Structural, Mechanical, Electrical and Magnetic Properties of Mn–Zn Substituted Ca-hexaferrites

C. L. Khobaragade; N. A. Wagdhare; C. B. Khobragade; A. K. Akant; R. K. Khatarkar; S. V. Soni; K. G. Rewatkar

Abstract

In the present investigation, the samples with chemical composition Ca(CoTi)0.5(MnZn)x/2Fe11–xO19 with (x = 0 to 1.0) have been synthesized using perfect stoichiometric proportions of reacting oxides by standard ceramic technique. The pellets of 15 mm diameter were prepared and sintered at 1313 K in air atmosphere for 106 h and characterized by using XRD and SEM. XRD studies of the samples showed hexagonal magnetoplumbite (M) structure with unit cell dimensions “a’ and “c” varies from 5 to 6 Å and 21 to 23 Å pertaining to space group P63/mmc (No. 194). The mass density of the ferrites were found to vary linearly and depend upon the sample’s mass and volume. The X-ray density depends on lattice constant and molecular weight of the sample. The computation of porosity has been done by considering bulk and X-ray density of the studied samples. The variation in the values of lattice parameter has to be recorded with increase in Mn–Zn concentration. The elastic properties of Mn–Zn doped Ca-hexaferrite have been studied using ultrasonic pulse transmission technique at 100 kHz at 300 K. The field-dependent electric and magnetic properties of prepared Ca-hexaferrite powder were investigated at different temperatures.

Abstract

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