Sintered composite filter
Abstract
A particulate filter medium formed of a sintered composite of 0.5 micron diameter quartz fibers and 2 micron diameter stainless steel fibers is described. Preferred composition is about 40 vol.% quartz and about 60 vol.% stainless steel fibers. The media is sintered at about 1100/sup 0/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/sup 0/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:
- Issue Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 6557815
- Application Number:
- ON: DE87007242
- Assignee:
- Dept. of Energy
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; AIR FILTERS; COMPOSITE MATERIALS; EFFICIENCY; FABRICATION; FIBERS; FLUID FLOW; HIGH TEMPERATURE; HUMIDITY; PRESSURE EFFECTS; QUARTZ; SINTERING; STAINLESS STEELS; ALLOYS; CHALCOGENIDES; CHROMIUM ALLOYS; CORROSION RESISTANT ALLOYS; EQUIPMENT; FILTERS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; MINERALS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; POLLUTION CONTROL EQUIPMENT; SILICON COMPOUNDS; SILICON OXIDES; STEELS; 420200* - Engineering- Facilities, Equipment, & Techniques
Citation Formats
Bergman, W. Sintered composite filter. United States: N. p., 1986.
Web.
Bergman, W. Sintered composite filter. United States.
Bergman, W. Fri .
"Sintered composite filter". United States.
@article{osti_6557815,
title = {Sintered composite filter},
author = {Bergman, W},
abstractNote = {A particulate filter medium formed of a sintered composite of 0.5 micron diameter quartz fibers and 2 micron diameter stainless steel fibers is described. Preferred composition is about 40 vol.% quartz and about 60 vol.% stainless steel fibers. The media is sintered at about 1100/sup 0/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/sup 0/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 = {1986},
month = {5}
}