Investigation of changes in the surface conductivity of lithium fluoride during hydrogen fluoride adsorption

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Abstract

The change in the surface conductivity of lithium fluoride (LiF) during the adsorption of hydrogen fluoride (HF) has been experimentally investigated. It is shown that the specific surface conductivity of lithium fluoride increases approximately 104 times during the HF pressure change in the range of 0–200 Torr. A model is proposed to describe the experimental results obtained.

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About the authors

V. Ya. Agroskin

Federal Research Center for Problems of Chemical Physics and Medical Chemistry, Russian Academy of Sciences

Author for correspondence.
Email: agroskin@mail.ru
Russian Federation, Chernogolovka

B. G. Bravy

Federal Research Center for Problems of Chemical Physics and Medical Chemistry, Russian Academy of Sciences

Email: agroskin@mail.ru
Russian Federation, Chernogolovka

V. I. Guriev

Federal Research Center for Problems of Chemical Physics and Medical Chemistry, Russian Academy of Sciences

Email: agroskin@mail.ru
Russian Federation, Chernogolovka

S. A. Kashtanov

Federal Research Center for Problems of Chemical Physics and Medical Chemistry, Russian Academy of Sciences

Email: agroskin@mail.ru
Russian Federation, Chernogolovka

Yu. A. Chernyshev

Federal Research Center for Problems of Chemical Physics and Medical Chemistry, Russian Academy of Sciences

Email: agroskin@mail.ru
Russian Federation, Chernogolovka

References

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  6. Agroskin V.Ya., Brave B.G., Vasiliev G.K. et al. // Russian Journal of Physical Chemistry B, 17, No. 6, 1265 (2023). https://doi.org/10.1134/S1990793123060131
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2. Fig. 1. Experimental dependence of the specific surface resistance of LiF on the HF pressure – points; solid curves – calculation results for three values ​​of solvation numbers N.

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3. Fig. 2. Schematic diagram of the experimental setup for studying the turbidity of the LiF surface under the influence of HF: 1 – laser, 2 – optical cuvette, 3 – photocell, 4 – millivoltmeter.

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4. Fig. 3. Dependence of the change in the relative intensity of radiation transmitted through the optical cuvette, α = (I0 − I)/I0, on time at PHF = 48 Torr.

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5. Fig. 4 Dependence of the change in the slope tangent k on the pressure of hydrogen fluoride PHF.

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