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High-uniformity vanadium-titanium-based hydrogen storage alloy and preparation method thereof

A hydrogen storage alloy, vanadium-titanium-based technology, applied in the direction of chemical instruments and methods, hydrogen, non-metallic elements, etc., to achieve the effect of avoiding serious burning of the alloy, obvious technical advantages, and inhibiting macro-segregation

Active Publication Date: 2022-05-03
HOPE CLEAN ENERGY (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a high-uniformity vanadium-titanium-based hydrogen storage alloy and its preparation method in view of the problems existing in the current preparation process of vanadium-titanium-based hydrogen storage alloys

Method used

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  • High-uniformity vanadium-titanium-based hydrogen storage alloy and preparation method thereof
  • High-uniformity vanadium-titanium-based hydrogen storage alloy and preparation method thereof
  • High-uniformity vanadium-titanium-based hydrogen storage alloy and preparation method thereof

Examples

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Embodiment 1

[0043] A method for preparing a high-uniformity V-Ti-Cr-Fe hydrogen storage alloy, comprising the following steps:

[0044] S1. FeV80-A alloy, MHT-95 titanium sponge, metal chromium, electrolytic manganese, and rare earth particles are selected as raw materials, wherein the particle size of FeV80 alloy is 5-15mm; the particle size of metal chromium is 5-20mm, and the particle size of rare earth particles is 10-30mm;

[0045] S2, charging, directly adding high-melting-point FeV80 alloy, sponge titanium, and metal chromium into the water-cooled copper crucible of the vacuum induction suspension melting furnace in batches, adding electrolytic manganese and metal cerium into the feeder of the vacuum induction suspension melting furnace, Then vacuumize to make the vacuum degree reach 0.001Pa, and then fill with argon to make the partial pressure reach about 500Pa;

[0046] S3. After the vacuum and partial pressure meet the requirements, start to increase the power in stages to heat...

Embodiment 2

[0053] The preparation method of Example 2 is the same as that of Example 1, except that the rare earth is metal lanthanum, and the obtained hydrogen storage alloy is V a Ti b Cr c Fe d mn e La f Hydrogen storage alloys. Figure 4 is V a Ti b Cr c Fe d mn e La f Hydrogen absorption kinetics curves of hydrogen storage alloys. Depend on Figure 4 It can be obtained that the hydrogen storage alloy prepared in this embodiment can reach 3.50wt% hydrogen absorption at 20°C;

Embodiment 3

[0055] Embodiment 3 is the same as Embodiment 1, and its difference is that no rare earth is added, and the hydrogen storage alloy obtained is V a Ti b Cr c Fe d Hydrogen storage alloys. Figure 5 is V a Ti b Cr c Fe d Hydrogen absorption kinetics curves of hydrogen storage alloys. Depend on Figure 5 It can be obtained that the hydrogen absorption amount can reach 3.49wt% at 20°C, and the hydrogen absorption time of the alloy without rare earth addition is significantly longer than that of the alloy with rare earth addition. The addition of rare earth can improve the hydrogen absorption channel of the alloy and increase the hydrogen absorption speed of the alloy.

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Abstract

The invention discloses a high-uniformity vanadium-titanium-based hydrogen storage alloy and a preparation method thereof. The preparation method comprises the following steps: S1, weighing raw materials according to a component proportion; s2, the high-melting-point raw materials are added into a water-cooled copper crucible of a vacuum induction suspension smelting furnace, and the low-melting-point raw materials are added into a feeder of the vacuum induction suspension smelting furnace; s3, after the high-melting-point raw materials are completely melted, adding the low-melting-point raw materials; s4, after smelting is finished, furnace cooling is carried out to obtain an alloy ingot, and the alloy ingot is turned over and then smelted again; and S5, after the S4 is finished, casting is conducted through a casting mold, and the vanadium-titanium-based hydrogen storage alloy ingot is obtained. By adopting and improving a vacuum induction suspension smelting technology, the problems of serious alloy burning loss, crucible corrosion and the like can be avoided, an alloy purification function is achieved in the preparation process, macrosegregation of components is effectively inhibited, the hydrogen absorption pressure of the prepared hydrogen storage alloy is 3-5 MPa, the reversible hydrogen storage capacity can reach 3.1 wt% when hydrogen is absorbed at the temperature of 0 DEG C and desorbed at the temperature of 60 DEG C, and the hydrogen storage alloy is suitable for being used as a hydrogen storage material. The technical advantages are obvious.

Description

technical field [0001] The invention relates to the technical field of hydrogen storage alloy preparation, in particular to a high-uniformity vanadium-titanium-based hydrogen storage alloy and a preparation method thereof. Background technique [0002] Vanadium-titanium-based hydrogen storage alloy has the advantages of large hydrogen storage capacity at room temperature and fast hydrogen absorption and desorption speed. It has been applied in the fields of hydrogen storage, purification, compression, and hydrogen isotope separation. Thermal energy and mechanical energy conversion and other fields have broad application prospects. At present, vanadium-titanium-based hydrogen storage alloys are usually prepared by smelting, but the main raw materials of vanadium-titanium-based hydrogen storage alloys have melting points of vanadium-iron master alloy, metal Cr, and sponge Ti as high as 1800°C, 1857°C, and 1668°C, respectively. It is also as high as about 1600°C. What is more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22F1/02C22C30/00C22C27/02C22F1/18C01B3/00
CPCC22C1/03C22F1/02C22C30/00C22C27/025C22F1/18C01B3/0052
Inventor 唐孝宗吴朝玲黄吉钟骁严义刚陈云贵张强谭永军赵上马唐光顺李淑恒
Owner HOPE CLEAN ENERGY (GRP) CO LTD
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