Study of Structure and Crystallite Formation in the Glass System Fe2O3·Na2O·B2O3 by Use of the Mössbauer Effect

Abstract

Mössbauer techniques have been employed to identify crystal formation in the glass system Na2O·B2O3·Fe2O3 containing up to 35 wt% Fe2O3. Glasses in this system exhibit a broadened, quadrupole split doublet with a peak separation of 1.0 mm/sec, a full width at half-maximum of 0.7 mm/sec, and an isomer shift of 0.3–0.5 mm/sec with respect to Fe in Cr. The formation of crystalline material is correlated qualitatively with sample composition and preparation procedure. The sensitivity of the Mössbauer technique for identification of small amounts of crystalline material is compared with that of x-ray techniques.