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Title: Method for hot pressing beryllium oxide articles

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.

Inventors:
 [1];  [1];  [2]
  1. (Oak Ridge, TN)
  2. (Clinton, TN)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
866671
Patent Number(s):
US 4762656
Assignee:
United States of America as represented by United States (Washington, DC) ORNL
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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; /264/501/

Citation Formats

Ballard, Ambrose H., Godfrey, Jr., Thomas G., and Mowery, Erb H. Method for hot pressing beryllium oxide articles. United States: N. p., 1988. Web.
Ballard, Ambrose H., Godfrey, Jr., Thomas G., & Mowery, Erb H. Method for hot pressing beryllium oxide articles. United States.
Ballard, Ambrose H., Godfrey, Jr., Thomas G., and Mowery, Erb H. Fri . "Method for hot pressing beryllium oxide articles". United States. https://www.osti.gov/servlets/purl/866671.
@article{osti_866671,
title = {Method for hot pressing beryllium oxide articles},
author = {Ballard, Ambrose H. and Godfrey, Jr., Thomas G. and Mowery, Erb H.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1988},
month = {Fri Jan 01 00:00:00 EST 1988}
}

Patent:

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