Novel ceramic-metal composite seals derived from ceramic precursor polymers were developed in this study. The formation, microstructure and properties of composite seals were evaluated. Polymethylsiloxane was chosen as a ceramic precursor. In addition, metal and ceramic filler were mixed and pyrolyzed at 750 oC to fabricate composites. The specimen mixed with ZrO2 and Ni as filler showed a thermal expansion coefficient of 10.5 × 10-6/ oC and sealing efficient of > 98%. The microstructure of seals was observed by using Scanning Electron Microscopy (SEM). And the mechanical properties of composite seals were measured and discussed.

Keywords: Polymer derived ceramic, SOFC, Seals, Metal-ceramic composites.