| Abstract |
| 75V2O5-10P2O5-15B2O3 ternary-system glasses were prepared, and crystallization was used to examine variations of the structural and electrical properties as well as the catalytic effect. Fourier transform infrared spectroscopy (FTIR) was used to analyze the structural changes of B-O bonds after crystallization, while an X-ray photoelectron spectroscopy (XPS) analysis showed a decrease in V5+ and an increase in V4+. An X-ray diffraction (XRD) analysis verified these inferred changes in the structure array (BO3 + V2O5 ↔ BO4 + 2VO2). Conductivity and catalytic effects were discussed based on the migration of vanadate ions with different valence states due to the increase in VO2 crystallinity. An increase in conductance and the catalytic effect were observed (as compared to the annealed sample) after crystallization at 275 ℃ for 1 h. However, an increase in conductance and a decrease in the catalytic effect (compared to the 1 h heat treated sample) were observed after crystallization at 275 ℃ for 3 and 5 h. (Received October 08, 2014) |
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| Key Words |
| glasses, annealing, crystallization, electrical conductivity, catalytic property |
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