Patent ID: 7399720

Claim:
A joint between at least two solid oxide fuel cell parts comprising: at least three metal oxides RO, M 2 O 3 , and SiO 2 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 M 2 O 3 is present in an amount from about 2 mol % to about 10 mol %; wherein said SiO 2 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 %.