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Preparation method of low-melting-point quinary gallium-based liquid alloy

A liquid alloy, low melting point technology, applied in the field of material metallurgy, can solve problems such as the gap between gallium-based liquid alloys, achieve the effect of simple preparation method, wide application prospects, and solve the threat of environmental pollution

Active Publication Date: 2021-09-21
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the melting point of mercury (–38.87°C), gallium-based liquid alloys still have a large gap, and cannot replace mercury in application scenarios that require lower temperatures

Method used

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  • Preparation method of low-melting-point quinary gallium-based liquid alloy
  • Preparation method of low-melting-point quinary gallium-based liquid alloy
  • Preparation method of low-melting-point quinary gallium-based liquid alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Accurately weigh gallium 16.7742g, indium 2.4420g, tin 0.7235g, zinc 0.0403g and aluminum 0.0200g (the aluminum content is about 0.1%) with an analytical balance. Gallium, indium, tin, and zinc were added first to the graphite crucible, followed by the aluminum. The graphite crucible is moved into the atmosphere furnace, and after vacuuming, it is protected by high-purity argon. Raise the temperature to 700°C and keep it warm for 1h. The graphite crucible was taken out with the furnace cooling to room temperature. After standing for 2 hours and removing the oxide film on the surface, a gallium-based liquid alloy with a low melting point is obtained.

Embodiment 2

[0019] First place the whole bottle of raw gallium in a blast drying oven, heat up to 60°C until it is completely melted, weigh 50.3360g of liquid gallium, and add it to a polytetrafluoroethylene crucible. Then, accurately weigh 7.3210g of indium, 2.1610g of tin, 0.1201g of zinc and 0.0620g of aluminum (about 0.1% of aluminum content) with an analytical balance, and add them into a polytetrafluoroethylene crucible filled with molten gallium. The graphite rod was stirred until the solid metal material was completely dissolved in the molten gallium at 60°C, and the oxide film was removed after standing for 4 hours to obtain a gallium-based liquid alloy with an ultra-low melting point.

Embodiment 3

[0021] Accurately weigh 50.2780g of gallium, 7.3210g of indium, 2.1610g of tin, 0.1200g of zinc and 0.1200g of aluminum (the aluminum content is about 0.2%) with an analytical balance. Gallium, indium, tin, and zinc were added first to the graphite crucible, followed by the aluminum. The graphite crucible is moved into the atmosphere furnace, and after vacuuming, it is protected by high-purity argon. Raise the temperature to 700°C and keep it warm for 1h. The graphite crucible was taken out with the furnace cooling to room temperature. After standing for 2 hours and removing the oxide film on the surface, a gallium-based liquid alloy with a low melting point is obtained.

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Abstract

The invention discloses a preparation method of a low-melting-point quinary gallium-based liquid alloy, and belongs to the field of material metallurgy. According to the preparation method, 83.80%-83.99% by mass of gallium, 12.20% by mass of indium, 3.60% by mass of tin, 0.20% by mass of zinc and 0.01%-0.20% by mass of aluminum are subjected to alloy preparation through an atmosphere smelting method or a gallium dissolution method. According to the preparation method of the ultralow-melting-point gallium-based liquid metal, the gallium-based liquid metal with the melting point being-32 DEG C can be obtained, the preparation method is simple, and industrial production is easy to popularize. The melting point of the obtained gallium-based liquid alloy is similar to that of mercury, and the alloy is safe and non-toxic and can replace mercury products, potential environmental pollution threats are solved, and the alloy has wide application prospects in the new technical fields of flexible electronics, wearable equipment, bionic robots and the like.

Description

technical field [0001] The invention belongs to the field of material metallurgy and relates to an ultra-low melting point gallium indium tin aluminum zinc liquid alloy with a melting point close to that of mercury. The alloy has the characteristics of safety, non-toxicity and low vapor pressure, and can be used to replace mercury. Background technique [0002] Liquid metals at room temperature include mercury, cesium, francium and gallium, whose melting points are –38.87°C, 28.65°C, 27°C and 29.8°C, respectively. Among them, mercury is highly volatile and highly toxic; cesium is easily oxidized in the air and can react violently with water; francium is an unstable radioactive element; only metal gallium is harmless to the human body and is a safe Metal. my country has banned the mining of new primary mercury mines, and at the same time has established a timetable for restrictions and eventual cessation of production for many mercury-related industries and mercury-related p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C28/00C22C1/02
CPCC22C28/00C22C1/02
Inventor 罗鲲耿继业诸葛祥群
Owner CHANGZHOU UNIV
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