The crystallization and FTIR spectra of ZrO sub(2)-doped 36Fe sub(2)O sub(3)-10B sub(2)O sub(3)-54P sub(2)O sub(5) glasses and crystalline compounds

The crystallization and structure of ZrO sub(2)-doped 36Fe sub(2)O sub(3)-10B sub(2)O sub(3)-54P sub(2)O sub(5) glasses and crystalline compounds are studied by using X-ray diffraction and FTIR spectroscopy, respectively. It is found that the main crystallization is Fe sub(4)(PO sub(4)) sub(2)O, Fe sub(2)(PO sub(4))O when 36Fe sub(2)O sub(3)-10B sub(2)O sub(3)-54P sub(2)O sub(5) glass with less than 6 mol% of ZrO sub(2) is heated at 850 [degrees]C. When the doped ZrO sub(2) is larger than 6 mol% (including 6 mol%), ZrP sub(2)O sub(7) crystallization appear. Furthermore, their crystallization behaviors suggest that ZrO sub(2) can promote ZrP sub(2)O sub(7) crystallized from the ZrO sub(2)-doped 36Fe sub(2)O sub(3)-10B sub(2)O sub(3)-54P sub(2)O sub(5) glass and restrain Fe sub(4)(PO sub(4)) sub(2)O and Fe sub(2)(PO sub(4))O crystallization formed due to the (ProQuest: Formulae and/or non-USASCII text omitted) groups and (ProQuest: Formulae and/or non-USASCII text omitted) phosphate groups gradually transforming into pyrophosphate (ProQuest: Formulae and/or non-USASCII text omitted) groups with increasing content of ZrO sub(2). The knowledge provides an improved understanding of the role of Zr in the structure of iron borophosphate glasses and its crystalline compounds.