Ga-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: 2015-05-06
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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  • Ga-based liquid alloy with low-temperature fluidity, preparation process and thermometer
  • Ga-based liquid alloy with low-temperature fluidity, preparation process and thermometer
  • Ga-based liquid alloy with low-temperature fluidity, preparation process and thermometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Present embodiment liquid alloy composition and proportioning (percentage by weight) are as follows:

[0035]

[0036] The preparation process is:

[0037] Gallium, indium, tin, bismuth and silver five kinds of high-purity metals (with a purity of more than 99.9%) are prepared according to the above formula requirements, and put together into a vacuum induction melting furnace (the crucible is a quartz crucible, which can avoid polluting 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 program, heat the metal mixture to 1000°C to 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, the vacuum is released to take out the liquid alloy to reduce the degree of oxidation. A layer of stable oxide film is formed on the s...

Embodiment 2

[0043] Present embodiment liquid alloy composition and proportioning (percentage by weight) are as follows:

[0044]

[0045]

[0046] The preparation process is:

[0047] Gallium, indium, tin, bismuth and silver five kinds of high-purity metals (with a purity of more than 99.9%) are prepared according to the above formula requirements, and put together into a vacuum induction melting furnace (the crucible is a quartz crucible, which can avoid polluting 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 program, heat the metal mixture to 1200°C to melt all kinds of 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 supply; remove the vacuum and take out the liquid alloy after natural cooling.

[0048] The phase transition temperature was tested by diffe...

Embodiment 3

[0051] Present embodiment liquid alloy composition and proportioning (percentage by weight) are as follows:

[0052]

[0053] The preparation process is:

[0054] Gallium, indium, tin, bismuth and silver five kinds of high-purity metals (with a purity of more than 99.9%) are prepared according to the above formula requirements, and put together into a vacuum induction melting furnace (the crucible is a quartz crucible, which can avoid polluting 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 program, heat the metal mixture to 1150°C to 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 supply; remove the vacuum and take out the liquid alloy after complete cooling.

[0055] The phase transition temperature was tested by differential s...

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Abstract

The invention relates to Ga-based liquid alloy with low-temperature fluidity, a preparation process and a thermometer, and aims to provide the Ga-based liquid alloy with the low-temperature fluidity and the preparation process for the Ga-based liquid alloy to reduce 'pre-solidification' temperature of the liquid alloy, improve low-temperature viscosity of the liquid alloy and guarantee normal use and storage of a liquid alloy device in a low-temperature environment. According to a scheme, the Ga-based liquid alloy with the low-temperature fluidity comprises the following components in percentage by weight: 60-80% of Ga, 9-22% of Im, 5-18% of Sn, 0.5-4% of Bi and 0.2-1.5% of Ag. The Ga-based liquid alloy is widely applied to aspects of mercury substitution in the field of medical appliances, key refrigerating media in the field of highly sophisticated refrigeration and the like.

Description

technical field [0001] The invention relates to the fields of cutting-edge refrigeration and medical equipment, and is specifically a high-end heat transmission medium material or heat-sensitive medium material, which has wide applications in mercury substitution in the field of medical equipment and key refrigeration medium in the field of cutting-edge refrigeration. Background technique [0002] The alloy system mainly composed of gallium-indium-tin ternary eutectic alloy can maintain a liquid state at room temperature, and has a wide range of applications in mercury substitution in the field of medical equipment and key refrigeration media in the field of advanced 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 dissipation devices usi...

Claims

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Application Information

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Patent Type & Authority Applications(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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