Low expansion transparent glass-ceramics, glass-ceramic...

Compositions: ceramic – Ceramic compositions – Devitrified glass-ceramics

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C501S007000

Reexamination Certificate

active

07148164

ABSTRACT:
There are provided low expansion transparent glass-ceramics obtained by heat treating a base glass produced at a relatively low melting temperature of 1530° C. or below. The glass-ceramics have an average linear thermal expansion coefficient within a range from +6×10−7/° C. to +35×10−7/° C., 80% transmittance wavelength (T80) of 700 nm or below, internal transmittance of 75% or over at light wavelength of 1550 nm, heat resisting temperature of 800° C. or over and Young's modulus of 90 GPa or over. The glass-ceramics comprise SiO2, Al2O3, MgO, CaO, BaO, ZnO, Li2O, TiO2and ZrO2and contain β-quartz or β-quartz solid solution as a predominant crystal phase. There are also provided optical waveguide elements and an arrayed waveguide grating (AWG) type planar lightwave circuit utilizing these glass-ceramics.

REFERENCES:
patent: 3681102 (1972-08-01), Beall
patent: 4835121 (1989-05-01), Shibuya et al.
patent: 5017519 (1991-05-01), Morimoto et al.
patent: 5028567 (1991-07-01), Gotoh et al.
patent: 5336643 (1994-08-01), Goto et al.
patent: 5591682 (1997-01-01), Goto
patent: 5968857 (1999-10-01), Pickney
patent: 5972816 (1999-10-01), Goto
patent: 6087280 (2000-07-01), Beall et al.
patent: 6248678 (2001-06-01), Pickney
patent: 2064528 (1970-12-01), None
patent: 0 587 979 (1994-03-01), None
patent: 2715138 (1990-10-01), None
patent: 11-100230 (1999-04-01), None
patent: 11-100231 (1999-04-01), None
patent: 2000-95559 (2000-04-01), None
patent: 2001-348250 (2001-12-01), None
patent: 695979 (1979-11-01), None
patent: 97 26572 (1997-07-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Low expansion transparent glass-ceramics, glass-ceramic... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low expansion transparent glass-ceramics, glass-ceramic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low expansion transparent glass-ceramics, glass-ceramic... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3719053

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.