This work has the main purpose comparing the structural and dielectric properties of lithium ferrite nanoparticles obtained by sol-gel (SG) and solid state reaction (SSR) methods, using the same raw materials, metal nitrates, which are not common, in order to make a reliable comparison. Samples prepared by the SG method, the crystalline phase of lithium ferrite is obtained for lower heat treatment temperatures than for the SSR method. The more suitable samples to be applied to electronic devices to store energy are the one treated at 800 °C, for SG method and the other treated at 1100 °C, for SSR. Lithium ferrite is one of the most known cubic ferrites with very interesting properties with several technological applications. Samples structure was studied by XRD and their morphology by SEM. The dielectric properties were analysed, in the frequency range between 100 Hz and 1 MHz and temperature 200–370 K.

这项工作的主要目的是比较使用溶胶-凝胶（SG）和固态反应（SSR）方法获得的锂铁氧体锂纳米颗粒的结构和介电性能，使用相同的原料（不常见的金属硝酸盐）来进行可靠的比较。通过SG方法制备的样品，可以获得比SSR方法更低的热处理温度，从而获得铁酸锂的结晶相。适用于电子设备存储能量的更合适的样品是一种在SG方法中于800°C处理的样品，而对于SSR在1100°C中处理的另一样品。铁酸锂是最著名的立方铁氧体之一，具有许多技术应用中非常有趣的特性。通过XRD研究样品的结构，并通过SEM研究其形态。介电性能进行了分析，