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Vented Cupped Electrodes

  • L. Toft
  • G. A. Roworth

Abstract

When arcing powder samples in graphite cupped electrodes using the do arc the charge is sometimes ejected from the cup due to the sudden evolution of vapor produced by the rapid heating The practice of venting the packed electrode by pricking into the charge with a pin is not particularly effective in preventing ejection. A more effective method which overcomes the difficulty is to vont the cup at the bottom before filling. This is carried out by drilling two small holes through the cup wall, the holes being diametrically opposed and just above the floor of the cup.

Keywords

Physical Chemistry Powder Sample Small Hole Rapid Heating Sudden Evolution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • L. Toft
    • 1
  • G. A. Roworth
    • 1
  1. 1.Chemical InspectorateWoolwich, London S.E.18England

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