Method and device for measuring alkali metal surface tension coefficients at different temperatures

Abstract

The invention discloses a method and a device for measuring alkali metal surface tension coefficients at different temperatures. The device comprises an electric heating table for melting alkali metal; a container used for containing alkali metal melt; a wick used for measuring the surface tension coefficient of the alkali metal melt; a heater for heating the wick; and a lifting mechanism for clamping and adjusting the height of the wick. The method and the device for measuring the surface tension coefficients of the alkali metal at different temperatures have the advantages that the technical means is simple and easy to implement, the manufacturing cost is low, the surface tension coefficients of the alkali metal at different temperatures can be quickly and accurately measured, and the method and the device have important scientific value and engineering application value.

Description

technical field [0001] The invention relates to the technical field of alkali metal physical parameter measurement and high-temperature heat pipe heat transfer, in particular to a method and device for measuring the surface tension coefficient of alkali metals at different temperatures. Background technique [0002] Regarding the physical parameters of alkali metals, those skilled in the art know that the viscosity coefficients at different temperatures can be calculated according to existing empirical formulas, but the surface tension coefficients at different temperatures are difficult to obtain. [0003] The surface tension of a liquid is the force that acts on the surface of the liquid to reduce its surface area, and the coefficient of surface tension is a physical quantity that describes the magnitude of the surface tension of a liquid. [0004] Alkali metals such as sodium, potassium, and lithium are active and easily oxidized, and their melting points are within 200°C...

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Problems solved by technology

[0005] To measure the surface tension coefficient of alkali metals in a high-temperature molten state, in addition to avoiding the oxidation of the alkali metals in an atmosphere protection environment, putting the experimental equipment in a glove box, and heating the solid alkali metals at room temperature to a molten state, and The temperature of the surrounding environment will also be very high. Commonly used surface tension coefficient measurement methods such as the pull-off method, the maximum bubble method, and the capillary rise method require precision instruments such as force-sensitive sensors and microscopes, and it is difficult to work in a high-temperature environment. Operate in the narrow space of the glove box

[0006] Therefore, the surface tension coefficient measurement method suitable for ordinary liquids is difficult to measure the surface tension coefficient of alkali metals

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