Hybrid sealing composite for flat solid oxide fuel cell stack

A hybrid composite sealant of a planar type solid oxide fuel cell stack, comprising:

• an inner layer comprising fibrous reinforcement particles in the range of 5˜55 volume % and first particulate reinforcement particles within first glass matrix;
• and
• one or two surface layers which are laminated onto one or both surfaces of the inner layer, comprising platelet reinforcement particles in the range of at least 10 volume % and less than 50 volume % and second particulate reinforcement particles within second glass matrix,
• wherein the sizes of the second particulate reinforcement particles are larger than those of the first particulate reinforcement particles, and
• said first and second particulate reinforcement particles are dimensionally isotropic.

A hybrid composite sealant of a planar type solid oxide fuel cell stack, comprising:

• an inner layer comprising fibrous reinforcement particles in the range of 5˜55 volume % and first particulate reinforcement particles within first glass matrix;
• and
• one or two surface layers which are laminated onto one or both surfaces of the inner layer, comprising platelet reinforcement particles in the range of 10˜40 volume % and second particulate reinforcement particles within second glass matrix,
• wherein the sizes of the second particulate reinforcement particles are larger than those of the first isotropic particulate reinforcement particles, and
• said first and second particulate reinforcement particles are dimensionally isotropic.