Structure of magnetic nanoclusters in ferriferous alkali borosilicate glasses

Magnetic properties of novel magnetic porous glass-based multiferroic nanocomposites

“…The texture parameters of porous matrices were obtained by the mercury porosimetry and adsorption method (BET). The porous glass exhibited a bimodal pore diameter distribution with the 5 nm and ~50 nm, and porosity about 60% [8]. X-ray diffraction investigation revealed an amorphous structure of the matrix with the presence of weak reflections related to the crystal structure of magnetite [8].…”

“…The porous glass exhibited a bimodal pore diameter distribution with the 5 nm and ~50 nm, and porosity about 60% [8]. X-ray diffraction investigation revealed an amorphous structure of the matrix with the presence of weak reflections related to the crystal structure of magnetite [8]. A mean crystallite size of magnetite nanoparticles was estimated from XRD as 18.0 ± 0.5 nm.…”

“…The composition of the porous magnetic glasses labeled as Fe20MAP was: 80.9 % SiO 2 , 0.9 % Na 2 O, 5.3 %B 2 O 3 , 12.9% of magnetite (Fe 2+ (0.76) and Fe 3+ (1.88) ) [8]. The texture parameters of porous matrices were obtained by the mercury porosimetry and adsorption method (BET).…”

“…Porous matrices were fabricated from two-phase alkali borosilicate glass modified by iron oxide (hematite): 60% SiO 2 , 15% B 2 O 3 , 5% Na 2 O, 20% (hematite) Fe 2 O 3 (in wt. %) in the traditional way [8,[11][12]. In order to obtain two separated phases the initial glasses were heated at 550 o C. To remove the unstable sodium-boron phase the glass plates cut to 10 x 10 x 0.5 mm 3 dimensions were chemically etched in an acid solution.…”

Recent advances in the synthesis of hierarchically porous silica materials on the basis of porous glasses

“…For example, magnetic porous glasses were prepared by implementing iron oxide contents between 6 and 9 wt%. [9][10][11] These materials were used as a host matrix for different ferroelectrics (NaNO 2 and KNO 3 ). The obtained nanocomposites were characterized by interesting ferroelectric and ferromagnetic properties.…”