Method for preparing Mg2Ni alloy through ionic liquid displacement and thermal treatment

An ionic liquid and alloy technology, which is applied in the field of Mg2Ni alloy prepared by ionic liquid replacement-heat treatment, can solve the problems of high equipment requirements of mechanical alloying method, difficult alloy chemical ratio, difficult large-scale production, etc., and achieve simple equipment and process, high composition Uniform, particle size controlled effect

Inactive Publication Date: 2015-05-20
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method provided by the invention solves the problem of preparing Mg by high-temperature smelting 2 Ni alloy is difficult to control the chemical ratio, serious composition segregation, high energy consumption, high equipment requirements for mechanical alloying, easy introduction of impurities, and difficulty in large-scale production. The present invention is realized through the following technical solutions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The ionic liquid displacement-heat treatment prepares Mg 2 The method for Ni alloy, its concrete steps are as follows:

[0021] (1) Preparation of Mg-Ni bimetallic powder: First, nickel salt (anhydrous nickel tetrafluoroborate) was dissolved in ionic liquid ([Bmim]BF 4 ), then add magnesium powder with a particle size of 0.1 μm to the ionic liquid containing nickel salt under stirring conditions to react for 0.5 h to obtain an ionic liquid mixture, wherein the concentration of nickel ions in the ionic liquid mixture is 0.01mol / L, and finally the ionic liquid The mixture is filtered to obtain a filter residue, and the filter residue is washed and vacuum-dried to obtain Mg-Ni bimetallic powder, wherein the molar ratio of magnesium powder to nickel ions in the ionic liquid mixture is 3:1, and the vacuum drying condition is that the vacuum degree is 0.01Mpa, The drying temperature is 80°C, the drying time is 3 hours, and the mass percentage of nickel in the Mg-Ni bimetalli...

Embodiment 2

[0024] The ionic liquid displacement-heat treatment prepares Mg 2 The method for Ni alloy, its concrete steps are as follows:

[0025] (1) Preparation of Mg-Ni bimetallic powder: Firstly, nickel salt (anhydrous nickel nickel chloride) was dissolved in ionic liquid ([Emim]Cl), and then particles were added to the ionic liquid containing nickel salt under stirring condition. Magnesium powder with a diameter of 10 μm was reacted for 4 hours to obtain an ionic liquid mixture, wherein the concentration of nickel ions in the ionic liquid mixture was 1mol / L, and finally the ionic liquid mixture was filtered to obtain a filter residue, which was washed and vacuum-dried to obtain Mg-Ni bimetallic powder , wherein the molar ratio of magnesium powder to nickel ions in the ionic liquid mixture is 4:1, the conditions of vacuum drying are vacuum degree of 0.01Mpa, drying temperature of 80°C, drying time of 3 hours, nickel in Mg-Ni bimetallic powder The mass percentage is 44.6%;

[0026] (...

Embodiment 3

[0028] The ionic liquid displacement-heat treatment prepares Mg 2 The method for Ni alloy, its concrete steps are as follows:

[0029] (1) Preparation of Mg-Ni bimetallic powder: first dissolve nickel salt (anhydrous nickel sulfonate) into ionic liquid ([Bmim]OTf), and then add particle size to the ionic liquid containing nickel salt under stirring condition React 5 μm magnesium powder for 2 hours to obtain an ionic liquid mixture, wherein the concentration of nickel ions in the ionic liquid mixture is 0.1mol / L, and finally the ionic liquid mixture is filtered to obtain a filter residue, and the filter residue is washed and vacuum-dried to obtain Mg-Ni bimetallic powder , wherein the molar ratio of magnesium powder to nickel ions in the ionic liquid mixture is 3.5:1, the conditions of vacuum drying are vacuum degree of 0.01Mpa, drying temperature of 80°C, drying time of 3 hours, nickel in Mg-Ni bimetallic powder The mass percentage is 49.1%;

[0030] (2) Preparation of Mg 2...

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Abstract

The invention relates to a method for preparing Mg2Ni alloy through ionic liquid displacement and thermal treatment, and belongs to the technical field of metal materials. The method for preparing the Mg2Ni alloy through ionic liquid displacement and thermal treatment comprises the steps that (1) preparation of Mg-Ni bimetal powder is carried out, wherein nickel salt dissolves in ionic liquid, magnesium powder is added to the ionic liquid with the nickel salt under the condition of stir, a reaction is carried out to obtain an ionic liquid mixture, filtration is carried out on the ionic liquid mixture to obtain filter residues, and washing and vacuum drying are carried out on the filter residues to obtain the Mg-Ni bimetal powder; (2) preparation of the Mg2Ni alloy is carried out, wherein thermal treatment is carried out on the Mg-Ni bimetal powder obtained through the step (1) under the vacuum condition or in the inert environment, and the Mg2Ni alloy can be prepared. The method for preparing the Mg2Ni alloy through ionic liquid displacement and thermal treatment solves the problems that when a high-temperature melting method is used for preparing the Mg2Ni alloy, the chemical ratio cannot be easily controlled, component segregation is high, and energy consumption is high, and the problems that mechanical alloying is high in equipment requirement, impurities can be easily introduced, and scale production cannot be easily achieved.

Description

technical field [0001] The invention relates to an ionic liquid replacement-heat treatment for preparing Mg 2 A Ni alloy method belongs to the technical field of metal materials. Background technique [0002] Magnesium-nickel hydrogen storage alloy has a large hydrogen absorption capacity (Mg 2 NeH 4 3.6wt%), high electrochemical hydrogen storage capacity (theoretical value is 965mAh g -1 ), low density, rich resources, low price, small environmental load, and good hydrogen absorption and desorption platform, etc., it has become one of the most promising hydrogen storage materials. At present, the main methods for preparing magnesium-nickel hydrogen storage alloys include high-temperature melting method and mechanical alloying method. The high-temperature smelting method is the main method for industrially preparing magnesium-nickel hydrogen storage alloys. However, since the melting points of magnesium and nickel are 650°C and 1455°C, respectively, the difference betwee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/00C22C19/03
Inventor 徐存英华一新李坚
Owner KUNMING UNIV OF SCI & TECH
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