Method for hot pressing beryllium oxide articles

Patent · Fri Jan 01 00:00:00 EST 1988

OSTI ID:866671

Ballard, Ambrose H ^[1]; Mowery, Erb H ^[2]

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1. Oak Ridge, TN
2. Clinton, TN

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 National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4762656
• OSTI ID: 866671
• Country of Publication: United States
• Language: English

Related Subjects

method
hot
pressing
beryllium
oxide
articles
powder
density
compacts
gradients
achieved
employing
homogeneous
blend
lithium
sintering
agent
uniformly
dispersed
throughout
mixing
hydroxide
aqueous
solution
converted
situ
carbonate
contacting
flooding
oxide-lithium
stream
carbon
dioxide
remaining
fixed
particles
step
assure
uniform
compact
lithium hydroxide
lithium oxide
uniform density
dispersed throughout
carbon dioxide
aqueous solution
hot pressing
oxide particles
oxide powder
beryllium oxide
density gradient
uniformly dispersed
hot press
oxide articles
density gradients
uniformly disperse
oxide particle
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