Effect of sintering temperature on properties of Li0.5Fe2.5O4 ferrites nanoparticles
Main Article Content
Abstract
In this work, Li0.5Fe2.5O4 ferrite nanoparticles were synthesized by the sol-gel method. The influence of the annealing temperature on phase formation, microstructure, and magnetic characterizations of Li-ferrite was explored. The result of XRD showed that the preliminary calcined and sintered samples at 500oC are single-phase spinel structures. The crystallite size increases from 16.9 nm to 37.8 nm, with sintering temperatures increasing from 500oC to 800oC. The magnetic properties of Li ferrite powders were strongly depended on sintering temperature (Ttk). Coercive force (HC) followed a simple model of Gauss's law. The magnetic saturation (MS) was dependent on the sintering temperature of the gel, reaching a maximum value of 74 emul/g, which is higher than the bulk material. Curie temperature (TC) of Li ferrite nanoparticles is a function of gel sintering temperature, and it reaches 98% of the TC value of bulk materials.
Keywords
liti ferit, sol-gel, sintering, preliminary calcine
Article Details
References
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[5] Mamata Maisnam, Nandeibam Nilima, Maisnam Victory, Sumitra Phanjoubam, Low dielectric loss in nano-Li-ferrite spinels prepared by sol–gel autocombustion technique, Bull. Mater. Sci. Vol.39, No.1, (2016) 249–254. https://www.ias.ac.in/article/fulltext/boms/039/01/0249-0254.
[6] A. M. Samy, E. Hassan Aly, Effect of annealing temperature on prepared nanoparticles Li-Ferrite using positron annihilation lifetime technique, Mater. Sci. Appl., 6, (2015) 436-444. http://dx.doi.org/10.4236/msa.2015.65047.
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[8] Sonal Singhal, Kailash Chandra, Cation distribution in lithium ferrite (LiFe5O8) prepared via aerosol route, JEMAA, 2, (2010) 51-55. https://doi.org/10.4236/jemaa.2010.21008.
[9] Mathew George, Swapna S Nair, Asha Mary John, P A Joy, M R Anantharaman, Structural, magnetic and electrical properties of the sol-gel prepared Li0.5Fe2.5O4 fine particles, Journal of Physics D: Applied Physics. 39, (2006) 900–910. https://doi.org/10.1088/0022-3727/39/5/002.
[10] N.I. Abu-Elsaad, S.A. Mazen, H.M. Salem, The effect of zinc substitution and heat treatment on microstructural and magnetic properties of Li ferrite nanoparticles, J. Alloys. Compd., 835, (2020), 155227. https://doi.org/10.1016/j.jallcom.2020.155227.
[11] Nguyễn Thị Lan, Thân Đức Hiền, Nguyễn Phúc Dương, Cấu trúc và các tính chất từ của ferit Li0,5Fe2,5O4 có kích thước nano, Kỷ yếu Hội nghị Vật lý Chất rắn toàn quốc lần thứ 5, Vũng Tàu, Việt nam, (2007) 239-242.
[12] N. T. Lan, T. Đ, Hien, N. P. Duong, Ảnh hưởng của điều kiện thí nghiệm tới tính chất hạt nano ferit Li0,5Fe2,5O4 tổng hợp bằng phương pháp sol-gel, Kỷ yếu Hội nghị về Vật liệu và Công nghệ Nano Tiên tiến – WANN2017, Hà Nội, Việt nam, (2017), 57-61.
[13] S. Dey, A. Roy, D. Das, J. Ghose, Preparation and characterization of nanocrystalline disordered lithium ferrite by citrate precursor method, JMMM, 270, (2004) 224-229. https://doi.org/10.1016/j.jmmm.2003.08.024.
[14] S. Krupička, P. Novák, .in: E.P. Wohlfarth (Ed.). Ferromagnetic Materials, vol. 3, North-Holland, Amsterdam, (1982).
[15] B.D. Cullity, Introduction to Magnetic Materials, Addinson Wesley, New York, (1972).
[16] K. Parekh, R.V. Upadhyay, L. Belova, K.V. Rao, Ternary monodispersed Mn0.5Zn0.5Fe2O4 ferrite nanoparticles: preparation and magnetic characterization, Nanotechnology, 17 (24), (2006) 5970. https://doi.org/10.1088/0957-4484/17/24/011.