Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1982-01-07
1983-11-22
Sever, Frank
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156617SP, 156619, 156DIG61, 156DIG64, 156DIG73, B01J 1718
Patent
active
044167237
ABSTRACT:
During the process of pulling sapphire tubes from a melt with the aid of a seed, the longitudinal temperature gradient in the zone between the solidified front and the region of pulling where the temperature is between 1850 and 1900 deg. C. is maintained not in excess of 30 deg. C./cm. The tube so grown is annealed at a temperature between 1950 and 2000 deg. C. by increasing the temperature at a rate of 30 to 40 deg. C./min and keeping the tube at said temperature during a period between 3 and 4 hours. After that the tube is cooled down to room temperature at a rate of 30-40 deg. C./min.
Disclosed is also an apparatus which enables said temperature gradient to be maintained while pulling the tube.
REFERENCES:
patent: 3953174 (1976-04-01), LaBelle
patent: 4184907 (1980-01-01), Yates
Abramian Grant I.
Azoian Stepan E.
Chaikin Peter M.
Chalian Eduard A.
Egorov Leonid P.
LandOfFree
Method for producing sapphire tubes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing sapphire tubes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing sapphire tubes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1813664