Thermo-Magnetic Properties Of Fe2o(3)-Doped Lithium Zinc Silicate Glass-Ceramics For Magnetic Applications

The crystallization behaviour and thermo-magnetic characteristics of glass-ceramic based on the 15Li2O-20ZnO-10CaO-55SiO2 system doped with varied Fe2O3 additions (0.0125, 0.025, and 0.05 mol) are described in this work. In some cases, Al2O3 was also added to the iron-containing sample. Glasses were successfully prepared by melt-quenching technique and converted into glass-ceramics by controlled heat-treatment, using DTA, SEM, XRD, and VSM techniques. The density, thermal expansion coefficients (TCE), and magnetic characteristics of the glass-ceramic were examined. XRD results confirmed characteristic peaks for various phases like quartz, Li2ZnSiO4, wollastonite, Li2Si2O5, ZnFe2O4, and beta-spodumene. By doping Fe2O3 and Al2O3 with lowering annealing temperature, the particle size was reduce, resulting in glass-ceramics with a more uniform and dense microstructure. The density of glass-ceramics rises from 2.74 g/cm3 to 3.45 g/cm3, whereas the TCE values in average 14-78 x 10- 7/degrees C with temperature range of 25-500 degrees C. The doped glass-ceramics have superior magnetic properties with saturation magnetization (0.143-0.548 emu/g), the coercivity force (65.116-86.359 G), and remanence magnetization (0.074-0.436 emu/g). Under an alternating magnetic field, the presence of the Znferrite phase in the glass-ceramics improves their magnetic properties and increases their heat-generating capability. Certain features of the doped glass-ceramics control the extensive variety of possibilities for their usage in various magnetic applications particularly for cancer hyperthermia treatment.