Structure of V_2O_5-P_2O_5-Sb_2O_3-Bi_2O_3 glass

摘要

The structure of V_2O_5-P_2O_5-Sb_2O_3-Bi_2O_3 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 (VO 3 ) n and an isolated (PO 4 ) tetrahedral with no double bond. Partial V and P are connected through O, forming an amorphous structure of layered vanadium phosphate. Trivalent Sb 3+ and Bi 3+ open the V=O bond and appear in interlayers, so a weak three-dimensional structure is connected successfully. Along with the substitution of Sb 2 O 3 for partial V 2_O_5 or that of P_2O_5 for partial V_2O_5 , the network structure of the glass is reinforced, and the crystallization is reduced.