Preparation and Characterization of Cobalt Doped Mn-Zn Ferrites
Co(1−x)MnyZnyFe2O4 (x = 0.9,0.5, 0.1 and y = 0.45, 0.25, 0.05.) nanoparticles of average crystalline size of 61 nm were prepared by chemical co-precipitation method. XRD, FTIR, SEM were utilized in order to study the effect of variation in the cobalt subs
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Abstract Co(1−x)MnyZnyFe2O4 (x = 0.9,0.5, 0.1 and y = 0.45, 0.25, 0.05.) nanoparticles of average crystalline size of 61 nm were prepared by chemical co-precipitation method. XRD, FTIR, SEM were utilized in order to study the effect of variation in the cobalt substitution and its impact on size and associated water content. The average crystalline size (DaveXR) of the particles was found to be decreased from 85 to 41 nm with the increase in cobalt concentration. Fourier transform infrared spectroscopy (FTIR) spectra of the Co(1−x)MnyZnyFe2O4 in the range 400–4000 cm−1 were reported. The spinel structure and the crystalline water adsorption of cobalt doped Mn-Zn nanoparticles were studied by using FTIR. Keywords Ferrites • Spinel • Co-precipitation • Crystalline size
1 Introduction Magnetic nanoparticles are of great technological importance because of their use in magnetic fluid, information storage system, medical diagnostics, and so on. Various preparation techniques have been used for the synthesis of fine particles of ferrites, which exhibit novel properties when compared to their properties in the bulk. Non-conventional methods such as co-precipitation, thermal decomposition, sol-gel and hydrothermal methods have been widely used. Ultra
M. Bhuvaneswari (*) Department of Physics, Mount Zion College of Engineering and Technology, Pudukkottai, India e-mail: [email protected] S. Sendhilnathan Department of Physics, Anna University of Technology,Tiruchirappalli, Pattukkottai Campus, Rajamadam, Pattukkottai, India e-mail: [email protected]
S. Sathiyamoorthy et al. (eds.), Emerging Trends in Science, Engineering and Technology, Lecture Notes in Mechanical Engineering, DOI: 10.1007/978-81-322-1007-8_55, © Springer India 2012
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M. Bhuvaneswari and S. Sendhilnathan
fine ferrite particles can be prepared by chemical co-precipitation method. Auzans et al. [1, 2] have studied the preparation and properties of Mn-Zn ferrite nano particles, which were, used in ionic and surfacted ferrofluids with different degrees of Zn substitution prepared by co-precipitation method. Chandana Rath et al. [3] have reported the dependence on cation distribution of crystallite size, lattice parameter and magnetic properties in nano size Mn-Zn ferrite for different degrees of inversion of Zn substitution prepared by hydrothermal precipitation method. The use of Mn-Zn ferrite for the preparation of temperature sensitive magnetic fluid by co-precipitation method has already been studied [4–6]. Co0.2Zn0.8Fe2O4 fine particles have been prepared by chemical co-precipitation method followed by sintering [7]. Control of crystalline size in the nanometer range by the variation of synthesis condition is always a difficult task. It becomes mandatory in the case of ferrofluid preparation using co-precipitation method. In order to prepare ferrofluid having such fine particles, specific size restriction is imposed considering the stability criteria. Co(1−x)MnyZnyFe2O4 (x = 0.9,0.5,0.1 and y = 0.45, 0.25, 0.05.) substituted
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