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Electrical Stability of a Novel Refractory Sealing Glass in a Dual Environment for Solid Oxide Fuel Cell Applications
Author(s) -
Chou YeongShyung,
Stevenson Jeffry W.,
Meinhardt K. D.
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03466.x
Subject(s) - materials science , isothermal process , oxide , electrical resistivity and conductivity , solid oxide fuel cell , refractory (planetary science) , microstructure , silicate , composite material , metal , metallurgy , mineralogy , chemical engineering , chemistry , electrode , electrical engineering , thermodynamics , physics , anode , engineering
A novel refractory alkaline‐earth silicate (Sr–Ca–Y–B–Si) sealing glass was developed for solid oxide fuel cell (SOFC) applications. The glass was sealed between two metallic interconnect plates and tested for electrical stability at elevated temperatures and dual environments under dc loading. The isothermal aging results showed very stable electrical resistivity with values 5–9 orders of magnititudes higher than typical SOFC function materials at 850°C for ∼700 h. For comparison, a state‐of‐the‐art sealing glass (G18, Ba–Ca–Al–B–Si) was also evaluated in a similar condition and showed a less stable condition in accelerated tests at 830°C for ∼100 h. Interfacial microstructure was characterized and possible reactions are discussed.