Study Of Zinc Antimonate-Phosphate Glasses

Glass formation was investigated in the ternary system ZnO-Sb2O3-P2O5. Basic physical properties & structure of glasses were studied in three compositional series:(60-x)ZnO-xSb2O3-40P2)5,50ZnO-ySb2O3-(50-y)P2O5 and 40ZnO-zSb2O3-(60-z)P2O5. Raman spectra of all glasses revealed the incorporation of Sb2O3 into the glass network by the presence of broad complex Raman bands 520-680cm-1 and 380-520cm-1. The first band was ascribed to vibrations of isolated SbO3 trigonal pyramids & the second to the vibration of Sb-O bonds in O2Sb-O-SbO2 units formed by coupling of SbO3 units. In the glasses with a higher SbO3 content, SbO3 structural units form polymer like chains similar to those in glassy SbO3.