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A gallium-based liquid alloy with low temperature fluidity, preparation process and thermometer

A low-temperature fluidity, liquid alloy technology, used in thermometers, thermometers based on material expansion/contraction, instruments, etc., can solve problems such as difficulty in ensuring stable operation, temperature limitations of gallium-based alloys, etc., to ensure normal use and stored effect

Active Publication Date: 2016-10-05
HANGZHOU LONGCAN LIQUID METAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This feature has brought great restrictions on the use temperature of gallium-based alloys.
For example, outdoors in winter, it is difficult to ensure stable operation of devices using gallium indium tin alloy materials

Method used

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  • A gallium-based liquid alloy with low temperature fluidity, preparation process and thermometer
  • A gallium-based liquid alloy with low temperature fluidity, preparation process and thermometer
  • A gallium-based liquid alloy with low temperature fluidity, preparation process and thermometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The liquid alloy composition and proportion (weight percent) of the present embodiment are as follows:

[0035]

[0036] The preparation process is:

[0037] Five high-purity metals (purity above 99.9%) of gallium, indium, tin, bismuth and silver are prepared according to the above formula requirements, and put into a vacuum induction melting furnace (the crucible of which is a quartz crucible, which can avoid contamination of the alloy melt) ), and then vacuumize the vacuum induction melting furnace, so that the pressure in the furnace is 2*10 -3 Pa; start the heating process, heat the metal mixture to 1000°C, and melt all kinds of metals into a whole; at this time, reduce the heating power, refine the melted alloy at 750°C for one minute to achieve complete homogenization, and then Turn off the heating power; after cooling, remove the vacuum to take out the liquid alloy to reduce the degree of oxidation. The surface layer of the obtained liquid alloy in contact w...

Embodiment 2

[0043] The liquid alloy composition and proportion (weight percent) of the present embodiment are as follows:

[0044]

[0045]

[0046] The preparation process is:

[0047] Five high-purity metals (purity above 99.9%) of gallium, indium, tin, bismuth and silver are prepared according to the above formula requirements, and put into a vacuum induction melting furnace (the crucible of which is a quartz crucible, which can avoid contamination of the alloy melt) ), and then vacuumize the vacuum induction melting furnace, so that the pressure in the furnace is 2*10 -3 Pa; start the heating process, heat the metal mixture to 1200°C, and melt various metals into a whole; at this time, reduce the heating power, refine the melted alloy at 800°C for one minute to achieve complete homogenization, and then Turn off the heating power; after natural cooling, the vacuum is released to take out the liquid alloy.

[0048] Its phase transition temperature was measured by differential scan...

Embodiment 3

[0051] The liquid alloy composition and proportion (weight percent) of the present embodiment are as follows:

[0052]

[0053] The preparation process is:

[0054] Five high-purity metals (purity above 99.9%) of gallium, indium, tin, bismuth and silver are prepared according to the above formula requirements, and put into a vacuum induction melting furnace (the crucible of which is a quartz crucible, which can avoid contamination of the alloy melt) ), and then vacuumize the vacuum induction melting furnace, so that the pressure in the furnace is 2*10 -3 Pa; start the heating process, heat the metal mixture to 1150°C, and melt various metals into a whole; at this time, reduce the heating power, refine the melted alloy at 750°C for one minute to achieve complete homogenization, and then Turn off the heating power; only after it has completely cooled, release the vacuum to take out the liquid alloy.

[0055] Its phase transition temperature was measured by differential scan...

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Abstract

The invention relates to a gallium-based liquid alloy with low-temperature fluidity, a preparation process and a thermometer. The purpose is to provide a gallium-based liquid alloy with good low-temperature fluidity and its preparation process, so as to reduce the "pre-solidification" temperature of the liquid alloy, improve its low-temperature viscosity, and ensure the normal use and storage of liquid alloy devices in a low-temperature environment. Solution: a gallium-based liquid alloy with low temperature fluidity, which is composed of the following components in weight percentage: gallium 60‑80%, indium 9‑22%, tin 5‑18%, bismuth 0.5‑4%, silver 0.2% -1.5%. The invention has wide applications in mercury substitution in the field of medical equipment, key refrigeration medium in the field of cutting-edge refrigeration, and the like.

Description

technical field [0001] The invention relates to the fields of cutting-edge refrigeration, medical equipment and the like, in particular to a high-end heat transfer medium material or heat-sensitive medium material, which has wide applications in mercury substitution in the field of medical equipment, key refrigeration medium in the field of cutting-edge refrigeration, and the like. Background technique [0002] The alloy system mainly composed of gallium indium tin ternary eutectic alloy can remain liquid at room temperature, and has a wide range of applications in the field of mercury replacement in the field of medical devices and the key refrigeration medium in the field of cutting-edge refrigeration. The body temperature thermometer prepared by using gallium-based room temperature liquid alloy instead of mercury as the temperature sensing liquid has the advantages of accurate data, operation, fast response, low price and environmental protection. Electronic product heat ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C28/00C22C1/02G01K5/22G01K13/20
CPCG01K5/225C22C1/02C22C28/00
Inventor 金明江金学军应仁龙卢现稳
Owner HANGZHOU LONGCAN LIQUID METAL TECH
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