摘要:
Compositions containing getter material and getter devices for which gettering activity can be activated at applied temperatures that are lower than those temperatures required for activating the getter material alone are disclosed. In one aspect, a getter composition that includes a getter component and an activator component is provided. The getter component is selected from the group consisting of evaporable and non-evaporable getter materials. The activator component is effective to heat said getter material to a temperature greater than about 500.degree. C. when said activator material is heated to a temperature of between about 280.degree. C. and about 500.degree. C. In some embodiments, the activator component is effective to bring the temperature of the getter material to greater than about 1,000.degree. C. These materials can be used in devices and locations for which low applied activation temperatures are required.
摘要:
A process for producing a field emitter flat display includes providing a supported porous layer of a non-evaporable getter material by depositing the non-evaporable getter material on a substrate followed by sintering the deposited material. The substrate having the porous layer of non-evaporable getter material thereon is then housed in an inner space defined by opposing plates. The inner space is then evacuated and hermetically sealed. The non-evaporable getter material is preferably deposited by preparing a suspension of non-evaporable getter material particles in a suspending medium, coating a surface of a substrate with the suspension by, e.g., spraying, and sintering the coating.
摘要:
A mercury-dispensing device is disclosed that includes a mercury dispenser having the formula Ti.sub.x Zr.sub.y Hg.sub.z in which x and y are between 0 and 13, inclusive, the quantity x+y is between 3 and 13, inclusive, and z is 1 or 2; and a promoter that comprises copper, silicon and possibly a third metal selected among the transition elements. A getter material selected among titanium, zirconium, tantalum, niobium, vanadium and mixtures thereof, and alloys of these metals with nickel, iron or aluminum can be included in the device. The mercury dispense, promoter and optional getter material are provided preferably in the form of powders compressed as a pellet, or contained in a ring-shaped metallic support or rolled on the surfaces of a metallic strip. Also disclosed is a process for introducing mercury into electron tubes by making use of the above-mentioned mercury-dispensing devices.
摘要:
A getter material is provided which efficiently sorbs gases at low pressures but, when a system failure causes high pressures of hydrogen and oxygen (air) to be present, does not increase its temperature to that which would cause explosive ignition of the hydrogen-oxygen (air) mixture.
摘要:
A thermally insulating jacket under reversible vacuum, having an inner wall, an outer wall and an hollow space between these walls. The hollow space is in fluid communication with an outer housing containing a reversible non-evaporable hydrogen getter loaded with hydrogen. The reversible hydrogen getter has a certain hydrogen equilibrium pressure. The hollow space contains a non-evaporable promoter getter having a certain hydrogen equilibrium pressure. These jackets can be employed with heat accumulators, batteries, cryogenic vessels, cryogenic pipes, catalytic silencers and solar panels.
摘要:
A getter material is provided which efficiently sorbs gases at low pressures but, when a system failure causes high pressures of hydrogen and oxygen (air) to be present, does not increase its temperature to that which would cause explosive ignition of the hydrogen-oxygen (air) mixture.
摘要:
There is described a process for the recovery of deuterium and tritium from their oxides, such has heavy water and tritiated water, comprising the steps of reacting the oxides of deuterium and tritium with an intermetallic compound having a formula ZrM.sub.2, where M is a transition metal chosen from the group comprising Cr, Mn, Fe, Co and Ni such that it sorbs oxygen and released deuterium and tritium. The reaction preferably occurs by contacting the impure gas with the ZrM.sub.2 alloy as defined above, in the form of a compressed powder. A preferred alloy is the intermetallic ternary compound ZrMnFe.
摘要:
A high-pressure discharge lamp has an outer envelope (1) in which a discharge vessel (11) is arranged enclosing a discharge space (13) with an ionizable filling. The discharge vessel has two mutually opposed neck-shaped portions (2, 3) through which current supply conductors (4, 5) extend to a pair of electrodes (6, 7) in the discharge space. A lamp base (8) of electrically insulating material supports the discharge vessel. The lamp base also supports the outer envelope. The outer envelope with a volume equal to or less than 2 cc encloses the current supply conductors and is connected to the lamp base in a gas-tight manner. A getter (10) is provided in the outer envelope for pumping out residual nitrogen from the outer envelope after sealing off the discharge lamp prior to operation of the discharge lamp, the getter (10) comprising at least 2.5 mbar.ml nitrogen. Preferably, the getter comprises an alloy of zirconium and aluminum or of zirconium and cobalt.
摘要:
A getter comprising a calcium-aluminum compound including about 39% to about 43% calcium by weight produces a calcium vapor when sufficiently heated. The calcium vapor can condense to form a calcium film on an inside surface of a sealed evacuated enclosure such as a CRT to getter reactive species from the enclosed volume. The calcium-aluminum compound, preferably CaAl2 powder, can be mixed with either nickel powder, titanium powder, or both.
摘要:
A combination of getter materials particularly suitable to maintain vacuum in devices which cannot be heated at temperatures higher than about 200° C. The getter comprises: a mixture MO/Pd between an oxide of a transition metal MO chosen among cobalt oxide, copper oxide or their combinations and metallic palladium, wherein the latter is present up to about 2% by weight; and a moisture sorbing material. In some applications it is possible to add to this combination a barium- and lithium-based alloy, preferably BaLi4. Getter devices for containing such a combination are also described.