TY - JOUR
T1 - Effect of composition on initial permeability of Ni1-xZnxFe2O4 prepared by flash combustion technique
AU - Mangalaraja, R. V.
AU - Lee, S. Thomas
AU - Ananthakumar, S.
AU - Manohar, P.
AU - Camurri, Carlos P.
PY - 2008/3/15
Y1 - 2008/3/15
N2 - The effect of composition on initial permeability (μi) and relative loss factor (tan δ/μi) as the function of frequency and temperature is studied for Ni1-xZnxFe2O4 (x = 0.2, 0.3, 0.4 and 0.5) prepared by flash combustion technique. The ferrite powder prepared by this technique was calcined at 900 °C. The uni-axially pressed samples were sintered at temperatures of 1150, 1250 and 1350 °C. The experimental results indicate that the initial permeability of Ni-Zn ferrites increases with increasing zinc content when measured as the function of frequency at constant room temperature. The dependence of initial permeability with respect to temperature shows the decrease in the Curie point with increase in zinc content, is the normal behaviour of ferrites. The low value of relative loss factor of the order of 10-2 to 10-4 in the frequency range from 10 kHz to 13 MHz indicates that the ferrites are relatively high purity. The microstructural features were also studied and reported. The Zn ion concentration greatly influences the initial permeability as well as relative loss factor.
AB - The effect of composition on initial permeability (μi) and relative loss factor (tan δ/μi) as the function of frequency and temperature is studied for Ni1-xZnxFe2O4 (x = 0.2, 0.3, 0.4 and 0.5) prepared by flash combustion technique. The ferrite powder prepared by this technique was calcined at 900 °C. The uni-axially pressed samples were sintered at temperatures of 1150, 1250 and 1350 °C. The experimental results indicate that the initial permeability of Ni-Zn ferrites increases with increasing zinc content when measured as the function of frequency at constant room temperature. The dependence of initial permeability with respect to temperature shows the decrease in the Curie point with increase in zinc content, is the normal behaviour of ferrites. The low value of relative loss factor of the order of 10-2 to 10-4 in the frequency range from 10 kHz to 13 MHz indicates that the ferrites are relatively high purity. The microstructural features were also studied and reported. The Zn ion concentration greatly influences the initial permeability as well as relative loss factor.
KW - Effect of composition
KW - Flash combustion synthesis
KW - Initial permeability
KW - Microstructure
KW - Ni-Zn ferrites
KW - Relative loss factor
UR - http://www.scopus.com/inward/record.url?scp=38749150638&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2007.05.078
DO - 10.1016/j.msea.2007.05.078
M3 - Article
AN - SCOPUS:38749150638
VL - 476
SP - 234
EP - 239
JO - Materials Science and Engineering A
JF - Materials Science and Engineering A
SN - 0921-5093
IS - 1-2
ER -