C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
261/11
C03C 10/00 (2006.01) A61K 6/027 (2006.01) A61K 6/06 (2006.01) C03B 19/02 (2006.01) C03B 32/02 (2006.01)
Patent
CA 1212125
Abstract of the Disclosure The instant invention relates to the development of an embedment material suitable for use in heat treating glass castings to convert them into glass- ceramic articles, whereby the shrinkage customarily experienced resulting from densification of the casting during conversion to a glass-ceramic is minimized and sound glass-ceramic articles of tight dimensional tol- erances can be produced. The inventive embedment materials will: (a) contain an inorganic component which is subject to an inversion accompanied with a large change in volume at a temperature below the set point of the glass-ceramic article; (b) demonstrate a coefficient of thermal expansion equal to or no more than about 40x10-7/°C units greater than that exhibited by the glass-ceramic article; (c) display a refractoriness sufficient to resist thermal deformation and slumping and be resistant to a phase change at the temperature employed to convert the class casting to a glass-ceramic article; and (d) be inert to the glass and glass-ceramic. One particularly suitable investment consists essentially, by weight, of 5-30% plaster of Paris and 70-95% leucite.
447711
Adair Peter J.
Hobczuk Michael P.
Kingsbury Paul I.
Nelson John W.
Corning Glass Works
Gowling Lafleur Henderson Llp
LandOfFree
Embedding material useful in preparing glass-ceramic products does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Embedding material useful in preparing glass-ceramic products, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Embedding material useful in preparing glass-ceramic products will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1325068