Development of Low-Loss Nizn-Based Ferrite Materials for High-Frequency Applications
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 m...
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| Format: | Thesis |
| Language: | English English |
| Published: |
1998
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| Online Access: | http://psasir.upm.edu.my/id/eprint/9452/1/FSAS_1998_39_A.pdf |
| _version_ | 1825944588974555136 |
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| author | Yahya, Noorhana |
| author_facet | Yahya, Noorhana |
| author_sort | Yahya, Noorhana |
| collection | UPM |
| description | 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. |
| first_indexed | 2024-03-06T07:18:14Z |
| format | Thesis |
| id | upm.eprints-9452 |
| institution | Universiti Putra Malaysia |
| language | English English |
| last_indexed | 2024-03-06T07:18:14Z |
| publishDate | 1998 |
| record_format | dspace |
| spelling | upm.eprints-94522024-03-05T07:07:38Z http://psasir.upm.edu.my/id/eprint/9452/ Development of Low-Loss Nizn-Based Ferrite Materials for High-Frequency Applications Yahya, Noorhana 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. 1998-02 Thesis NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/9452/1/FSAS_1998_39_A.pdf Yahya, Noorhana (1998) Development of Low-Loss Nizn-Based Ferrite Materials for High-Frequency Applications. Masters thesis, Universiti Putra Malaysia. Ferrites (Magnetic materials) - Thermal properties Induction heating English |
| spellingShingle | Ferrites (Magnetic materials) - Thermal properties Induction heating Yahya, Noorhana Development of Low-Loss Nizn-Based Ferrite Materials for High-Frequency Applications |
| title | Development of Low-Loss Nizn-Based Ferrite Materials for High-Frequency Applications |
| title_full | Development of Low-Loss Nizn-Based Ferrite Materials for High-Frequency Applications |
| title_fullStr | Development of Low-Loss Nizn-Based Ferrite Materials for High-Frequency Applications |
| title_full_unstemmed | Development of Low-Loss Nizn-Based Ferrite Materials for High-Frequency Applications |
| title_short | Development of Low-Loss Nizn-Based Ferrite Materials for High-Frequency Applications |
| title_sort | development of low loss nizn based ferrite materials for high frequency applications |
| topic | Ferrites (Magnetic materials) - Thermal properties Induction heating |
| url | http://psasir.upm.edu.my/id/eprint/9452/1/FSAS_1998_39_A.pdf |
| work_keys_str_mv | AT yahyanoorhana developmentoflowlossniznbasedferritematerialsforhighfrequencyapplications |