| Study of Water Resistance of Fe2O3 Doped P2O5–ZnO–Bi2O3 Sealing Glass System |
| Moon Kyung Hwang, Il Gu Kim, Bong Ki Ryu |
| Department of Materials Science and Engineering, Pusan National University, Pusan 46241, Republic of Korea |
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Received: 16 September 2015; Accepted: 5 April 2016. Published online: 5 August 2016. |
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| ABSTRACT |
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In order to strengthen the structure of the glass and ultimately improve its water resistance, P2O5–ZnO–Bi2O3 was doped with Fe2O3, which generated Fe ions in the phosphate-based glass. These ions constitute (P2O7)−4 groups within the glass network. Structural analysis using Fourier transfer infrared spectroscopy indicated that P-O-P and Bi-O-P bonds decreased and Fe-O-P bonds increased, as a function of the Fe2O3 level. The thermal property analysis found that the softening point (Ts) and glass transition point (Tg) increased approximately as much as 60 and 105 °C, respectively, and the coefficient of thermal expansion decreased approximately by 25 × 10-7 K-1. The contact angle was measured to quantify the wetting property. The contact angle increased from 42.6° to 64.1° with increasing levels of Fe2O3 at 850 °C. As an indication of water resistance, the weight loss of the 10 mol-% Fe2O3-doped glass was 0.00514 g cm-2, while that of the undoped glass was 0.00710 g cm-2. |
| Keywords:
glasses, sintering, corrosion, thermal analysis, water resistance |
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