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Magnesium indium solid solution and preparation method thereof

A technology of solid solution and indium powder, which is applied in the field of magnesium indium solid solution and its preparation, can solve the problems of irreversible reversibility, reduce the enthalpy change of hydrogen absorption and desorption of magnesium, and reduce the thermodynamic stability of magnesium hydride, so as to reduce the hydrogen desorption temperature, Fully reversible hydrogen absorption and desorption, excellent hydrogen storage performance

Active Publication Date: 2012-05-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings and deficiencies of the above-mentioned prior art, provide a magnesium indium solid solution and its preparation method, so that the hydrogen absorption and desorption reaction path of magnesium is changed, thereby reducing the hydrogen absorption and desorption enthalpy change of magnesium and reducing the The thermodynamic stability of the hydride has good reversibility at the same time, which solves the problem of irreversibility or poor reversibility in the prior art

Method used

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  • Magnesium indium solid solution and preparation method thereof
  • Magnesium indium solid solution and preparation method thereof
  • Magnesium indium solid solution and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] (1) Mix Mg powder and In powder according to the molar ratio of 95:5 to prepare sample A;

[0030] (2) The sample A prepared according to the ratio of step (1) is ball milled on a planetary ball mill for powder mixing to obtain mixed powder B;

[0031] (3) Compress the mixed powder B obtained in step (2) at 100 MPa to obtain a green body C, and sinter the green body C in a vacuum furnace at 560°C for 3 hours under argon protection, and the protection pressure is 1 atmospheric pressure.

[0032] (4) After the green body C that has been sintered in step (3) is broken, it is ball milled under an argon atmosphere to obtain a magnesium-indium solid solution alloy.

Embodiment 2

[0034] (1) Mix Mg powder and In powder according to the molar ratio of 95:5 to prepare sample A;

[0035] (2) The sample A prepared according to the ratio of step (1) is ball milled on a planetary ball mill for powder mixing to obtain mixed powder B;

[0036] (3) Compress the mixed powder B obtained in step (2) at 100 MPa to obtain a green body C, and sinter the green body C in a vacuum furnace at 400° C. for 3 hours under argon protection, and the protection pressure is 1 atmospheric pressure.

[0037] (4) After the green body C that has been sintered in step (3) is broken, it is ball milled under an argon atmosphere to obtain a magnesium-indium solid solution alloy.

Embodiment 3

[0039] (1) Mix Mg powder and In powder according to the molar ratio of 90:10 to prepare sample A;

[0040] (2) The sample A prepared according to the ratio of step (1) is ball milled on a planetary ball mill for powder mixing to obtain mixed powder B;

[0041] (3) Compress the mixed powder B obtained in step (2) at 100 MPa to obtain a green body C, and sinter the green body C in a vacuum furnace at 560 ° C for 3 hours under argon protection, and the protection pressure is 1 atmospheric pressure.

[0042] (4) After the green body C that has been sintered in step (3) is broken, it is ball milled under an argon atmosphere to obtain a magnesium-indium solid solution alloy.

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Abstract

The invention discloses magnesium indium solid solution and a preparation method thereof. The preparation method comprises the following steps of: preparing a sample A in a molar ratio of magnesium powder to indium powder of (100-x):x, wherein x is more than 0 and less than 12; mixing the sample A on a ball mill to obtain mixed powder B, and then pressing and forming to obtain a green body C; introducing argon in a vacuum furnace for protecting and sintering the green body C, crushing the sintered green body C, and then performing ball-milling on the crushed green body C in an argon atmosphere to obtain the magnesium indium solid solution; and adding an appropriate amount of indium to prepare the magnesium indium solid solution. Therefore, a hydrogen adsorption and desorption reaction path of the magnesium is changed so as to achieve the effects of reducing hydrogen adsorption and desorption enthalpy change and reducing the stability of thermodynamics of magnesium hydride (MgH2). A magnesium indium alloy also has high reversibility, and the problem of irreversibility or low reversibility is solved.

Description

technical field [0001] The invention relates to a hydrogen storage material, in particular to a magnesium indium solid solution and a preparation method thereof. Background technique [0002] The common problem of the hydrogen storage materials researched and developed at present is that they have high thermodynamic stability, so the hydrogen desorption temperature is high; on the other hand, their kinetic properties are poor, especially the hydrogen desorption kinetics. The shortcomings of these two aspects seriously hinder the practical application of hydrogen storage materials. [0003] Among the currently developed hydrogen storage materials, magnesium has widely attracted people's interest due to its high theoretical hydrogen storage capacity, good cycle performance, and abundant magnesium resources, and is considered to be the most promising hydrogen storage material. one. But the formation enthalpy of magnesium hydride is as high as -74.5kJ / mol H 2 , usually need t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/04
Inventor 王辉钟海长欧阳柳章曾美琴朱敏
Owner SOUTH CHINA UNIV OF TECH
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