Synthesis of dense NiZn ferrites by spark plasma sintering

被引：31

作者：

Sun, JJ ^{[1
]}

Li, JB ^{[1
]}

Sun, GL ^{[1
]}

Qu, WG ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2002年 / 28卷 / 08期

关键词：

sintering (spark plasma sintering; SPS); ferrites;

D O I：

10.1016/S0272-8842(02)00064-0

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Dense NiZn ferrites were fabricated by spark plasma sintering (SPS) at 900 degreesC and 20 MPa in short periods. The powder was densified to greater than or equal to98% of the theoretical density by the SPS process. The SPS disks exhibited a higher saturation magnetization (Ms), up to 272 emu/cm(3), than did the disks sintered by the conventional process. A higher coercivity (Hci) was obtained when the green bodies were sintered by the SPS process for 5 min. A modest holding time is essential to obtain fine grain and uniformity in the SPS process. Secondary crystallization, inhomogeneous microstructure and intragranular pores were found as a result of the rapid sintering and relatively longer holding time in the SPS process. Infrared (IR) spectra were also measured in the range from 350 to 700 cm(-1) to study the efforts of the SPS process on NiZn ferrites. (C) 2002 Elsevier Science Ltd and Techna S.r.l. All rights reserved.

引用

页码：855 / 858

页数：4

共 20 条

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