Patent ID: 7968200

Claim:
A solid oxide fuel cell, comprising: a fuel electrode, an air electrode, a zirconia solid electrolyte and a separator bonded to this solid electrolyte, wherein the separator is formed of lanthanum-chromite oxide in which an alkali earth metal may or may be not substituted for part of the lanthanum or chromium, and a bond part between the solid electrolyte and the separator is formed from a crystalline-amorphous composite material characterized by having leucite crystals precipitated in a dispersed state in a glass matrix, and wherein the bond part is formed of the following oxide components in the following mass ratios as oxides: SiO 2 60 to 75 mass % Al 2 O 3 10 to 20 mass % Na 2 O 3 to 10 mass % K 2 O 5 to 15 mass % MgO 0 to 3 mass % CaO 0 to 3 mass % B 2 O 3 0 to 3 mass %; and wherein the thermal expansion coefficient of the crystalline-amorphous composite material making up the bond part is 9 to 10×10 −6 K −1 .