Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jallcom.2007.05.050
Title: Development of magneto-dielectric materials based on Li-ferrite ceramics. I. Densification behavior and microstructure development
Authors: Teo, M.L.S.
Kong, L.B. 
Li, Z.W. 
Lin, G.Q. 
Gan, Y.B. 
Keywords: Densification
Grain growth
Lithium ferrite
Sintering
Solid-state reaction
XRD
Issue Date: 14-Jul-2008
Citation: Teo, M.L.S., Kong, L.B., Li, Z.W., Lin, G.Q., Gan, Y.B. (2008-07-14). Development of magneto-dielectric materials based on Li-ferrite ceramics. I. Densification behavior and microstructure development. Journal of Alloys and Compounds 459 (1-2) : 557-566. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jallcom.2007.05.050
Abstract: The densification, grain growth and microstructure development of Li-ferrite (Li0.50Fe2.50O4) ceramics, doped with Bi2O3 as sintering aid and Co as magnetic property modifier, were studied. The primary objective of the present study was to develop magneto-dielectric materials, with matching permeability and permittivity, as well as low magnetic and dielectric loss tangents, for miniaturization of HF (3-30 MHz) antennas. Due to its poor densification, fully sintering of pure Li0.50Fe2.50O4 requires high temperature (1200 °C). High temperature sintering resulted in undesirable high dielectric loss tangent, due to the formation of Fe2+ ions. To reduce the sintering temperature of Li0.50Fe2.50O4, Bi2O3 was selected as sintering aid because of its relatively low melting point (∼820 °C). The densification behavior and slow grain growth rate of Li0.50Fe2.50O4 were greatly improved by the addition of Bi2O3, because a liquid phase sintering occurred during the sintering process at high temperature due to the low melting point of Bi2O3. It is found that 1% Bi2O3 is able to promote full densification of Li0.50Fe2.50O4 at a temperature of as low as 850 °C. Comparatively, the effect of Co on the densification and grain growth behavior of Li0.50Fe2.50O4 ceramics is much less significant. © 2007 Elsevier B.V. All rights reserved.
Source Title: Journal of Alloys and Compounds
URI: http://scholarbank.nus.edu.sg/handle/10635/111363
ISSN: 09258388
DOI: 10.1016/j.jallcom.2007.05.050
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

49
checked on Aug 11, 2020

WEB OF SCIENCETM
Citations

44
checked on Jul 2, 2019

Page view(s)

87
checked on Aug 15, 2020

Google ScholarTM

Check

Altmetric


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