Synthesis And Properties Of Ferrimagnetic Glass-Ceramics And Glass Fibers Derived From Pyrite Slag

Ferrimagnetic nano-crystal glass-ceramics and glass fibers were prepared based on the ferrosilicate glass system of SiO2-Fe2O3-B2O3-Al2O3 using large amount of pyrite slag (PS) and small quantities of pure chemicals. Two different fabrication methods were employed, eg, annealing and fiber-drawing method, without performing any nucleation and crystallization heat treatments. The influence of PS content on the magnetite spontaneous crystallization is investigated by the X-ray diffraction, FTIR, SEM, and TEM. The X-ray diffraction patterns show the presence of nanometric magnetite crystals in glass matrix. The ferrimagnetic glass fibers with a diameter of about 20 mu m were one-step drawn. The magnetic hysteresis loops of the glass-ceramic and glass fiber samples were analyzed using a vibrating sample magnetometer (VSM). Electromagnetic parameters of samples were also examined.