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Title: Sintered composite medium and filter

Abstract

A particulate filter medium is formed of a sintered composite of 0.5 micron diameter quartz fibers and 2 micron diameter stainless steel fibers. A preferred composition is about 40 vol. % quartz and about 60 vol. % stainless steel fibers. The media is sintered at about 1100.degree. C. to bond the stainless steel fibers into a cage network which holds the quartz fibers. High filter efficiency and low flow resistance are provided by the smaller quartz fibers. High strength is provided by the stainless steel fibers. The resulting media has a high efficiency and low pressure drop similar to the standard HEPA media, with tensile strength at least four times greater, and a maximum operating temperature of about 550.degree. C. The invention also includes methods to form the composite media and a HEPA filter utilizing the composite media. The filter media can be used to filter particles in both liquids and gases.

Inventors:
 [1]
  1. Pleasanton, CA
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
866338
Patent Number(s):
US 4687579
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
sintered; composite; medium; filter; particulate; formed; micron; diameter; quartz; fibers; stainless; steel; preferred; composition; 40; vol; 60; media; 1100; degree; bond; cage; network; holds; efficiency; flow; resistance; provided; strength; resulting; pressure; drop; similar; standard; hepa; tensile; times; maximum; operating; temperature; 550; methods; form; utilizing; particles; liquids; gases; hepa filter; filter media; pressure drop; stainless steel; operating temperature; filter medium; tensile strength; preferred composition; particulate filter; sintered composite; quartz fiber; micron diameter; flow resistance; /210/55/376/428/

Citation Formats

Bergman, Werner. Sintered composite medium and filter. United States: N. p., 1987. Web.
Bergman, Werner. Sintered composite medium and filter. United States.
Bergman, Werner. Thu . "Sintered composite medium and filter". United States. https://www.osti.gov/servlets/purl/866338.
@article{osti_866338,
title = {Sintered composite medium and filter},
author = {Bergman, Werner},
abstractNote = {A particulate filter medium is formed of a sintered composite of 0.5 micron diameter quartz fibers and 2 micron diameter stainless steel fibers. A preferred composition is about 40 vol. % quartz and about 60 vol. % stainless steel fibers. The media is sintered at about 1100.degree. C. to bond the stainless steel fibers into a cage network which holds the quartz fibers. High filter efficiency and low flow resistance are provided by the smaller quartz fibers. High strength is provided by the stainless steel fibers. The resulting media has a high efficiency and low pressure drop similar to the standard HEPA media, with tensile strength at least four times greater, and a maximum operating temperature of about 550.degree. C. The invention also includes methods to form the composite media and a HEPA filter utilizing the composite media. The filter media can be used to filter particles in both liquids and gases.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

Patent:

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