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Patent Searching and Data


Title:
INFRARED ABSORBING GLASS FOR REED SWITCH
Document Type and Number:
WIPO Patent Application WO/2001/016042
Kind Code:
A1
Abstract:
An infrared absorbing glass for a reed switch which has a transmittance for an infrared ray having a wavelength of 1050 nm of 10 % or less at a thickness of 0.5 mm and has a chlorine content of 150 ppm or less. It is preferred that the glass has a coefficient of thermal linear expansion of 85 to 100 x 10?-7¿/°C in the temperature range of 30 to 380 °C. It is more preferred that the glass has the following composition: SiO¿2? 60 to 75 %, Al¿2?O¿3? 1 to 10 %, B¿2?O¿3? 0 to 10 %, RO 3.5 to 10 % (R is one or more elements selected from the group consisting of Ca, Mg, Ba, Sr, Zn), Li¿2?O 0.5 to 5 %, (Na¿2?O + K¿2?O) 8 to 17 %, Fe¿3?O¿4? 2 to 10 %, all percentages being based on the weight of the glass. This infrared absorbing glass can be suitably used for sealing a reed switch which uses a magnetic wire rod made from a Fe-Ni alloy (52 alloy).

Inventors:
HASHIMOTO KOICHI (JP)
KOSOKABE HIROYUKI (JP)
Application Number:
PCT/JP1999/004685
Publication Date:
March 08, 2001
Filing Date:
August 30, 1999
Export Citation:
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Assignee:
NIPPON ELECTRIC GLASS CO (JP)
HASHIMOTO KOICHI (JP)
KOSOKABE HIROYUKI (JP)
International Classes:
C03C3/087; C03C3/083; C03C3/085; C03C3/091; C03C3/093; C03C4/08; H01H11/00; H01H36/00; (IPC1-7): C03C4/08; C03C3/091; C03C3/093; H01H36/00
Foreign References:
US4277285A1981-07-07
JPH04310537A1992-11-02
JPS5050417A1975-05-06
Other References:
See also references of EP 1153895A4
Attorney, Agent or Firm:
Goto, Yosuke (Nishishinbashi 1-chome Minato-ku, Tokyo, JP)
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