A novel conductive nano material, nano spinel ferrites having the composition of calcium chromium magnesium nanoferrites (Ca_xCr_0.5−xMg_0.5Fe₂O₄), was fabricated via sol-gel auto combustion process. The main objective was to fabricate highly stable nanocomposite as conductive material. Reaction among highly pure grade magnesium nitrate Mg (NO₃)₂·6H₂O, calcium nitrate Ca (NO₃)₂·4H₂O, and chromium nitrate Cr (NO₃)₃·9H₂O, ferric nitrate Fe (NO₃)₃·9H₂O took place to fabricate the desired material and, later on, an inductance (L)—capacitance (C)—resistance (R) meter (LCR meter) was used to determine the conductive behavior of the material. During characterization, thermogravimetric study confirmed that the stable phase was obtained above 950 °C. Fabricated ferrite FTIR spectrum was observed between 400 cm⁻¹ and 4,500 cm⁻¹. The entire sample’s structural investigation was carried out employing X-ray diffraction. Morphological analysis confirmed that particles possess angular structures having acute angles adjoining surfaces. During conductivity test, all fabricated nanoferrites presented that with the increase of frequency by LCR meter, AC conductivity had been increased. The outcome of doping of calcium on chromium magnesium nanoferrites on structural in addition to dielectric properties was synergistic.

通过溶胶-凝胶自动燃烧工艺制备了一种新型导电纳米材料，纳米尖晶石铁氧体，其组成为钙铬镁纳米铁氧体（Ca _x Cr _{0.5- x} Mg _0.5 Fe ₂ O ₄）。主要目标是制造高度稳定的纳米复合材料作为导电材料。高纯硝酸镁Mg(NO ₃ ) ₂ ·6H ₂ O、硝酸钙Ca(NO ₃ ) ₂ ·4H ₂ O、硝酸铬Cr(NO ₃ ) ₃ ·9H ₂ O、硝酸铁Fe(NO ₃ )₃ ·9H ₂ O 用于制造所需的材料，然后使用电感（L）-电容（C）-电阻（R）计（LCR 计）来确定材料的导电行为。在表征过程中，热重研究证实在 950 °C 以上获得稳定相。在 400 cm ^-1和 4,500 cm ^-1之间观察到制造的铁氧体 FTIR 光谱. 整个样品的结构研究采用 X 射线衍射进行。形态学分析证实，颗粒具有棱角结构，其邻接表面具有锐角。在电导率测试中，所有制备的纳米铁氧体都表现出随着LCR表频率的增加，交流电导率有所增加。在铬镁纳米铁氧体上掺杂钙对结构和介电性能的影响是协同的。