. Interactions with crude evaluated through asphaltene adsorption isotherms, as well static dynamic rheology measurements two cycles at 25 °C. Adsorption desor...

Abstract The experimental study of the phase equilibria between calcium ferrite slag, metallic copper, spinel and/or dicalcium in Cu 2 O-FeO x -CaO system has been carried out. Effects temperature, oxygen partial pressure and Fe/CaO ratio on assemblages compositions have estimated. advanced technique including high-temperature equilibration primary substrates, rapid quenching samples quantitati...

The semiconductor spinel ferrite will have the chemical formula as AB2O4 (where A  divalent metal ion like Ni, Mn, Zn, etc and B  Iron metal ion Fe2 + and Fe3 +) and many studies have focused on the synthesis of nanomaterials because of extensive applications due to their novel properties. Magnetite and spinel ferrite nanocrystals are regarded as two of the most important inorganic nanomateri...

Plans for the next generation of electron-positron colliders (B-factories and B-factory-like machines) call for high beam currents to produce luminosities of the order of 1033. To store these high currents in a machine, special attention must be paid to the interaction of the beam with discontinuities in the surrounding vacuum chamber. RF cavities are among the biggest perturbations in accelera...

In this work, a functionally graded material (FGM) part was fabricated by depositing Cu-based alloy on top of high strength low (HSLA) steel twin-wire and arc additive manufacturing (T-WAAM). Copper parts are interest in many industries since they can combine thermal/electrical conductivity, wear resistance with excellent mechanical properties. However, mixing copper is difficult due to mismatc...

Copper ferrite nanospheres (CFNS) were prepared by a solvothermal method and they calcined at different temperatures ranging from 200?600 °C, resulting in CFNS-based materials with both surface chemistry structural features, which play crucial role the electrocatalytic activity of carbon black-containing CFNS catalysts towards oxygen reduction reaction (ORR). The study was addressed to elucidat...

In microwaves, a TE-polarized rectangular-waveguide resonator with an inserted thin ferrite disk gives an example of a nonintegrable system. The interplay of reflection and transmission at the disk interfaces together with the material gyrotropy effect gives rise to whirlpool-like electromagnetic vortices in the proximity of the ferromagnetic resonance. Based on numerical simulation, we show th...