C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
313/10, 117/100
C04B 35/10 (2006.01)
Patent
CA 1245110
LD 9073 GLAZE POLISHED POLYCRYSTALLINE ALUMINA MATERIAL ABSTRACT OF THE DISCLOSURE Increased optical transmission is provided for a body of optically transparent polycrystalline alumina by coating at least one major surface of said alumina body with a solid glaze coating and subsequently melting said coating at elevated temperatures to dissolve the surface alumina grains in physical content therewith to provide a smoother surface when the coating residue has been removed. More particularly, a solid glaze coating is first deposited on said major surface of the alumina body and the coated alumina body thereafter heated to sufficiently elevated temperatures for the glaze liquification whereupon surface alumina grains in physical contact therewith are dissolved in a manner which reduces the high spots on the individual surface alumina grains without materially introducing low spots at the grain boundaries and wherein the individual alumina surface grains have been preferentially etched in certain of the crystalline axis directions. The present glaze material comprises an alkali metal borate other than lithium borate having an alkali metal oxide to boron oxide weight ratio in the range from about 1:2 up to 1:4 and which is deposited on the major surface of said alumina body as a liquid suspension.
502405
Mcvey Charles I.
Scott Curtis E.
Company General Electric
Eckersley Raymond A.
LandOfFree
Glaze polished polycrystalline alumina material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Glaze polished polycrystalline alumina material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Glaze polished polycrystalline alumina material will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1199247