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Design and characterization of novel glass‐ceramic sealants for solid oxide electrolysis cell ( SOEC ) applications
Author(s) -
Javed Hassan,
Sabato Antonio Gianfranco,
Herbrig Kai,
Ferrero Domenico,
Walter Christian,
Salvo Milena,
Smeacetto Federico
Publication year - 2018
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12889
Subject(s) - materials science , sealant , ceramic , thermal expansion , crystallization , glass ceramic , composite material , oxide , sintering , frit , electrolytic cell , solid oxide fuel cell , differential thermal analysis , glass transition , electrolysis , electrolyte , metallurgy , chemical engineering , polymer , electrode , chemistry , physics , optics , diffraction , engineering
In this work, three new glass‐ceramic compositions are designed and characterized as sealant materials for solid oxide electrolysis cells ( SOEC ), having operating temperature of 850°C. The crystallization and the sintering behavior of the glasses are investigated by using differential thermal analysis ( DTA ) and heating stage microscopy ( HSM ) respectively. The glasses show glass transition temperatures of 715‐740°C, while the coefficients of thermal expansion ( CTE ) of 9.3‐10.3 × 10 −6 K −1 (200‐500°C) are measured for the glass‐ceramics, matching with the CTE s of the other cell components. The compatibility between the glass‐ceramic sealants, the 3 YSZ electrolyte and the Crofer22 APU interconnect is examined by means of SEM and EDS , in the as‐joined condition and after 1000 hours at 850°C in air. Compositional changes in the glass‐ceramic sealants are reviewed and discussed with respect to the formed crystalline phases before and after the aging treatment at 850°C.