Light transmitting calcium phosphate glass-ceramics

Details Light transmitting calcium phosphate glass-ceramics Light transmitting calcium phosphate glass-ceramics

1987-12-22

1989-04-11

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

501 5, 501 10, 501 32, 501 63, 501 73, 501 77, 501 78, C03C 1002, C03C 1006

Patent

active

048206601

ABSTRACT:
A transparent, semitransparent or opaline glass-ceramics containing calcium phosphate crystals uniform and very fine in grain size is obtained by heat-treating a glass essentially comosed of 38-52 wt % of SiO.sub.2, 4-16 wt % of P.sub.2 O.sub.5, 6-18 wt % of Al.sub.2 O.sub.3 (may partly be replaced by La.sub.2 O.sub.3), 20-33 wt % of CaO (may partly be replaced by MgO, BaO,SrO and/or ZnO), 4-17 wt % of ZrO.sub.2 (may partly be replaced by TiO.sub.2) and 0-0.5 wt % of alkali metal oxide(s), wherein the molar ratio of P hd 2O.sub.5 to ZrO.sub.2 is not greater than 3:1, at a temperature above the transition temperature and below the softening temperature of the glass. This glass-ceramics is excellent in refractoriness, electrical insulation resistance, chemical resistance and mechanical strength and has a relatively high coefficient of thermal expansion.

REFERENCES:
patent: 4366253 (1982-12-01), Yagi
patent: 4560666 (1985-12-01), Yoshida
patent: 4643982 (1987-02-01), Kasaga et al.

Affiliated with

Also associated with

Rating

Light transmitting calcium phosphate glass-ceramics does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-667113