Network structure and thermal property of a novel high temperature seal glass
- 407 Downloads
In this study, novel glasses based on SrO–La2O3–Al2O3–B2O3–SiO2 system are investigated for solid oxide fuel and electrolyzer cells. The network structure evolution of the glasses with increasing B2O3:SiO2 ratio was studied using Raman spectroscopy. The thermal properties of the glasses, including glass transition temperature T g and glass softening temperature T d , were studied using dilatometry. The thermal stability of the glasses was investigated using X-ray diffraction. The study shows that as the B2O3:SiO2 ratio increases, the SrO–La2O3–Al2O3–B2O3–SiO2 glass micro-heterogeneity and the amount of non-bridging oxygen atoms increase. Correspondingly, the T g of the SrO–La2O3–Al2O3–B2O3–SiO2 glasses changes from 635 to 775°C, and the T d changes from 670 to 815°C. Glass thermal stability decreases with B2O3:SiO2 ratio increase. The glass without B2O3 is thermally stable after being kept at 850°C for 200 hrs.
PACS33.20.Fb 61.05.Cp 68.60.Dv 64.70.Ph
Unable to display preview. Download preview PDF.
- 1.EG & G Technical Services: Fuel Cell Handbook. US Department of Energy, Office of Fossil Energy, National Energy Technological Laboratory, Morgantown, West Virginia (2004) Google Scholar
- 6.M.K. Mahapatra, C. Story, K. Lu, W.T. Reynolds Jr., in Energy: Fuel Cells: Materials, Processing, Manufacturing and Power Management Technologies. Proc. Mater. Sci. Tech., Detroit, Michigan, USA, 16–20 September 2007, pp. 371–380 Google Scholar
- 13.J.E. Shelby, Introduction to Glass Science and Technology (Royal Society of Chemistry, Cambridge, 2005) Google Scholar
- 15.T. Furukawa, W.B. White, J. Non-Cryst. Solids 87, 38–39 (1980) Google Scholar
- 19.M. Środa, C. Paluszkiewicz, J. Mol. Struct. 302, 834–836 (2007) Google Scholar
- 20.F. Seifert, B.O. Mysen, D. Virgo, Am. Miner. 67, 696 (1982) Google Scholar
- 21.B.O. Mysen, D. Virgo, F.A. Seifert, Am. Miner. 70, 88 (1985) Google Scholar
- 25.W. Vogel, Structure and Crystallization of Glass (Pergamon, New York, 1971) Google Scholar