Study of the phenomenon of magnetism in iron-containing silicates glasses

Studying the structure and properties of iron-containing glass-crystalline materials is an urgent task, as it makes it possible to develop glass compositions with high magnetic properties. The study subject is the structure and magnetic properties of iron-containing silicate glasses of the SiO2-FeO-CaO system in the presence of MgO and Al2O3. The study object is the structure and magnetic properties of iron-containing silicate glasses. The study aims to obtain silicate glasses with a high content of iron oxides and study their properties. DTA and X-ray phase analysis methods were used to study the materials. The glass's relative quality factor and magnetic permeability were determined using a Q-meter. The phase diagrams of systems containing oxides SiO2, FeO, Fe2O3, CaO, MgO, Al2O3, B2O3, and K2O and selected compositions corresponding to the minimum eutectic temperatures were analysed. The studies were based on the works of N. Wojcik, А. Paladino, A., S. Zhang, М., Yu. Ebisawa, М. Plemyannikov and other scientists. The glass was synthesised at a temperature of 1300°C for 2 hours. The resulting glass was crystallised by slowly increasing the temperature to 550-800ºC for 3 hours. The results of differential thermal analysis confirmed the tendency of specific glass compositions to crystallise. According to the X-ray phase analysis results, the formation of magnetite, a ferromagnet, was confirmed. Studies of the relative quality factor and glasses' magnetic permeability confirmed the magnetic properties of the samples that were obtained. These results are consistent with theoretical studies of system state diagrams and the results of instrumental analysis methods.