JIA Nan, FANG Bijun, DU Qingbo

(School of Materials Science and Engineering, Changzhou University, Changzhou Jiangsu 213164, China)

Abstract:Ni1 -xZnxFe2O4 precursor powders in fine particles with rather good size distribution and less conglomeration were prepared by chemical co-precipitation method. The optimized calcination temperatures of the Ni1-xZnxFe2O4 precursors were determined by TG -DSC analysis, XRD measurement, laser particle size analyzer and SEM observation. Ni1 -xZnxFe2O4 ceramics were prepared by the solid -state reaction method using the active Ni1 -xZnxFe2O4 precursor powders. All the Ni1-xZnxFe2O4 ceramics sintered at different temperatures exhibit pure spinel structure. The concentration of Zn2+ cation and sintering temperature exert great influence on crystal structure, density and physical properties of the synthesized Ni1 -xZnxFe2O4 ceramics. At the same sintering temperature, the values of density, square resistance and saturated magnetization of the Ni1-xZnxFe2O4 ceramics exhibit the tendency to increase.

Key words: Ni1-xZnxFe2O4; chemical co-precipitation; spinel structure; square resistance; magnetic property