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Title: Densification Behavior of Y 3 Fe 5 O 12 Materials Prepared by Microwave Sintering Process
Authors: C.H. Lin;H.Y. Chang;I.N. Lin
Contributors: 國立臺灣海洋大學:輪機工程學系
Date: 1997-09
Issue Date: 2017-01-18T08:12:54Z
Publisher: IEEE Transactions on Magnetics
Abstract: Abstract:The microwave sintering (ms) process is observed to be superior to a conventional sintering (CS) process in the densification of Y3FesOlz materials. A density of 97.3% theoretical density (T.D.) with pure garnet phase and small grain size (5-7pm) was obtained for materials microwave sintered at 1300°C for 20 minutes. By contrast, only 94.3%' of T.D. can be reached for materials sintered by conventional processing at 1425°C for 8h and the grains are large (-25~). A higher densification rate in microwave sintering process, as compared to that in conventional sintering processing, is ascribed to the lower activation energy of densification (i.e., @a),~=83.3 kcal/mol and (E$,~163.2 kcal/mol). On the other hand, small grain size in microwave sintered samples is attributed to the fact that the (Ea),s-value is smaller than the activation energy of grain boundary migration (i.e., Ep94.8 kcal/mol).
Relation: 33(5), pp.3415-3417
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/40418
Appears in Collections:[輪機工程學系] 期刊論文

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