Abstract: A pressure sensor with a ceramic base body, a measuring membrane connected to the base body forming a measuring chamber, and an electromechanical converter that serves to convert a pressure-related deformation of the measuring membrane into a primary electrical signal. The pressure sensor is characterized by a low thermal measuring error, especially during temperature changes, due to the base body consisting of a ceramic material with high thermal conductivity, especially a thermal conductivity greater than or equal to 50 W/mK.

Abstract: A sintered body comprises a first region which comprises a first material having a first effective coefficient of thermal expansion ?1, a second region which comprises a second material having a second effective coefficient of thermal expansion ?2, a transition region between the first region and the second region in which the effective coefficient of thermal expansion changes from the first effective coefficient of thermal expansion to the second effective coefficient of thermal expansion. The transition region has a sequence of layers with a mixture of at least the first material and the second material, with the mixing ratio of the layers varying in order to achieve a stepwise, in particular monotonic, change in the coefficient of thermal expansion.

Abstract: A composite material includes a polymer matrix and silica gel, which is bound in the polymer matrix. The volume fraction of the silica gel to the volume fraction of the composite material amounts to at least 50%, especially at least 65%. An electronic device, especially measuring device, includes at least one housing having at least one inner space, which contains an electronic circuit, wherein the device has at least one gas path, via which moisture can get into the housing, wherein the device has at least one formed body of the composite material.

Abstract: A pressure measuring cell includes an elastic measuring membrane which is contactable with a first pressure on a first side and with a second pressure on a second side facing away from the first side. The measuring membrane is deflectable as a function of a difference between the first pressure and the second pressure, wherein the measuring membrane pressure-tightly isolates a first volume, which is facing the first side of the measuring membrane, from a second volume, which is facing the second side of the measuring membrane. The pressure measuring cell further includes a transducer for transducing the pressure dependent deflection of the measuring membrane into an electrical or optical signal. The measuring membrane has in the equilibrium state of the measuring membrane compressive stresses at least at the surface of the measuring membrane at least in a radial edge region, in which in the deflected state of the measuring membrane under pressure loading tensile stress maxima occur.

Abstract: An assembly comprising: two ceramic bodies, which are joined by means of a joint of an active hard solder, or braze, wherein the active hard solder, or braze, has a continuous core volume, which is spaced, in each case, from the ceramic bodies by at least 1 ?m, and an average composition CK with a liquidus temperature Tl(CK), wherein the composition CK has a coefficient of thermal expansion ?(CK), wherein ?(CK)=m·?(K), wherein m?1.5, especially m?1.3 and preferably m?1.2, wherein ?(K) is the average coefficient of thermal expansion of the ceramic material of the ceramic bodies, wherein the joint has boundary layers, which border on the ceramic body, wherein at least one of the boundary layers, which lies outside of the core volume, has an average composition CB with a liquidus temperature Tl(CB), which lies not less than 50 K, preferably not less than 100 K, and especially preferably not less than 200 K, under the liquidus temperature Tl(CK) of the average composition CK of the core volume.

Abstract: A method for manufacturing a connection between two ceramic parts comprises: providing a first ceramic part and a second ceramic part; providing an active hard solder, or active braze, on at least one surface section of at least one of the ceramic parts; and heating the active hard solder, or active braze, in a vacuum soldering, brazing process. The entire active hard solder, or active braze, for connecting the first and second ceramic parts is provided in such a manner that at least one surface section of at least one of the ceramic parts, preferably both ceramic parts, is coated by means of gas phase deposition of the alloy of the active hard solder, or active braze.

Abstract: A method for connecting a component to a support via soldering between a first contact surface of the component and a second contact surface of the support. The method is distinguished by features including that at least one spacer is embodied in such a manner and arranged between the first contact surface and the second contact surface that the first contact surface and the second contact surface are spaced from one another, and that the soldering is executed in such a manner that the component and the support are connected with one another via the first contact surface and the second contact surface. Also claimed is a component connectable with a support via soldering is intended.

Abstract: An assembly, comprising: a first ceramic body and a second ceramic body connected by means of a joint of an active hard solder, or braze, wherein the active hard solder, or braze, averaged over a continuous main volume, which includes at least 50% of the volume of the joint, has an average composition CM with a liquidus temperature Tl(CM). An edge region of the joint, which contacts at least one of the ceramic bodies, has an average composition CE with a liquidus temperature Tl(CE), which lies not less than 20 K, preferably not less than 50 K, and especially preferably not less than 100 K above the liquidus temperature Tl(CM) of the average composition CM of the main volume.

Abstract: An assembly, comprising two ceramic bodies, which are connected by means of a joint, which contains an active hard solder, or braze, wherein the active hard solder, or braze, has a continuous core volume, which is spaced from the ceramic bodies, in each case, by at least 1 ?m, especially at least 2 ?m, and wherein the joint has bounding layers, which border on the ceramic body. The the core volume, which includes at least 50% of the volume of the joint, is free of crystalline phases of size greater than 6 ?m, especially greater than 4 ?m, preferably greater than 2 ?m.

Abstract: A capacitive pressure measuring cell, including a ceramic platform and a ceramic measuring membrane, which are connected pressure tightly along a joint to form a reference pressure chamber between them. The measuring membrane has a first electrode facing the platform, and the platform has at least a second electrode facing the measuring membrane. The capacitance between the first and second electrodes depends on the difference between a pressure externally acting on the measuring membrane and a pressure reigning in the reference pressure chamber, wherein the joint has a thickness d, which defines an equilibrium distance between the measuring membrane and the front side of the platform. On the front side of the platform, a support layer is arranged, which comprises an inorganic insulator, wherein the support layer has a thickness of at least 0.2, and wherein the second electrode is arranged on the support layer.

Abstract: A temporal database system, method, and computer-readable storage medium in which a database is provided with sets of entities defined by initial tuples having a set ID, a unique timestamp, and a member increment. A write transaction is performed for sets of entities, wherein the write transaction designates the set by said set ID and produces an increment, wherein the increment is a number of entities to be added to or removed from the designated respective set of entities. New tuples including the set ID, the increment, and a new unique timestamp are created for the write transaction. Following the write transaction, an asynchronous compaction operation is performed on the new tuples. The compaction operation aggregates the increment of each new tuple into summary point counts. The compaction operation facilitates efficient queries without contention with write transactions.

Abstract: A composite material includes a polymer matrix and silica gel, which is bound in the polymer matrix. The volume fraction of the silica gel to the volume fraction of the composite material amounts to at least 50%, especially at least 65%. An electronic device, especially measuring device, includes at least one housing having at least one inner space, which contains an electronic circuit, wherein the device has at least one gas path, via which moisture can get into the housing, wherein the device has at least one formed body of the composite material.

Abstract: A pressure measuring cell includes at least one ceramic measuring membrane body; and at least one ceramic platform, wherein the measuring membrane body is connected with the platform along an annular, peripheral joint. The joint is formed as a welded connection between the measuring membrane body and the platform, wherein the measuring membrane body has a pressure-dependently deformable measuring membrane. A pressure sensor includes a pressure measuring cell and a housing, wherein the pressure measuring cell is held by the housing, and wherein the pressure measuring cell closes a housing opening, through which the pressure measuring cell communicates with an environment of the housing. A seal is clamped between a sealing surface surrounding the opening of the housing and a sealing surface of the pressure measuring cell.

Abstract: A method for manufacturing a pressure sensor, comprising: providing a ceramic platform, a ceramic measuring membrane, and an intermediate ring; providing an active braze material by means of gas phase deposition at least on a first surface section of a first surface and on a second surface section of a second surface. The first surface is a platform surface, which is to be connected with the intermediate ring by means of the active hard solder, or braze, or a surface of the intermediate ring, which is to be connected with the platform by means of the active hard solder, or braze. The second surface is a measuring membrane surface, which is to be connected with the intermediate ring by means of the active hard solder, or braze, or a surface of the intermediate ring, which is to be connected with the measuring membrane by means of the active hard solder, or braze.

Abstract: A method for manufacturing a connection between two ceramic parts comprises: providing a first ceramic part and a second ceramic part; providing an active hard solder, or active braze, on at least one surface section of at least one of the ceramic parts; and heating the active hard solder, or active braze, in a vacuum soldering, brazing process. The entire active hard solder, or active braze, for connecting the first and second ceramic parts is provided in such a manner that at least one surface section of at least one of the ceramic parts, preferably both ceramic parts, is coated by means of gas phase deposition of the alloy of the active hard solder, or active braze.

Abstract: A composite material comprises a polymer matrix; and zeolite, which is bonded in the polymer matrix; wherein the percent of volume of the zeolite in the volume of the composite material amounts to at least 50%, in particular at least 65%. The polymer matrix can in particular comprise a polymer, which is selected from a group of polymers that consist of fluoroplastics, polyaryletherketones, sulphur-containing polymers and high heat resistant polymers. The zeolite comprises in particular a zeolite of type A, in particular a zeolite 4A or 3A.

Abstract: A method for reducing the content of foreign molecules in gaseous or liquid form dissolved in a pressure transfer liquid of a pressure measuring transducer. A pressure receiving chamber is closed by an isolating diaphragm. A pressure measuring chamber is connected to the pressure receiving chamber, and a pressure sensor arranged in the pressure measuring chamber, in which the liquid serves to fill an inner space of the pressure measuring transducer formed by the pressure receiving chamber is provided. The pressure measuring chamber is connected therewith, and transfers an external pressure acting on the isolating diaphragm to the pressure sensor in measurement operation. The liquid is brought into contact with at least one adsorptive body, and foreign molecules dissolved in the liquid are bound to the adsorptive bodies by adsorption.

Abstract: A ceramic product 1 includes a first ceramic part 2 and a second ceramic part 3, wherein the first ceramic part 2 is connected with the second ceramic part 3 via a joint, wherein the joint comprises an active hard solder, or braze, characterized in that the joint has an inhomogeneous distribution of the components of the active hard solder, or braze, wherein at least at an interface between the active hard solder, or braze, and the ceramic, the at least one active component of the active hard solder, or braze, is enriched. For manufacture of the product, the active hard solder, or braze, material is provided in such a manner, that at least one surface section of at least one of the ceramic parts is first coated with at least one active component of the active hard solder, or braze, and that on the coated section, an alloy is provided, which, by melting of the alloy during the heating, alloys with the coating and forms a metal joint between the two ceramic parts.

Abstract: A capacitive pressure measuring cell, including a ceramic platform and a ceramic measuring membrane, which are connected pressure tightly along a joint to form a reference pressure chamber between them. The measuring membrane has a first electrode facing the platform, and the platform has at least a second electrode facing the measuring membrane. The capacitance between the first and second electrodes depends on the difference between a pressure externally acting on the measuring membrane and a pressure reigning in the reference pressure chamber, wherein the joint has a thickness d, which defines an equilibrium distance between the measuring membrane and the front side of the platform. On the front side of the platform, a support layer is arranged, which comprises an inorganic insulator, wherein the support layer has a thickness of at least 0.2, and wherein the second electrode is arranged on the support layer.

Abstract: An elastic ceramic body and a pressure sensor. The elastic ceramic body comprises: a base body of an elastic ceramic material; and a cover layer, which covers at least one section of a surface of the base body, wherein the cover layer is of a material other than that of the base body, and the cover layer comprises microcrystalline Al2O3 (corundum). The cover layer is preferably prepared in a sol gel process. The pressure sensor, comprises: a disk-shaped measuring membrane, which is embodied as an elastic ceramic body according to the above definition; and at least one membrane support body, on which the measuring membrane is connected at its edge region along an encircling joint to form a pressure-tight measuring chamber between the membrane support body and the measuring membrane.