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US 2008/0176731 A1Published application
Glass and glass-ceramic sealant compositions
OwnerRichard K. Brow, Signo Tadeu Dos Reis +1inventors
InventorsRichard K. Brow, Signo Tadeu Dos Reis, Glendon M. Benson
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Abstract
A glass composition for use as a sealant or otherwise bonded to a fuel cell component, including from about 40 mol % to about 60 mol % RO; from about 2 mol % to about 10 mol % M2O3; and from about 35 mol % to about 45 mol % SiO2. R is selected from the group including strontium, calcium, magnesium and zinc and combinations thereof. M is selected from the group including aluminum, boron, lanthanum, iron and combinations thereof. The glass includes at least about 5 mol % ZnO. Upon heat treatment, the glass at least partially crystallizes with the formation of at least one alkaline earth-zinc pyrosilicate crystalline phases.
Claims64
A glass ceramic material sealed device, comprising in combination:
- a first substrate;
- and
- a sealant layer bonded to the first substrate;
- wherein the sealant layer includes at least three metal oxides RO-M2O3-SiO2 combined together;
- wherein R is selected from the group consisting of zinc, strontium, calcium, magnesium and combinations thereof;
- wherein M is selected from the group including aluminum, boron, lanthanum, iron and combinations thereof;
- wherein RO is present in an amount of between about 45 mol % and about 55 mol %;
- wherein the M2O3 is present in an amount of between about 5 mol % and about 10 mol %;
- wherein said SiO2 is present in an amount of about 40 mol %;
- and
- wherein the RO includes ZnO present in an amount of at least about 5 mol %.
8 more elements
A glass ceramic material sealed device, comprising in combination:
- a substrate;
- and
- a sealant layer bonded to the substrate;
- wherein the sealant layer has a composition of X[(RO)·(M2O3)·(SiO2)]Y(QO2);
- wherein 0.95≦X≦1.0;
- wherein 0≦Y≦0.05;
- wherein Q is selected from the group consisting of titanium, zirconium and combinations thereof;
- wherein R is selected from the group consisting of strontium, calcium, magnesium, zinc and combination thereof;
- wherein M is selected from the group consisting of aluminum, boron, lanthanum, iron and combinations thereof;
- wherein the RO is present in an amount of about 50 mol %;
- wherein the M2O3 is present in an amount of about 5 mol %;
- wherein the SiO2 is present in an amount of about 45 mol %;and wherein R contains at least about 5 mol % zinc.
9 more elements
A joint between at least two solid oxide fuel cell parts comprising:
- at least three metal oxides RO, M2O3, and SiO2 combined together;
- wherein R is selected from the group consisting of strontium, calcium, magnesium and zinc and combinations thereof;
- wherein M is selected from the group consisting of aluminum, boron, lanthanum, iron and combinations thereof;
- wherein the joint substantially matches a coefficient of thermal expansion of at least two solid ceramic parts;
- wherein the RO is present in an amount from about 40 mol % to about 60 mol %;
- wherein the M2O3 is present in an amount from about 2 mol % to about 10 %;
- wherein said SiO2 is present in an amount from about 35 mol % to about 45 mol %;
- and wherein ZnO is present in an amount of at least about 5 mol %.
5 more elements
A method of joining at least two solid ceramic parts, comprising the steps of:
- (a) providing a blend of RO, M2O3, and SiO2 that substantially matches a coefficient of thermal expansion of the at least two solid ceramic parts, wherein R is selected from the group consisting of strontium, calcium, magnesium and zinc and combinations thereof, and M is selected from the group consisting of aluminum, boron, lanthanum, iron and combinations thereof;
- (b) placing the blend at an interface of said at least two ceramic parts as a pre-assembly;
- (c) heating the pre-assembly to a temperature sufficient to cause the blend to flow into said interface as an assembly;
- and
- (d) cooling the assembly and solidifying said blend thereby joining the at least two ceramic parts;
- wherein ZnO if present in an amount of at least 5 mol %;
- wherein RO is present in an amount from about 40 mol % to about 60 mol %;
- wherein the M2O3 is present in an amount from about 2 mol % to about 10 mol %;
- and
- wherein the SiO2 is present in an amount from about 35 mol % to about 45 mol %.
7 more elements
A method of joining a ceramic piece to a second piece, comprising the steps of:
- (a) providing a glass powder having a composition of RO, M2O3, and SiO2 that substantially matches a coefficient of thermal expansion of the at least two solid ceramic parts, wherein R is selected from the group consisting of strontium, calcium, magnesium and zinc and combinations thereof, and M is selected from the group consisting of aluminum, boron, lanthanum, iron and combinations thereof;
- wherein the RO is present in an amount from about 40 mol % to about 60 %;
- wherein ZnO if present in an amount of at least about 5 mol %;
- wherein the M2O3 is present in an amount from about 2 mol % to about 10 mol %;
- and wherein the SiO2 is present in a amount from about 35 mol % to about 45 mol %.
- (b) placing the glass powder at an interface of the ceramic piece and the second piece as a pre-assembly;
- (c) heating the pre-assembly to a temperature sufficient to cause the glass powder to soften and flow into said interface to form an interfacial layer;
- and
- (d) cooling and solidifying the interfacial layer thereby joining the ceramic piece and the second piece.
6 more elements
A glass composition, comprising:
- about 45 mol % to about 55 mol % RO;
- about 5 mol % to about 10 mol % M2O3;
- and
- about 40 mol % to about 45 % SiO2;
- wherein R is selected from the group consisting of strontium, calcium, magnesium and zinc and combinations thereof,
- wherein M is selected from the group consisting of aluminum, boron, lanthanum, iron and combinations thereof;
- and
- wherein ZnO is present in an amount of at least about 5 mol %.
5 more elements
A glass ceramic material sealed fuel cell device, comprising in combination:
- a first fuel cell portion;
- and
- a sealant layer bonded to the first cell portion;
- wherein the sealant layer includes at least three metal oxides RO-M2O3-SiO2 combined together;
- wherein R is selected from the group consisting of zinc, strontium, calcium, magnesium and combinations thereof;
- wherein M is selected from the group including aluminum, boron, lanthanum, iron and combinations thereof;
- wherein RO is present in an amount of between about 45 mol % and about 55 mol %;
- wherein the M2O3 is present in an amount of between about 5 mol % and about 10 mol %;
- wherein said SiO2 is present in an amount of about 40 mol %;
- and
- wherein the RO includes RnO present in an amount of at least about 5 mol %.
8 more elements
A glass ceramic material sealed fuel cell device, comprising in combination:
- a solid oxide fuel cell component;
- and
- a sealant layer bonded to the substrate;
- wherein the sealant layer has a composition of X[(RO)·(M2O3)·(SiO2)]Y(QO2);
- wherein 0.95≦X≦1.0;
- wherein 0≦Y≦0.05;
- wherein Q is selected from the group consisting of titanium, zirconium and combinations thereof;
- wherein R is selected from the group consisting of strontium, calcium, magnesium, zinc and combination thereof;
- wherein M is selected from the group consisting of aluminum, boron, lanthanum, iron and combinations thereof;
- wherein the RO is present in an amount of about 50 mol %;
- wherein the M2O3 is present in an amount of about 5 mol %;
- wherein the SiO2 is present in an amount of about 45 mol %;
- and wherein R contains at least about 5 mol % zinc.
10 more elements
A solid oxide fuel cell comprising:
- a first ceramic oxide electrolyte layer;
- a second ceramic oxide electrolyte layer;
- and
- a joint layer bonded disposed between and bonded to the first and second ceramic oxide electrolyte layers;
- wherein the joint layer has a composition of X[(RO)·(M2O3)·(SiO2)]Y(QO2);
- wherein 0.95≦X≦1.0;
- wherein 0≦Y≦0.05;
- wherein Q is selected from the group consisting of tatanium, zirconium and combinations thereof;
- wherein R is selected from the group consisting of strontium, calcium, magnesium, zinc and combinations thereof;
- wherein M is selected from the group consisting of aluminum, boron, lanthanum, iron, and combinations thereof;
- wherein the RO is present in an amount of about 50 mol %;
- wherein the M2O3 is present in an amount of about 5 mol %;
- wherein the SiO2 is present in an amount of about 45 mol %;
- and wherein R contains at least about 5 mol % zinc.
11 more elements
A solid oxide fuel cell system, comprising:
- a first ceramic oxide electrolyte layer;
- a second ceramic oxide electrolyte layer;
- and
- a joint layer bonded disposed between and bonded to the first and second ceramic oxide electrolyte layers;
- wherein the joint layer includes at least three metal oxides RO-M2O3-SiO2 combined together;
- wherein R is selected from the group consisting of zinc, strontium, calcium, magnesium and combinations thereof;
- wherein M is selected from the group consisting of aluminum, boron, lanthanum, iron and combinations thereof;
- wherein the RO is present in an amount of between about 45 mol % and about 55 mol %;
- wherein the M2O3 is present in an amount of between about 5 mol % and about 10 mol %;
- wherein said SiO2 is present in an amount of about 40 mol %;
- and
- wherein the RO includes ZnO present in an amount of at least 5 mol %.
9 more elements
A fuel cell device having a joint disposed between at least two solid oxide fuel cell parts comprising:
- a first solid oxide fuel cell electrolyte layer;
- a second solid oxide fuel cell electrolyte layer;
- a joint layer bonded between the first and second solid oxide fuel cell electrolyte layers and further comprising:
- at least three metal oxides RO, M2O3, and SiO2 combined together;
- wherein R is selected from the group consisting of strontium, calcium, magnesium and zinc and combinations thereof;
- wherein M is selected from the group consisting of aluminum, boron, lanthanum, iron and combinations thereof;
- wherein the joint substantially matches a coefficient of thermal expansion of at least two solid ceramic parts;
- wherein the RO is present in an amount from about 40 mol % to about 60 mol %;
- wherein the M2O3 is present in an amount from about 2 mol % to about 10 mol %;
- wherein said SiO2 is present in an amount from about 35 mol % to about 45 mol %;
- and
- wherein ZnO is present in an amount of at least about 5 mol %.
9 more elements
Dependencies are inferred from the claim text.