Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1992-01-31
1994-04-26
Chaudhuri, Olik
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
1566171, 156DIG83, 422248, B01D 900
Patent
active
053063880
ABSTRACT:
A quartz glass crucible for pulling a single crystal, which comprises a cylindrical straight wall portion, a bottom wall portion and a curved intermediate wall portion connecting the straight portion and the bottom portion. The straight portion has an opaque area positioned within about 75% or less of the total height of the crucible, measured from the upper open end of the crucible. The opaque area in the straight portion has a total bubble volume which ranges from about 7.times.10.sup.-3 cm.sup.3 /cm.sup.3 to 30.times.10.sup.-3 cm.sup.3 /cm.sup.3. The remaining straight portion, the curved intermediate portion and the bottom portion consist of transparent material having a total volume of bubbles of about 4.times.10.sup.-3 cm.sup.3 /cm.sup.3 or less.
REFERENCES:
patent: 4416680 (1983-11-01), Bruening et al.
patent: 4528163 (1985-07-01), Albrecht
patent: 4632686 (1986-12-01), Brown et al.
patent: 4935046 (1990-06-01), Uchikawa et al.
patent: 4956208 (1990-09-01), Uchikawa et al.
Ito Tohru
Nagamine Yoshinobu
Nakajima Toshio
Chaudhuri Olik
Garrett Felisa
Toshiba Ceramics Co. Ltd.
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