Development of Low-Loss Nizn-Based Ferrite Materials for High-Frequency Applications

Yahya, Noorhana (1998) Development of Low-Loss Nizn-Based Ferrite Materials for High-Frequency Applications. Masters thesis, Universiti Pertanian Malaysia.

[img] PDF
1472Kb

Abstract

This work is an initial response to the demand for miniaturisation of electronic circuits and the shift to higher operating frequencies which has led to the development of high-density low-loss ferrites. In order to meet this demand, a number of necessities, such as fine-grained and homogeneous microstructure, low power loss, weak temperature dependencies of losses and of course reasonable cost of production are required. The first part of the work was to develop the required material by manipulation of composition. NiZn-based ferrites with various additives such as MgO, CuO, TiCh, CoO and CaO were chosen and the low loss property was attained. Subsequently, a systematic crucial approach was started to further minimise the losses and to extend the operating frequency range. Green compacts with a particle size average (PSA) of 1.2um, a sintering temperature of about 1140°C and only air atmosphere were needed to reach the research targets. In conclusion, a composition-microstructure design technique has been successfully developed, which is capable of producing ferrite materials with the desired magnetic properties.

Item Type:Thesis (Masters)
Subject:Ferrites (Magnetic materials) - Thermal properties
Subject:Induction heating
Chairman Supervisor:Dr. Mansor Hashim
Call Number:FSAS 1998 39
Faculty or Institute:Faculty of Environmental Studies
ID Code:9452
Deposited By: Laila Azwa Ramli
Deposited On:08 Feb 2011 02:02
Last Modified:11 May 2012 01:08

Repository Staff Only: Edit item detail

Document Download Statistics

This item has been downloaded for since 08 Feb 2011 02:02.

View statistics for "Development of Low-Loss Nizn-Based Ferrite Materials for High-Frequency Applications"


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.