Abstract:
It is described a method for releasing mercury in devices requiring it, in particular fluorescent lamps, based on the use of manganese-mercury compositions.
Abstract:
Compositions for mercury dispensing in lamps are disclosed, comprising a first component comprising mercury and at least a metal selected between titanium and zirconium and a second component consisting of aluminum or either a compound or an alloy including at least 40% by weight of aluminum, wherein the weight ratio between the first and the second component is equal to or lower than 9:1; optionally, the compositions may also include a third component, selected among metals or oxides capable of reacting exothermically with aluminum .
Abstract:
There are disclosed several embodiments of a cathode (11; 20; 30) for cold cathode lamps having the surface at least partially coated with a layer of a getter material (15; 26; 31), which allows to achieve a reduction of the value of the work function of the cathode (11,20,30) and therefore a reduction of the power consumption of the lamp.
Abstract:
Are described non-evaporable getter alloys which can be activated at relatively low temperatures and have good properties in sorbing a wide variety of gases, and particularly hydrogen.
Abstract:
The low-pressure mercury vapor discharge lamp has a light-transmitting discharge vessel (2) enclosing, in a gastight manner, a discharge space (1) provided with a filling of mercury and a rare gas. The discharge vessel comprises discharge means (8) for maintaining a discharge in the discharge space (1). The discharge vessel comprises dispenser means (20) for controllably dispensing hydrogen into the discharge space. The hydrogen gas pressure is in the range between 10-3 Pa and 10 Pa. Preferably, the hydrogen gas pressure is in the range between 10-2 Pa and 1 Pa. A low-pressure mercury vapor discharge lamp with a good maintenance is obtained.
Abstract:
Solutions to improve the properties of the phosphors and electroluminescent devices using phosphors in combination with zeolites for converting UV or Blue radiation into visible radiation.
Abstract:
In a discharge lamp comprising a discharge vessel (1) enclosed with space by an outer bulb (4), a hydrogen getter (6) is used comprising more than 70 % by weight of Y and one or more Y alloys from Al and/or Mn. The getter (6) effectively removes hydrogen from the outer bulb (4).
Abstract:
A process manufacturing devices (21, 21") that carry an active material is described, based on the continuous deposition of a strip of low-melting alloy in the liquid state on a ribbon (1") of a metal net (12) or a micro-perforated and stretched sheet metal (12) , which surface has been previously treated , for example by means of deoxidation, and preferably prepared for the successive cutting in single components or rather devices (21, 21' ) with active material. The deposition can occur by immersion into laminar waver on into a constant jet, by spraying of small drops or by liquid dispensation.
Abstract:
A miniaturized high pressure discharge lamp (20) containing a getter device (22) is described in various embodiments, wherein the getter device is positioned in such a way to minimize or completely suppress the shadow effect with respect to the light emitted by the lamp burner.
Abstract:
It is described the use of non-evaporable getter alloys for hydrogen absorption inside evacuated chambers or from inert gases, both in applications where these latter represent the filling gas of device chambers, and for use in flows of the same gases for their purification. The alloys have the composition of the following polygon when plotted in a ternary diagram: a) Zr 54% - Y 1% - M 45% b) Zr 50% - Y 5% - M 45% O Zr 50% - Y 20% - M 30% d) Zr 75% - Y 20% - M 5% e) Zr 80% - Y 15% - M 5% f ) Zr 80% - Y 1% - M19%.