Zinc oxide nanoparticles have been synthesized by chemical reaction method.  Polyvinyl alcohol (PVA) composite film filled with nanometric, monodispersed zinc oxide nano particles prepared by PVA solution and nanozinc oxide. Polymer blend with ZnO nanoparticle composite film has prepared by casting technique.  The property of nano composites depends greatly on the chemistry of polymer matrices....

Zinc oxide nanoparticles have been synthesized by chemical reaction method.  Polyvinyl alcohol (PVA) composite film filled with nanometric, monodispersed zinc oxide nano particles prepared by PVA solution and nanozinc oxide. Polymer blend with ZnO nanoparticle composite film has prepared by casting technique.  The property of nano composites depends greatly on the chemistry of polymer matrices....

Introduction: Patch antennas on ferrites substrates showed tunable radiation frequency, polarisation diversity, and beam steering [1]. In addition, it was recently demonstrated that patch antennas on a selfbiased ferrite-dielectric composite substrate showed a miniaturisation factor of > 5, a 600% enhanced bandwidth and a high efficiency at a resonance frequency of 277 MHz [2]. The introduction...

The influence of B203 on the microshucture and magnetic properties of pure Mn-Zn ferrites has been investigated. A citrate gel processing route was employed to produce highly homogeneous Mn-Zn (MQ,~,Z~.,F~,,OJ ferrites undoped or doped with B203 (0-2.5wt%). The results show that B203 doping does not benefit the magnetic properties of these femtes, but promoted grain growth significantly. The in...

The impact of cation distribution on electronic structure and magnetic properties is investigated by the first-principle calculation. The structure optimization is based on generalized gradient approximation GGA exchange-correlation and projector augmented wave method. The optimized structures of inverse and normal copper ferrite are tetragonal c /a=1.06 and cubic, respectively. The optimized s...

A series of Zn1-xCoxNdyFe2-yO4 spinel ferrites (x=0,0-0.5, y=0.00-0.10) was synthesized using the co-precipitation method sintered at 1000 o C. Synthesized Ferrites were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometery (VSM). The diffraction patterns show the formation of the spinel phase along with some traces of second phase Nd2O3...

The objective of this program is to develop the knowledge and technology necessary to take full advantage of the unidirectional attenuative properties of ferrites in achieving improved gain and bandwidth in crossed-field microwave amplifiers and oscillators. During this fourth quarterly period, activities included further cold testing of ferrite materials in the L-band cold test vehicle and in ...