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Magnesium alloy material as well as preparation method and application of magnesium alloy material

A technology of magnesium alloys and master alloys, applied in chemical instruments and methods, manufacturing tools, heat treatment equipment, etc., can solve the problems of unstable discharge voltage, affecting the electrochemical performance and assembly performance of batteries, and low stiffness, and achieve negative discharge potential , shorten the activation time, the effect of high anode utilization

Active Publication Date: 2019-08-16
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after adding such alloy elements, the magnesium alloy anode material, especially for the extremely thin magnesium alloy anode sheet, has the problems of unstable discharge voltage and low stiffness, which affect the electrochemical performance and assembly performance of the battery.

Method used

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  • Magnesium alloy material as well as preparation method and application of magnesium alloy material
  • Magnesium alloy material as well as preparation method and application of magnesium alloy material
  • Magnesium alloy material as well as preparation method and application of magnesium alloy material

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preparation example Construction

[0019] The embodiment of the present invention also provides a method for preparing a magnesium alloy material, comprising the following steps:

[0020] The magnesium alloy material is formed by mixing and melting metals containing Hg, Ga, La, Ce and Mg. Specifically, the pure magnesium ingot is melted and mixed with pure gallium and an intermediate alloy containing Hg, La and Ce respectively.

[0021] More specifically, after melting the pure magnesium ingot under the condition of 690-750° C. in the smelting furnace, then add pure gallium and an intermediate alloy containing Hg, La and Ce respectively for mixing. Specifically, after melting the pure magnesium ingot at 690-750°C in the melting furnace, under the protection of the flux, add pure gallium, Mg-20%Hg master alloy, the Mg-15%La and the Mg -25% Ce. Smelting under the above conditions can ensure the smelting effect, and then ensure that the prepared magnesium alloy material has good performance.

[0022] It should ...

Embodiment 1

[0040] This embodiment provides a magnesium alloy material, which includes 1.2% Hg, 3.8% Ga, 5.0% La, 1.7% Ce, 0.007% Fe, 0.008% Cu, 0.006% Ni, and the rest is Mg.

[0041] This embodiment also provides a method for preparing a magnesium alloy material, comprising the following steps:

[0042] Mixed smelting: First, heat and melt the pure magnesium ingot (10 000g) with a magnesium content of 99.99% at 730°C, and add pure gallium (760g), Mg-20%Hg (1200g ), Mg-15% La (6667g), Mg-25% Ce (1360g), and smelted for 5 minutes to form a molten metal.

[0043] Then, the molten metal and the refining agent are mixed and added according to a mass ratio of 1.5%, stirred for 10 minutes, and then left to stand at 730° C. for 30 minutes, and then poured into a slab. The slab homogenization annealing temperature is 420°C, and the holding time is 19 hours; the surface oxide layer is removed from the slab after homogenization annealing, specifically, the operation of removing the surface oxide la...

Embodiment 2

[0047] This embodiment provides a magnesium alloy material, which includes 5.0% Hg, 0.3% Ga, 1.4% La, 2.1% Ce, 0.008% Fe, 0.006% Cu, 0.007% Ni, and the rest is Mg.

[0048] This embodiment also provides a method for preparing a magnesium alloy material, comprising the following steps:

[0049] Mixed smelting: First, heat and melt the pure magnesium ingot (11393g) with a magnesium content of 99.99% at 750°C, and add pure gallium (60g) and Mg-20% Hg (5000g) under the protection of RJ-2 flux , Mg-15% La (1867g), Mg-25% Ce (1680g), and smelted for 5 minutes to form a molten metal.

[0050] Then, the molten metal and the refining agent are mixed and added according to a mass ratio of 2.5%, stirred for 30 minutes, then left to stand at 750° C. for 20 minutes, and then cast into slabs. The slab homogenization annealing temperature is 350°C, and the holding time is 22 hours; the surface oxide layer is removed from the slab after homogenization annealing, specifically, the operation o...

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Abstract

The invention relates to the field of alloy materials, in particular to a magnesium alloy material as well as a preparation method and application of magnesium alloy material. The magnesium alloy material comprises the following components of, in percentage by mass, 0.01%-6% of Hg, 0.01%-5% of Ga, 0.01%-6.5% of La, 0.01%-5% of Ce, less than or equal to 0.01% of Fe, less than or equal to 0.01% of Cu, less than or equal to 0.01% of Ni, and the balance Mg. The magnesium alloy material has excellent performance, a hydrogen evolution reaction can be effectively inhibited, the activation time is short, and the utilization rate of discharge potential is higher relative to cathode and anode.

Description

technical field [0001] The invention relates to the field of alloy materials, in particular to a magnesium alloy material, its preparation method and application. Background technique [0002] Magnesium has the characteristics of low density, relatively negative standard electrode potential and large theoretical specific capacity, and is an ideal anode material for chemical power sources. The density of magnesium is 1.74g / cm 3 , lower than aluminum (2.70g / cm 3 ) and zinc (7.14g / cm 3 ). The standard electrode potential of magnesium is -2.363V (vs SHE), which is negative than that of aluminum [-2.31 (vs SHE)] and zinc [-1.25 (vs SHE)]. The theoretical specific capacity of magnesium is 2205A.h / kg, which is only lower than lithium (3862A.h / kg) and aluminum (2980A.h / kg), and far greater than the theoretical specific capacity of zinc (820A.h / kg). At present, magnesium anodes have been successfully used in seawater activated batteries, seawater dissolved oxygen batteries, air ...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C23/06C22F1/06C22C23/00C21D9/00H01M4/46H01M6/34H01M12/06H01M12/08C02F1/461C02F101/34
CPCC02F1/46109C02F2001/46133C02F2101/345C21D9/0081C22C1/03C22C23/00C22C23/06C22F1/06H01M4/466H01M6/34H01M12/06H01M12/08Y02E60/10
Inventor 赵虎王顺成杨莉周楠康跃华黄正华
Owner GUANGDONG INST OF NEW MATERIALS
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