期刊
JOURNAL OF MOLECULAR STRUCTURE
卷 1081, 期 -, 页码 187-192出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molstruc.2014.10.029
关键词
Iron phosphate glass; Titanium oxide; Infrared spectroscopy; Structure
资金
- 973 program [2012CB722707]
- National Natural Science Foundation of China [91126015]
- Southwest University of Science and Technology [11zx2101, 13zx7130]
Structure and thermal properties of xTiO(2)center dot(90 - x) (60P(2)O(5)-40Fe(2)O(3))center dot 10CaF(2) (x = 0, 5, 10, 15, 20 and 25 mol%) glasses are investigated in detail by Fourier Transform Infrared Spectrum (FTIR) and Differential Thermal Analysis (DTA), respectively. It is found that incorporation of TiO2 increase the density and glass transition temperature of iron phosphate system glass. The increment of doped-TiO2 can also strengthen phosphate network chains due to increasing O/P ratios and more orthophosphate (Q(0)) units formed in the glass structure at expense of pyrophosphate (Q(1)) units and metaphosphate (Q(2)) groups. Moreover, the structure of iron phosphate glass with TiO2 content contain distorted octahedral [TiO6] linked to phosphate unit through P-O-Ti bonds, thus enhanced structure cohesion and increased density obtained. The knowledge provides an improved understanding of the role of TiO2 in the structure of iron phosphate glasses. (C) 2014 Elsevier B.V. All rights reserved.
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