Bonding materials for anode to anode bonding and anode to interconnect bonding in solid oxide fuel cells

An anode/interconnect bonding material for anode material to interconnect material bonding in a solid oxide fuel cell stack, said bonding material comprising a powder having 1-50 wt % reactive ingredients and at least one oxide selected from the group of nickel oxide, zirconium oxide, cobalt oxide, calcium oxide and strontium oxide, and additionally comprising at least one of the following materials:

• 0-20 wt % lanthanum oxide, 0-20 wt % chromium oxide, 0-30 wt % | lanthanum chromite, 1-20 wt % alumina, 0-20 wt % binder, 0-20 wt % plasticizer, 0-10 wt % rice or corn starch, and 0-85 wt % solvent, said reactive ingredients being selected from the group consisting of oxides of tungsten, tantalum, niobium, molybdenum, and titanium, and compounds of these oxides with nickel, zirconium, silicon, and aluminum, said binder being selected from the group consisting of polyvinyl butyryl resin, polyvinyl alcohol, synthetic rubber, plastics, cellulose, and polymer systems which thermally decompose without cross linking, said plasticizer being selected from the group consisting of butyl benzyl phthalate and the phthalate group, said solvent being an inorganic or organic solvent which evaporates at room temperature or at elevated temperatures, said oxides used in the bonding composition being capable of being substituted by their precursors from which the oxides are derived, and including nitrates, carbonates, organo-metallic materials, or the corresponding metal elements themselves, said bonding material being applied as an interlayer between the faying surfaces of the anode and interconnect material pairs to be bonded and the bonding operation being completed at subsintering temperatures of 1000.degree.-1300.degree. C. with or without a compression pressure.