Title:
INFRARED ABSORPTION GLASS FOR MAGNETIC REED SWITCH
Document Type and Number:
Japanese Patent JP3902333
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce infrared absorption glass excellent in infrared absorptivity and capable of efficiently being sealed even in heated with the outer edge part of an infrared beam spot by specifying infrared transmissivity at a specific wavelength and by specifying chlorine content in glass.
SOLUTION: This glass has ≤10% infrared transmissivity at 1,050 nm wavelength at 0.5 mm thickness, ≤150 ppm chlorine content, pref. ≤5,000 ppm iron content and importantly (85-100)×10-7/°C coefficient of linear thermal expansion at 30-380°C. The glass pref. contains 60-75 wt.% SiO2, 1-10 wt.% Al2O3, 0-10 wt.% B2O3, 3.5-10 wt.% RO (R is at least one kind selected from the group consisting of Ca, Mg, Ba, Sr and Zn), 0.5-5 wt.% Li2O, 8-17 wt.% (Na2O+K2O) and 2-10 wt.% Fe3O4.
Inventors:
Yukiichi Hashimoto
Hiroyuki Kasogabe
Hiroyuki Kasogabe
Application Number:
JP19503598A
Publication Date:
April 04, 2007
Filing Date:
June 24, 1998
Export Citation:
Assignee:
Nippon Electric Glass Co., Ltd.
International Classes:
C03C3/087; C03C4/08; C03C3/085; C03C3/091; C03C3/093; H01H36/00; H01H11/00; (IPC1-7): C03C4/08; C03C3/087; C03C3/093; H01H36/00
Domestic Patent References:
| JP54035214B1 |
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