English  |  正體中文  |  简体中文  |  Items with full text/Total items : 28588/40619
Visitors : 4195670      Online Users : 54
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search
LoginUploadHelpAboutAdminister

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/26508

Title: Si–Ca species modification and microwave sintering for NiZn ferrites
Authors: Yin-Ju Yang;Ching-Iuan Sheu;Syh-Yuh Cheng;Horng-Yi Chang
Contributors: 國立臺灣海洋大學:輪機工程學系
Keywords: NiZn ferrite;Microueave scintering;Grain size
Date: 2004-12
Issue Date: 2011-10-20T08:36:22Z
Publisher: Journal of Magnetism and Magnetic Materials
Abstract: abstract:NiZn ferrite particles were precoated with Si–Ca precursor by sol–gel method. Thus convention-sintered particles exhibited small grain size about 2 μm and lowered magnetic permeability as well as increased coercive magnetic field effectively. Microwave sintering could suppress grain growth as the same result of conventional sintering specimens with SiO2–CaO precoating. In microwave process, the grain growth inhibition expressed more obviously for the SiO2–CaO precoated specimens. The magnetic permeability (∼300) after SiO2–CaO precoating became lower than original ferrite (∼800) without SiO2–CaO precoating in conventional sintering. However, the magnetic permeability was lowered no matter whether SiO2–CaO precoating in microwave process. On the other hand, microwave sintering possessed short processing time, for example, 1250 °C/5 min, to prohibit ZnO volatilization in accompanied with grain size reduction. Therefore, such contribution increased resistivity to about 12×106 Ω cm compared to 3×106 Ω cm of original NiZn ferrite. The large coercive magnetic field (Hc) was ascribed to the superposition of small grain size and stress induced by microwave sintering.
Relation: 284, pp.220–226
URI: http://ntour.ntou.edu.tw/handle/987654321/26508
Appears in Collections:[輪機工程學系] 期刊論文

Files in This Item:

File Description SizeFormat
index.html0KbHTML197View/Open


All items in NTOUR are protected by copyright, with all rights reserved.

 


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback