Method for preparing V-Ti-Cr-Fe hydrogen storage alloy

A v-ti-cr-fe, hydrogen storage alloy technology, applied in the field of hydrogen storage alloy preparation, can solve the problems of alloy pollution, crucible damage, etc., and achieve the effect of low energy consumption, low cost and simple process

Active Publication Date: 2015-11-11
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies of the prior art, to provide a method for preparing a non-smelting V-Ti-Cr-Fe hydrogen storage alloy, which can not only avoid the alloy damage caused by the high melting temperature of raw materials or alloys in the smelting method. Contamination, crucible damage issues, and alloys prepared without macrosegregation in composition

Method used

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  • Method for preparing V-Ti-Cr-Fe hydrogen storage alloy
  • Method for preparing V-Ti-Cr-Fe hydrogen storage alloy
  • Method for preparing V-Ti-Cr-Fe hydrogen storage alloy

Examples

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Embodiment 1

[0034] This embodiment prepares (V 20 Ti 36.4 Cr 39.6 Fe 4 ) 97 Ce 3 Hydrogen storage alloy, the raw materials are chromium powder, titanium sponge, FeV80 alloy and metal cerium, the process steps are as follows;

[0035] (1) Preparation of hydride powder

[0036] Preparation of titanium hydride powder: Put titanium sponge into the reactor in a glove box filled with argon protective atmosphere, and vacuumize the reactor to 1×10 -2Pa, and heated to 200 ° C for 3 hours, after the end of the heat preservation, keep the temperature at 200 ° C, fill the reactor with hydrogen until the hydrogen pressure in the reactor is 1 MPa, keep the hydrogen pressure for 3 hours to obtain titanium hydride, and then hydrogenate Titanium is cooled to room temperature, ground in a glove box filled with argon protective atmosphere, and then passed through a 200-mesh sieve to obtain titanium hydride powder;

[0037] Preparation of FeV80 hydride powder: put the FeV80 alloy into the reactor, and...

Embodiment 2

[0050] This embodiment prepares (V 30 Ti 32 Cr 32 Fe 6 ) 97 La 3 Hydrogen storage alloy, the raw materials are chromium powder, titanium sponge, FeV80 alloy and metal lanthanum, the process steps are as follows:

[0051] (1) Preparation of hydride powder

[0052] Preparation of titanium hydride powder: Put titanium sponge into the reactor in a glove box filled with argon protective atmosphere, and vacuumize the reactor to 1×10 -2 Pa, and heated to 400°C for 2 hours. After the heat preservation, keep the temperature at 400°C, fill the reactor with hydrogen until the hydrogen pressure in the reactor is 3MPa, keep the hydrogen pressure for 2h to obtain titanium hydride, and then hydrogenate Titanium is cooled to room temperature, ground in a glove box filled with argon protective atmosphere, and then passed through a 200-mesh sieve to obtain titanium hydride powder;

[0053] Preparation of FeV80 hydride powder: put the FeV80 alloy into the reactor, and vacuumize the reacto...

Embodiment 3

[0066] This embodiment prepares (V 60 Ti 22.4 Cr 5.6 Fe 12 ) 97 PR 3 Hydrogen storage alloy, the raw materials are chromium powder, titanium sponge, FeV80 alloy and metal praseodymium, the process steps are as follows:

[0067] (1) Preparation of hydride powder

[0068] Preparation of titanium hydride powder: in a glove box filled with argon protective atmosphere, put titanium sponge into the reactor, and vacuumize the reactor to 1×10 -2 Pa, and heated to 600 ° C for 1 hour, after the end of the heat preservation, keep the temperature at 600 ° C, fill the reactor with hydrogen until the hydrogen pressure in the reactor is 5 MPa, keep the hydrogen pressure for 1 hour to obtain titanium hydride, and then the titanium hydride Cool to room temperature, and pass through a 200-mesh sieve to obtain titanium hydride powder after grinding in a glove box filled with an argon protective atmosphere;

[0069] Preparation of FeV80 hydride powder: put the FeV80 alloy into the reactor,...

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Abstract

A method for preparing V-Ti-Cr-Fe hydrogen storage alloy comprises the steps that (1) titanium hydride powder, FeV80 hydride powder and light rare earth hydride powder are prepared; (2) according to the component ratio of the V-Ti-Cr-Fe hydrogen storage alloy, chromium powder, the titanium hydride powder, the FeV80 hydride powder and the light rare earth hydride powder are weighed in an argon protection atmosphere and evenly mixed to obtain mixed powder, the mixed powder is pressed and formed in the argon protection atmosphere, and a V-Ti-Cr-Fe alloy cold-pressed blank is obtained; and (3) sintering is conducted, i.e., the V-Ti-Cr-Fe alloy cold-pressed blank obtained in the step (2) is sintered in vacuum at the temperature of 1250-1500 DEG C for 4-8 h, and the V-Ti-Cr-Fe hydrogen storage alloy is obtained. By means of the method, the problems of alloy pollution and crucible damage caused by high melting temperature of raw materials or alloy in a smelting method can be avoided. Moreover, component macro-segregation of the prepared alloy cannot occur.

Description

technical field [0001] The invention belongs to the field of preparation of hydrogen storage alloys, in particular to a preparation method of V-Ti-Cr-Fe hydrogen storage alloys. 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 V-Ti-Cr-Fe hydrogen storage alloys are vanadium-iron master alloys, metal Cr, and sponge Ti. The melting points are as high as 1800°C, 1902°C, and 1668°C, respectively. , The melting point of the alloy is also as high as about 1600 ° C, so a high temperature is required...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C30/00
Inventor 吴朝玲陈云贵杨韶
Owner SICHUAN UNIV
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