Effect of Bismuth Oxide on the Structure, Electrical Resistance and Magnetization of Lithium Zinc Ferrite

S. A. Nikolaevа; Николаева С. А.; Yu. S. Elkina; Елькина Ю. С.; E. N. Lysenko; Лысенко Е. Н.; E. V. Nikolaev; Николаев Е. В.; V. A. Vlasov; Власов В. А.

doi:10.31857/S0015323024040092

Effect of Bismuth Oxide on the Structure, Electrical Resistance and Magnetization of Lithium Zinc Ferrite

Authors: Nikolaevа S.A.¹, Elkina Y.S.¹, Lysenko E.N.¹, Nikolaev E.V.¹, Vlasov V.A.¹
Affiliations:
1. National Research Tomsk Polytechnic University
Issue: Vol 125, No 4 (2024)
Pages: 447-452
Section: ЭЛЕКТРИЧЕСКИЕ И МАГНИТНЫЕ СВОЙСТВА
URL: https://innoscience.ru/0015-3230/article/view/662881
DOI: https://doi.org/10.31857/S0015323024040092
EDN: https://elibrary.ru/WQNAJL
ID: 662881

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Abstract

The structural, electrical, and magnetic properties of lithium zinc ferrite prepared by ceramic technology have been studied. The composition of lithium zinc ferrite is Li_0.4Fe_2.4Zn_0.2O₄ with 1 and 2 wt % bismuth oxide. The addition of Bi₂O₃ prior to sintering of the samples has been shown to affect the structural, electrical, and magnetic properties of the ferrite. A significant increase in density from 4.47 to 4.65 g/cm³ and a decrease in porosity from 4.8 to 2.3% have been observed when the concentration of bismuth oxide has been increased to 2 wt %. The Bi₂O₃-containing samples have higher specific electrical resistivity compared to that of the additive-free lithium zinc ferrite. The introduction of bismuth oxide has reduced the specific saturation magnetization from 70.55 to 54.76 G cm³/g. The Curie temperature has not changed significantly. An optimal combination of macroscopic properties of ferrite has been found at 1 wt % Bi₂O₃ concentration.

Keywords

lithium zinc ferrite, bismuth oxide, electrical properties, Curie temperature

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