Magnetopolymer Composites With Soft Magnetic Ferrite Filler

Abstract

Thanks to their good magnetic properties, NiZn ferrites can be used as the soft magnetic filler in magneto-polymer composites. The ferrites having general composition ( , 0.33, 0.36, 0.42, and 0.50) were prepared by means of ceramic method and the magnetic properties, such as initial permeability and Curie temperature were investigated. The sample with composition having and was chosen as the filler for magneto-polymer composites. The aim of the work was the study of preparation and properties of magnetic polymer composites based on natural rubber SMR 20 in a wide range of concentrations (0-600 phr). The influence of ferrite content on magnetic, physical-mechanical and rheological properties of prepared composites was investigated. The effect of the concentration of ferrite filler on the complex permeability of the composites in the frequency range from 10 MHz to 3 GHz as well as the physical-mechanical and rheological properties is evident.

Evolution of thermal properties of natural rubber nanocomposites functionalized by nickel–zinc ferrite and potassium strontium niobate nanopowders

“…One reason for the differentiated properties presented by the nanoscale is the distinct surface/volume proportion or aspect ratio that is not linear for different dimensional scales [1,2]. In general, the choice of polymer as a matrix or continuous phase is preferable since most have appreciable thermal and mechanical properties, and the natural rubber is a desirable candidate owing to its distinctive ability to incorporate large amounts, up to 600 phr, of solid and inert particles, maintaining acceptable mechanical properties [3,4].…”

“…Some typical examples of polymer/ceramic composites and nanocomposites of technological interest are: (1) composites formed by paraelectric particles of Ba 0.6 Sr 0.4 TiO 3 with different size and particle concentration dispersed in a low-loss dielectric matrix that can be applied in microwave devices for wireless telecommunications [5]; (2) hybrid composites based on ferroelectric and piezoelectric crystal particles, randomly distributed in a polymer matrix of epoxy resin represent a novel class of materials with potential to be applied as integrated capacitors, acoustic emission sensors, smart skins and leakage current controllers [6]; (3) carbon nanotubes and carbon black embedded in thermoplastic and elastomeric matrices producing significant mechanical, electric, anti-aging and thermal improvements in the composites and nanocomposites making them suitable for production of automobile pieces, footwear and use in pneumatic industries [7,8]; and (4) magnetic composite and nanocomposites based on ferrites, iron and nickel oxides in concentrations of up to 600 phr dispersed in polymeric matrices that can be used as flexible microwave absorbers, in wireless data communication, in local area network, satellite television and heating systems [3,9,10].…”

Analysis of a reverse hybrid hysteresis motor using hyperbolic modelling of hysteresis loop

“…1, both arms of a coil are involved in the MMF production in the RHFHM structure, whereas only one arm is useful in the AFHM and RFHM. This means the optimum use of the winding coils. While the torque value of the hysteresis motor is proportional to the hysteresis material volume [1, 3–7], but the RHFHM structure has more output torque than both the conventional axial and radial machines. The core loss in the RHFHM structure is less than the conventional axial and radial ones, especially at high frequencies because the electrical conductivity of the ferrite core compared to the steel sheet is negligible [17–19]. With respect to the above‐mentioned studies, the RHFHM structure is more efficient than the other types with the same apparent power.…”

Heavily loaded ferrite-polymer composites to produce high refractive index materials at centimetre wavelengths

“…Although there have been many investigations into ferrite-powder-polymer composites, 12,13 it is rare that PTFE (Polytetrafluoroethylene) is chosen as the matrix material. PTFE is unusual when compared with other common polymers, such as nylon, Perspex, PPS (polyphenylene sulphide), and polypropylene, due to its ability to form a compact solid when the powdered form is compressed While the production of low volume fraction (below 50% vol.)…”