Effect of copper ions on the structural and electrical properties of Ni-Zn ferrite nanoparticles

Dissertant

Baha al-Din, Ala Safa al-Din

Thesis advisor

Rida, Sabah Muhammad Ali

University

University of Technology

Faculty

-

Department

Applied Sciences Department

University Country

Iraq

Degree

Master

Degree Date

2012

English Abstract

NiCuZn ferrite nanoparticles are the most important magnetic material used in electrical technical such as generators, motors, communications, video casate recording and transformer cores.

The present work is focused to study the structural and electrical properties of NiCuZn ferrite nanoparticles by using many measurements like x-ray diffraction and dielectric constant.

Ferrite nanoparticles Ni0.5-xCuxZn0.5Fe2O4 with increased of copper equal to 0.1 have been prepared by Sol-gel auto combustion method.

The variation of copper substitution has a significant influence on the structural, electrical properties such as grain size, lattice constant, X-ray density, AC electrical conductivity, real dielectric constant, imaginary dielectric constant and tangent loss.

The chemical phase analysis carried out by x-ray diffraction (XRD) method confirms the formation of the expected ferrite structure.

The perfect spinel ferrite was formed when the additional Cu ions (x=0.3) at 800oC.Lattice parameter, x-ray density have been investigated to study the effect of composition on structural and electrical properties.

Lattice parameters show increasing trend with increasing Cu in the composition and a high value which was obtained equal to (8.3975 Å) when Cu ions addition (x=0.3) at 800oC .

However, the x-ray density of NiCuZn ferrites was decreased with increasing the Cu ion content and the particle size of ferrite powder was increased from (25.73 - 32.39 nm) with temperature degree increase from (500 -–1000o C).

The dielectric constant and the dielectric loss tangent were studied for all the ferrite system prepared at different temperatures (200,500,800 and 1000oC) and frequencies (25KHz to 3MHz).

It was found that the values of dielectric constant and tangent loss that would be increased with increasing of Cu ion amount respectively & temperatures.

A high valued which was obtained is (4.4) when the Cu ions addition (x=0.1) at 1000oC for CP10 ferrite composition.

The variation of the dielectric constant and dielectric loss tangent as a function of frequency for these series of ferrite system at different temperatures were decreased with frequency and this is a normal dielectric behavior of spinel ferrites.

Main Subjects

Engineering & Technology Sciences (Multidisciplinary)

Topics

• Physics
• Electrolysis

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-418672