Vol 8, No 4 (2017) > Metalurgy and Material Engineering >

Synthesis and Magnetic Characterization of Mn‐Ti Substituted SrO.6Fe2‐xMnx/2Tix/2O3 (x = 0.0–1.0) Nanoparticles by Combined Destruction Process

Karina Nur Fitriana, Mas Ayu Elita Hafizah, Azwar Manaf

 

Abstract: Single phased SrO.6Fe2-xMnx/2Tix/2O3 (x = 0.0; 0.5; and 1.0) nanoparticles, whose mean size was comparable with the crystallite size, were successfully fabricated through mechanical alloying and a subsequent ultrasonic destruction processes. The ultrasonic destruction process employed a transducer operated under amplitudes of 35, 45, and 55 μm. Results indicated that the mean particle size was not determined by the transducer amplitude, but the mechanical properties of the materials, as well as the initial size of the particles. After ultrasonic destruction, the mean sizes of the particles decreased to the range of 87–194 nm with a narrow distribution width. The mean particle sizes were about 1 to 3 times larger than the respective crystallite sizes. Such fine particles were aimed to decrease the coercivity, as was seen in the sample with x = 0, which showed a decrease in coercivity from 474 kA.m-1 to 24 kA.m-1 and 15 kA.m-1. A further reduction in the coercivity was observed in Mn-Ti substituted strontium hexaferrite.
Keywords: Mechanical alloying; Nanoparticle; Sonochemistry; Strontium hexaferrite; Ultrasonic destruction

Full PDF Download

References


Ataie, A., 2001. Synthesis of Ultra-fine Particles of Strontium Hexaferrite by a Modified Co-precipitation Method. Journal of European Ceramic Society, Volume 21, pp. 1951–1955

Baniasadi, A., Ghasemi, A., Nemati, A., Azami Ghadikolaei, M., Paimozd, E., 2014. Effect of Ti-Zn Substitution on Structural, Magnetic and Microwave Absorption Characteristics of Strontium Hexaferrite. Journal of Alloys and Compounds, Volume 583, pp. 325–328

Cullity, B.D., Graham, C.D., 2008. Introduction to Magnetic Materials. New Jersey: John Wiley & Sons, Inc.

Dunne, F.P.E., Kiwanuka, R., Wilkinson, A.J., 2012. Crystal Plasticity Analysis of Micro-deformation, Lattice Rotation and Geometrically Necessary Dislocation Density. In: Proceedings of The Royal Society A: Mathematical, Physical, and Engineering Sciences, Volume 468(2145), pp. 2509−2531

Hadjipanayis, G.C., Prinz, G., 1991. Science and Technology of Nanostructured Magnetic Materials. (Hadjipanayis, G.C.; Prinz, G., Ed.), In: Nato Science Series B: Physics (1st ed.). Springer US, USA

Jamalian, M., Ghasemi, A., Paimozd, E., 2014. Sol-Gel Synthesis of Mn-Sn-Ti-Substituted Strontium Hexaferrite Nanoparticles: Structural, Magnetic, and Reflection-loss Properties. Journal of Electronic Materials, Volume 43(4), pp. 1076–1082

Manawan, M., Manaf, A., Soegijono, B., Yudi, A., 2014. Microstructural and Magnetic Properties of Ti2+-Mn4+ Substituted Barium Hexaferrite. Advanced Materials Research, Volume 896, pp. 401–405

Merouani, S., Hamdaoui, O., Rezgui, Y., Guemini, M., 2014. Energy Analysis during Acoustic Bubble Oscillation: Relationship between Bubble Energy and Sonochemical Parameters. Ultrasonics, Volume 54(1), pp. 227–232

Mittemeijer, E.J., Welzel U., 2008. The "State of Art" of Diffraction Analysis of Crystallite Size and Lattice Strain. Zeitschrift für Krystallographie, Volume 223, pp. 552−560

Mozaffari, M., Arab, A., Yousefi, M. H., Amighian, J., 2010. Preparation and Investigation of Magnetic Properties of MnNiTi-Substituted Strontium Hexaferrite Nanoparticles. Journal of Magnetism and Magnetic Materials, Volume 322(18), pp. 2670–2674

Scardi, P., Leoni, M., 2002. Whole Powder Pattern Modelling. Acta Crystallographica Section A: Foundations of Crystallography, Volume 58(2), pp. 190–200

Shannon, R.D., 1976. Revised Effective Ionic Radii and Systematic Studies of Interatomic Distances in Halides and Chalcogenides. Acta Crystallographica, Volume A32, pp. 751-767

Tabatabaie, F., Fathi, M.H., Saatchi, A., Ghasemi, A., 2009. Microwave Absorption Properties of Mn- and Ti-doped Strontium Hexaferrite. Journal of Alloys and Compounds, Volume 470(1–2), pp. 332–335