公开(公告)号：EP1012873A4

公开(公告)日：2009-04-08

申请号：EP98944815

申请日：1998-09-10

申请人： OSRAM SYLVANIA INC ,  SCHOTT AG

发明人： MARLOR RICHARD C ,  NAUMANN KARIN ,  OTT FRANZ ,  BECKER OTTMAR

IPC分类号： C03C3/085 ,  C03C3/093 ,  C03C3/087 ,  C03C3/089 ,  C03C3/091 ,  H01J61/30 ,  H01K1/28 ,  H01K1/32 ,  H01K1/50

CPC分类号： C03C3/093 ,  C03C3/087 ,  C03C3/11 ,  H01J61/302 ,  H01K1/28 ,  H01K1/50 ,  Y02B20/12

摘要： A long life, halogen cycle, incandescent lamp (30) for operation in excess of 85 volts. The lamp comprises a transparent glass envelope (34) having sealed therewithin a tungsten filament (45); a pair of electrical lead-ins (42, 44) connecting the filament and extending exteriorly of the envelope for connection to a supply voltage greater than 100 V; and a fill gas within the envelope, including a halogen, at a pressure of at least three atmospheres. The envelope is constructed of a five component alkaline earth aluminosilicate glass having a composition consisting essentially of, in weight percent from > 58 to about 64 % SiO2, from about 14 to about 17 % Al2O3; from 0 to about 1 % B2O3, from 1 to about 6 % MgO, from about 6 to about 12 % CaO, from about 7 to about 17 % BaO and from 0 to about 1.5 % ZrO2.