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- Title
Low-temperature sintering LiZnTiMn ferrite ceramics: synthesis, microstructure, and enhanced ferromagnetic properties with CuO-V<sub>2</sub>O<sub>5</sub> additive.
- Authors
Xie, Fei; Jia, Lijun; Xu, Fang; Gan, Gongwen; Li, Jie; Li, Yilei; Li, Yuanxun; Zhang, Huaiwu
- Abstract
In this study, a new method was developed for the coexistence of different grain sizes and the densification of low-temperature sintered Li0.42Zn0.27Ti0.11Mn0.1Fe2.1O4 (LiZnTiMn) ferrite ceramics. Excellent gyromagnetic performance was realized for the LiZnTiMn ferrite ceramics by controlling the amount of CuO-V2O5 sintering additive. In particular, the appropriate amount of CuO-V2O5 sintering additive effectively restrained the abnormal grain growth and enhanced the densification of low-temperature sintering ferrite ceramics. In addition, scanning electron microscopy images indicated different grain sizes (large grains of ~ 10 µm and small grains of ~ 2 µm) because of the existence of V2O5-CuV2O6 eutectic compounds. The addition of the optimum amount of CuO-V2O5 resulted in LiZnTiMn ferrite ceramics with high saturation magnetization and low coercivity (ferromagnetic resonance line width was narrow). For the sample with 0.5 wt% CuO-V2O5 additive, a pure spinel phase was synthesized at a low firing temperature (~ 900 °C). In addition, the sample possessed significantly enhanced microwave ferromagnetic properties: Ms = 78.56 emu/g, Br/Bs = 0.85, Hc = 167 A/m, and △H = 167 Oe, making it useful as a new type of gyromagnetic material. These newly developed ceramic materials could be suitable candidates for microwave low-temperature co-fired ceramic gyromagnetic devices.
- Subjects
LOW temperatures; FERROMAGNETIC materials; MICROSTRUCTURE; SOL-gel processes; CRYSTAL structure
- Publication
Journal of Materials Science: Materials in Electronics, 2018, Vol 29, Issue 15, p13337
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-018-9458-5