Isaac Scientific Publishing

Journal of Advances in Applied Physics

A New Instrument for Determining Charge to Diameter Distributions of Charged Particles

Download PDF (5010.7 KB) PP. 35 - 42 Pub. Date: November 30, 2019

DOI: 10.22606/jaap.2019.11003

Author(s)

  • James H. Anderson*
    SUNY Empire State College, Genesee Valley Learning Center, 680 Westfall Rd.. Rochester, NY 14620, USA

Abstract

A new instrument for measuring the charge-to-diameter ratio of small particles (2-100 μm) is described. In this instrument, the terminal velocity of charged particles in an electric field in air is determined by measuring the time of flight of the particles between two laser beams. The main advantages of this instrument are that it is easy to operate, and only about 15 min. are required to obtain a distribution of charge-to-diameter ratio for a few thousand particles. The major disadvantage is that low charged and uncharged particles cannot be detected.

Keywords

Particle charge, charge distribution, q/d distribution, triboelectricty, tribocharging, elecrophotographic toners.

References

[1] q/d-meter, Epping GmbH, www.epping-pes.de/

[2] Reinhold H. Epping and Andreas Kuettner, J. Electrostatics Volume 55, July 2002, Pages 279-288

[3] Nicholas Hesse et al., Polymers 2019, 11(4) pg. 609.

[4] E-SPART analyzer, Hosokawamicron Corporation, https://hosokawamicron.co.jp/en/machines/172.

[5] Mazumder, M.K.. (1993). KONA Powder and Particle Journal. 11. 105-118. 10.14356/kona.1993013

[6] D. Sami et al. Pharmaceutical Development and Technology, Vol. 12, No. 1 pp. 35-41.

[7] R. B. Lewis, R. F. Koehler and E. W. Connors, Charge Spectrograph, U. S. Patent 4,375,673, March 1, 1983.

[8] G. P. Gee et al in Recent Progress in Toner Technologies, G. Marshall, Ed. IS&T, pp. 195-202.