Glass-Ceramic Sealants for SOEC: Thermal Characterization and Electrical Resistivity in Dual Atmosphere

Hassan Javed, Antonio Gianfranco Sabato, Mohsen Mansourkiaei, Domenico Ferrero, Massimo Santarelli, Kai Herbrig, Christian Walter and Federico Smeacetto
Additional contact information
Hassan Javed: Sunfire GmbH, Gasanstaltstraße 2, 01237 Dresden, Germany
Antonio Gianfranco Sabato: IREC-Institut de Recerca en Energia de Catalunya, 08930 Sant Adrià de Besòs, Barcelona, Spain
Mohsen Mansourkiaei: Department of Energy (DENERG), Politecnico di Torino, 10129 Turin, Italy
Domenico Ferrero: Department of Energy (DENERG), Politecnico di Torino, 10129 Turin, Italy
Massimo Santarelli: Department of Energy (DENERG), Politecnico di Torino, 10129 Turin, Italy
Kai Herbrig: Sunfire GmbH, Gasanstaltstraße 2, 01237 Dresden, Germany
Christian Walter: Sunfire GmbH, Gasanstaltstraße 2, 01237 Dresden, Germany
Federico Smeacetto: Department of Applied Science and Technology (DISAT), Politecnico di Torino, 10129 Turin, Italy

Energies, 2020, vol. 13, issue 14, 1-12

Abstract: A Ba-based glass-ceramic sealant is designed and tested for solid oxide electrolysis cell (SOEC) applications. A suitable SiO 2 /BaO ratio is chosen in order to obtain BaSi 2 O 5 crystalline phase and subsequently favorable thermo-mechanical properties of the glass-ceramic sealant. The glass is analyzed in terms of thermal, thermo-mechanical, chemical, and electrical behavior. Crofer22APU-sealant-Crofer22APU joined samples are tested for 2000 h at 850 °C in a dual atmosphere test rig having reducing atmosphere of H 2 :H 2 O 50/50 (mol%) and under the applied voltage of 1.6 V. In order to simulate the SOEC dynamic working conditions, thermal cycles are performed during the long-term electrical resistivity test. The glass-ceramic shows promising behavior in terms of high density, suitable CTE, and stable electrical resistivity (10 6 –10 7 ? cm) under SOEC conditions. The SEM-EDS post mortem analysis confirms excellent chemical and thermo-mechanical compatibility of the glass-ceramic with Crofer22APU.

Keywords: SOEC; sealants; glass-ceramic; joining (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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