摘要:
A getter system (20) is described for the sorption of organic molecules at the inside of active systems (30) for the transdermal release of drugs, suitable to avoid the corrosion of electrical parts of these systems being caused by these organic molecules in the presence of water.
摘要:
A fumes treatment system is provided for exhaust gases of internal combustion engines, for example. The system includes a housing inside which a series of elements are provided for intercepting the flow of fumes. The elements are such that they do not completely take up the internal cross-section of the housing and are provided with or leave such discontinuities as to create a tortuous path for the fumes to be treated.
摘要:
Getter multilayer structures are disclosed, embodiments of which include at least a layer of a non-evaporable getter alloy having a low activation temperature over a layer of a different non-evaporable getter material having high specific surface area, both preferably obtained by cathodic deposition. The multilayer NEG structures exhibit better gas sorbing characteristics and lower activation temperature lower than those of deposits made up of a single material. A process for manufacturing such structures includes depositing a first, high surface area NEG film on a support, and then depositing a thin over layer of low activation NEG film.
摘要:
A process is provided for the formation of miniaturized getter deposits, comprising the steps of forming a layer of a photosensitive polymeric material on a support; selectively exposing the polymeric layer in order to cause a chemical modification in a portion of the polymeric layer; removing with a first solvent only one of the previously exposed or the not previously exposed portions of the polymeric layer, thus forming cavities in the polymeric layer; forming a thin layer of a getter material by cathodic deposition at the bottom of the cavity and on the residual polymer; and removing with a second solvent the polymer portion not removed by the first solvent, leaving at least a getter material deposit on the support surface.
摘要:
A surface acoustic wave gas sensor, in particular a vacuum or hydrogen sensor, includes a piezoelectric substrate (1) on which at least one layer of a gas-sensitive material (6) is arranged between two inter-digital transducers (2, 3). The gas-sensitive material includes a getter material, such that the molecules sorbed by this getter material can vary the frequency of a signal transmitted between the two transducers (2, 3). A process for manufacturing this sensor is also provided using a mask to deposit the gas-sensitive material between the transducers, preferably by sputtering.
摘要:
Compositions are disclosed comprising mercury, titanium, copper and one or more of tin, chromium and silicon, useful for the release of mercury in applications requiring the same, in particular in fluorescent lamps. A process for the preparation of these compositions is also disclosed.
摘要:
A method for removing oxygen from ammonia at low temperature is described. In one embodiment, oxygen contaminated ammonia is contacted with a getter material that includes iron and manganese that sorbs oxygen to yield ammonia that is substantially oxygen free. In one embodiment, the process of contacting ammonia with the getter material takes place at about 25° C. In another embodiment the weight ratio between iron and manganese is about 7:1. In another embodiment, the getter material is dispersed on an inert support of specific surface greater than 100 m2/g. In one embodiment, impure ammonia is contacted with getter material including iron and manganese that sorbs oxygen and with a drying agent that absorbs water to yield deoxygenated anhydrous ammonia. In yet another embodiment, an apparatus consisting of a gas inlet, gas purification chamber and gas outlet that deoxygenates ammonia when charged with getter material that includes iron and manganese is described. In one embodiment, getter material and drying agent are mixed together inside the gas purification chamber. In another aspect a method for producing semiconductor devices with high purity ammonia is described.
摘要:
A portable apparatus for measuring the internal pressure of a vacuum panel is described, includes a measuring head having an cavity wherein a sensor of movement is arranged; the device, supported on a portion of the envelope of the panel, detects the movement of a part of the portion of the envelope facing the cavity, following the evacuation of the space formed by said cavity and the part of envelope.
摘要:
An assembly (10; 20; 30) is formed of at least one support (11; 21; 31) with a deposit (13; 22; 33) of a getter material, to be used as back support of electroluminescent organic screens (known as OLEDs). The assembly provides provisional protection from atmospheric gases for the getter deposit until it is used in the screen. From the assembly is easily obtained a back support for OLEDs already having the getter deposit at the moment of use in the manufacture of these screens.