Abstract: A SOFC half cell of the present invention includes: an anode functional layer (11) containing yttria-stabilized zirconia and a conductive component containing a metal oxide that changes to an electrically conductive metal in a reducing atmosphere; and a first electrolyte layer (21) containing yttria-stabilized zirconia as a main component and formed on one principal surface of the anode functional layer (11). The yttria-stabilized zirconia in the anode functional layer (11) has an yttria content of more than 9.00 mol % and 11 mol % or less, and the yttria-stabilized zirconia in the first electrolyte layer (21) has an yttria content of more than 9.00 mol % and 11 mol % or less. This half cell allows the SOFC to exhibit high power generation performance.

Abstract: The method of the present invention for producing a solid electrolyte sheet for a solid oxide fuel cells is characterized in comprising steps of obtaining a large-sized thin zirconia green sheet by molding and drying a slurry containing zirconia particles, a binder, a plasticizer and a dispersion medium; pressing the zirconia green sheet in the thickness direction with a pressure of not less than 10 MPa and not more than 40 MPa; firing the pressed zirconia green sheet at 1200 to 1500° C.; and controlling a time period when a temperature is within the range of from 500° C. to 200° C. to not less than 100 minutes and not more than 400 minutes when cooling the sheet after firing.

Abstract: A single cell for SOFC operating at low temperatures is provided, including a first solid electrolyte with oxide ion conductivity at 800° C. of 0.015 S/cm or more and bending strength of 600 MPa or more, a fuel electrode and bonded to one side of the first electrolyte, comprised of a cermet of a catalyst and a second solid electrolyte with a conductivity of 0.08 S/cm or more, and an air electrode bonded to the other side of the first electrolyte comprised of a compound of first perovskite type oxide with a third solid electrolyte. The electrodes are coated with fuel and air electrode contact layers, respectively.

Abstract: Disclosed is an electrode support substrate for a fuel cell which is even, gives a small fluctuation in gas permeability, and is capable of carrying out printing of an anodic electrode with high adhesiveness, and which comprises a ceramic sheet having a porosity of 20 to 50%, a thickness of 0.2 to 3 mm and a surface area of 50 cm2 or more wherein the variation coefficient of measured values of the gas permeable amounts of areas measured by the method according to JIS K 6400 ranges from 5 to 20% and further the surface roughness measured with a laser optical manner three-dimensional shape measuring device may be 1.0 to 40 ?m as the maximum roughness depth (Rmax) thereof.

Abstract: Disclosed is an electrode support substrate for a fuel cell which is even, gives a small fluctuation in gas permeability, and is capable of carrying out printing of an anodic electrode with high adhesiveness, and which comprises a ceramic sheet having a porosity of 20 to 50%, a thickness of 0.2 to 3 mm and a surface area of 50 cm2 or more wherein the variation coefficient of measured values of the gas permeable amounts of areas measured by the method according to JIS K 6400 ranges from 5 to 20% and further the surface roughness measured with a laser optical manner three-dimensional shape measuring device may be 1.0 to 40 ?m as the maximum roughness depth (Rmax) thereof.

Abstract: An anode support substrate excellent in redox resistance for a solid oxide fuel cell is disclosed, comprising: 40 to 80 mass % of a conductive component (A); and 20 to 60 mass % of a skeletal component (B); wherein, the support substrate has a porosity of 20 to 50%; in a mapping picture showing a cross section region of the support substrate, observed by Energy Dispersive Spectroscopy (EDS) using an energy dispersive X-ray analyzer, a portion [AB] where the conductive component (A) and the skeletal component (B) are mixed with each other exists, a portion [A] having only the conductive component (A) exists, a specified number of portions [A] are dotted; and the dotted portion [A] has a largest length of 8 to 100 ?m and an average length of 5 to 50 ?m.

Abstract: A single cell for SOFC operating at low temperatures is provided, including a first solid electrolyte with oxide ion conductivity at 800° C. of 0.015 S/cm or more and bending strength of 600 MPa or more, a fuel electrode and bonded to one side of the first electrolyte, comprised of a cermet of a catalyst and a second solid electrolyte with a conductivity of 0.08 S/cm or more, and an air electrode bonded to the other side of the first electrolyte comprised of a compound of first perovskite type oxide with a third solid electrolyte. The electrodes are coated with fuel and air electrode contact layers, respectively.

Abstract: A single cell for SOFC operating at low temperatures, is provided, including a first solid electrolyte with oxide ion conductivity at 800° C. of 0.015 S/cm or more and bending strength of 600 MPa or more, a fuel electrode and bonded to one side of the first electrolyte, comprised of a cermet of a catalyst and a second solid electrolyte with a conductivity of 0.08 S/cm or more, and an air electrode bonded to the other side of the first electrolyte comprised of a compound of first perovskite type oxide with a third solid electrolyte. The electrodes are coated with fuel and air electrode contact layers, respectively.

Abstract: A single cell for SOFC operating at low temperatures, excellent in generating performance and reliability even in a low-temperature region of the order of 600 to 900° C., and in adhesion to a separator with low current-collecting loss when used in SOFC. The cell has a first solid electrolyte with oxide ion conductivity at 800° C. of 0.015 S/cm or more and bending strength of 600 MPa or more, a fuel electrode comprised of a cermet of a catalyst and a second solid electrolyte with the conductivity of 0.08 S/cm or more, bonded to one side of the first electrolyte, and an air electrode comprised of a compound of first perovskite type oxide with a third solid electrolyte, bonded to the other side optionally via an intermediate layer comprised of a fourth solid electrolyte, and the electrodes are preferably coated with fuel and air electrode contact layers, respectively.

Abstract: Disclosed is an electrode support substrate for a fuel cell which is even, gives a small fluctuation in gas permeability, and is capable of carrying out printing of an anodic electrode with high adhesiveness, and which comprises a ceramic sheet having a porosity of 20 to 50%, a thickness of 0.2 to 3 mm and a surface area of 50 cm2 or more wherein the variation coefficient of measured values of the gas permeable amounts of areas measured by the method according to JIS K 6400 ranges from 5 to 20% and further the surface roughness measured with a laser optical manner three-dimensional shape measuring device may be 1.0 to 40 ?m as the maximum roughness depth (Rmax) thereof.

Abstract: A ceramic sheet has a burr height on the periphery of the sheet of ±100 ?m or less and/or a dimple height on the sheet surface of 100 ?m or less, as determined by irradiating the sheet with a laser beam to measure reflected light, and three-dimensionally analyzing the reflected light with a laser optical three-dimensional profiling instrument. This sheet is highly resistant to stacking-induced loads and thermal stresses. Further, when the ceramic sheet includes a zirconia ceramic partially stabilized with 2.8 to 4.5% by mole of yttria and containing 0.1 to 2% by mass of at least one dispersed reinforcing oxide, in which the grain size of the surface of the sheet has an average of 0.1 to 0.4 ?m, a maximum of 0.4 to 0.8 ?m, and a coefficient of variation of 30% or less, which grain size is determined by scanning electron microscopic observation, the ceramic sheet has satisfactory strength at room temperature and at high temperatures and satisfactory durability of strength at high temperatures.

Abstract: The present invention provides the first package (10) for brittle sheets, which comprises the brittle sheets (12) which are placed in a state of multiple layers and the end cushioning materials (20) (20) which are larger than the outer shape of the brittle sheets (12) and whose elasticity range from 2 to 100 mm and which are placed at both ends of the brittle sheets of lamination. The present invention also provides the second package for brittle sheets, which comprises the brittle sheets which are placed in a state of multiple layers, and the side cushioning material whose proof compressive load is not less than 1960 N in vertical direction and not less than 98 N in lateral direction and which is placed at the side of the said brittle sheets of lamination.

Abstract: A chelating composition containing an aliphatic polycarboxylic acid of the following formula (I): ##STR1## wherein A is an imino group or an oxygen atom, R is a hydrogen atom or a hydroxyl group, and n is 0 or 1, or the salt thereof and sugar or saccharic acid of 4 to 12 carbon atoms at such a ratio as enables the components to manifest synergistic effects is provided. This chelating composition is capable of effectively sequestering a metal ion and preventing the metal ion from being insolubilized without causing pollution of the environment.

Abstract: The epoxidation is carried out in a reaction system made of metal under conditions such that the inner surface area (S) of the reaction system exposed to the gaseous-phase part thereof and the amount of the reaction solution (V) in the reaction system satisfy the formula: 0<S/V.ltoreq.2 (m.sup.2 /m.sup.3). The epoxidation, otherwise, is carried out in a reaction vessel such that at least the inner surface thereof exposed to the gaseous-phase part thereof has been inactivated or in a reaction vessel such that at least the inner surface thereof exposed to the gaseous-phase part thereof has been inactivated. A hydroxy iminodisuccinic acid is produced by causing the epoxysuccinic acid which has been obtained as described above to react with L-aspartic acid. By this reaction, an epoxy compound can be produced with a high yield without inducing coloration by epoxidizing a corresponding ethylenic compound with hydrogen peroxide.