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Controllable magnesium-containing hydrogen storage alloy preparation method

A hydrogen storage alloy and alloy technology, which is applied in the field of preparation of controllable magnesium-containing hydrogen storage alloys, can solve the problems of burning loss and intensified oxidation, complicated process, and high equipment requirements, so as to improve the absorption rate of alloy elements and ensure uniformity and precision , Reduce burning loss and volatilization effect

Inactive Publication Date: 2016-07-27
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low melting point (923K) of magnesium and the high vapor pressure of magnesium, if there are other elements with high melting point in the alloy, it is necessary to increase the melting power and increase the melting temperature to fully melt all the elements, and the low melting point of magnesium will inevitably cause burning. The degree of damage and oxidation is intensified, and the uniformity and stability of the melting process and composition become difficult to control, which affects the quality of the alloy.
[0005] It is also reported that the preparation of magnesium-containing alloys can also adopt the method of secondary feeding, first melting the high melting point metal, then putting the low melting point metal in the bag, and pouring the molten high melting point metal into the molten low melting point metal, such as Dissolve magnesium metal (melting point around 650°) into iron (melting point 1538°), but in this method, elements with low melting point volatilize a lot, and the stability and uniformity of the alloy are still difficult to effectively control
[0006] The preparation method (CN1764731A) of the Mg-REM-Ni series hydrogen storage alloy disclosed by Japan Heavy Chemical Industry Co., Ltd. Osawa Masato etc. first melts the rare earth and Ni to form an alloy solution, then adds magnesium in the alloy solution, and then passes the control The Mg-REM-Ni hydrogen storage alloy is prepared under the pressure and cooling speed in the furnace. This method also uses the method of secondary charging. The process is complicated and requires high equipment requirements. The equipment needs to have the function of controlling the cooling rate; in addition, the addition of magnesium element in this method is at 1250-1400°C, and it is difficult to control the volatilization, burning loss and uniformity of magnesium element in actual operation

Method used

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  • Controllable magnesium-containing hydrogen storage alloy preparation method
  • Controllable magnesium-containing hydrogen storage alloy preparation method
  • Controllable magnesium-containing hydrogen storage alloy preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] To prepare 20gMg by traditional smelting method 2 The preparation process of Ni (Mg excess 15%) alloy is:

[0041] 1. Ingredients: According to 20gMg 2 The Ni alloy will be calculated. The Mg content is 9.06g, Ni is 10.94g, and the magnesium excess is 15%. The total magnesium is 10.42g. The total weight of magnesium and nickel is 21.36g. Both magnesium and nickel are in powder form. Mix the magnesium powder and nickel powder. Piece.

[0042] 2 Put the pressed block sample into the crucible of the water-cooled suspension melting furnace.

[0043] 3. After washing the furnace 1 to 4 times, usually after 3 times, turn on the power and adjust the power of the melting furnace to raise the temperature in the crucible to about 100°C, then turn off the power and continue vacuuming below 0.5Pa, and finally pass in 0.05MPa The Ar gas is protected to complete the smelting preparations.

[0044] 4. Melting: Turn on the power, the power will rise to 38KW in about 45 seconds, and the nickel...

Embodiment 2

[0047] 20gMg prepared by the preparation method provided by the invention 2 Ni alloy, the specific production process is:

[0048] 1. Ingredients: According to 20gMg 2 The Ni alloy will be calculated. The Mg content is 9.06g, the Ni is 10.94g, the magnesium excess is 15%, the total magnesium is 10.42g, the total weight of magnesium and nickel is 21.36g, the magnesium is a cut piece of pure magnesium ingot, and the nickel used for coating is 0.2 mm thick nickel foil.

[0049] 2. Press the magnesium figure 1 After being coated by the method shown, it is put into a crucible of a water-cooled suspension melting furnace.

[0050] 3. After washing the furnace 1 to 4 times, usually 4 times, turn on the power supply, adjust the power of the melting furnace to raise the temperature in the crucible to about 100℃, then turn off the power supply and continue to vacuum to below 0.5Pa, and finally pass in 0.05MPa The Ar gas is protected to complete the smelting preparations.

[0051] 4. Melting: ...

Embodiment 3

[0056] 20gMg prepared by the preparation method provided by the invention 2 Cu alloy, its specific preparation process is:

[0057] 1. Ingredients: According to 20gMg 2 Cu alloy will be calculated, which contains 8.67g of Mg, 11.33g of Cu, 10% excess of magnesium, a total of 9.537g of magnesium, and a total weight of 20.867g of magnesium and copper. Magnesium is a cut piece of pure magnesium ingot, and copper used for coating magnesium ingot It is a 0.1mm thick copper foil.

[0058] 2. Put the magnesium ingot as figure 1 After being coated by the method shown, it is put into a crucible of a water-cooled suspension melting furnace.

[0059] 3. Wash the furnace 1 to 4 times, usually 4 times, turn on the power, adjust the power of the smelting furnace, so that the temperature in the crucible rises to about 100℃, then turn off the power and continue to evacuate to below 0.5Pa, and finally pass the 0.05MPa Ar gas protects and completes the smelting preparations.

[0060] 4. Melting: Turn...

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Abstract

The invention discloses a controllable magnesium-containing hydrogen storage alloy preparation method.The method is characterized by including material preparation of a magnesium-containing hydrogen storage alloy, magnesium coating and induction smelting.The controllable magnesium-containing hydrogen storage alloy preparation method solves the problem of addition in smelting of high-melting metals and low-melting metals such as magnesium in the hydrogen storage alloy, and is especially effective in control of volatilization and burning loss of magnesium.Due to combination of magnesium coating and induction smelting, burning loss of magnesium is quite slow and controllable, alloy element absorption rate is greatly increased, uniformity and accuracy of chemical components are guaranteed, and a preparation process and equipment requirements are simplified relatively.

Description

Technical field [0001] The invention relates to a method for preparing a controllable magnesium-containing hydrogen storage alloy. It belongs to the field of alloy preparation. Background technique [0002] Magnesium is one of the ten most widely distributed elements in nature and one of the lightest structural metal materials. Alloys composed of magnesium are used as structural materials and functional materials in aerospace, casting, chemical electronics, communications, instruments, and machinery manufacturing. , Transportation and energy storage materials have been widely used. [0003] The emergence of hydrogen storage alloys as a new type of functional material has opened up a broad road for the utilization of hydrogen. Hydrogen storage alloys can be used in solid-state hydrogen storage, Ni / MH batteries, hydride heat pumps, catalysts, and hydrogen purification. ;Hydrogen storage alloys have developed to this day, and there are many varieties, which can be divided into diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C19/03C22C9/00
CPCC22C1/02C22C1/023C22C9/00C22C19/007C22C19/03
Inventor 蒲朝辉杜俊霖王润博娄豫皖许小鸥吴铸李志林
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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