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Title: Method for forming porous sintered bodies with controlled pore structure

Abstract

The present invention is based, in part, on a method for combining a mixture of hydroxide and hydride functional siloxanes to form a polysiloxane polymer foam, that leaves no residue (zero char yield) upon thermal decomposition, with ceramic and/or metal powders and appropriate catalysts to produce porous foam structures having compositions, densities, porosities and structures not previously attainable. The siloxanes are mixed with the ceramic and/or metal powder, wherein the powder has a particle size of about 400 .mu.m or less, a catalyst is added causing the siloxanes to foam and crosslink, thereby forming a polysiloxane polymer foam having the metal or ceramic powder dispersed therein. The polymer foam is heated to thermally decompose the polymer foam and sinter the powder particles together. Because the system is completely nonaqueous, this method further provides for incorporating reactive metals such as magnesium and aluminum, which can be further processed, into the foam structure.

Inventors:
 [1];  [2]
  1. 4929 Julie St., Livermore, Alameda County, CA 94550
  2. 4070 Guilford Ave., Livermore, Alameda County, CA 94550
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
873084
Patent Number(s):
6087024
Assignee:
Whinnery, LeRoy Louis (4929 Julie St., Livermore, Alameda County, CA 94550);Nichols, Monte Carl (4070 Guilford Ave., Livermore, Alameda County, CA 94550)
Patent Classifications (CPCs):
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08L - COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; forming; porous; sintered; bodies; controlled; pore; structure; based; combining; mixture; hydroxide; hydride; functional; siloxanes; form; polysiloxane; polymer; foam; leaves; residue; zero; char; yield; thermal; decomposition; ceramic; metal; powders; appropriate; catalysts; produce; structures; compositions; densities; porosities; previously; attainable; mixed; powder; particle; size; 400; catalyst; added; causing; crosslink; dispersed; therein; heated; thermally; decompose; sinter; particles; completely; nonaqueous; provides; incorporating; reactive; metals; magnesium; aluminum; processed; metal powders; porous foam; dispersed therein; reactive metals; ceramic powder; polymer foam; active metal; thermal decomposition; particle size; reactive metal; powder particles; metal powder; pore structure; porous sintered; controlled pore; thermally decompose; sintered bodies; foam structure; forming porous; polysiloxane polymer; active metals; /428/264/501/

Citation Formats

Whinnery, LeRoy Louis, and Nichols, Monte Carl. Method for forming porous sintered bodies with controlled pore structure. United States: N. p., 2000. Web.
Whinnery, LeRoy Louis, & Nichols, Monte Carl. Method for forming porous sintered bodies with controlled pore structure. United States.
Whinnery, LeRoy Louis, and Nichols, Monte Carl. Sat . "Method for forming porous sintered bodies with controlled pore structure". United States. https://www.osti.gov/servlets/purl/873084.
@article{osti_873084,
title = {Method for forming porous sintered bodies with controlled pore structure},
author = {Whinnery, LeRoy Louis and Nichols, Monte Carl},
abstractNote = {The present invention is based, in part, on a method for combining a mixture of hydroxide and hydride functional siloxanes to form a polysiloxane polymer foam, that leaves no residue (zero char yield) upon thermal decomposition, with ceramic and/or metal powders and appropriate catalysts to produce porous foam structures having compositions, densities, porosities and structures not previously attainable. The siloxanes are mixed with the ceramic and/or metal powder, wherein the powder has a particle size of about 400 .mu.m or less, a catalyst is added causing the siloxanes to foam and crosslink, thereby forming a polysiloxane polymer foam having the metal or ceramic powder dispersed therein. The polymer foam is heated to thermally decompose the polymer foam and sinter the powder particles together. Because the system is completely nonaqueous, this method further provides for incorporating reactive metals such as magnesium and aluminum, which can be further processed, into the foam structure.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}