Document Type: Original Research Article
Department of Materials Science and Engineering, Shahrood University of Technology, Shahrood, Iran
Department of materials science and engineering, Shahrood University of Technology, Shahrood, Iran
In this paper, barium aluminosilicate glass sealant was synthesized and characterized for solid oxide fuel cell (SOFC) application. Firstly, the stoichiometric amount of the powders were mixed and melted at 1330° C for 2h, followed by quenching in water. The powders were then pressed into cylindrical specimen under load of 200 MPa, followed by sintering at different temperatures. The phase content and microstructure of the samples were analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM) methods respectively. Mirco-hardness and toughness of the sintered samples were investigated by the Vickers micro-hardness test. Young’s and nano-hardness of the glass seals were measured by nano-indentation method. The thermal expansion coefficient of the specimens was estimated by a dilatometer. The results showed that after sintering at 750 ℃, sealants with homogeneous microstructure and high density can be obtained. The sealant had proper mechanical and thermal properties for SOFC application with very low leak rate.