摘要:
A ceramic circuit board comprising: a ceramic substrate and a metal circuit plate bonded to said ceramic substrate through a brazing material layer; wherein said brazing material layer is composed of Al and an alkaline earth metal element or compound thereof and the amount of Al and an alkaline earth metal element or compound thereof contained in the brazing material layer is 12 wt% or less.
摘要:
There is provided a honeycomb structured body having improved durability in a honeycomb structure body obtained by unitarily bonding a plurality of honeycomb segments. There is provided a honeycomb structure body 1 including a plurality of honeycomb segments 12 each having an outer wall 7, partition walls 2 disposed in the outer wall 7, and a plurality of cells 3 separated from each other by the partition walls 2 and extending in an axial direction, a bonding layer 8 interposed between the plurality of honeycomb segments 12 to unitarily bond the honeycomb segments 12, and an intermediate layer 9 interposed between the bonding layer 8 and the honeycomb segments 9. In the honeycomb structure body 1, pores having a diameter of 0.5 µm or more of the intermediate layer 9 occupies 25% by volume or less of the whole volume of the intermediate layer 9.
摘要:
In a honeycomb structure made of a honeycomb block including a plurality of honeycomb units joined to each other across a seal layer laid between adjacent ones and each of which is formed from a plurality of cells laid longitudinally side by side and cell walls each separating the adjacent cells from each other, or in a honeycomb structure made of a honeycomb monolith including a plurality of cells disposed longitudinally side by side and cell walls each separating the adjacent cells from each other and a seal layer provided over the outer surface of the honeycomb monolith, the seal layer has a color of 60 or more in CIE (1976) psychometric lightness (L*).
摘要:
Reactive foils and their uses are provided as localized heat sources useful, for example, in ignition, joining and propulsion. An improved reactive foil (14) is preferably a freestanding multilayered foil structure made up of alternating layers (16, 18) selected from materials that will react with one another in an exothermic and self-propagating reaction. Upon reacting, this foil supplies highly localized heat energy that may be applied, for example, to joining layers, or directly to bulk materials that are to be joined. This foil heat-source allows rapid bonding to occur at room temperature in virtually an environment (e.g., air, vacuum, water, etc.). If a joining material is used, the foil reaction will supply enough heat to melt the joining materials. If no joining material is used, the foil reaction supplies heat directly to at least two bulk materials, melting a portion of each bulk, which upon cooling, form a strong bond. Additionally, the foil (14) may be designed with openings that allow extrusion of the joining (or bulk) material through the foil to enhance bonding.
摘要:
A microchannel plate (MCP) (50) and a dielectric insulator (80) are deposited with a thin film (54, 84) using a suitable metal selected for optimum diffusion. The metallized MCP (50) and dielectric insulator (80) are then aligned and placed in a bonding fixture (36) that provides the necessary force applied to the components to initiate a diffusion bond. The bonding fixture (36) is then placed in a vacuum heat chamber to accelerate the diffusion bonding process between the MCP (50) and the dielectric insulator (80).
摘要:
The present invention provides a ceramic circuit board comprising: a ceramic substrate and a metal circuit plate bonded to the ceramic substrate through a brazing material layer; wherein the brazing material layer is composed of Al-Si group brazing material and an amount of Si contained in the brazing material is 7 wt% or less. In addition, it is preferable to form a thinned portion, holes, or grooves to outer peripheral portion of the metal circuit plate. According to the above structure of the present invention, there can be provided a ceramic circuit board having both high bonding strength and high heat-cycle resistance, and capable of increasing an operating reliability as electronic device.
摘要:
A wafer holder for a semiconductor manufacturing apparatus that has a high heat conductivity and includes a conductive layer such as heater circuit pattern which can be formed with a high precision pattern, a method of manufacturing the wafer holder, and a semiconductor manufacturing apparatus having therein the wafer holder are provided. On a surface of a sintered aluminum nitride piece (10a), paste containing metal particles is applied and fired to form a heater circuit pattern (11) as a conductive layer. Between the surface of the sintered aluminum nitride piece (10a) having the heater circuit pattern (11) formed thereon and another sintered aluminum nitride piece (10b), a glass layer (14) is provided as a joint layer to be heated for joining the sintered aluminum nitride pieces (10a and 10b) together.
摘要:
A filter for purifying exhaust gas comprising an assembly of plural united ceramic members each having a plurality of through-holes arranged side by side along a longitudinal direction, in which end faces at either side of these through-holes are closed in a checkered pattern so as to have a reverse relation of open end close between gas inlet side and gas outlet side and adjacent through-holes are permeable to each other through porous partition walls, characterized in that each ceramic member has a prismatic shape, and the plural ceramic members are integrally adhered by interposing a sealing member.
摘要:
The object is to provide a laminated radiation member and a power semiconductor apparatus in which no cracks occur due to thermal stress caused by cooling and thermal cycle and which are low in thermal resistance. This is attained by a laminated radiation member comprising a radiation plate, an insulation substrate bonded to the upper surface of the radiation plate and an electrode provided on the upper surface of the insulation substrate, which can be made by a method including a step of, if necessary, previously surface treating a bonding surface of the radiation plate and/or the insulation substrate to assure wettability with a hard solder or a metal, a step of interposing ceramic particles previously surface treated to assure wettability with a hard solder or a metal between the radiation plate and the insulation substrate, a step of disposing a hard solder above and/or below the ceramic particles, a step of heating the hard solder to a temperature higher than the melting point of the solder to melt the solder, a step of penetrating the molten hard solder into spaces between the ceramic particles to react the ceramic particles with the solder to produce a metal base composite material, and a step of bonding the radiation plate and the insulation substrate with the metal base composite material.