Letter | Published:

Electromotive Force of Dielectrics

Naturevolume 127page440 (1931) | Download Citation



I FOUND some time agol that glasses in aqueous solutions show the electromotive force of a solid electrolyte: the ion in the solid glass determines the potential difference against the solution. Moreover, it could be shown that cations from the solution were exchanged against the cations in the glass: the glass behaves then like a mixed electrode, but in a certain range of concentration practically like an electrode reversible to the ions taken up from the solution. Glasses which show definitely the behaviour of a solid electrolyte (sodium electrode) also show always exchange electrodes, particularly the silver and hydrogen electrode. Certain soft glasses show only the hydrogen electrode except in alkaline solution.

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  1. 1

    Zeit. Physik., 15; 1923.

  2. 2

    Butt. Am. Phys. Soc., Nov. 1930.

  3. 3

    This formula has been used by me since 1924 for the interpretation of different experimental results. See, for example, Bull. Am. Chem. Soc., April 1927, and J. W. V. Osterhout, Bull. Nat. Res. Council, 69, p. 193, footnote 52; 1929.

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  1. Physical Laboratory, Purdue University, Lafayette, Indiana



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