In this work, an attempt is made on optimization process parameters of the plasma arc discharge technique, including electrical current, atmosphere, and chamber pressure to synthesize nanocrystalline (Fe, Ni)Fe₂O₄ ferrite powders. The process was performed at the air and oxygen atmosphere with the applied arc current varying from 300 to 500 A and the chamber pressure of 1 and 2 atm. After establishing an arc between the electrodes, the as-synthesized powders were collected, and structure, magnetic, electromagnetic, and dielectric properties were examined in detail. The results show the highest value of the magnetic spinel phase (38.32 wt%) and saturation magnetization (35.1 emu/g) is obtained at the air atmosphere using an applied electrical current and chamber pressure of 400 A and 1 atm, respectively. The powders prepared in these processing conditions also exhibit the highest dielectric constant value over all the frequency ranges. Nevertheless, the powder synthesized at oxygen atmosphere in the applied electrical current of 400 A and chamber pressure of 1 atm shows the highest value of magnetic permeability over a wide range of frequency which is almost two times higher than that of the powders synthesized at the air atmosphere.

在这项工作中，尝试优化等离子弧放电技术的工艺参数，包括电流、气氛和腔室压力，以合成纳米晶 (Fe, Ni)Fe ₂ O ₄铁氧体粉末。该工艺在空气和氧气气氛下进行，施加的电弧电流从 300 到 500 A，腔室压力为 1 和 2 个大气压。在电极之间建立电弧后，收集合成的粉末，并详细检查结构、磁、电磁和介电特性。结果显示磁性尖晶石相的最高值 (38.32 wt%) 和饱和磁化强度 (35.1 emu/g) 分别在空气气氛下使用施加的电流和 400 A 和 1 atm 的腔室压力获得。在这些加工条件下制备的粉末在所有频率范围内也表现出最高的介电常数值。尽管如此，