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Wet chemical processing of MnZn-ferrites

Authors
Publisher
Technische Universiteit Eindhoven
Publication Date
Keywords
  • Dissertations The And Tu/E
  • Materials Science: Dissertations
  • Mechanical Engineering: Dissertations
  • Ferrimagnetism. Ferrites. Antiferromagnetism
  • Powder Metallurgy
  • Powder Technology
  • Ferrites

Abstract

Wet Chemical Processing of MnZn-ferrites Arjan Noordermeer Cover page: After Escher: Birth of a Ceramic Printed by Ponsen & Looijen BV, Wageningen, 1997 ISBN 90-74445-37-3 ©Philips Electronics N.V. 1997 All rights are reserved. Reproduction in whole or in part is prohibited without written consent of the copyright owner. Wet Chemical Processing of MnZn-ferrites PROEFSCHRIFT ter verkrijging van de graad van doctor aan de Technische Universiteit Eindhoven, op gezag van de Rector Magnificus, prof.dr. M. Rem, voor een commissie aangewezen door het College voor Promoties in het openbaar te verdedigen op dinsdag 28 oktober 1997 om 16.00 uur door Arjan Noordermeer geboren te Amsterdam Dit proefschrift is goedgekeurd door de promotoren: prof.dr. G. de With en prof.dr. R. Metselaar Voor rnijn vader ... en rnijn moeder, Jeanette, Tamar, Yannick en Larissa Table of Contents Chapter Page 1 2 Introduction 1.2 Powder preparation 1.2.1 Principle of formation 1.2.2 Geometry 1.2.3 Chemistry 1.2.4 Choice of powder preparation 1.3 Consolidation I 3 5 5 9 11 11 1. 3 . I Dry pressing methods II 1.3.2 Wet consolidation methods 12 1.3.3 Choice of consolidation method 15 1.4 Sintering 15 1.4.1 Sintering of ferrites 15 1.4.2 Principles of sintering and main stages of the process 20 1.4.3 Shrinkage rate 22 1.4.4 Grain growth and pore grain boundary interaction 24 1.4.5 Influence of pacldng characteristics 25 1.4.6 Choice of analysis method for sintering 25 Direct precipitation of Mn-Zn-ferrites 2.1 Introduction 2.2 Experimental 2.3 Results 2.3.1 Aerial oxidation, influence of the reaction conditions 2.3.2 Aerial oxidation, compositions other than standard 2.3.3 NO)-oxidation 2.3.4 Use of organic base 2.3.5 Impurities and purification 2.3.6 BET Specific Surface Area 2.4 Discussion 2.4.1 General aspects 2.4.2 Geometrical aspects 2.4.3 Chemical aspects 2.5 Conclusions Appendix

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