The Presented Study of Zn-Cu Ferrites for Their Application in “Photocatalytic Activities”

The present chapter summarizes the synthesis and characterization of Zinc Copper (ZnCu) ferrites due to their wide range of applications in many areas. ZnCu ferrites are soft magnetic materials that have exceptional electrical, magnetic, and optical properties. ZnCu ferrites possess high resistivity, permeability, permittivity, saturation magnetization and low power losses, and coercivity. The above features of ZnCu ferrites find application in designing transformers, transducers, and inductors. Ferrites are also used in magnetic fluids, sensors, and biosensors. Apart from these advantages, they play a vital role in practical appliances like mobile, laptops, mobile chargers, refrigerators, washing machines, microwave ovens, printers, and so on. Therefore, the present focus is on the literature of techniques of the synthesis, their characterization, the effect of doping on the behavior of ZnCu ferrite, and, finally, their potential application in technology.

“Ferrites”: Synthesis, Structure, Properties and Applications

Ferrites synthesis method and characterization techniques are attracting huge attentions of researchers because of their wide scope of uses in numerous areas. The ferrites include high resistivity, saturation magnetization, permeability, coercivity and low power losses. The above-mentioned useful ferrites characteristics make them appropriate for use in different applications. These ferrites are used in biomedical field for cancer cure and MRI. Electronic applications are transformers, transducers, and inductors which are also made using ferrites and also used in making magnetic fluids, sensors, and biosensors. Ferrite is a profoundly helpful material for many electrical and electronic applications. It has applications in pretty much every domestic device like LED bulb, mobile charger, TV, microwave, fridge, PC, printer, etc. This review mainly focus on the synthesis method, characterization techniques, and implementation of FNPs. This Chapter presents various methods used for ferrites preparation with distinctive examples, their advantages as well as limitations in detail. Ferrites properties like structural, optical, electrical and magnetic with their characterization techniques and various applications in the areas of biomedical, electronics, and environment are also discussed.

METHOD OF RESEARCH ON THE DYNAMIC VISCOSITY OF MAGNETIC FLUIDS AT HIGH SHEAR RATE

Magnetic fluids have an important position in the design of technical systems due to their unique properties. They are used primarily in mechanical energy dissipation systems, i.e. brakes and vibration dampers, as well as in the design of seals. In many applications, the magnetic fluid operates at high flow velocities through narrow slots. Therefore, there is a need to determine the rheological properties of this type of substance at high shear rates. Due to the high density of magnetic fluids and the associated occurrence of mass forces, as well as the requirements regarding the distribution of the magnetic field, the measurement of the viscosity of magnetic fluids at high shear rates is extremely difficult when conventional measuring systems are used. The paper presents a proposal for a new measuring system and a method to determine the viscosity of magnetic fluids at high shear rates, as well as the results of research on the possibility of using the presented structure in the case of ferrofluids.