The base alloy of gallium

 

(57) Abstract:

The invention relates to alloys of gallium. The alloy contains gallium, indium and tin in the following ratio, wt.%: gallium 67 - 92, India 5 - 22, tin, 3 - 11. The alloy may optionally contain up to 2 wt.% bismuth and/or up to 2 wt.% antimony and impurities of lead and/or zinc in an amount of not more than 0.0001 wt.%. We offer alloy can be used as a measuring fluid to thermometers or as a lubricant that enhances its technological capabilities. 3 C.p. f-crystals, 2 Il.

The invention relates to alloys, in particular to the base alloy of gallium.

Famous-based alloy of gallium containing indium (see patent GB N 246843, 1926). Known alloy contains gallium and indium in a ratio of 95 : 5. It is used as a measuring fluid to thermometers. However, the known alloy is solidified at a low temperature, why when it is used as a measuring liquid thermometer can crack.

Thus, the disadvantage of this alloy is that its technological capabilities are limited.

The objective of the invention is to enhance the technological capabilities of Spago, he further comprises tin, in the following ratio, wt.%:

Gallium - 67 - 92

Indium - 5 - 22

Tin - 3 - 11

At the specified composition of the alloy is liquid at temperature ranges of from about -15oC to above +1800oC.

Preferably the proposed alloy is used as the measuring liquid to thermometers. Due to its low melting point and high boiling point of the proposed alloy meets the requirements of this measuring liquid. Components of gallium, indium and tin is especially low point of the eutectic. In addition, the alloy has an electrical conductivity, making it suitable for use in contact thermometers.

We offer alloy can also be used as a lubricant, in particular when used in a vacuum, high vacuum and ultra high vacuum.

According to a preferred variant of the invention, the alloy may contain up to 2 wt. % bismuth, and about 2 wt.% antimony. Antimony increases the resistance to oxidation, and bismuth beneficial effect on the fluidity of the alloy. In addition, antimony, and bismuth as well as tin, are cheap substances that lying is 2 wt.% leads to a noticeable and undesirable increase the melting point.

Preferably, we offer alloy contains only a small proportion of impurities, such as lead or zinc, which is less than 0.001 wt.%, in particular less than 0.0001 weight%.

According to a particularly preferred form of the invention, the alloy contains components in the following ratio, wt.%:

Gallium - 68 - 69

Indium - 21 - 22

Tin - 9,5 - 10,5

The alloy of this composition has a melting point under normal conditions at atmospheric pressure -19,5oC.

We offer alloy can be used as a measuring fluid to thermometer, made with the possibility of specifying the maximum temperature, and thermometer can be shown on the design drawings. In the drawings presents:

Fig. 1 is a view of thermometer in the front,

Fig. 2 is a cross section along the line I-I in Fig. 1.

According to the drawing in the glass body 1 placed the tank 2 with the measuring capillary tube 3 connected to the tank 2 through the intermediate section 4. The tank 2 is filled with the proposed eutectic alloy 5, which according to Fig. 1 has already reached a certain height due to the increase in temperature. In the area of the measuring capillary tube 3, the vessel is equipped with a scale of 6.

As can be seen n is gesio alloy 5 to the measuring capillary tube 3. In contrast, the intermediate section 4 is preferably made with a circular cross section of the passage in order to reduce the adhesion force on a given area, thus providing an indication of the maximum thermometer temperature.

Near the opposite tank 2 to the end of thermometer on the outer surface of the glass body 1 weld small irregular protrusions, forming a covering body 1 ring, which not only facilitates the manipulation of thermometer, but can also be painted and to serve as a code.

1. The base alloy of gallium containing indium and tin, used as a measuring fluid to thermometers or as a lubricant, characterized in that it contains these components in the following ratio, wt.%:

Gallium - 67 - 92

Indium - 5 - 22

Tin - 3 - 11

2. Alloy under item 1, characterized in that it contains these components in the following ratio, wt.%:

Gallium - 68 - 69

Indium - 21 - 22

Tin - 9,5 - 10,5

3. Rafting on the PP.1 and 2, characterized in that it additionally contains up to 2 wt.% bismuth and/or up to 2 wt.% antimony.

4. Rafting on one of the PP.1 to 3, characterized in that it contains an admixture of pig

 

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