Ceramic-metal composite body, composite structure for transporting oxide ion. and composite body having sealing property

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(Amended) A composite body comprising a structure which has a reservoir formed by combining plural members and silver or a silver alloy which has lower softening temperature than softening temperature of the members constituting said structure, and having a sealing property,

• wherein the members constituting said structure are made of ceramic and metal, said structure is constituted as combination of ceramic and metal, average linear thermal expansion coefficients from room temperature to 850° C. of the members are not lower than 16×10−6/° C. and not higher than 26×10−6/° C., at least a part of the members is made of an oxide material having oxide ion permeability, said silver or silver alloy is filled in the reservoir, and a part or the whole of a combined boundary part between the members constituting said structure is filled with said silver or silver alloy.

(Amended) A composite body comprising a structure obtained by at least combining a hollow member which has an oxide ion permeable oxide layer and is sealed at one end and a flange member, and silver or a silver alloy, the composite structure having a sealing property,

• wherein said structure is combination of metal and ceramic, has a reservoir formed by combining an open end of the hollow member and the flange member, and is obtained by filling said silver or silver alloy in the reservoir.

(Amended) A composite body obtained by combining a member which has a circular concave part and a member which has a convex part capable of being inserted into the concave part, and having a sealing property,

• wherein said members are made of combination of ceramic and metal, a reservoir formed by inserting the convex part into the concave part is filled with silver or a silver alloy, and a part or the whole of a combined boundary part between the convex part and the concave part is filled with the silver or silver alloy.

(Amended) A method of manufacturing a composite body having a sealing property, comprising the steps of:

• forming a structure having a reservoir by combining plural members which are made of combination of ceramic and metal;
• inserting at least one kind of metal material selected from metal members or metallized members which soften at lower temperature than that of the members constituting the structure into said reservoir, and
• heating at least the reservoir at temperature in a range of not lower than softening temperature of the metal material inserted into the reservoir and lower than softening temperature of the members constituting the structure so that the metal material is filled into the reservoir and at least a part of a combined boundary part between the members constituting the structure while being cured.

A ceramic-metal composite structure comprising at least one kind of ceramic which is selected from oxide ion conducting ceramic, electronic conducting ceramic, and mixed-conducting ceramic having both of oxide ion conductivity and electronic conductivity, and a metal member,

• wherein a bonding member for said ceramic and said metal member is made of silver or a silver alloy.

A ceramic-metal composite structure comprising a bonded body in which plural ceramic selected from oxide ion conducting ceramic, electronic conducting ceramic, and mixed-conducting ceramic having both of oxide ion conductivity and electronic conductivity are bonded, and a metal member,

• wherein a bonding member for the ceramic and said metal member is made of silver or a silver alloy

A method of manufacturing a ceramic-metal composite structure including at least one kind of ceramic which is selected from oxide ion conducting ceramic, electronic conducting ceramic, and mixed-conducting ceramic having both of oxide ion conductivity and electronic conductivity, and a metal member,

• wherein a noble metal clay gasket made of silver or a silver alloy, or a noble metal gasket made of silver or a silver alloy is sandwiched between bonded surfaces of the ceramic and the metal member, and heat-treated at temperature not lower than 550° C. and not higher than 950° C. to bond the ceramic and the metal member.

A method of manufacturing a ceramic-metal composite structure including a bonded body in which plural ceramic which is selected from oxide ion conducting ceramic, electronic conducting ceramic, and mixed-conducting ceramic having both of oxide ion conductivity and electronic conductivity are bonded, and a metal member,

• wherein a noble metal clay gasket made of silver or a silver alloy, or a noble metal gasket made of silver or a silver alloy is sandwiched between bonded surfaces of the ceramic and the metal member, and heat-treated at temperature not lower than 550% and not higher than 950% to bond the ceramic and the metal member.

A gasket used for a ceramic-metal composite structure which includes at least one kind of ceramic selected from oxide ion conducting ceramic, electronic conducting ceramic, and mixed-conducting ceramic having both of oxide ion conductivity and electronic conductivity, and a metal member, so that the ceramic and the metal member are connected,

• wherein the gasket is obtained by cutting out a noble metal clay sheet made of silver or a silver alloy, or a noble metal sheet made of silver or a silver alloy into a ring shape.

A gasket used for a ceramic-metal composite structure including a bonded body in which plural ceramic selected from oxide ion conducting ceramic, electronic conducting ceramic, and mixed-conducting ceramic having both of oxide ion conductivity and electronic conductivity are bonded, and a metal member, so that the ceramic and the metal member are connected,

• wherein the gasket is obtained by cutting out a noble metal clay sheet made of silver or a silver alloy, or a noble metal sheet made of silver or a silver alloy into a ring shape.

An applied device for oxygen transportation comprising a structure in which the inside of a case is parted by a composite structure including at least one kind of ceramic which is selected from oxide ion conducting ceramic, electronic conducting ceramic, and mixed-conducting ceramic having both of oxide ion conductivity and electronic conductivity, and a metal member,

• wherein a bonding member for the ceramic and said metal member is made of silver or a silver alloy.

An applied device for oxygen transportation comprising a structure in which the inside of a case is parted by a composite structure including a bonded body in which plural ceramic selected from oxide ion conducting ceramic, electronic conducting ceramic, and mixed-conducting ceramic having both of oxide ion conductivity and electronic conductivity are bonded, and a metal member,

• wherein a bonding member for the ceramic and said metal member is made of silver or a silver alloy.

A composite structure for transporting oxide ions comprising a tubular main part sealed at one end and a flange bonded to the opening side of the main part,

• wherein said main part is obtained by covering a porous ceramic base with an oxide ion transporting ceramic dense film, said flange is a tubular body made of dense electronic conducting ceramic, oxide ion transporting ceramic, or electrical insulating ceramic, and the outer dimension of a part or the whole of said flange in its radial direction is larger than the outer dimension of said tubular main part in the long diameter direction.