Novel method for low temperature sintering of barium hexaferrite with magnetic easy-axis alignment
- Authors
- An, Guk-Hwan; Hwang, Tae-Yeon; Kim, Jongryoul; Kim, JinBae; Kang, Namseok; Jeon, Kwang-Won; Kang, Min; Choa, Yong-Ho
- Issue Date
- May-2014
- Publisher
- Elsevier BV
- Keywords
- Hexaferrite; Low sintering temperature; Easy-axis magnetic alignment; Salt assisted ultrasonic spray pyrolysis; Spark plasma sintering
- Citation
- Journal of the European Ceramic Society, v.34, no.5, pp.1227 - 1233
- Indexed
- SCIE
SCOPUS
- Journal Title
- Journal of the European Ceramic Society
- Volume
- 34
- Number
- 5
- Start Page
- 1227
- End Page
- 1233
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/181971
- DOI
- 10.1016/j.jeurceramsoc.2013.10.027
- ISSN
- 0955-2219
- Abstract
- Most applications of hexaferrites require sintered products, but sintering of hexaferrites at high temperatures degrades their magnetic properties and cannot be used as low-temperature co-fired ceramics. Additionally, due to the magnetic uniaxial anisotropy of hexaferrites, excellent magnetic properties are attained when the particles are aligned along the magnetic easy-axis. In order to overcome these problems, herein we suggest a new method to decrease the sintering temperature and improve the simultaneous alignment of magnetic particles along the easy-axis. NaCl-barium hexaferrite particles and NaCl-amorphous particles were sintered using the spark plasma sintering process. Using this method, a sintered body with a relative density of 92.5% and 70.2% alignment was fabricated at 800 degrees C for 5 min. In this method, the added NaCl played a significant role in facilitating the low temperature sintering and particle alignment. This method was found to be effective for low temperature sintering and nano-scale particle alignment. (C) 2013 Elsevier Ltd. All rights reserved.
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