Method for hot pressing beryllium oxide articles

Patent · Tue Aug 09 00:00:00 EDT 1988

OSTI ID:6526573

Ballard, A H; Godfrey, Jr, T G; Mowery, E H

This patent describes a method for preparing an article of beryllium oxide by hot pressing comprising the steps of forming a homogeneous mixture of about 98.5 to 99.5 weight percent of beryllium oxide particulates and sufficient lithium hydroxide in an aqueous solution to provide about 0.25 to 1.5 weight percent equivalent of lithium oxide, contacting the mixture with carbon dioxide for a sufficient duration to convert in situ essentially all the lithium hydroxide to lithium carbonate, and thereafter hot pressing the mixture into an article of desired configuration of near theoretical density. The hot pressing step being characterized by the lithium carbonate being uniformly dispersed throughout the mixture and affixed to the beryllium oxide particulates and converting to lithium oxide during the hot pressing step to provide essentially uniform sintering of the beryllium oxide particulates for providing the article with essentially uniform density.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4762656
• OSTI ID: 6526573
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
BERYLLIUM COMPOUNDS
BERYLLIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
DISPERSIONS
FABRICATION
HOT PRESSING
HYDROGEN COMPOUNDS
HYDROXIDES
LITHIUM COMPOUNDS
LITHIUM HYDROXIDES
LITHIUM OXIDES
MATERIALS WORKING
MIXING
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PRESSING
PROCESS SOLUTIONS
SINTERING
SOLUTIONS