Microstructure and properties of the Ba0.75-xCaxLa0.25Fe11.6Co0.25Ti0.15O19 hexaferrites

作者：Meng, Xiangyu; Liu, Xiansong^*; Liu, Chaocheng; Zhang, Cong; Li, Haohao; Rehman, Khalid Mehmood Ur

来源：Journal of Materials Science: Materials in Electronics , 2018, 29(2): 881-886.

DOI：10.1007/s10854-017-7984-1

• MAGNETIC-PROPERTIES
• HEXAGONAL FERRITES
• MICROWAVE PROPERTIES
• BARIUM HEXAFERRITES
• TEMPERATURE
• ZN
• NI
• CO

In the case of Ti4+ remain unchanged, the Ca2+ substituted Ba0.75-xCaxLa0.25Fe11.6Co0.25Ti0.15O19 (0 <= x <= 0.05) were prepared by conventional solid-state reaction method at temperature of 1280 degrees C. A ball-to-power weight ratio of 10:1. Their crystal structure and magnetic properties were mainly investigated. The results show that the single magnetoplumbite phase structure transformed into the multiphase structure. Meanwhile, the small amount of alpha-Fe2O3 phase existed in M-type phase. The micrographs were observed by a field emission scanning electron microscopy (SEM). Vibrating sample magnetometer (VSM) was used to analyze the magnetic properties. The saturation magnetization (M-s ) first increases then decreases when x from 0 to 0.03. But, when x from 0.03 to 0.05, the saturation magnetization (M-s ) first increases then decreases too. The maximum value is at x = 0.04 (M-s = 70.73 emu/g). The value of coercivity (H-c ) first increases then decreases when x from 0 to 0.04. But, the value increased when x from 0.04 to 0.05. The maximum value is at x = 0.02 (H-c = 1691 Oe).

• 出版日期2018-1
• 单位安徽大学