Patent ID: 8097381

Claim:
A solid oxide fuel cell generator for electrochemically reacting a fuel gas with a flowing oxidant gas at an elevated temperature to produce power, said generator comprising a generator section receiving a fuel gas; a plurality of elongated fuel cells extending through said generator section and having opposing open fuel cell ends for directing an oxidant gas between opposing plena in said generator; a sealant defining a seal on said fuel cells adjacent at least one of said fuel cell ends, said sealant comprising a lanthanum borate aluminosilicate glass composition; wherein said fuel cells comprise a fuel electrode of nickel/yttria or scandia stabilized zirconia, an oxidant electrode of lanthanum manganite and an electrolyte of yttria or scandia stabilized zirconia, and said glass composition further comprises: La 2 O 3 present in an amount up to about 20 mole %; Al 2 O 3 present in an amount of between about 10 to about 20 mole %; SrO present in an amount of between about 30 to about 40 mole %; ZrO 2 present in an amount up to about 5 mole %; at least one of YO 1.5 and ScO 1.5 present in an amount up to about 0.5 mole %; and MgO present in an amount of between about 10 to about 30 mole %; and wherein said glass composition includes B 2 O 3 and SiO 2 having a combined mole percent of less than 32%.