METHOD FOR DETERMINING VALUE OF ELECTRON WORK FUNCTION Russian patent published in 2024 - IPC G01R29/12 G01N27/60 

FIELD: measurement.

SUBSTANCE: invention relates to non-destructive testing of metals and alloys. Method for determining the value of the work function of an electron is characterized by that on the surface of the metal or alloy which is preliminarily cleaned from contaminants, the contact potential difference is measured by a calibrated device, having in its composition a sensor and a processing and display unit, wherein the sensor consists of an electromechanical oscillatory system, an electromagnetic oscillation exciter, a buffer amplifier of a signal picked up from a dynamic capacitor formed by a measuring electrode included in the sensor and the surface of the controlled metal or alloy, wherein the processing and display unit consists of a signal amplifier, a microprocessor of the main signal processing, control and indication, a liquid crystal display of information, as well as a power supply unit with an accumulator, and when measuring the contact potential difference, the sensor is applied to the surface of the controlled metal or alloy, the measuring electrode from nickel during the contact potential difference measurement oscillates, wherein the measuring electrode mechanical oscillations are set by the microprocessor clocked from the quartz resonator, and after measuring the contact potential difference, the value of the electron output of the metal or alloy is calculated by formula Ap=4.733854-0.8573U, where Ap is the calculated value of the electron work function, eV; U is the contact potential difference relative to nickel, measured on the surface of the metal or alloy, V.

EFFECT: improving measurement accuracy and reducing labour costs when determining EWF of metals in air.

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