Compliant sealants for solid oxide fuel cells and other ceramics

Title: Compliant sealants for solid oxide fuel cells and other ceramics

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Abstract

A glass or glass-ceramic sealant is described for a SOFC having a coefficient of thermal expansion in the range of from about 8 to about 13{times}10{sup {minus}6}/C and a viscosity of at least 10{sup 3}Pa-s at cell operating temperature. The sealant has a composition of SrO present in the range of from about 5 to about 60 mole percent, La{sub 2}O{sub 3} present in the range of from 0 to about 45 mole percent, Al{sub 2}O{sub 3} present in the range from 0 to about 15 mole percent, B{sub 2}O{sub 3} present in the range of from about 15 mole percent to about 80 mole percent, and SiO{sub 2} present in the range of from 0 to about 40 mole percent, wherein the material is a viscous fluid at cell operating temperatures of from about 600 C to about 1000 C. The sealant may also be compounds of CaO present in the range of from 0 to about 35 mole percent, Al{sub 2}O{sub 3} present in the range from 0 to about 15 mole percent, B{sub 2}O{sub 3} present in the range of from about 35 mole percent to about 85 mole percent, and SiO{sub 2} present in the rangemore »« less

Inventors:: Bloom, I D; Ley, K L

Issue Date:: 1995-09-26

Research Org.:: Univ. of Chicago, IL (United States)

OSTI Identifier:: 106697

Patent Number(s):: 5,453,331

Application Number:: PAN: 8-289,751

Assignee:: Univ. of Chicago, IL (United States)

DOE Contract Number:: W-31109-ENG-38

Resource Type:: Patent

Resource Relation:: Other Information: PBD: 26 Sep 1995

Country of Publication:: United States

Language:: English

Subject:: 30 DIRECT ENERGY CONVERSION; SOLID ELECTROLYTE FUEL CELLS; SEALS; DESIGN; CHEMICAL COMPOSITION; STRONTIUM OXIDES; LANTHANUM OXIDES; ALUMINIUM OXIDES; BORON OXIDES; SILICON OXIDES; CALCIUM OXIDES; MOLTEN SALTS

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                    Bloom, I D, and Ley, K L. Compliant sealants for solid oxide fuel cells and other ceramics.  United States: N. p., 1995. 
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                    Bloom, I D, & Ley, K L. Compliant sealants for solid oxide fuel cells and other ceramics.  United States.

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                    Bloom, I D, and Ley, K L. Tue .  
        "Compliant sealants for solid oxide fuel cells and other ceramics".  United States.

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@article{osti_106697,

  title        = {Compliant sealants for solid oxide fuel cells and other ceramics},

  author       = {Bloom, I D and Ley, K L},

  abstractNote = {A glass or glass-ceramic sealant is described for a SOFC having a coefficient of thermal expansion in the range of from about 8 to about 13{times}10{sup {minus}6}/C and a viscosity of at least 10{sup 3}Pa-s at cell operating temperature. The sealant has a composition of SrO present in the range of from about 5 to about 60 mole percent, La{sub 2}O{sub 3} present in the range of from 0 to about 45 mole percent, Al{sub 2}O{sub 3} present in the range from 0 to about 15 mole percent, B{sub 2}O{sub 3} present in the range of from about 15 mole percent to about 80 mole percent, and SiO{sub 2} present in the range of from 0 to about 40 mole percent, wherein the material is a viscous fluid at cell operating temperatures of from about 600 C to about 1000 C. The sealant may also be compounds of CaO present in the range of from 0 to about 35 mole percent, Al{sub 2}O{sub 3} present in the range from 0 to about 15 mole percent, B{sub 2}O{sub 3} present in the range of from about 35 mole percent to about 85 mole percent, and SiO{sub 2} present in the range of from 0 to about 30 mole percent. 2 figs.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1995},

  month        = {9}

}

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