The concept of a cyclotron-resonance maser (CRM) with a ferrite loading incorporated in its waveguide is proposed. The CRM interaction occurs between the rotating electron beam and the em wave propagating along a longitudinally magnetized ferrite medium. The ferrite anisotropic permeability resembles the CRM susceptibility in many aspects, and particularly in their similar response to the axial...

Industrial water electrolysis requires highly-active and ampere-current-bearing oxygen evolution reaction (OER) catalysts, but achieving such a large operating current density at low overpotentials in available OER catalysts still remains grand challenge. Herein, we report facile conventional strategy to grow vertically non-metallic modified nickel ferrite nanosheets on Fe foam (S-NiFe2O4/IF) a...

Nickel ferrite (NiFe2O4) nanopowder has been synthesized by a sol-gel auto-combustion process and further sintered at various sintering temperatures. The samples were characterized XRD, SEM VSM. Enhancement of apparent density the sample observed with increase in temperature great influence on magnetic dielectric properties NiFe2O4. results reveal that grain size increases increasing temperatur...

Additive manufacturing (AM) is among the novel industrial technologies for fast prototyping of complex parts made from different constructional and functional materials. This review focused on phase composition additively manufactured chromium-nickel austenitic stainless steels. Being produced by conventional methods, they typically have single-phase structure, but steels could vary in AM. Comp...