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Title: Granulation of fine powder

A mixture of fine powder including thorium oxide was converted to granulated powder by forming a first-green-body and heat treating the first-green-body at a high temperature to strengthen the first-green-body followed by granulation by crushing or milling the heat-treated first-green-body. The granulated powder was achieved by screening through a combination of sieves to achieve the desired granule size distribution. The granulated powder relies on the thermal bonding to maintain its shape and structure. The granulated powder contains no organic binder and can be stored in a radioactive or other extreme environment. The granulated powder was pressed and sintered to form a dense compact with a higher density and more uniform pore size distribution.
Inventors:
Issue Date:
OSTI Identifier:
1289917
Assignee:
Los Alamos National Security, LLC (Los Alamos, NM) LANL
Patent Number(s):
9,409,825
Application Number:
13/971,157
Contract Number:
AC52-06NA25396
Resource Relation:
Patent File Date: 2013 Aug 20
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Other works cited in this record:

Granulating fine powders into millimetric spheres with a multiscale porosity: The case of titania
journal, April 2011
  • Pringuet, Antoine; Pagnoux, C├ęcile; Videcoq, Arnaud
  • Microporous and Mesoporous Materials, Vol. 140, Issue 1-3, p. 17-24
  • DOI: 10.1016/j.micromeso.2010.09.005

Critical parameters and limiting conditions in binder granulation of fine powders
journal, December 1997

Microgranulation of fine powders by a novel rotating fluidized bed granulator
journal, April 2003

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