Abstract: An assembly structure for facilitating assembly of laminated cells, for reducing the possibility of gas leakage and for preventing the reduction of generating efficiency of cells due to the gas leakage is provided. A plate-shaped electrochemical cell made of a ceramic material with a through hole formed therein is held by a holding member. The holding member is made of a ceramic material having a planar main body with a protruded portion. A first supply hole for supplying a first gas and a second supply hole for supplying a second gas are formed in the holding member. The planar main body of the holding member has a first sealing surface against a first surface of the electrochemical cell while the protruded portion is inserted into the through hole.

Abstract: A method of producing a laminated body having a ceramic porous body having a thickness of 300 ?m or larger and a ceramic dense body having a thickness of 25 ?m or smaller. A green body for the porous body and a green body for the dense body are laminated to obtain a laminate, which is then subjected to pressure molding by cold isostatic pressing to obtain a pressure molded body. The pressure molded body is sintered to obtain a laminated sintered body. By reducing the leakage rate of helium gas of the laminated sintered body to 10?6 Pa˜m3/s or lower, the operational efficiency of the cell can be improved, and the deterioration of the cell can be prevented to improve an output after the cell is subjected to initiation and termination cycle tests of operation.

Abstract: A planar type electrochemical device 10 has a first electrochemical cell 1A and a second electrochemical cell 1B integrated with each other. Each of the electrochemical cells has a first electrode 5 contacting a first gas, a solid electrolyte 4 and a second electrode 3 contacting a second gas. The first electrode 5 is exposed to the surface of the electrochemical device. A flow route 2a for the second gas is formed in the electrochemical device.

Abstract: The invention provides an assembly structure for facilitating assembly of laminated cells, for reducing the possibility of gas leakage and for preventing the reduction of generating efficiency of cells due to gas leakage. In a disclosed embodiment, a plate-shaped electrochemical cell 9 made of a ceramic material with a through hole 9a formed therein is held by a holding member 1. The member 1 is made of a ceramic material and has a plate-shaped main body 1a of a shape of a flat plate and a protruded portion 1b. A first supply hole 2A for supplying one gas and a second supply hole 2B for supplying the other gas are formed in the holding member 1. The main body 1a has a sealing surface 1c against the one main face 9a of the cell 9 while the protruded portion 1b is inserted into the through hole 9a.

Abstract: The invention provides an assembly structure for facilitating assembly of laminated cells, for reducing the possibility of gas leakage and for preventing the reduction of generating efficiency of cells due to gas leakage. In a disclosed embodiment, a plate-shaped electrochemical cell 9 made of a ceramic material with a through hole 9a formed therein is held by a holding member 1. The member 1 is made of a ceramic material and has a plate-shaped main body 1a of a shape of a flat plate and a protruded portion 1b. A first supply hole 2A for supplying one gas and a second supply hole 2B for supplying the other gas are formed in the holding member 1. The main body 1a has a sealing surface 1c against the one main face 9a of the cell 9 while the protruded portion 1b is inserted into the through hole 9a.

Abstract: A laminated sintered body is produced having a ceramic porous body 8 having a thickness of 300 &mgr;m or larger and a ceramic dense body 9 having a thickness of 25 &mgr;m or smaller. A green body 5 for the porous body and a green body 3 for the dense body is laminated to obtain a laminate, which is then subjected to pressure molding by cold isostatic pressing to obtain a pressure molded body 6. The pressure molded body 6 is sintered to obtain a laminated sintered body. Alternatively, it is provided a laminated sintered body has a ceramic porous body having a thickness of 300 &mgr;m or larger and a ceramic dense body having a thickness of 25 &mgr;m or smaller. By reducing the leakage rate of helium gas of the laminated sintered body to 10−6 Pa·m3/s or lower, the operational efficiency of the cell can be improved, and the deterioration of the cell can be prevented to improve an output after the cell is subjected to initiation and termination cycle test of operation.

Abstract: A halogen gas plasma-resistant member to be exposed to a halogen gas plasma, includes a main body of said member, and a corrosion-resistant film formed at least a surface of said main body, wherein a peeling resistance of the corrosive film to said main body is not less than 15 MPa.

Abstract: The invention provides an assembly structure for facilitating the assembly of laminated single cells, for reducing the possibility of gas leakage after repeated cycles of temperature elevation and reduction, and for preventing the reduction of generating efficiency of cells due to the gas leakage. A plate-shaped electrochemical cell 9 made of a ceramic material with a through hole 9a formed therein is held by a holding member 1. The member 1 is made of a ceramic material and has a plate-shaped main body la of a shape of a flat plate and a protruded portion 1b protruding from the main body 1a. A first supply hole 2A for supplying one gas and a second supply hole 2B for supplying the other gas are formed in the holding member 1. The main body 1a has a sealing surface 1c against the one main face 9a of the cell 9 while the protruded portion 1b is inserted into the through hole 9a.

Abstract: A honeycomb structural body is formed by a plurality of first wall portions, a plurality of second wall portions and a plurality of cross portions. Moreover, through holes of the honeycomb structural body are respectively defined by the first wall portion, the second wall portion and the cross portion. Further, a center portion of the first wall portion is formed by a sub material other than a main material which constitutes the honeycomb structural body. The honeycomb structural body having the structure mentioned above has excellent mechanical strength and spalling resistance.

Abstract: A halogen gas plasma-resistant member to be exposed to a halogen gas plasma, includes a main body of said member, and a corrosion-resistant film formed at least a surface of said main body, wherein a peeling resistance of the corrosive film to said main body is not less than 15 MPa.

Abstract: A honeycomb-shaped electric element includes a honeycomb-shaped structural body, the honeycomb-shaped structural body including crossing partition walls defining a number of through-holes arranged thereamong, the through-holes being arranged in at least three lines extending laterally substantially in the same direction, wherein partition wall portions of the through-boles in the at least three lines are made of at least an electrically conductive material and an insulating material such that the partition wall portions of the through-holes made of the electrically conductive material and those of the insulating material are so arranged that a current flow passage may be continuously formed in the same direction as the continuous lines extend.

Abstract: A sintered laminated structure including a plurality of ceramic layers made of ceramic materials different from one another, wherein each of the ceramic layers is provided with through-holes passing each of the ceramic layers.

Abstract: A layered sintered body for an electrochemical cell which is a planar-type layered sintered body composed of an electrode and a separator stacked thereon, wherein a plurality of gas flow passages are formed by coupling grooves formed on the electrode and the separator. Even when this electrochemical cell is subjected to repetition of a cooling-heating cycle, an increase of internal resistance on and around the boundary between the separator and electrode can be restrained and layer separation and development of cracks at the joint boundary can be prevented.

Abstract: A method of forming a film of boron carbide on a substrate is provided, which comprises the steps of forming the boron carbide film on a surface of a substrate by plasma spraying, and heating the film at 1100.about.2400.degree. C. in a non-oxidizing atmosphere, whereby boron oxide contained in the boron carbide film is removed.

Abstract: A sintered laminated structure including a plurality of ceramic layers made of ceramic materials different from one another, wherein each of the ceramic layers is provided with through-holes passing each of the ceramic layers.

Abstract: A layered sintered body for an electrochemical cell which is a planar-type layered sintered body composed of an electrode and a separator stacked thereon, wherein a plurality of gas flow passages are formed by coupling grooves formed on the electrode and the separator. Even when this electrochemical cell is subjected to repetition of a cooling-heating cycle, an increase of internal resistance on and around the boundary between the separator and electrode can be restrained and layer separation and development of cracks at the joint boundary can be prevented.

Abstract: A solid oxide fuel cell having an ion conductive solid electrolyte layer formed by a spraying method, wherein a thickness of the solid electrolyte layer is not less then 40 .mu.m and not more than 100 .mu.m, and a leakage amount of N.sub.2 gas of the solid electrolyte layer at room temperature is not more than 10.sup.-5 cc/g.second. A permeation coefficient of the solid electrolyte layer is preferably not more than 10.sup.-7 cm.sup.4 /g.second at room temperature. The solid electrolyte layer includes at least one metal element selected from manganese, iron, cobalt, nickel, copper and zinc, in an average amount of not less than 1 atom % and not more than 15 atom % based on a sum of amounts of all metal elements contained in the solid electrolyte layer.

Abstract: A solid oxide fuel cell including at least one kind of an electrically conductive film formed by spraying and having a permeability constant of nitrogen gas being not more than 9.times.10.sup.-8 cm.sup.4 /g.sec. A process for producing a solid oxide fuel cell, including the steps of: forming a sprayed film on a substrate by spraying a material for the formation of an electrically conductive film, while a thickness of a sprayed film per one pass of a spraying gun is being suppressed to not more than 10 .mu.m, and then forming the electrically conductive film by thermally treating the sprayed film.

Abstract: A method for producing interconnectors for electrically connecting unit cells of a solid electrolyte type fuel cell. An interconnector material such as a perovskite complexed oxide is thermally sprayed onto the surface of an electrode of a solid electrolyte type fuel cell by plasma thermal spraying process at a temperature of not lower than 1,250.degree. C. to form an interconnector, and heat treated to diminish the cracks and defects resulting from the plasma thermal spraying process.

Abstract: A method for producing an airtight and thin lanthanum chromite film having a splendid electrical conductivity including providing an air electrode film on a porous ceramic substrate, thermally spraying a raw material for thermally spraying lanthanum chromite on a surface of the air electrode film to form a thermally sprayed film, and heat treating the thermally sprayed film to form an interconnector. The raw material for thermally spraying lanthanum chromite may contain a doping metal or metals, such as, copper, and zinc, etc. The heat treating is effected preferably at a temperature of at least 1,250.degree. C.