Abstract
Nanoparticles of Co2Z hexaferrite were synthesized by the citrate sol-gel process under an inert atmosphere, then thermally analyzed by Thermogravimetric and Differential Thermal Analysis and characterized by X-ray Diffraction, Scanning Electron Microscopy, Atomic Force Microscopy, X-ray Fluorescence and Vibration Sample Magnetometry. Z-type barium hexaferrite is a promising material for application in high frequency electronic devices involving up to 100 MHz, such as multi-layer chip inductors (MLCI), which require magnetic materials with high initial permeability, high resistivity, low magnetic and dielectric loss, and good thermal stability.
Highlights
Ultra high frequency (UHF) devices today are increasingly applied in miniaturized components, and the demand for even more diminutive products and components has led to the development of a componenttrack linking process using surface mounting devices (SMD)
This process links terminals directly to tracks based on a technique similar to binding with glue, replacing the electric links with terminals that cross the perforations of an integrated circuit board (ICB) [1]
Multi-layer chip inductors (MLCI) are the most important passive SMDs of today’s modern electronic industry [1,2,3], but the technology required for MCLIs is less advanced than that of multi-layer chip capacitors and resistors
Summary
Ultra high frequency (UHF) devices today are increasingly applied in miniaturized components, and the demand for even more diminutive products and components has led to the development of a componenttrack linking process using surface mounting devices (SMD). This process links terminals directly to tracks based on a technique similar to binding with glue, replacing the electric links with terminals that cross the perforations of an integrated circuit board (ICB) [1]. The Co2Z hexaferrite can be considered the ideal material for MLCI applications in bands ranging from 300 to 1000 MHz, displaying high permeability, dielectric constants and ferromagnetic resonance from 1 to 3 GHz [4]. The use of inert atmospheres or CO2 (g) and H2O (g) pressures of less than 10-13 allow the formation of barium hexaferrite at relatively low temperatures with a minimal formation of BaCO3
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