The measurement and evaluation of the contact potential difference between various powders and a metal

Hiroaki Masuda, Takayuki Itakura, Kuniaki Gotoh, Tohru Takahashi, Takashi Teshima

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Experimental and theoretical studies were conducted on the measurement and evaluation of the contact potential difference between various powders and a metal. The apparent dielectric constant of the powder layer that appeared in the theory was also measured and compared with some theoretical models. It was confirmed that the apparent contact potential difference of a polymer powder is proportional to the square of the powder layer thickness as theoretically predicted. The evaluation of the time change of the contact potential difference gives the relaxation characteristics of the initial charge of the powder layer. Also, it was found that the measuring time is drastically reduced by thinning the powder layer. The relationship between the packing fraction of the powder layer and the apparent dielectric constant was also found to be well represented by Maxwell's equation.

Original languageEnglish
Pages (from-to)295-303
Number of pages9
JournalAdvanced Powder Technology
Volume6
Issue number4
DOIs
Publication statusPublished - Jan 1 1995
Externally publishedYes

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanics of Materials

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