Microwave versus conventional sintering: A review of fundamentals, advantages and applications

The applications of ferrimagnetic oxides, or ferrites, in the last 10 years are reviewed, including thin films and nanoparticles. The general features of the three basic crystal systems and their magnetic structures are briefly discussed, followed by the most interesting applications in electronic circuits as inductors, in high-frequency systems, in power delivering devices, in electromagnetic interference suppression, and in biotechnology. As the field is considerably large, an effort has been made to include the original references discussing each particular application on a more detailed manner.

/pdf/novel-applications-of-ferrites-kbploms6oi.pdf

Novel Applications of Ferrites

Solar water splitting for hydrogen production with monolithic reactors

The study of core@shell magnetic nanoparticles has a wide range of applications because of the unique combination of the nanoscale magnetic core and the functional shell. This report highlights some of the recent findings in the investigation of the synthesis, characterization and application of one important class of core@shell magnetic nanoparticles, i.e., magnetic nanoparticles coated with a gold shell (MNP@Au). The gold shell imparts the magnetic nanoparticles with many intriguing functional properties. Areas specifically highlighted in this report include strategies for the synthesis of MNP@Au nanoparticles, characterization of the core@shell nanostructures, and exploration of potential applications of the core@shell nanomaterials in terms of biological and catalytic interfacial reactivities. Implications of some of the research findings to address both fundamental and practical issues are also briefly discussed in an effort to further broaden the rapidly-emerging field of core@shell magnetic nanoparticles.

Core@shell nanomaterials: gold-coated magnetic oxide nanoparticles

A review on MnZn ferrites: Synthesis, characterization and applications.

The effect of Nb2O5 dopant on the structural and magnetic properties of MnZn-ferrites

At power electronic applications (e.g. in automotive, lighting, electrical equipment etc.) the inductive components that consist the heart of the power transformers are made of ceramic ferromagnetic materials of the type (Mnx ZnyFe 2+

Development of a New MnZn-Ferrite Soft Magnetic Material for High Temperature Power Applications

Microwave firing is evaluated in comparison to conventional firing for MnZn-ferrites. For otherwise identical conditions, microwave firing results to higher densities and coarser microstructures. Initial magnetic permeability values (25 kHz, 25 °C,

Microwave firing of MnZn-ferrites

The influence of the firing conditions on the nanoscale structure of the grain boundaries and on the magnetic properties of polycrystalline MnZn-ferrites is investigated, on specimens of nearly identical microstructures. High oxygen partial pressures favor accumulation of impurity ions at the triple points. Under appropriate oxygen pressures homogeneous accumulation of impurities along the grain boundaries may occur, revealing therefore chemically pure grains and low hysteresis losses; simultaneously an increase of the grain boundary resistivity occurs that results to low eddy current losses. Managing the raw material impurity cations towards controlled grain boundary structures leads to the synthesis of MnZn-ferrites with power losses similar to those achieved when high purity raw materials are used together with externally introduced additives.

/pdf/relation-between-firing-conditions-grain-boundary-structure-2ov6if9elk.pdf

E. Papazoglou

Papers

The effect of Nb2O5 dopant on the structural and magnetic properties of MnZn-ferrites

Development of a New MnZn-Ferrite Soft Magnetic Material for High Temperature Power Applications

Microwave firing of MnZn-ferrites

Relation Between Firing Conditions Grain Boundary Structure and Magnetic Properties in Polycrystalline MnZn-Ferrites

3D finite element modeling of selective laser melting for conduction, transition and keyhole modes