摘要:
The invention relates to a device for fixing and/or attaching an electronic component such as a semiconductor element (1), and the electroconductive connection thereof to strip conductors, to a carrier (2), by means of a fixing element or a fixing means (3). The fixing element or means (3) is designed such that it maintains its fixing properties at operating temperatures of up to at least 500°C, and the electronic component is placed on the carrier (2) by means of a paste (3) containing Ag, and fixed or rigidly connected to said carrier. The paste (3) preferably comprises a glass part of between 5 vol % and 25 vol %, especially between 10 vol % and 15 vol %, in relation to the solid part, which melts at a baking temperature of approx. ≤ 600 °C, and wets the surface of the carrier at certain points, thereby creating adhesion points to which the sintered metal, such as Ag, adheres or sticks.
摘要:
Disclosed is a method for determining the boiling point of a liquid medium, particularly brake fluid, hydraulic oil or a liquid in pressure transmission devices, wherein the liquid medium is locally heated on a surface area (14) or a sensor element (10) up to the boiling point thereof and the temperature of the surface area (14) is detected. A regulating, substantially constant temperature of the surface area (14) as heat increases is detected as the boiling temperature for the liquid medium.
摘要:
In order to provide a substrate enveloped by a uniform nucleation layer, a substrate seeded with a precious metal salt chemically bound to the substrate is disclosed, as well as a process to chemically bind the precious metal salt to a substrate and to provide a metallised powder. A powder is seeded with a precious metal salt and the nucleated region is coated with a metal layer. The surface of the powder is seeded with a precious metal salt in such a way that the latter is chemically bound to the substrate, and then currentless metallised in a manner known per se.
摘要:
The present invention provides a process for producing an electrode (12) for an electrochemical energy storage means, especially for a lithium ion battery (10), comprising the process steps of: a) providing a mixture of starting materials for formation of a lithium titanate; b) calcining the mixture of starting materials to form a lithium titanate; c) adding a component comprising sulphur and optionally lithium to the mixture of starting materials to form a lithium titanate before and/or after the calcining, and/or d) adding a pore former to the mixture of starting materials to form a lithium titanate before and/or after the calcining; e) sintering the calcined product; and f) optionally removing the pore former from the calcined and optionally sintered product. Such a process makes it possible to produce electrodes having a particularly defined pore structure, which enables a particularly good capacity stable over a long period. The invention further provides an electrode for use in a lithium ion battery and a lithium ion battery.
摘要:
The invention relates to a sensor element for gas sensors for determining the gas constituents of a gas mixture, especially in exhaust gases of internal combustion engines. Said sensor element comprises at least one electrochemical measuring cell and at least one porous layer (24) that is exposed to the gas mixture. Said porous layer (24) contains palladium, platinum, ruthenium, an alkali metal and/or an alkaline earth metal, platinum being contained in the porous layer (24) in a minimum concentration of 1.5 % by weight. The invention also relates to a method and an impregnating solution for producing the sensor element.
摘要:
The invention relates to a method for producing a ceramic green body, in particular a ceramic green sheet, containing a ceramic powder component as the principal ingredient and at least one organic, solvent-free component as the secondary ingredient. In said method, the ceramic powder component is processed together with the organic components into a viscous, solvent-free starting material. This starting material is then formed into the green body or green sheet, using an extruder.
摘要:
The invention relates to a passive high-temperature resistant resistance element for measuring temperature consisting of an insulation layer (9; 10), which is essentially located in the interior, and of two conductive layers (8), which are located on the exterior and which are comprised of a ceramic composite structure. The conductive layers are interconnected at the tip (11) of the resistance element, and the ceramic composite structure comprises trisilicon tetranitride, a metal silicide and yttrium oxide or trisilicon tetranitride, a metal silicide and a matrix phase consisting of SixOyCzNw, whereby x represents 1-2, y represents 0-2, z represents 0-2 and w represents 0-2. The invention also relates to a combination element (3) consisting of said resistance element and of, for example, a pencil-type glow plug.
摘要:
The invention concerns composites with at least two layers which consist of different inorganic ceramic compounds and are produced by sintering together different finely particulate inorganic materials disposed in layers. The composites are characterized in that at least two adjacent layers consist of a dense compound largely free of macropores. The layers are bonded together permanently at the compound interface(s) by virtue of the fact that particles of the different materials are sintered together. The composites and the methods of producing them are suitable for use, for example, in the manufacture of gas sensors.
摘要:
The invention relates to a travelling wave motor with a stator having an electrically excitable piezo-ceramic with which a rotor can be brought into frictional contact. The stator (24) consists of two interconnected piezo-ceramic layers (62, 64) which can be excited via a contacting layer (66, 68) having a circuit arrangement (84, 86).