摘要:
A spark plug for igniting fuel/air mixtures in internal combustion engines, in particular in internal combustion engines of motor vehicles. On its insulating-body foot, the spark plug has a coating which is intended to protect against misfirings and cold-starting difficulties as a consequence of electrically conductive deposits, in particular in the case of installation of spark plugs in new motor vehicles. The coating includes solvent-free silicone rubber or silicone resin. The silicone rubber may contain filler and is provided with silicone oil for the purpose of good processability. Expediently, the inner side of the metal housing which is exposed to the combustion chamber is also covered with the coating. The coating is physiologically safe, environmentally acceptable and resistant to handling, and does not require expensive extraction systems if it is sprayed onto the appropriate region of the spark plug by means of nozzles.
摘要:
A method of planarizing trench-like structures, particularly on semiconductor substrates, by filling in the trench-like structures. For this purpose, a pre-polymer is selectively filled into the trench-like structures, is hardened and is then expanded.
摘要:
A valve has a plurality of material inlet ports, a flushing inlet port, and an outlet port each connected to a respective supply of one of last two different liquid materials. A movable valve body in the valve has a passage and is shiftable between a plurality of positions in each of which a respective one of the inlet ports is connected to the outlet port via the passage. A controller moves the valve body between the positions such that, after each time the valve body is in a position connecting one of the material inlet ports to the outlet port and material has passed through the passage, the valve body is moved into a position connecting the passage with the flushing inlet port for flushing out the passage.
摘要:
A ceramic layer system including at least two layers having respective ion conductivities which are substantially different includes a substrate layer composed of a ceramic material and having substantially no ion conductivity; and at least one conducting layer positioned adjacent to the substrate layer, containing coated ceramic particles composed of ceramic particles composed of a ceramic material having no substantial ion conductivity which are coated with a material having a substantial ion conductivity so that each conducting layer of the at least one conducting layer has a continuous phase after sintering composed of the material which has a substantial ion conductivity and so that the at least one conducting layer has an ion conductivity effective to conduct ions. A method of producing a gas sensor for detecting small quantities of at least one gas in gas mixtures includes providing a substrate layer composed of ceramic particles composed of a material having substantially no ion conductivity; applying a layer composed of coated ceramic particles onto the substrate layer, the coated ceramic particles being composed of ceramic particles composed of a material that has no substantial ion conductivity coated with a material which has a substantial ion conductivity at the operating temperature of the gas sensor; applying at least one functional layer onto the layer composed of coated ceramic particles to provide a green body; preheating the green body to remove binding agents, plastifying agents, and any additional organic constituents; and sintering the green body after preheating by heating to a temperature effective to sinter the green body so that the layer comprised of coated ceramic particles has a continuous phase comprised of the material which has a substantial ion conductivity.
摘要:
A spark plug having an electrode connected via a terminal stud to an ignition lead and having a resistor arranged between the electrode and the ignition lead, the resistor having increased temperature resistance.
摘要:
To provide a substrate enclosed in a uniform nucleation layer, a substrate is nucleated with a noble metal salt where the noble metal salt is chemically bound to the substrate, and a method is described for binding a noble metal salt chemically to a substrate. To provide a metal plated powder, a powder is nucleated with a noble metal salt and the nucleation is coated with a metal layer. A method is also provided for nucleating the powder surface with a noble metal salt in such a manner that it is chemically bound to the substrate and then metal plated by a conventional electroless method.
摘要:
The invention essentially relates to the use of ceramic powders whose surface has been rendered hydrophobic to produce fine-particle dispersions having a high solids content and a low viscosity. The invention further relates to specific ceramic powders whose surface has been rendered hydrophobic, and methods of producing them. Ceramic powders whose oxidic surface has hydroxide groups possessing a basic or amphoteric character can be rendered hydrophobic, for example, through the effect of a hydrophobic carboxylic acid. Acidic oxides are rendered hydrophobic through treatment with metal-containing hydrophobing agents which are, however, also suitable for rendering ceramic powders hydrophobic that have a basic or amphoteric character.
摘要:
A process for the currentless metallization of electrically non-conductive substrates, includes providing a substrate which is electrically non-conductive; depositing on the substrate a positive lacquer comprising at least one polymer which is UV hardenable, at least one organo-metalllic compound, and a substance which is light-active to provide a positive lacquer coated substrate; irradiating the positive lacquer coated substrate with UV radiation to provide an irradiated coated substrate; and precipitating a metal layer onto the irradiated coated substrate by currentless metallization in a bath effective therefore.
摘要:
A pigment is mixed with an epoxy resin or varnish binder in a weight ratio from 5:1 to 6:1 to make a paste, which is then applied as a thin layer by screen printing on top of the counterelectrode layer previously baked onto a metal substrate. In another baking step the new layer for producing a reflective coating is heated to between 120.degree. and 180.degree. C., in which temperature range the binder produces small bubbles before hardening, so that the layer that is produced is permeable to ions when the layer becomes soaked with electrolyte in the assembled electrochromic device. The metal substrate is shaped by drawing to provide the electrolyte cavity after the application of the counterelectrode and the reflecting background layer thereon, since the deformation does not damage either of these layers.
摘要:
The counterelectrode (16) of an electrochromic indicator device is made of a paste of activated carbon and an organic binder baked on a metal plate (15). The shape of the metal plate can be dished after the layer is baked on without damage. Activated carbon in the counterelectrode, operating with the usual electrolyte and a transition metal oxide electrochromic electrode, makes possible a high-charge density from migration of ions with the application of very small voltages. The electrochromic effect can be extinguished simply by a short-circuit, especially if polyvinyl alcohol is provided as a supplementary binder by dipping the baked counterelectrode therein and baking again, and even more so if the activated carbon paste contains finely divided gold from decomposition of a gold compound during baking. The counterelectrode layer can be applied by screen printing.