The purpose of this work is the synthesis of Fe3BO6 nanoparticles for use as the main component in the chemical method for obtaining nanostructured Nd-Fe-B alloys. Amorphous Fe3BO6 nanoparticles prepared by chemical precipitation, FeCl3, and NaBH4 precipitant were used as precursors. Thermal treatment yielded Fe3BO6 crystalline nanoparticles. To determine the thermal effects and phase transitions were carried out: thermogravimetric analysis, differential scanning calorimetry (TG-DSC) and X-ray phase analysis (XRF). The morphology of the obtained nanoparticles was studied using scanning and transmission electron microscopy (SEM and TEM). It has been established that at a temperature of 530 °C, the complete formation of Fe3BO6∙3α-Fe2O3 occurs. The shape of the resulting Fe3BO6∙3α-Fe2O3 particles is incorrect, the average diameter of the nanoparticles was 50±10 nm.

The aim of this work is to synthesize Nd2O3 nanotubes via chemical deposition followed by thermal treatment. Nd(OH)3 nanotubes were synthesized using Nd(NO3)3 as a precursor and NaOH as a precipitant. After thermal treatment, crystalline Nd2O3 nanotubes were obtained. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) were conducted to study the thermal effects and phase transitions during the synthesis. X-ray phase analysis (XRD) was used to determine the phase composition and crystal structure. In addition, the construction of the crystal lattice structure is carried out using programs.The morphological characteristics of the obtained nanotubes were studied using transmission electron microscopy (TEM). It was found that after thermal treatment at 790 °C, the complete formation of Nd2O3 occurred, with an average diameter of 28±6 nm and a length of approximately 118±10 nm. The results show that thermal treatment led to the transformation of Nd(OH)3 into Nd2O3 nanotubes. These Nd₂O₃ nanotubes, with their unique morphology and size, are of significant interest for use in magnetic materials, catalysis, and optoelectronics, offering potential applications in the development of high-performance permanent magnets and other advanced materials.