Compositions: coating or plastic – Coating or plastic compositions – Natural resin or derivative containing
Patent
1988-12-19
1990-03-20
Morris, Theodore
Compositions: coating or plastic
Coating or plastic compositions
Natural resin or derivative containing
1062867, 1062868, 4273835, C08L 9100, C09D 100
Patent
active
049098500
ABSTRACT:
A bonding material for Al.sub.2 O.sub.3 is provided by preparing a mixture of 73.0% by weight of molybdenum, 8.5% by weight of manganese, 1.5% by weight of manganese fluoride, 6.0% by weight of lithium fluoride and 11.0% by weight of silicon dioxide, the percentages being approximate. The mixture is added to a carrier of pine oil, xylene and toluene and the resulting bonding compound is applied to the surfaces to be bonded. Polycrystalline or single crystal (Al.sub.2 O.sub.3) surfaces with the bonding material applied thereto are dried and, after drying, the surfaces to be bonded are placed in contact. The resulting assembly is fired at a sufficiently high temperature for the formation of a bond between the surfaces. A polycrystalline or single crystal Al.sub.2 O.sub.3 surface can be bonded to a metal surface by firing the Al.sub.2 O.sub.3 surface having the bonding material applied thereto prior to placing the surfaces to be bonded in contact. The bonding compound can be used to improve the hermetic sealing of the bonded joints formed using the bonding compound and for plating a metal on an Al.sub.2 O.sub.3 surface.
REFERENCES:
patent: 3801363 (1974-02-01), Buck
patent: 4486257 (1984-12-01), Ebata
Holloway William W.
Morris Theodore
Southtech Inc.
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