Molten Salt Synthesis of Ni0.5Zn0.5Fe2O4 Ferrites

Abstract:

Article Preview

In this paper, Ni0.5Zn0.5Fe2O4ferrite ceramics were produced with Ni0.5Zn0.5Fe2O4powders prepared by reaction in a molten salt using Fe2O3, NiO and ZnO powders as raw materials. Ni-Zn powders were characterized by X-ray diffraction (XRD). Density and shrinkage in diameter of Ni0.5Zn0.5Fe2O4ceramics were measured. MicroSubscript text structures were observed using field emission scanning electron microscopy (FESEM), and magnetic properties were examined by HP4291B impedance analyzer. XRD pattern indicated that the powders synthesized at 900°C for 1h were pure spinel Ni0.5Zn0.5Fe2O4phase. Via the measurement of density and shrink in diameter, optimal temperature was 1200°C and holding time was 2h, which was in accord with the results concluded from micrographs. FESEM images illustrated that the average grain size increased with increasing holding time, which followed the Ostwald liquid growth mechanism. At lower frequencies, the initial permeability (μi) increased from 86.65 to 183.48 with increasing holding time, while the threshold frequency decreased from 13.3MHz to 8.52MHz, which implied the initial permeability (μi) variation complied with the Snoek law to some extent.

Info:

Periodical:

Key Engineering Materials (Volumes 512-515)

Edited by:

Wei Pan and Jianghong Gong

Pages:

1420-1423

DOI:

10.4028/www.scientific.net/KEM.512-515.1420

Citation:

H. T. Jiang et al., "Molten Salt Synthesis of Ni0.5Zn0.5Fe2O4 Ferrites", Key Engineering Materials, Vols. 512-515, pp. 1420-1423, 2012

Online since:

June 2012

Export:

Price:

$38.00

[1] P. Priyadharsini, A. Pradeep, P. Sambasiva Rao, et al, Structural, spectroscopic and magnetic study of nanocrystalline Ni–Zn ferrites, Mater. Chemi. Phy. 116 (2009) 207-213.

DOI: 10.1016/j.matchemphys.2009.03.011

[2] W.X. Yan, L. Wang, Z.G. Xia, et al, Effect of PbO–SiO2 and PbO–B2O3 flux systems on the crystalline and magnetic properties of Ni0. 5Zn0. 5Fe2O4, Mater. Res. Bull. 42 (2007) 1468-1472.

DOI: 10.1016/j.materresbull.2006.11.010

[3] X. Li, Q. Li, Z.G. Xia, et al, Effects on direct synthesis of large scale mono-disperse Ni0. 5Zn0. 5Fe2O4 nanosized particles, J. Alloys and Compd. 458 (2008) 558-563.

DOI: 10.1016/j.jallcom.2007.04.214

[4] Z.H. Yang, Z.Q. Gong, H.X. Li, et al, Synthesis of Ni-Zn ferrite and its microstructure and magnetic properties, J. Cent. South Univ. Technol. 13 (2006) 618-623.

DOI: 10.1007/s11771-006-0004-x

[5] X. Li and G.S. Wang, Low-temperature synthesis and growth of superparamagnetic Zn0. 5Ni0. 5Fe2O4 nanosized particles, J. Magn. Magn. Mate. 321 (2009) 1276-1279.

[6] S. Kumar, V. Singh, S. Aggarwal, et al, Synthesis of nanocrystalline Ni0. 5Zn0. 5Fe2O4 ferrite and study of its magnetic behavior at different temperatures, Mater. Sci. Eng. B. 166 (2010) 76-82.

[7] N.H. Vasoya, L.H. Vanpariya, P.N. Sakariya, et al, Synthesis of nanostructured material by mechanical milling and study on structural property modifications in Ni0. 5Zn0. 5Fe2O4, Ceram. Int. 36 (2010) 947-954.

DOI: 10.1016/j.ceramint.2009.10.024

[8] W.X. Yan, Q. Li, H.S. Zhong, et al, Characterization and low-temperature sintering of Ni0. 5Zn0. 5Fe2O4 nano-powders prepared by refluxing method, Powder Technol. 192 (2009) 23-26.

DOI: 10.1016/j.powtec.2008.11.010

[9] A.C.F.M. Costa, A.P. Diniz, V.J. Silva, et al, Influence of calcination temperature on the morphology and magnetic properties of Ni–Zn ferrite applied as an electromagnetic energy absorber, J. Alloys and Compd. 483 (2009) 563-565.

DOI: 10.1016/j.jallcom.2008.08.108

[10] H.E. Zhang, B.F. Zhang, G.F. Wang, et al, The structure and magnetic properties of Zn1−xNixFe2O4 ferrite nanoparticles prepared by sol–gel auto-combustion, J. Magn. Magn. Mater. 312 (2007) 126-130.

DOI: 10.1016/j.jmmm.2006.09.016

[11] Q.L. Li, C.B. Chang, H.X. Jing, et al, Synthesis and characterization of shape-controlled Ni0. 5Zn0. 5Fe2O4 via the coprecipitation method, J. Alloys and Compd. 495 (2010) 63-66.

[12] S. Hallynck, G. Pourroy, S. Vilminot, et al, Synthesis of high aspect ratio of Ni0. 5Zn0. 5Fe2O4 platelets for electromagnetic devices, Solid State Sci. 8 (2006) 24-30.

DOI: 10.1016/j.solidstatesciences.2005.10.007

[13] H.T. Jiang, X.F. Wang, C.L. Yu, et al, Molten salt synthesis of Ni0. 5Zn0. 5Fe2O4 powders, Mater. Manuf. Process. 25 (2010) 1489-1493.

In order to see related information, you need to Login.