Plastic and nonmetallic article shaping or treating: processes – Reactive gas or vapor treatment of work
Patent
1986-10-10
1988-08-09
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Reactive gas or vapor treatment of work
264332, 501 94, C04B 3508
Patent
active
047626569
ABSTRACT:
The hot pressing of beryllium oxide powder into high density compacts with little or no density gradients is achieved by employing a homogeneous blend of beryllium oxide powder with a lithium oxide sintering agent. The lithium oxide sintering agent is uniformly dispersed throughout the beryllium oxide powder by mixing lithium hydroxide in an aqueous solution with beryllium oxide powder. The lithium hydroxide is converted in situ to lithium carbonate by contacting or flooding the beryllium oxide-lithium hydroxide blend with a stream of carbon dioxide. The lithium carbonate is converted to lithium oxide while remaining fixed to the beryllium oxide particles during the hot pressing step to assure uniform density throughout the compact.
REFERENCES:
patent: 2413644 (1946-12-01), Nicholson
patent: 3529046 (1970-09-01), Hendricks
Ballard Ambrose H.
Godfrey, Jr. Thomas G.
Mowery Erb H.
Derrington James
Hamel Stephen D.
Hightower Judson R.
Larcher Earl L.
The United States of America as represented by the United States
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