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US 7,007,509 B2Granted
Method of making glass compositions for ceramic electrolyte electrochemical conversion assemblies and assemblies made thereby
AssigneeFord Global Technologies, LLC
InventorGary Mark Crosbie
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Abstract
A method of making a glass composition consisting essentially by mol percent of about 55<SiO2<75; 5<BaO<30; and 2<MgO<22 for use as a matrix of composite materials. A method of making a glass matrix-ceramic particulate composition useful for sealing electrochemical structures, such as solid oxide fuel cells is also disclosed. Method steps include the admixture of finely divided Mg2SiO4 particulates with the matrix glass, to reach an overall composition by mol percent of about 55<SiO2<65; 5<BaO<15; and 25<MgO<35.
Claims6
A method of making a glass matrix-ceramic particulate composite comprising the steps of:
- (a) providing as a matrix glass, a finely divided glass powder of the glass having a composition (in mol percent) of
- 56<SiO2<75;
- 11 BaO<30;
- and
- 2<MgO<14;
- (b) providing as a particulate phase, a finely divided powder selected from the group consisting of a ceramic, a metal, and mixtures thereof;
- (c) intermixing the matrix glass with the particulate phase in an organic vehicle;
- and
- (d) firing the intermixed materials to a sealing temperature from 1100 to 1250° C.
6 more elements
Dependencies are inferred from the claim text.