The effect of calcining temperature on the magnetic properties of the ultra-fine NiCuZn-ferrites

In this study, the ultra-fine NiCuZn-ferrite was prepared by a coprecipitation method. The magnetic properties were investigated in terms of calcining temperature. The ferrite powders, Ni 0.206Cu 0.206Zn 0.618Fe 1.94O 4− δ , were initially heat treated at various temperatures of 300–750 °C, and then...

Full description

Saved in:
Bibliographic Details
Published in:Materials research bulletin 2009-03, Vol.44 (3), p.633-637
Main Authors: Kim, Jung-Sik, Ham, Chang-Woo
Format: Article
Language:English
Subjects:
COPPER COMPOUNDS
COPRECIPITATION
D. Magnetic properties, A. Magnetic materials, B. Chemical synthesis
FERRITES
GRAIN GROWTH
HEAT TREATMENTS
MAGNETIC PROPERTIES
MATERIALS SCIENCE
MICROSTRUCTURE
NICKEL COMPOUNDS
PARTICLE SIZE
PERMEABILITY
POWDERS
QUALITY FACTOR
SCANNING ELECTRON MICROSCOPY
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
ZINC COMPOUNDS
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this study, the ultra-fine NiCuZn-ferrite was prepared by a coprecipitation method. The magnetic properties were investigated in terms of calcining temperature. The ferrite powders, Ni 0.206Cu 0.206Zn 0.618Fe 1.94O 4− δ , were initially heat treated at various temperatures of 300–750 °C, and then sintered at the final temperature of 900 °C. The average particle size calculated by a XRD pattern and confirmed by a transmission electron microscope (TEM) micrograph was 7.5 nm. The calcining temperature was an important factor for microstructures and magnetic properties of the sintered ferrite. Scanning electron microscope (SEM) micrographs showed a uniform grain growth with small pores and high densification at the calcining temperature of 450 °C. From the results of magnetic property measurements, the ferrite calcined at 450 °C showed higher initial permeability (170) and quality factor (72) than those of other calcining temperatures.
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2008.06.021