A kind of preparation method of alh3/mgcl2 nanocomposite powder

A nano-composite and powder technology, applied in chemical instruments and methods, metal hydrides, inorganic chemistry, etc., can solve the problems of harsh reaction conditions, large grain size, complex process, etc., and achieve high thermal activity and easy dehydrogenation. , the effect of simple process

Active Publication Date: 2015-08-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of AlH containing AlH prepared by existing methods. 3 Phase precursor materials have complex processes, low dehydrogenation, and AlH 3 The disadvantages of large grain size, harsh reaction conditions and high cost provide an AlH 3 / MgCl 2 Preparation method of nanocomposite powder

Method used

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  • A kind of preparation method of alh3/mgcl2 nanocomposite powder
  • A kind of preparation method of alh3/mgcl2 nanocomposite powder
  • A kind of preparation method of alh3/mgcl2 nanocomposite powder

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specific Embodiment approach

[0018] Specific embodiment: This embodiment is a kind of AlH 3 / MgCl 2 The preparation method of nanocomposite powder is specifically completed according to the following steps:

[0019] 1. Preparation of nanocrystalline MgH 2 Powder: Put magnesium powder with a particle size of 0.1mm-2mm or a magnesium alloy powder with a particle size of 0.1mm-2mm in the ball milling tank, and put the ball into the grinding ball at a ratio of (30-120):1 to the mass of the ball. Ball milling under a hydrogen atmosphere at a speed of 250r / min~400r / min for 15h~20h, to obtain nanocrystalline MgH with a grain size of 9nm~11nm and a powder size of 1μm~10μm 2 powder;

[0020] 2. Ball milling and reaction: ①First, the nanocrystalline MgH with a grain size of 9nm~11nm and a powder size of 1μm~10μm 2 Powder and AlCl 3 The powder is mixed uniformly, and then placed in the ball milling tank, and the ball is placed in the ball at a ratio of (30 to 120):1; ②Under the conditions of a hydrogen atmosphere and a pr...

specific Embodiment approach 2

[0025] Specific embodiment two: this embodiment is different from specific embodiment one in that: the magnesium alloy described in step one is ZK60; the Mg content in the ZK60 is 93.5%, the Zn content is 6%, and the Zr content is 0.5%. The other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Specific embodiment three: This embodiment is different from specific embodiment one or two in that: in step one, magnesium powder with a particle size of 0.05mm-2mm or magnesium alloy powder with a particle size of 0.05mm-2mm is placed in a ball milling tank , Put the ball into the ball at a ratio of (40~100):1 in the mass ratio of the ball, and mill it at a speed of 300r / min~400r / min for 16h~20h under a hydrogen atmosphere to obtain a grain size of 9nm~11nm. Nanocrystalline MgH with a particle size of 1μm~10μm 2 powder. The other steps are the same as the first or second embodiment.

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Abstract

The invention discloses an AlH3 / MgCl2 nanometer complex powder preparation method, and relates to a preparation method for an AlH3 phase-containing precursor material. A purpose of the present invention is to solve disadvantages of complex process, low dehydrogenation amount, large AlH3 grain particle size, harsh reaction conditions and high cost of the existing preparation method for the AlH3 phase-containing precursor material. The preparation method comprises: 1, preparing nanometer crystal MgH2 powder; and 2, carrying out ball milling, and carrying out a reaction. According to the present invention, the particle size of the AlH3 grain in the prepared AlH3 / MgCl2 nanometer complex powder is 5.5-6.5 nm, the prepared AlH3 / MgCl2 nanometer complex powder has advantages of high thermal activity and easy dehydrogenation, vacuum dehydrogenation test results show that the dehydrogenation amount of the AlH3 / MgCl2 complex powder can achieve 8.5-9 wt%, and the preparation method has advantages of simple process, low cost, easily achieved reaction conditions and low risk, and is suitable for industrial preparation of the AlH3 precursor material.

Description

Technical field [0001] The present invention relates to a kind of 3 Preparation method of phase precursor material. Background technique [0002] AlH 3 It is off-white crystal with a density of about 1.48g / cm 3 , Its theoretical hydrogen storage content is 10.08wt.%. It can release hydrogen at 150°C and is one of the promising hydrogen storage materials. AlH 3 As a high-energy fuel, it has the advantages of high specific impulse, lower combustion temperature, and good compatibility, making it possible to be used in solid propellants; as an excellent hydrogen storage material, AlH 3 It has certain applications in fuel cells, organic chemical synthesis, polymer synthesis and atomic layer deposition technology. Although in theory AlH 3 It is an ideal hydrogen storage material, but the current preparation contains AlH 3 The method of the precursor material of the phase is mostly wet synthesis: LiAlH 4 And 100% H 2 SO 4 Is the initial reactant, prepared with AlH in tetrahydrofuran so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B6/06
Inventor 胡连喜段聪文薛旦
Owner HARBIN INST OF TECH
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