Structure of V2O5-P2O5-Sb2O3-Bi2O3 glass

The structure of V2O5-P2O5-Sb2O3-Bi2O3 glass and its state of crystallization were studied by means of infrared spectroscopy and X-ray diffraction analysis. The results indicate that, in this glass, V and P exist mainly in the form of a single-stranded linear (VO3)(n) and an isolated (PO4) tetrahedral with no double bond. Partial V and P are connected through O, forming an amorphous structure of layered vanadium phosphate. Trivalent Sb3+ and Bi3+ open the V=O bond and appear in interlayers, so a weak three-dimensional structure is connected successfully. Along with the substitution of Sb2O3 for partial V2O5 or that of P2O5 for partial V2O5, the network structure of the glass is reinforced, and the crystallization is reduced.