Abstract: A precursor tape casting method is one in which chemical precursors are converted into a final chemical phase from green tapes to products. Because chemical precursors are employed rather than the final powder materials, sintering is not required to form the material. Lower annealing temperatures instead of high temperature sintering allow the formation of grains of about 1 to about 100 nanometers in the final material. In addition, when the final material is a magnetic/insulator composite, improved magnetic properties may be obtained.

Abstract: A high-reliability ceramic composite multilayer substrate that has excellent flatness and few remaining pores, can be produced at a low cost while simplifying the manufacturing process, and can eliminate layer separation or separation from a mother board. The ceramic composite multilayer substrate includes a laminate containing a first ceramic layer and a second ceramic layer that is disposed so as to contact the first ceramic layer and suppresses firing shrinkage in the plane direction of the first ceramic layer. The laminate includes a resin/ceramic composite layer in which porous ceramic is impregnated with a resin formed on at least one principal surface of the laminate.

Abstract: EMR-transmissive window assemblies comprising an EMR-transmissive substrate mounted in a substantially rigid framework structure and sealed to the metallic framework structure by means of a ceramic material having a partially amorphous and partially crystalline structure are disclosed. Methods for fabricating EMR-transmissive assemblies are also disclosed.

Abstract: The interlocking of two or more sections via the insertion of one or more out-of-plane features in one section or combination of sections through a void in one or more a complementary sections can result in a reinforced ceramic matrix composite article upon securing of the sections. The sections can be secured by friction between two tightly matched sections or by the use of a pin, hook, or clamp. The sections can be constructed from one or more CMC laminate sheets. The out-of-plane feature can be a loop or a flange and the void can be an orifice or a matched loop in the complementary sheet. The securing of the sections can result in a CMC article where the delamination between sheets is inhibited.

Abstract: A ceramic material includes lead zirconate titanate, which additionally contains Nd and Ni.

Abstract: The package for a light emitting element according to the present invention comprises a base substrate made of ceramic including glass, and a frame body made of ceramic. The frame body is arranged on a top surface of the base substrate and provided therein with a cavity for accommodating the light emitting element. A part of the glass included in the base substrate is precipitated in an area of the top surface of the base substrate, which is a bottom surface of the cavity, and a crystallinity degree of the precipitated glass is greater than 3%. In the manufacturing method of the package according to the present invention, a ceramic body which is to be the package is fired at a temperature of 840 degrees C. or higher and lower than 950 degrees C.

Abstract: A production method for laminated glass capable of performing a firing step for a fired substance and a bend-forming step to an inner sheet and an outer sheet in the same forming furnace when laminated glass having a fired substance between an inner sheet and an outer sheet is produced, whereby the inner sheet and the outer sheet overlap each other with high accuracy and a production device thereof, are provided. A production method for laminated glass having a fired substance between an inner sheet 2 and an outer sheet 3 wherein a firing step for firing a fired substance in a state that the inner sheet 2 and the outer sheet 3 are kept away and a bend-forming step in a state that the inner sheet 2 and the outer sheet 3 overlap each other, is carried out in the same forming furnace.

Abstract: The invention relates to a method for joining ceramic composite parts comprising at least one ceramic material and at least one superhard material to at least one other part, the method comprising treatment of a join surface or surfaces of the ceramic composite part; and disposition onto the treated surface or surfaces, or portions thereof, of a material capable of bonding to the ceramic composite part as well as to the at least one other part upon the application of sufficient heat. The invention extends to articles comprising a ceramic composite part comprising ceramic material and at least one superhard material, bonded to at least one other part, the article including at least one layer selected from an attachment layer, a brazeable layer, and an oxidation resistant (braze compatible) layer or combinations thereof included at an interface between the ceramic composite part and the other part.

Abstract: A method for joining at least one first ceramic joining partner with at least one second joining partner includes: depositing at least one preceramic polymer on the first and/or the second joining partner in a joining region, bringing together the joining partners in the joining region, and heating the joining region such that the preceramic polymer transforms into an amorphous and/or crystalline ceramic that connects the joining partners to each other.

Abstract: In a method for manufacturing a powder magnetic core, magnetic layer green sheets is formed by using magnetic metal particles having an insulating oxide layer on a surface thereof, and insulating layer green sheets are formed by using insulating particles. The magnetic layer green sheet and the insulating layer green sheet are alternately laminated, and the layers are press molded.

Abstract: A ceramic honeycomb structure body (1) including a configuration in which a plurality of porous honeycomb segments (2) are bound one another with an adhesive layer (3) interposed between each two neighboring porous honeycomb segments (2), where a plurality of protrusion portions (4) fixed to one of the adhesion surfaces (2a, 2b) respectively of two honeycomb segments (2, 2) opposed to each other with the adhesive layer (3) interposed between the two honeycomb segments (2, 2) are embedded into the adhesive layer (3).

Abstract: A process for joining, by spark plasma sintering, at least two refractory ceramic parts, each of the parts having at least one surface to be joined by spark plasma sintering, in which surfaces to be joined are brought into contact without addition of any sort between the surfaces. Then, a joining pressure of 1 to 200 MPa is applied to the ceramic parts. A pulsed electric current having an intensity of 500 A to 8000 A is applied to the ceramic parts so as to raise the temperature of the parts to a joining temperature of at least 1300° C. Then, the electric current is terminated simultaneously with the pressure, and the parts are cooled, and the joined parts are recovered.

Abstract: A dopant host containing, in terms of mole %, 20 to 50% SiO2, 30 to 60% (exclusive of 30%) Al2O3, 10 to 40% B2O3, and 2 to 10% RO, wherein R represents an alkaline earth metal, or including a laminate including a boron component volatilization layer containing, in terms of mole %, 30 to 60% SiO2, 10 to 30% Al2O3, 15 to 50% B2O3, 2 to 10% RO, wherein R represents an alkaline earth metal, and a heat resistant layer containing, in terms of mole %, 8 to 30% SiO2, 50 to 85% Al2O3, 5 to 20% B2O3, and 0.5 to 7% RO, wherein R represents an alkaline earth metal. A process for producing a boron dopant for a semiconductor includes the steps of slurrying a starting material powder containing a boron-containing crystalline glass powder, forming the slurry to prepare a green sheet, and sintering the green sheet.

Abstract: A method for utilizing plastic deformation resulting from grain boundary sliding with or without a novel joint compound that leads to the joining of advanced ceramic materials, intermetallics, and cermets. A joint formed by this approach is as strong as or stronger than the materials joined. The method does not require elaborate surface preparation or application techniques. The method also allows for the formation of transparent joints between two subunits of a construct joined via plastic deformation. The method can be used to tailor residual stresses and maintain native porosity.

Abstract: A method of manufacturing a honeycomb structure having a plugged portion, wherein a mask is applied to the honeycomb structure, a plugging material is supplied on the mask or on the same plane as a surface of the mask, and a pressurizing apparatus disposed at an acute angle with respect to the surface of the mask and having a pressurizing face for pressurizing the plugging material is moved to fill the plugging material into the cells of the honeycomb structure. The pressurizing apparatus is moved on the mask with a part of the region of the pressurizing face being brought into surface contact with the mask via the plugging material to pressurize the plugging material toward the cell side and to push out an extra plugging material in the direction of movement to further pressurize and fill the material into the cells with forming the region of the surface contact.

Abstract: This invention relates to polymer derived ceramics (PDC's) and more particularly, to methods and product made by using polymeric derived ceramic precursors to synthesize dense, crack-free bulk ceramics in a technique using sacrificial molds, coating processes, replication processes, assembly processes and finishing processes; where gas release paths are created and maintained during these processes to release gases generated during pyrolysis of the ceramic precursor. It is a primary objective of the present invention to provide a well defined method to create PDC voxels which are interconnected as a bulk (high density) material. Such a material is effectively a lattice with face centered cubic or hexagonal close pack geometry. A second objective of the present invention is to provide a method for bulk, high density material to be combined with fully dense material in a hybrid material.

Abstract: The present invention relates to a method of manufacturing a ceramic board comprises the steps of forming a green ceramic board 11 by laminating at least a plurality of green sheets, forming a unit 8 comprising the green ceramic board 11 and a fired porous ceramic body 5, in which both main surfaces 11a and 11b of the green ceramic board are directly sandwiched between fired porous ceramic bodies 5a and 5b, and firing said unit 8. Many through-holes penetrating the front and back surfaces are formed in said fired porous ceramic bodies 5a and 5b. According to the present invention, it is possible to provide a method of manufacturing a ceramic board, being flat and having no firing, stain, easily and efficiently.

Abstract: A ceramic paste is applied to a first glass sheet 11, and a ceramic paste is applied to a second glass sheet 13 with a lower solar absorptivity than that of the first glass sheet 11. In this case, the amount per unit area of the ceramic paste to be applied to the first glass sheet 11 is allowed to be smaller than that of the ceramic paste to be applied to the second glass sheet 13. Alternatively, a first ceramic paste and a second ceramic paste are allowed to have different compositions from each other. The first glass sheet 11 and the second glass sheet 13 are bent so that the surfaces onto which the ceramic pastes have been applied are shaped as concave surfaces. The applied ceramic paste is fired using the heating used for bending. Thus maskings 12 and 14 are formed. The first glass sheet 11 and the second glass sheet 13 are bonded to each other, with a resin interlayer film 15 being interposed therebetween.

Abstract: The present invention is directed to anti-reflective coatings comprising ordered layers of nanowires, methods to prepare the coatings, and products prepared by the methods.

Abstract: A CMC article and process for producing the article to have a layer on its surface that protects a reinforcement material within the article from damage. The method entails providing a body containing a ceramic reinforcement material in a matrix material that contains a precursor of a ceramic matrix material. A fraction of the reinforcement material is present and possibly exposed at a surface of the body. The body surface is then provided with a surface layer formed of a slurry containing a particulate material but lacking the reinforcement material of the body. The body and surface layer are heated to form the article by converting the precursor within the body to form the ceramic matrix material in which the reinforcement material is contained, and by converting the surface layer to form the protective layer that covers any fraction of the reinforcement material exposed at the body surface.

Abstract: A method to control the post sinter distortion of hot pressing sintered multilayer ceramic laminate by placing a non-densifying structure in the green ceramic laminate prior to sintering. One or more non-densifying structures are placed on one or more ceramic greensheets which are then stacked and laminated to form a green ceramic laminate. The laminate is then sintered and the non-densifying structure will control the dimensions of the hot pressed multilayer ceramic substrate. The method can be used to control post sinter dimensions in MLC substrates manufactured as either single or multi-up substrates by placing the non-densifying structure in the kerf area between the individual product ups prior to sintering.

Abstract: A membrane structure is provided. A membrane structure has a top surface and a bottom surface. The membrane structure includes a plurality of sintered layers including an inner layer disposed between two outer layers. The membrane structure further includes a nonmonotonic gradient in pore size extending between the top surface and the bottom surface. A method of making a membrane structure is provided. The method includes the steps of providing at least one inner layer; providing a plurality of outer layers; and laminating the inner layer and the outer layers to obtain a membrane structure.

Abstract: A gripping jig for assembling applies a force to a molded body in a direction perpendicular to an assembling direction. When an assembling load is applied to the molded body, the force is adjustable with an adjustment screw such that the molded body is guided to move in the assembling direction. Since the force is applied from a direction different from the assembling direction, the molded body can move in the assembling direction, and as the force is adjustable, application of the assembling load to the molded body and movement of the molded body can be adjusted. Since a plurality of molded bodies are fixed and assembled respectively, when there are variations in size of the molded bodies, if an excessive assembling load is applied, each molded body is guided to move, so that more uniform assembling load is applied to the plurality of molded bodies.

Abstract: The invention concerns a method for producing a ceramic filter body (1) for filtering an exhaust gas stream (2) of a diesel engine. The filter body (1) has planar and porous filter sections (3) that are designed to be passed by the exhaust gas flow (2) in a direction transverse to the face of the filter sections (3). A planar permeable fiber web (4, 4?), in particular of filter paper, is first impregnated with finely ground ceramic material (6) only across sections under formation of a non-impregnated section (12). The only partially ceramic-impregnated fiber web (4, 4?) is subsequently brought into the shape of a blank of the filter body (1) in such a way that the impregnated areas of the fiber web (4, 4?) assume the shape of the filter body (1).

Abstract: A method of joining at least two sintered bodies to form a composite structure, includes: providing a joint material between joining surfaces of first and second sintered bodies; applying pressure from 1 kP to less than 5 MPa to provide an assembly; heating the assembly to a conforming temperature sufficient to allow the joint material to conform to the joining surfaces; and further heating the assembly to a joining temperature below a minimum sintering temperature of the first and second sintered bodies. The joint material includes organic component(s) and ceramic particles. The ceramic particles constitute 40-75 vol. % of the joint material, and include at least one element of the first and/or second sintered bodies. Composite structures produced by the method are also disclosed.

Abstract: A method for forming a ceramic layer on the surface of a turbine component. This method comprises the following steps: (a) providing a turbine component having a surface; (b) providing at least one ceramic tape overlaying the component surface; and (c) manually pressing the at least one ceramic tape against the component surface at a temperature of from about 150° to about 700° F. (from about 66° to about 371° C.) so as to cause the at least one ceramic tape to adhere to the component surface.

Abstract: A light emitting diode reflector molding process, and a construction thereof includes preparation of a first and a second green sheet structures respectively provided with a first and a second open patterns with the porosity of the second open pattern smaller than that of the first open pattern; the second green sheet structure being placed on top of the first green sheet structure to such that both opening patterns being overlapped to each; a metallic layer being coated on the second green sheet structure, the second green sheet structure being molded along the opening pattern of and covering upon the first green sheet for the metallic layer to become the wall of the reflector opening.

Abstract: Transfer films for firing which have the excellent property of transferring a functional pattern and enable a pyrolysis gas generated by the firing of organic substances to be released smoothly, and which can form on a substrate a functional pattern free from defects such as a shape or function failure. One of the transfer films for firing comprises a release film and a multilayered structure formed so as to be in contact with one of the surfaces of the release film. The multilayered structure includes both a pressure-sensitive adhesive layer for bonding the transfer film for firing to a surface of a substrate and a functional pattern formed between the release film and the pressure-sensitive adhesive layer. The functional pattern comprises inorganic particles and a first organic substance removable by firing, and the pressure-sensitive adhesive layer comprises a second organic substance removable by firing and different from the first organic substance.

Abstract: This invention generally pertains to self propagating high temperature synthesis or combustion synthesis as a way of bonding materials. The present invention provides methods and an apparatus for bonding, preferably carbon-carbon composite materials, by combustion synthesis. Generally, the invention involves providing at least two carbon-carbon composite parts to be bonded and interspersing a combustion synthesis material in between the parts with each part in contact with the combustion synthesis material. The combustion synthesis material is then ignited, which initiates the combustion synthesis reaction. Typically, a ceramic material is formed which immediately freezes, bonding the parts together.

Abstract: Amid 10 having concave portions 13 having a predetermined shape in front view is prepared. A slurry 20 is filled into the concave portions 13. The mold 10 storing the slurry 20 is placed on an upper surface of the ceramic green sheet 30. A pressure inside the sheet 30 is lowered through a pile 51 and a sintered metal 40. The sheet is heated by a hot plate 60. With these, a solvent in the slurry 20 is permeated into fine pores of the sheet 30 to be evaporated. The pre-dried 3-D forming portion is dried without deformation.

Abstract: A method of manufacturing a multilayer ceramic substrate having a cavity includes preparing a first ceramic laminate having an opening for forming a cavity, and a second ceramic laminate which is to be provided on a bottom surface of the first ceramic laminate, forming a polymer layer in a region corresponding at least to the opening, on a top surface of the second ceramic laminate, forming a desired multilayer ceramic laminate by laminating the first and second ceramic laminates such that the polymer layer of the second ceramic laminate is placed under the opening, laminating first and second constraining layers on a top surface and a bottom surface of the multilayer ceramic laminate, respectively, and sintering the multilayer ceramic laminate including the laminated first and second constraining layers. Accordingly, the strength of a low temperature co-fired ceramic (LTCC) substrate having a cavity is enhanced, and an effective area for mounting built-in devices can be increased.

Abstract: A precursor of a ceramic adhesive suitable for use in a vacuum, thermal, and microgravity environment. The precursor of the ceramic adhesive includes a silicon-based, preceramic polymer and at least one ceramic powder selected from the group consisting of aluminum oxide, aluminum nitride, boron carbide, boron oxide, boron nitride, hafnium boride, hafnium carbide, hafnium oxide, lithium aluminate, molybdenum silicide, niobium carbide, niobium nitride, silicon boride, silicon carbide, silicon oxide, silicon nitride, tin oxide, tantalum boride, tantalum carbide, tantalum oxide, tantalum nitride, titanium boride, titanium carbide, titanium oxide, titanium nitride, yttrium oxide, zirconium boride, zirconium carbide, zirconium oxide, and zirconium silicate. Methods of forming the ceramic adhesive and of repairing a substrate in a vacuum and microgravity environment are also disclosed, as is a substrate repaired with the ceramic adhesive.

Abstract: An unsintered LTCC layer stack and a method of producing a sintered LTCC layer stack is described. In various embodiments, the unsintered LTCC layer stack includes a plurality of green ceramic layers which are stacked on top of one another and of which at least one first green layer contains zirconium oxide as the main constituent and an admixture of at least one sintering aid. In various embodiments, a process for producing a sintered LTCC layer stack includes producing an unsintered LTCC layer stack within an embodiment and sintering the unsintered LTCC layer stack.

Abstract: There is provided a method of manufacturing a multilayer ceramic substrate, the method including: providing a non-sintered multilayer ceramic substrate having a plurality of low temperature sintering green sheets laminated therein; disposing a hard-to-sinter constraining green sheet on at least one of top and bottom surfaces of the non-sintered multilayer ceramic substrate; sintering the non-sintered multilayer ceramic substrate having the hard-to-sinter constraining layer disposed thereon; immersing the sintered multilayer ceramic substrate into an acidic solution; and activating a contact between the hard-to-sinter constraining layer and the acidic solution such that the hard-to-sinter constraining layer is removed.

Abstract: An acoustic mirror of alternately arranged layers of high and low acoustic impedances is manufactured in that a basic material having a first layer of the layer sequence is initially provided, on which a second layer of the layer sequence is created on the first layer such that the second layer of the layer sequence partially covers the first layer. Subsequently, a planarization layer is applied onto the layer sequence, and the planarization layer is removed in an area which in the common layer plane projects laterally beyond the second layer so as to result in a residual planarization layer. Finally, a termination layer is applied onto the layer sequence and the residual planarization layer.

Abstract: A production method of a dielectric ceramic composition at least including a main component including a dielectric oxide having perovskite-type crystal structure expressed by a formula ABO3 (note that in the formula, “A” indicates one or more elements selected from Ba, Ca, Sr and Mg, and that “B” indicates one or more elements selected from Ti, Zr and Hf) comprises steps of preparing a main component material including said dielectric oxide expressed by ABO3; preparing a subcomponent material including a composite oxide expressed by M4R6O(SiO4)6 (note that “M” indicates at least one selected from Ca and Sr, and that “R” indicates at least one selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu); mixing said main component material and subcomponent material to obtain a dielectric ceramic composition material; and firing said dielectric ceramic composition material.

Abstract: In the manufacture of a multilayer ceramic substrate including a ceramic laminate by a so-called non-shrink process in which the ceramic laminate disposed between shrinkage control layers is fired, first and second surface conductive films formed on first and second main surfaces of the ceramic laminate may cause warping of the multilayer ceramic substrate after the shrinkage control layers are removed. After the firing step, in removing the shrinkage control layers from a composite laminate, the thickness of at least one of first and second reaction layers formed at interfaces between ceramic green layers and the shrinkage control layers in the firing step is reduced such that the thickness of the first reaction layer is different from the thickness of the second reaction layer, thereby controlling the compressive stress generated by the reaction layers to reduce the warping of the multilayer ceramic substrate.

Abstract: A release layer paste used for producing a multilayer type electronic device and forming a release layer of a thickness of 0.05 to 0.1 ?m, used in combination with an electrode layer paste including one or more solvents selected from limonene, dihydroterpinyl methyl ether, ?-terpinyl acetate, terpinyl methyl ether, isobornyl acetate, caryophyllene, 1-dihydrocarvyl acetate, menthone, menthyl acetate, perillyl acetate, carvyl acetate, d-dihydrocarvyl acetate, and butyl carbitol acetate and a binder comprised of ethyl cellulose, including a ceramic powder, organic vehicle, plasticizer, and dispersion agent, the organic vehicle containing a binder having polyvinyl acetal as its main ingredient, a ratio (P/B) of the ceramic powder with respect to the binder and plasticizer being controlled to 1.33 to 5.56 (however, excluding 5.56).

Abstract: A method of bonding an insulation layer (26) to a CMC layer (22) by applying a compliant joining layer (24) between them in a series of steps (52-70) effective to bond the layers (22, 24, 26) with reduced differential shrinkage stresses during firing and reduced residual stresses. The CMC layer (22) and the compliant layer (24) may each be fired to an intermediate stage prior to applying the next layer (24 and 26 respectively), such that the compliant layer (24) has a remaining amount of curing shrinkage between that of the CMC layer (22) and the insulating layer (26) during a final firing stage. The insulation layer (26) may be a friable graded insulation (26F) cast as a composite of hollow ceramic spheres (26S) in a ceramic matrix (26M). The compliant layer (24) may form a checkerboard of cracks (72) oriented generally perpendicular to the layer surface that function to relax stress.

Abstract: A thin film magnetic recording head is fabricated by forming a substrate from opposing ferrite blocks which have a ceramic member bonded between them. This structure is then diced to form a plurality of columns, wherein each column has a ferrite/ceramic combination. Each column represents a single channel in the completed head. A block of ceramic is then cut to match the columned structure and the two are bonded together. The bonded structure is then cut or ground until a head is formed, having ceramic disposed between each channel. A ferrite back-gap is then added to each channel, minimizing the reluctance of the flux path. The thin film is patterned on the head to optimize various channel configurations.

Abstract: An assembly for forming a hollow, ceramic arc discharge vessel for high-intensity discharge (HID) lamps is described wherein a means for self-alignment of two molded sections is provided. In particular, the sealing surface of one section of the arc discharge vessel is provided with a convex surface and the sealing surface of the other section is provided with a concave surface. The radius of the convex sealing surface is smaller than the radius of the concave sealing surface so that the sections may self-align during joining, preferably without gas entrapment in the seal.

Abstract: A green sheet slurry, characterized by including ceramic powder, a binder resin, a plasticizer and a solvent, wherein the binder resin contains a polyvinyl butyral resin, a polymerization degree of the polybutyral resin is 1000 or more and 1700 or less, a nominal value of a butyralation degree of the resin is 65% or higher and 78% or lower, and a residual acetyl group amount is smaller than 6%.

Abstract: A precursor of a ceramic adhesive suitable for use in a vacuum, thermal, and microgravity environment. The precursor of the ceramic adhesive includes a silicon-based, preceramic polymer and at least one ceramic powder selected from the group consisting of aluminum oxide, aluminum nitride, boron carbide, boron oxide, boron nitride, hafnium boride, hafnium carbide, hafnium oxide, lithium aluminate, molybdenum silicide, niobium carbide, niobium nitride, silicon boride, silicon carbide, silicon oxide, silicon nitride, tin oxide, tantalum boride, tantalum carbide, tantalum oxide, tantalum nitride, titanium boride, titanium carbide, titanium oxide, titanium nitride, yttrium oxide, zirconium diboride, zirconium carbide, zirconium oxide, and zirconium silicate. Methods of forming the ceramic adhesive and of repairing a substrate in a vacuum and microgravity environment are also disclosed, as is a substrate repaired with the ceramic adhesive.

Abstract: A method of fabricating a multilayer ceramic substrate includes stacking one or a plurality of unfired ceramic greensheets on one or both sides of a previously fired ceramic substrate, thereby forming a stack, each unfired ceramic greensheet having a firing temperature substantially equal to or lower than a firing temperature of the previously fired ceramic substrate, stacking a restricting greensheet on the unfired ceramic greensheet composing an outermost layer of the stack, the restricting greensheet having a higher firing temperature than each unfired ceramic greensheet, firing the stack at the firing temperature of the unfired ceramic green sheets with or without pressure applied via the restricting greensheet while the stack is under restriction by the restricting greensheet, thereby integrating the stack, and eliminating remainders of the restricting greensheet after the firing step.

Abstract: A process for manufacturing a ceramic device of the heat exchanger type includes:—shaping ceramic plates (P0-Pp) and machining these ceramic plates in the unprocessed state on at least one face, so as to produce respective flow paths (Z1A, Z1B) for a first and a second fluid,—stacking the unprocessed plates in order to form an assembly having several levels of flow,—a 1st densification heat treatment (sintering) in order to obtain a pre-assembled densified monolithic block,—a 2nd heat treatment in order to provide the seal of the assembly by migration of a meltable phase (brazing material) to the interfaces of the block.

Abstract: A precursor of a ceramic adhesive suitable for use in a vacuum, thermal, and microgravity environment. The precursor of the ceramic adhesive includes a silicon-based, preceramic polymer and at least one ceramic powder selected from the group consisting of aluminum oxide, aluminum nitride, boron carbide, boron oxide, boron nitride, hafnium boride, hafnium carbide, hafnium oxide, lithium aluminate, molybdenum silicide, niobium carbide, niobium nitride, silicon boride, silicon carbide, silicon oxide, silicon nitride, tin oxide, tantalum boride, tantalum carbide, tantalum oxide, tantalum nitride, titanium boride, titanium carbide, titanium oxide, titanium nitride, yttrium oxide, zirconium, diboride, zirconium carbide, zirconium oxide, and zirconium silicate. Methods of forming the ceramic adhesive and of repairing a substrate in a vacuum and microgravity environment are also disclosed, as is a substrate repaired with the ceramic adhesive.

Abstract: A release layer paste used for producing a multilayer electronic device, used in combination with an electrode layer paste including terpineol, dehydroterpineol, terpineol acetate, or dehydroterpineol acetate and including a ceramic powder, organic vehicle, plasticizer, and dispersion agent, the organic vehicle containing a binder having polyvinyl acetal as its main ingredient, a ratio (P/B) of the ceramic powder and the binder and plasticizer being controlled to 1.33 to 5.56 (however, excluding 5.56).

Abstract: A method for manufacturing a multilayer ceramic board prevents damage to a wiring conductor formed on the surface of a multilayer ceramic board fabricated via a non-contraction process. On at least one principal surface of a layered body made up of a plurality of board ceramic green sheets including ceramic material powder, contraction prevention green sheets including inorganic material powder which is not sintered at the baking temperature of the board ceramic green sheet are arranged such that along at least a portion of the outer circumference of the principal surface, the portion and a nearby portion thereof are exposed to form a compound layered body, the compound layered body is baked under a condition in which the ceramic material powder is sintered, and the inorganic material powder is not sintered, following which the contraction prevention green sheets are removed.

Abstract: A process for joining ceramic components, wherein the components which are to be joined consist of sintered nonoxide ceramic, and the components are brought into contact with one another in a diffusion-welding process in the presence of a shielding gas atmosphere and are joined with little deformation, under the application of a temperature of at least 1600° C., preferably over 1800° C., particularly preferably over 2000° C., and if appropriate a load, to form a monolith, the components which are to be joined experiencing plastic deformation in the direction in which force is introduced of less than 5%, preferably less than 1%.

Abstract: A method of bonding at least a first ceramics structure (101) to a second ceramics structure (102), which includes the steps of applying a pressure to the first ceramics structure (101) and the second ceramics structure (102) in such a direction that these structures move close to each other with a bonding material layer (110) interposed between the first ceramics structure (101) and the second ceramics structure (102) (FIG. A), removing a bonding material (111a) extruded from the bonding material layer (110) to an end face of a stacked body including the first ceramics structure (101) and the second ceramics structure (102) by the application of the pressure thereto (FIG. B), drying a bonding material (111b) near the end face of the stacked body (120) after the extruded bonding material (111a) is removed (FIG. C), and drying the entire part of the stacked body (120).