Detailed Information

Cited 10 time in webofscience Cited 10 time in scopus
Metadata Downloads

Microstructure and Magnetic Properties of La-Ca-Co Substituted M-Type Sr-Hexaferrites with Controlled Si Diffusionopen access

Authors
Moon, Kyoung-SeokYu, Pyeong-yeolKang, Young-Min
Issue Date
Nov-2020
Publisher
MDPI
Keywords
M-type hexaferrite; magnetic properties; microstructure; abnormal grain growth
Citation
APPLIED SCIENCES-BASEL, v.10, no.21, pp 1 - 11
Pages
11
Indexed
SCIE
SCOPUS
Journal Title
APPLIED SCIENCES-BASEL
Volume
10
Number
21
Start Page
1
End Page
11
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/5984
DOI
10.3390/app10217570
ISSN
2076-3417
2076-3417
Abstract
La-Ca-Co substituted M-type Sr-hexaferrites (Sr0.3Ca0.4La0.3Fe9.8Co0.2O19-delta) were prepared by a solid-state reaction using two different procedures, where the SiO2 additive was mixed either before calcination (pre-Si) or after calcination (post-Si). At the same sintering temperature, smaller cell volumes and reduced saturation magnetization (M-s) values were obtained for samples processed with the pre-Si method than those with the post-Si method. This implied that the pre-Si method resulted in a greater degree of Si substitution into the M-type lattice and increased Fe extrusion out of the lattice. The grain growth behavior was controlled by the SiO2 amount and sintering temperature. It was found that abnormal grains occur with a bimodal distribution in the 0.5 wt% SiO2 samples sintered at 1240 degrees C, due to the increased critical driving force for growth caused by an increased amount of SiO2 addition. The M-s and coercivity values were altered with the control of Si diffusion and abnormal grain growth. The control of the additive diffusion behavior is one of the important keys in the material design under same materials compositions.
Files in This Item
There are no files associated with this item.
Appears in
Collections
공학계열 > Dept.of Materials Engineering and Convergence Technology > Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Moon, Kyoung Seok photo

Moon, Kyoung Seok
대학원 (나노신소재융합공학과)
Read more

Altmetrics

Total Views & Downloads

BROWSE