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GLASS AND GLASS-CERAMICS FOR SOLID OXIDE FUEL CELL HERMETIC SEALS

IP Title

GLASS AND GLASS-CERAMIC SEALANT COMPOSITIONS

Detailed Technology Description

None

Supplementary Information

Inventor: Coughlin, E. Bryan | Nozue, Yoshinobu | Seno, Shuichiro
Priority Number: US8263709B2
IPC Current: C08L004304 | C08F023008
US Class: 525209 | 526279
Assignee Applicant: University of Massachusetts,Boston | Sumitomo Chemical Company Limited
Title: Crystal nucleating agents, crystalline polymer composition, methods of manufacture thereof, and articles thereof
Usefulness: Crystal nucleating agents, crystalline polymer composition, methods of manufacture thereof, and articles thereof
Summary: The polymer composition is useful for preparing article (claimed).
Novelty: Polymer composition, useful for preparing article, comprises polymer comprising first unit derived from siloxane monomer, and a unit copolymerizable with first monomer unit, and polymer having no units derived from siloxane monomer

Industry

Chemical/Material

Sub Category

Chemical/Material Application

Application Date

Oct 15, 2004

Application No.

7,399,720

Others

*Abstract

Summary of Invention - Patent Application: The present invention relates to a glass composition useful for sealing and joining solid oxide fuel cell device components. The glass composition includes between about 45 mol % to about 55 mol % RO; between about 5 mol % to about 10 mol % M2O3; and between 40 mol % to about 45 mol % SiO2, where R is selected from the group including strontium, calcium, magnesium and zinc and combinations thereof and M is selected from the group including aluminum, boron, iron, and combinations thereof. ZnO is typically present in an amount of at least about 5 mol %.One object of the present invention is to provide an improved glassy fuel cell sealant composition. Related objects and advantages of the present invention will be apparent from the following description.Non-confidential Abstract of Invention: A novel family of ‘invert’ alkaline earth/zinc-silicate glasses have been developed that could be used for hermetic seals for solid oxide fuel cells (SOFC). The glasses wet and bond to a variety of different materials used to produce SOFC’s, including Yttria-stabilized zirconia (YSZ) and Fe/Cr-alloys used for interconnections, at or below 900 degrees Celsius. With the appropriate heat treatment, the glasses convert to crystalline pyrosilicate phases that possess coefficients of thermal expansion (CTE) comparable to YSZ. Long-term (up to 28 days) isothermal heat treatments indicate that the properties of the glass-ceramics are thermally stable and no significant reaction products are found at the seal interfaces. These new glasses can be sealed at lower temperatures and appear to possess better thermal stabilities than other glass-ceramics proposed for hermetic seals in SOFC’s.

*IP Issue Date

Jul 15, 2008

*Principal Investigator

Name: Richard Brow, Curator's Professor of Ceramic Engineering

Department:

Name: Signo Reis

Department:

Name: Glen Benson

Department:

Country/Region

USA