Method for hot pressing beryllium oxide articles
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.
- Research Organization:
- Oak Ridge Y-12 Plant, TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- Assignee:
- Dept. of Energy
- Patent Number(s):
- 4,762,656
- Application Number:
- 06/917,460, ON: DE88000875
- OSTI ID:
- 6047547
- Country of Publication:
- United States
- Language:
- English
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Method for hot pressing beryllium oxide articles
THE FABRICATION OF BERYLLIUM BY HOT ISOSTATIC PRESSING AND BY IMPACT EXTRUSION
Related Subjects
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ADDITIVES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BERYLLIUM COMPOUNDS
BERYLLIUM OXIDES
CHALCOGENIDES
FABRICATION
HOT PRESSING
HYDROGEN COMPOUNDS
HYDROXIDES
LITHIUM COMPOUNDS
LITHIUM HYDROXIDES
LITHIUM OXIDES
MATERIALS WORKING
OXIDES
OXYGEN COMPOUNDS
PRESSING
SINTERING