Melting point tubes loading

Here you use a loaded melting point capillary tube (see Loading the Melting Point Tube ) and attach it directly to the thermometer. The thermometer, unfortunately, has bulges there are some problems, and you may snap the tube while attaching it to the thermometer. 

Loading the Melting Point Tube Closing Off Melting Point Tubes... 

From a practical point of view, creep becomes an important natural phenomenon when the temperature at which a metal is loaded lies above about 0,4 to 0,5 of its melting point on an absolute scale. In some metals such as zirconium, which undergo a solid state phase change, creep becomes an important effect above about one-half of the temperature of the phase transformation. In many metals such as steel, creep is almost nonexistent at room temperatures if the metal is not loaded above its annealed yield strength. However, at 900"F (482"C> steel can creep readily al very small stresses, and equipment such as boilers and tubes for petroleum cracking stills, intended to operate at high temperatures for long periods... 

For ternary system measurements, the two solids to be studied are first mixed to provide intimate contact. The minimum melting point for the solid-solid binary at atmospheric conditions occurs at the eutectic composition. A solid mixture of this composition is prepared in the expectation that a similar ratio of the components will be present in the liquid phase at the first melting point in the ternary mixture. The solid mixture is melted and stirred to obtain a homogenous liquid. Some of the liquid is drawn into a capillary tube. The remaining liquid is poured out onto a clean sheet of aluminum foil. After the binary liquid cools and solidifies, the thin sheet of solid material is broken up into "flakes" for loading into the view cell. 

The common form of the target is the metallic foil, but metals melt at high temperature caused by high beam intensity of the particles. Other forms are oxides, carbonates, nitrates, etc., contained in the aluminum tubes, which are flattened after loading to maximize heat loss. The choice of aluminum is owing to its high melting point. 

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