TY - JOUR
T1 - The effect of calcining temperature on the magnetic properties of the ultra-fine NiCuZn-ferrites
AU - Kim, Jung Sik
AU - Ham, Chang Woo
PY - 2009/3/5
Y1 - 2009/3/5
N2 - 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, Ni0.206Cu0.206Zn0.618Fe1.94O4-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.
AB - 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, Ni0.206Cu0.206Zn0.618Fe1.94O4-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.
KW - D. Magnetic properties, A. Magnetic materials, B. Chemical synthesis
UR - http://www.scopus.com/inward/record.url?scp=58849134180&partnerID=8YFLogxK
U2 - 10.1016/j.materresbull.2008.06.021
DO - 10.1016/j.materresbull.2008.06.021
M3 - Article
AN - SCOPUS:58849134180
SN - 0025-5408
VL - 44
SP - 633
EP - 637
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 3
ER -