Process for joining alumina ceramic bodies

Details Process for joining alumina ceramic bodies Process for joining alumina ceramic bodies

1997-09-23

1999-09-21

Mayes, Curtis

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 8912, 1563066, 73780, 3612834, B32B 3126, C04B 3700, G01L 912

Patent

active

059549009

ABSTRACT:
This process serves to form a long-time-vacuum-tight, high-strength, and corrosion-resistant joint, by means of a joining material, between a first body and a second body each made of sintered, polycrystalline alumina ceramic with a purity greater than 92 wt. % or of sapphire. The joining material is interposed in the form of a paste, a foil, or a slip between the first body and the second body. The joining material has been made from 1) an agglomerate-free, highly disperse, high-purity .alpha.-alumina powder with particles of as high a degree of calcination as possible and of a size not exceeding 100 nm (=10.sup.-7 m), 2) an anorganic oxidic powder of an auxiliary sintering agent with particles of approximately the same size as the particle size of the .alpha.-alumina powder, 3) an organic vehicle which is dissolved or suspended in an organic or aqueous solvant and in which the particles of the respective powder are distributed as evenly as possible. Instead of the anorganic oxidic powder of an auxiliary sintering agent an anorganic oxidic auxiliary sintering agent produced chemically as envelopes around or attachment to the particles of the .alpha.-alumina powder can be used, the total .alpha.-alumina and auxiliary-sintering-agent content of the paste, the foil, or the slip ranging between 50% and 70%. After interposing the joining material the bodies are heated to a temperature of not more than 1,300.degree. C. and then allowing them to cool down.

REFERENCES:
patent: 3239323 (1966-03-01), Folweiler
patent: 3736222 (1973-05-01), Arendt
patent: 4177496 (1979-12-01), Bell et al.
patent: 4388668 (1983-06-01), Bell et al.
patent: 4426673 (1984-01-01), Bell et al.
patent: 4780160 (1988-10-01), Kipp
patent: 4780161 (1988-10-01), Mizuhara
patent: 4980236 (1990-12-01), Oomen et al.
patent: 5005421 (1991-04-01), Hegner et al.
patent: 5050034 (1991-09-01), Hegner et al.
patent: 5050035 (1991-09-01), Hegner et al.
patent: 5334344 (1994-08-01), Hegner et al.
patent: 5349492 (1994-09-01), Kimura et al.
patent: 5539611 (1996-07-01), Hegner et al.

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