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Gallium-based liquid alloy temperature-sensing liquid, preparation method and application thereof

A technology of liquid alloy and temperature-sensing liquid, which is applied in thermometers, thermometers based on the expansion/contraction of materials, instruments, etc., can solve the problems of high melting temperature, restrictions on wide use, solidification and expansion of gallium-based liquid alloys, etc., and achieve cost reduction , good market potential, excellent fluidity and thermal conductivity

Active Publication Date: 2017-01-11
WUXI MEDICAL INSTR FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The melting temperature of gallium indium tin alloys currently used in the market is generally high, generally around 10°C. Once the ambient temperature of the device using the gallium indium tin ternary alloy is too low, the gallium-based liquid alloy is prone to solidification and expansion, which will cause the temperature of the thermometer to rise. damage to
In addition, the high content of indium in the existing gallium indium tin alloy formula leads to high production costs, which restricts the widespread use of gallium indium tin alloy in mercury-free liquid alloy thermometers and other fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] In this example, the formula and mass percentage of gallium-based liquid alloy temperature-sensing liquid are: gallium 61.7%, indium 8.2%, copper 0.7%, zinc 11.5%, aluminum 0.4% and tin 17.5%, and the purity of the above components is 99.9%. above.

[0014] Preparation method: weigh and prepare gallium, indium, copper, zinc, aluminum and tin according to the above proportions, then put them together into a vacuum induction melting furnace, close the furnace door and vacuumize. Evacuate to a vacuum of 2*10 -3 Pa, start the heating program, the heating temperature is 900 o C. After 2 minutes of heat preservation, the metals are completely melted, and continue heating for about one minute to make the alloy melt completely homogenized, and then turn off the heating power. The alloy melt continues to be stored in a vacuum environment, and the vacuum is released after the environment is completely cooled to obtain and take out the gallium-based liquid alloy.

[0015] Galli...

Embodiment 2

[0017] In this example, the formula and mass percentage of gallium-based liquid alloy temperature-sensing liquid are: gallium 55.4%, indium 13.1%, copper 1.5%, zinc 16.2%, aluminum 1.0% and tin 12.8%, and the purity of the above components is 99.9%. above.

[0018] Preparation method: weigh and prepare gallium, indium, copper, zinc, aluminum and tin according to the above proportions, then put them together into a vacuum induction melting furnace, close the furnace door and vacuumize. Evacuate to a vacuum of 3*10 -3 Pa, start the heating program, the heating temperature is 1050 o C. After keeping warm for 2 minutes, wait until the metals are completely melted, continue heating for about one minute to make the alloy melt completely homogenized, and then turn off the heating power. The alloy melt continues to be stored in a vacuum environment, and the vacuum is released after the environment is completely cooled, and the gallium-based liquid alloy is obtained and taken out.

...

Embodiment 3

[0021] In this example, the formula and mass percentage of gallium-based liquid alloy temperature sensing liquid are: gallium 64.3%, indium 10.2%, copper 0.9%, zinc 8.3%, aluminum 0.7% and tin 15.6%, and the purity of the above components is 99.9%. above.

[0022] Preparation method: Gallium, indium, copper, zinc, aluminum and tin are weighed and prepared according to the above ratio, and then put together into a vacuum induction melting furnace, and the furnace door is closed to vacuumize. Evacuate to a vacuum of 2*10 -3 Pa, and then add high-purity argon to 0.7 atmospheric pressure. Then start the heating program, the heating temperature is 1100 o C. After 2 minutes of heat preservation, the metals are completely melted, continue to heat for about one minute, so that the alloy melt is completely homogenized, and then turn off the heating power. The alloy melt continues to be stored in a vacuum environment, and the vacuum is released after the environment is completely coo...

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PUM

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Abstract

The invention discloses a gallium-based liquid alloy temperature-sensing liquid, which belongs to the field of novel materials. The gallium-based liquid alloy temperature-sensing liquid comprises the following components by mass: 52 to 68% of gallium, 7 to 12% of indium, 0.5 to 2% of copper, 7 to 20% of zinc, 0.3 to 1.2% of aluminum and 8 to 18% of tin. The gallium-based liquid alloy temperature-sensing liquid can stably maintain a liquid state in a low-temperature environment, has excellent fluidity and thermal conductivity and guarantees that a device using the gallium-based liquid alloy temperature-sensing liquid can be retained and normally operates at a low ambient temperature; moreover, the melting point of the gallium-based liquid alloy temperature-sensing liquid is no higher than 2 DEG C, which is better than the melting point of commercially available gallium-based liquid alloy at present. The invention furthers a preparation method and application of the gallium-based liquid alloy temperature-sensing liquid.

Description

technical field [0001] The invention relates to a liquid alloy material, specifically a gallium-based liquid alloy temperature-sensing liquid, a preparation method and an application thereof, belonging to the field of new materials. Background technique [0002] On January 19, 2013, more than 140 countries, including China, reached the "International Convention on the Prevention and Control of Mercury Pollution" after several rounds of negotiations, which will monitor and restrict the production and trade of mercury-containing products on a global scale to reduce the impact of mercury pollution on the environment. damage and impact on human health. According to the Convention, countries will phase out the production and use of mercury-containing thermometers and sphygmomanometers by 2020. Therefore, it is imminent to choose a green and environmentally friendly low-melting point alloy to replace mercury as the temperature-sensing fluid of thermometers. The development of hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C28/00C22C1/02G01K5/12
Inventor 李逸
Owner WUXI MEDICAL INSTR FACTORY