This work proposes the synthesis of calcium ferrite particles for application in electrical energy storage. The ferrites were prepared using calcium and iron nitrates as base materials, by a protein sol-gel method, using coconut water, an ”eco-friendly” and sustainable route. The powders obtained were pressed into disks and heat-treated at temperatures ranging from 400 to 1000 °C. For various heat treatment temperatures, the samples were subjected to structural, morphological, and electrical characterization. The desired crystalline phase (CaFe2O4) is present in the samples treated from 700 °C onwards. However, it is only in the samples heat-treated at 800 and 1000 °C that this crystalline phase is present without secondary phases. From the morphological analysis, CaFe2O4 grains with an average size of 0.3 µm (sample 800 °C) and 1.2 µm (sample 1000 °C) were obtained. Regarding the electrical measures, the most promising sample is the one treated at 1000 °C because it presents a dielectric constant value of 87132 and dielectric losses of 1.79, at 300 K and 100 Hz.

这项工作提出了用于电能存储的铁酸钙颗粒的合成。铁氧体是使用硝酸钙和硝酸铁作为基础材料，通过蛋白质溶胶-凝胶法，使用椰子水制备的，这是一种“环保”和可持续的路线。将获得的粉末压成圆盘并在 400 至 1000 °C 的温度下进行热处理。对于各种热处理温度，对样品进行结构、形态和电学表征。所需的结晶相 (CaFe2O4) 存在于从 700 °C 开始处理的样品中。然而，只有在 800 和 1000 °C 热处理的样品中，这种结晶相才存在，而没有第二相。从形态分析来看，CaFe2O4 晶粒平均粒径为 0.3 获得了µm（样品 800 °C）和 1.2  µm（样品 1000 °C）。 关于电气测量，最有希望的样品是在 1000 °C 下处理的样品，因为它在 300 K 和 100  Hz下的介电常数值为 87132，介电损耗为 1.79 。