Direct-Reading Measurement of Fiber Length/Diameter Distributions / Paul A. Baron, Gregory J. Deye, Joseph E. Fernback, William G. Jones
- Conference Author:
- Advances in Environmental Measurement Methods for Asbestos (1997 : Boulder, Colorado)
- Physical Description:
- 1 online resource (9 pages) : illustrations, figures, tables
- Additional Creators:
- Baron, Paul A., Deye, Gregory J., Fernback, Joseph E., Jones, William G., American Society for Testing and Materials, and ASTM International
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- A new technique for classifying fibers according to length has opened up opportunities for improving fiber measurement technology. The classification principle is dielectrophoresis, which moves conductive fibers at a velocity proportional to the square of their length. Even non-conductive fibers can be made sufficiently conductive by increasing the humidity in the classifier. A device based on this principle has been constructed. It can classify fibers from a broad distribution into length distributions with CVs in the range of 0.2¿̐ư0.3 and with mean lengths selectable from about 4 ?m to >50 ?m. To complement this device, diameter classification readily can be achieved by gravitational or inertial techniques in combination with length classification. An inertial classifier was used to produce relatively monodisperse diameter fibers in the aerodynamic diameter range of 3 ¿̐ư 7 ?m. This device was used to calibrate the response of the Aerodynamic Particle Sizer (APS) so that real-time diameter distributions were obtained for each length distribution from the dielectrophoretic length classifier. By varying the voltage on the length classifier, a length/diameter distribution can be produced in a matter of minutes.
- Dates of Publication and/or Sequential Designation:
- Volume 1999, Issue 1342 (January 1999)
- Other Subject(s):
- 9780803162105 (e-ISBN)
- Digital File Characteristics:
- text file PDF
- Bibliography Note:
- Includes bibliographical references 11.
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- Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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- Reproduction Note:
- Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1999. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
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- Mode of access: World Wide Web.
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- ASTM International PDF Purchase price USD25.
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