EP 1248285 B1 20071010 - Low pressure discharge lamp and reducing agent for such a lamp
Title (en)
Low pressure discharge lamp and reducing agent for such a lamp
Title (de)
Niederdruckentladungslampe und Reduktionsmittel für eine solche Lampe
Title (fr)
Lampe à décharge à basse pression et réducteur pour une telle lampe
Publication
Application
Priority
DE 10117365 A 20010406
Abstract (en)
[origin: EP1248285A2] Low-pressure discharge lamp (1) comprises a discharge vessel (2) containing two electrodes (18) and filled with mercury and at least one inert gas. A reducing agent (20) binds oxygen present in the discharge vessel between room temperature and 900 degrees C and reduces mercury oxide. An Independent claim is also included for a reducing agent for the above discharge lamp comprising a substance A containing oxygen at room temperature and a substance B which under discharge conditions and higher temperatures up to 900 degrees C reduces the oxide of substance A and mercury oxide and binds free oxygen. Preferred Features: Substance A is Fe and substance B is or contains Zr. The mixing ratio of Fe:Zr is about 4:1. Substance A contains oxides and substance B is selected so that it reduces these oxides and mercury oxide and stores oxygen. Substance A is a metal or a metal compound forming no amalgam. Substance B is a substance whose oxide has a higher binding energy than the oxide of substance A or mercury oxide.
IPC 8 full level
H01J 61/72 (2006.01); H01J 7/18 (2006.01); H01J 61/26 (2006.01)
CPC (source: EP US)
H01J 7/183 (2013.01 - EP US); H01J 61/26 (2013.01 - EP US); H01J 61/72 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
EP 1248285 A2 20021009; EP 1248285 A3 20060405; EP 1248285 B1 20071010; CA 2380761 A1 20021006; DE 10117365 A1 20021010; DE 50211028 D1 20071122; US 2002175625 A1 20021128
DOCDB simple family (application)
EP 02004682 A 20020228; CA 2380761 A 20020404; DE 10117365 A 20010406; DE 50211028 T 20020228; US 10541002 A 20020326