DEVICE FOR DETERMINING THE DEPENDENCE OF ELECTRONIC WORK FUNCTION OF METALS AND ALLOYS ON TEMPERATURE Russian patent published in 1994 - IPC

FIELD: determination of physical and chemical properties of metals and alloys. SUBSTANCE: after vacuum heat treatment metals M₁ and M₂ are placed in reservoirs 1 and 2, and the charging hoppers are unsoldered along lines A-A and B-B. Then the device proper is unsoldered from the exhaust unit and placed inside the air thermostat allowing the device to be fixed in any position in the space. To measure the electronic work function of component M₁, the device is turned clockwise through an angle of approximately 90 ≃ 90^°, and part of metal is poured off into measuring compartment 4. When the device returns to the initial position, metal from measuring compartment 4 through tube 14 runs off down-wards and drops out into upper sleeve 7 flooding the lower ends of cathode 11 and glass pocket 12 with thermocouple 13. Measuring compartment 4 provides for a constant volume of liquid melt 8 delivered to upper sleeve 7, i. e. a constant level of melt, and, consequently, a constant depth of submersion of the thermocouple. To measure the electronic work function of alloy, part of liquid metal M₂ is poured off from reservoir 2 by turning the device "towards yourself" through a definite angle in the plane perpendicular to the sheet plane, into U-shaped proportioner 3, whose volume is graduated relative to the marks. Having noticed the level of metal in the U-shaped tube, the device is turned "from yourself" beyond the sheet plane and the known amount of metal M₂ is added to metal M₁, i. e. an alloy of the known composition is formed. Transfer of the alloy to upper sleeve 7 for measuring the electronic work function is effected in the same way as for metal M₁. EFFECT: facilitated procedure. 3 dwg