Effects of Bi2O3-V2O5 mixture on microstructure and magnetic properties for Li0.42Zn0.27Ti0.11Mn0.1Fe2.1O4 ferrites sintered at low temperatures

Abstract

In this study, Bi2O3-V2O5 (BV) mixture was introduced to serve as a kind of sintering aid to assist the preparation of LiZn ferrites. The Li0.42Zn0.27Ti0.11Mn0.1Fe2.1O4 ferrites were successfully synthesized at relatively low temperatures, and all the samples exhibited a pure spinel phase. Meanwhile, the grain growth was significantly promoted, and the average grain size was elevated from 0.92 to 6.58 µm when the addition amount of BV mixture increased from 0.0 to 0.18 wt. %. In regard to the magnetic properties, the saturation induction (Bs) value could reach as high as 319 mT, and the coercivity (Hc) and ferromagnetic resonance linewidth (ΔH) decreased to 153 A/m and 182 Oe, respectively. It is worth noting that the proper addition amount is a key factor for enhancing the properties of ferrites, insufficient or excess BV mixture will deteriorate the properties. Therefore, it is expected that BV mixture can be employed as an effective sintering aid, which will improve the properties of ferrites and promote the development of low temperature co-fired ceramics (LTCC) technology.