skip to main content

Title: Resilient Sealing Materials for Solid Oxide Fuel Cells

This report describes the development of ''invert'' glass compositions designed for hermetic seals in solid oxide fuel cells (SOFC). Upon sealing at temperatures compatible with other SOFC materials (generally {le}900 C), these glasses transform to glass-ceramics with desirable thermo-mechanical properties, including coefficients of thermal expansion (CTE) over 11 x 10{sup -6}/C. The long-term (>four months) stability of CTE under SOFC operational conditions (e.g., 800 C in wet forming gas or in air) has been evaluated, as have weight losses under similar conditions. The dependence of sealant properties on glass composition are described in this report, as are experiments to develop glass-matrix composites by adding second phases, including Ni and YSZ. This information provides design-guidance to produce desirable sealing materials.
Authors:
;
Publication Date:
OSTI Identifier:
901789
DOE Contract Number:
FG26-04NT42175
Resource Type:
Technical Report
Research Org:
The Curators Of The University Of Missouri
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; AIR; GLASS; SEALING MATERIALS; SOLID OXIDE FUEL CELLS; STABILITY; THERMAL EXPANSION