| Title |
Effects of Substituting B2O3 for P2O5 on the Structures and Properties of V2O5-P2O5 Glass Systems (2) |
| Authors |
최수연(Su Yeon Choi); 김영석(Young Seok Kim); 김종환(Jong Hwan Kim); 정재엽(Jae Yeop Jung); 김일구(Il Gu Kim); 박현준(Hyun Joon Park); 배종성(Jong Sung Bae); 류봉기(Bong Ki Ryu) |
| DOI |
https://doi.org/10.3365/KJMM.2015.53.3.198 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
glasses; solidification; electrical conductivity; thermal analysis; catalytic effect |
| Abstract |
In this study, we verify the relationship among the catalytic effect, electrical conductivity, and structure of vanadium borophosphate glasses that have a coincidence of BO3 and BO4 and a coincidence of V4+ and V5+. We prepared vanadium borophosphate glasses with various compositions, given by 70V2O5- xB2O3-(70-x) P2O5(x=0-10mol%), and analyzed the catalytic effect, electrical conductivity, FT-IR spectroscopy, X-ray photoelectron spectroscopy, thermal properties, density, and molar volume. In V2O5-P2O5 binary glasses, the electrical conductivity increased from 0. 4073 × 10?7/Ω to 20.167 × 10?7/Ω but the catalytic effect for oxidation reactions of linoleic and stearic acid decreased with an increasing B2O3. From these results, we can deduce that electrons shift from V4+ to V5+ with an increasing B2O3. FT-IR analysis showed an occurrence peak at 680 cm?1 and XPS analysis showed that a V4+ decrease and a V5+ increase are the basis of the electron shift from V4+ to V5+. We also verify the structure and change in properties from quantitative properties such as thermal properties, density, and molar volume.(Received May 16, 2014) |