Cast refractory alloys Mo–Nb–Si–B were prepared by centrifugal self-propagating high-temperature synthesis (SHS) from metallothermic mixtures containing MoO3, Nb2O5, Al, Si, and B powders, additive of Al2O3 as a temperature-moderating chemically inert agent. Variation in the acceleration amount affected composition structure cast alloys. In wide range values, combustion temperature was found to...

Here we explore the manufacturing of niobium-rich borophosphate glasses into fibers with optical quality. Glass preforms composition [(100-x) (0.95 NaPO3 + 0.05 Na2B4O7) - x Nb2O5] = 37, 38, 39, 40 were synthetized and thermally drawn. Viscosity measurements performed in softening point range show that fiber drawing temperature gradually increases amount niobium oxide. X-ray diffraction Raman s...