Refractory oxide fabrication

Details Refractory oxide fabrication Refractory oxide fabrication

1981-06-12

1982-11-02

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156644, 156646, 156654, 156657, 156667, B44C 122, C03C 1500, C03C 2506, C23F 102

Patent

active

043572022

ABSTRACT:
Refractory oxide materials, for example, Al.sub.2 O.sub.3 (sapphire) and Al.sub.2 MgO.sub.4 (spinel) can be shaped to precise dimensions by using a preformed member having a higher melting temperature than the oxide in the outline of the desired shape placed in contact with the refractory oxide and subjecting the combination to a temperature between 1500.degree. C. and the melting temperature of the oxide in the presence of a forming gas atmosphere containing an inert gas and approximately 15% hydrogen. The refractory oxide is etched over the area of contact.

REFERENCES:
patent: 4008111 (1977-02-01), Rutz
patent: 4038117 (1977-07-01), Noble et al.
patent: 4098917 (1978-07-01), Bullock et al.
IBM Technical Disclosure Bulletin, vol. 18, No. 12, May 1976, Selective Etching of Sapphire by R. F. Rutz, pp. 4185-4186.
Dushman-Vacuum Technology, 4th Edition, pp. 765-767.
Journal of Electrochemical Society, vol. 126, No. 6, Jun. 1979, pp. 1004-1008.

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