Method for producing an electric lamp and foil configuration

A method for producing an electric lamp having a vitreous lamp bulb and a foil of molybdenum or a doped molybdenum alloy which is pinched in the lamp bulb includes post-treating the unfinished foil such that substantially non-contiguous, insular regions of material agglomerates are formed. The material agglomerates are formed of molybdenum, molybdenum alloys, titanium, silicon, an oxide, a mixed oxide and/or an oxidic compound, with a vapor pressure of in each case less than 10 mbar at 2000° C. The substantially non-contiguous, insular regions are formed on at least 5 percent and at most 60 percent of the area of the foil surface. In this way, the adhesive strength between the foil and the glass and therefore also the service life of the lamp are significantly improved.

VERFAHREN ZUR HERSTELLUNG EINER HOCHDRUCK-ENTLADUNGSLAMPE

Production of a high pressure discharge lamp having a quartz glass or SiO2-containing bulb and electrodes made from tungsten or tungsten alloy comprises pre-treating the surface of the electrodes before or during the construction of the lamp so that in the pre-treated region 2-50% of the electrode surface is covered by particles or by island-like agglomerate materials having a different surface structure than the electrode surface and composed of a material composition containing tungsten, rhenium, silicon or their alloys or an oxidic compound having a vapor pressure of less than 5 x 10<-2> bar at 2000 deg C. Preferred Features: The size of the particles and/or agglomerate materials is less than 5 mu m. The particles and agglomerate materials are made from HfO2, ZrO2 or Sc2O3.

Verfahren zur Herstellung einer Hochdruck-Entladungslampe

Die Erfindung betrifft ein Verfahren zur Herstellung einer Hochdruck-Entladungslampe, im Einzelnen zur Oberflächenbehandlung von Wolfram-Elektroden für derartige Lampen, zumindest in den von Glas bzw. Quarz umschlossenen Elektrodenbereichen. Dadurch wird die Glas-Elektroden-Kontaktverbindung verbessert, insbesondere hinsichtlich der durch mechanische Spannungen verursachten Spalte in der Verbindungszone im Glas.

VERFAHREN ZUR HERSTELLUNG EINER ELEKTRISCHEN LAMPE

Production of an electric lamp having a SiO2 glass bulb and a current feed made from a foil of molybdenum or a doped molybdenum alloy comprises post-treating the foil before squeezing into the glass bulb so that on 5-60 % of the foil surface produce non-connecting island regions of material agglomerates. Preferred Features: The material agglomerates consist of yttrium oxide or yttrium mixed oxide, or titanium or titanium mixed oxide.

Folie zur Verwendung in elektrischen Lampen

Production of high pressure discharge lamp comprises pre-treating surface of electrodes before or during construction of lamp so that in pre-treated region part of electrode surface is covered by particles or agglomerate materials

Production of a high pressure discharge lamp having a quartz glass or SiO2-containing bulb and electrodes made from tungsten or tungsten alloy comprises pre-treating the surface of the electrodes before or during the construction of the lamp so that in the pre-treated region 2-50% of the electrode surface is covered by particles or by island-like agglomerate materials having a different surface structure than the electrode surface and composed of a material composition containing tungsten, rhenium, silicon or their alloys or an oxidic compound having a vapor pressure of less than 5 x 10<-2> bar at 2000 deg C. Preferred Features: The size of the particles and/or agglomerate materials is less than 5 mu m. The particles and agglomerate materials are made from HfO2, ZrO2 or Sc2O3.

METHOD FOR PRODUCING ELECTRICAL LAMP

PURPOSE: A method for producing electrical lamp is provided to achieve an improved attachment strength between foil and glass, while lengthening useful life of lamp. CONSTITUTION: An electric lamp includes a SiO2 glass bulb and a current feed unit made from a foil formed of molybdenum or a doped molybdenum alloy. A method for producing the electric lamp comprises the steps of post-treating the foil before being squeezed into the glass bulb so that on 5 to 60 percent of the foil surface produce non-connecting island regions of material agglomerates. The material agglomerates consist of metal foil having a wide variety of surface structures, molybdenum or an alloy thereof, and/or titanium, silicon or oxide, mixed oxide, and/or oxide compound having a vapor pressure lower than 10mbar at a temperature of 2000°C. © KIPO 2002 ...

MANUFACTURING METHOD FOR ELECTRIC LAMP

PROBLEM TO BE SOLVED: To improve the bonding property of a glass electric bulb and foil made of molybdenum sealed in the electric bulb or doped molybdenum alloy to prolong service life of an electric lamp. SOLUTION: Crude foil is post-treated in such a way that a range of coagulated substance like an island having a material composition composed of crude foil and/or molybdenum or its alloy, titanium, silicon or oxide, mixed oxide and/or oxidized compound which is substantially incontinuous on a surface of at least 5% and 60% to the maximum extent of its surface and has various surface structures occurs under a vapor pressure of 10 mb or less at 2000°C, respectively. COPYRIGHT: (C)2002,JPO ...