Abstract
Intermediate temperature plate type solid oxide fuel cells (IT- pSOFC) are operated at 500∼850°C, and the working gases between the two sides of electrolyte, fuel in anode chamber and air in cathode chamber, must be separated, so that a hermetic seal between cell components is essential. In this paper, a glass system based on SiO 2 -Bi 2 O 3 -Al 2 O 3 -Na 2 O-PbO 2 -ZnO was prepared and the contents were optimized to determine the best material named T24. The softening point and viscosity at high temperature calculated based on thermal expansion curve are 840 K and 10 5 Pa.s (at 1198 K), respectively. The optimum sealing temperature range is between 1138 and 1173 K. The particle size distribution curves of powders ball-milled for different time were measured by laser light scatter method. After sealing, T24 glass sealant adhered with YSZ electrolyte well and there were no perforative pores in the sealant. The open circuit voltage of single cell sealed with this sealant was near theoretical value.
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