Magnesium-nickel-yttria hydrogen storage alloy thin belt and preparation method thereof

A hydrogen storage alloy and thin strip technology, which is applied in the field of magnesium-nickel-yttrium hydrogen storage alloy and its preparation, can solve the problems of high production cost, waste of magnesium resources, alloy composition change, etc., and achieve low equipment requirements and increase the area , low cost effect

Inactive Publication Date: 2013-05-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the serious evaporation of magnesium in the prior art, resulting in changes in alloy composition, waste of magnesium resou

Method used

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  • Magnesium-nickel-yttria hydrogen storage alloy thin belt and preparation method thereof
  • Magnesium-nickel-yttria hydrogen storage alloy thin belt and preparation method thereof
  • Magnesium-nickel-yttria hydrogen storage alloy thin belt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1:

[0025] This embodiment is a magnesium-nickel hydrogen storage alloy ribbon. The raw materials of the magnesium-nickel hydrogen storage alloy ribbon include massive magnesium with a purity of 99.8% and powdered nickel with a purity of 99.8%, according to the chemical formula Mg 67 Ni 33 The stoichiometric ratio of magnesium is weighed, and the magnesium excess is 5wt.% as the burning loss. The stoichiometric weight is shown in Table 1. In this example, 88.243g of magnesium and 99.959g of nickel powder were weighed.

[0026] Table 1 Alloy smelting ingredients list

[0027]

[0028]

[0029] Note: Mg excess 5wt.%, Y excess 2wt.%.

[0030] This embodiment also proposes a method for preparing a magnesium-nickel hydrogen storage alloy ribbon. The specific steps are:

[0031] Step 1. The nickel powder is pre-pressed into a block. Put the weighed nickel powder into a mold with an inner cavity diameter of 10 mm, and place the mold in a tablet press. The tablet press was p...

Example Embodiment

[0038] Example 2:

[0039] This embodiment is a magnesium-nickel-yttrium hydrogen storage alloy ribbon. The raw materials of the magnesium-nickel-yttrium hydrogen storage alloy ribbon include bulk magnesium with a purity of 99.8% and magnesium-30 yttrium with a purity of 99.8%. The intermediate alloy and powdered nickel with a purity of 99.8% are weighed according to the stoichiometric ratio of the chemical formula Mg67Ni32Y1, and the magnesium excess is 5wt.% and the yttrium excess is 2wt.% as the burning loss. The stoichiometric weight is shown in Table 1. In this embodiment, 76.673g of magnesium, 15.470g of magnesium-30 yttrium master alloy, and 96.116g of nickel powder are weighed.

[0040] This embodiment also proposes a method for preparing a magnesium-nickel-yttrium hydrogen storage alloy ribbon. The specific steps are:

[0041] Step 1. The nickel powder is pre-pressed into a block. Put the weighed nickel powder into a mold with an inner cavity diameter of 10 mm, and place ...

Example Embodiment

[0048] Example 3:

[0049] This embodiment is a magnesium-nickel-yttrium hydrogen storage alloy ribbon. The raw materials of the magnesium-nickel-yttrium hydrogen storage alloy ribbon include bulk magnesium with a purity of 99.8% and magnesium-30 yttrium with a purity of 99.8%. Master alloy and powdered nickel with a purity of 99.8%, according to the chemical formula Mg 67 Ni 30 Y 3 The stoichiometric ratio of magnesium was weighed, and the magnesium excess was 5wt.% and the yttrium excess was 2wt.% as the burning loss. The stoichiometric weight is shown in Table 1. In this embodiment, 54.107g of magnesium, 45.640g of magnesium-30 yttrium master alloy, and 88.619g of nickel powder are weighed.

[0050] This embodiment also proposes a method for preparing a magnesium-nickel-yttrium hydrogen storage alloy ribbon. The specific steps are:

[0051] Step 1. The nickel powder is pre-pressed into a block. Put the weighed nickel powder into a mold with an inner cavity diameter of 10 mm, an...

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Abstract

A magnesium-nickel-yttria hydrogen storage alloy thin belt and a preparation method thereof. The hydrogen storage material contains 67at.% of Mg, and 33at.% of nickel and yttrium, wherein yttrium accounts for 0-10at.%, and the rest is nickel. Yttrium is added in a form of a magnesium yttrium intermediate alloy; nickel is added in a form of briquetted nickel powder; a two-step method is adopted to prepare a mother alloy by smelting; and the prepared alloy is remelted and quenched in a single roller melt quenching furnace to obtain a thin belt namely the finished hydrogen storage material. The material provided by the invention improves the hydrogen storage capacity and hydrogen absorption-desorption kinetic properties of a Mg2Ni type hydrogen storage alloy, and overcomes the contradiction that hydrogen storage capacity and dynamic property of Mg base alloy can not be improved at the same time. The invention has the characteristics of simple preparation method, low cost, and low requirement on equipment and environment.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage alloy materials, and in particular relates to a magnesium-nickel-yttrium hydrogen storage alloy and a preparation method thereof. Background technique [0002] Among all metals and alloys, elemental magnesium has the highest hydrogen storage capacity, up to 7.6wt.%, and magnesium-based alloys have the characteristics of abundant resources, light weight, low price, and no pollution, and are considered to be the most promising fuel cells. , Hydrogen storage materials for hydrogen-fueled vehicles, etc. However, the kinetic properties of Mg and Mg-based hydrogen storage alloys are poor, and there is still a certain distance from practical use. [0003] In order to improve the hydrogen storage performance of Mg-based hydrogen storage alloys, people mainly improve them from two aspects: one is to refine the grain and structure, such as mechanical ball milling and melt quenching; the other is t...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C19/03C22C1/02B22D11/04
Inventor 张铁邦李金山宋文杰寇宏超王军胡锐钟宏
Owner NORTHWESTERN POLYTECHNICAL UNIV
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