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Rare earth hydrogen storage alloy containing Mg and preparing method thereof

A hydrogen storage alloy and rare earth technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of unstable control of alloy composition, deviation between alloy composition and design, low vapor pressure, etc., and achieve easy-to-control production process, simple method, The chemical composition of the alloy is uniform and stable

Inactive Publication Date: 2009-09-09
鞍山鑫普新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the melting points of Mg and Ni are quite different, which are 649°C and 1453°C respectively, and the vapor pressure of Mg is low, if Mg and Ni are melted in the same furnace, Mg will melt and volatilize first, resulting in a deviation of the alloy composition from the design. , so even if the MgNi master alloy is used, the alloy composition cannot be stably controlled

Method used

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  • Rare earth hydrogen storage alloy containing Mg and preparing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The chemical structural formula of magnesium-containing rare earth hydrogen storage alloy is La 0.5 PR 0.1 Nd 0.2 Mg 0.2 (NiCoAlZr) 3.6 .

[0016] Its preparation method is:

[0017] 1) The chemical structural formula La of the designed Mg-containing rare earth hydrogen storage alloy 0.5 PR 0.1 Nd 0.2 Mg 0.2 (NiCoAlZr) 3.6 For batching, the purity of raw materials is greater than 99%.

[0018] 2) Put the rare earth metals, Mg, Ni, Co, Al, and Zr into the vacuum induction melting furnace together, wherein Mg is placed in the auxiliary feeding bin in the furnace, and other metals are directly added into the crucible, and the vacuum is evacuated to 0.5Pa. Stop vacuuming, fill in the inert gas Ar, control the pressure to 0.05MPa, start heating, when all the raw metals are melted evenly, stop heating and cooling;

[0019] 3) After the surface of the alloy melt is formed, add metal Mg and start heating. After the alloy is completely melted and uniform, reduce the g...

Embodiment 2

[0023] The chemical structural formula of magnesium-containing rare earth hydrogen storage alloy is La 0.4 PR 0.2 Nd 0.2 Mg 0.2 (NiCoAlY) 3.6 .

[0024] Its preparation method is:

[0025] 1) The chemical structural formula La of the designed Mg-containing rare earth hydrogen storage alloy 0.4 PR 0.2 Nd 0.2 Mg 0.2 (NiCoAlY) 3.6 For batching, the purity of raw materials is greater than 99%.

[0026] 2) Put rare earth metals, Mg, Ni, Co, Al, and Y into the vacuum induction melting furnace together, among which Mg is first placed in the auxiliary feeding bin in the furnace, and other metals are directly added into the crucible, and the vacuum is evacuated to 0.5Pa , stop vacuuming, fill in the inert gas Ar, control the pressure to 0.07MPa, start heating, when all the raw metals are melted evenly, stop heating and cooling;

[0027] 3) After the surface of the alloy melt is formed, add metal Mg and start heating. After the alloy is completely melted and uniform, reduce t...

Embodiment 3

[0031] The chemical structural formula of magnesium-containing rare earth hydrogen storage alloy is La 0.5 PR 0.2 Nd 0.1 Mg 0.2 (NiCoAlZrFe) 3.4 .

[0032] Its preparation method is:

[0033] 1) The chemical structural formula La of the designed Mg-containing rare earth hydrogen storage alloy 0.5 PR 0.1 Nd 0.2 Mg 0.2 (NiCoAlZrFe) 3.4 For batching, the purity of raw materials is greater than 99%.

[0034] 2) Put rare earth metals, Mg, Ni, Co, Al, and Y into the vacuum induction melting furnace together, among which Mg is first placed in the auxiliary feeding bin in the furnace, and other metals are directly added into the crucible, and the vacuum is evacuated to 0.5Pa , stop vacuuming, fill in the inert gas Ar, control the pressure to 0.04MPa, start heating, when all the raw metals are melted evenly, stop heating and cooling;

[0035] 3) After the surface of the alloy melt is formed, add metal Mg and start heating. After the alloy is completely melted and uniform, re...

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Abstract

The present invention relates to a magnesium-bearing rare earth series hydrogen storage alloy and its preparation method. Its chemical structure formula is La1-X-Y-ZPrXNdYMgZ (NiCoAlM)3.5 plus or minus 0.5. Its preparation method includes the following steps: preparing raw materials according to said chemical structure formula, except for magnesium placing all the metals into a vacuum induction smelting furnace, evacuating to make vacuum degree be less than or equal to 0.5Pa, introducing inert gas, controlling pressure to make the pressure be 0.04-0.07MPa, heating, after all the metals are melted, stopping heating, after the molten alloy surface is film-formed, adding metal magnesium, heating, after all the metals are uniformly melted, stopping heating, reducing gas pressure in the vacuum induction smelting furnace to 0.005-0.04MPa, pouring the molten alloy into a water-cooling mould, cooling and solidifying.

Description

Technical field: [0001] The invention relates to a material for a high-capacity power type MH-Ni battery, belonging to the field of battery materials, in particular to a Mg-containing rare earth hydrogen storage alloy and a preparation method thereof. Background technique: [0002] In recent years, due to the increase of vehicle exhaust emissions, the urban air pollution has become increasingly serious, and the global energy crisis, especially the greenhouse effect, has seriously affected human survival. It has been highly valued by countries all over the world and greatly promoted. The development of MH-Ni battery to high-capacity power type to meet the needs of electric vehicles, hybrid electric vehicles, electric bicycles, electric tools and military tanks, aircraft and submarines, etc., its potential market is very broad. At present, only AB can be used in batches on high-capacity power MH-Ni batteries 5 Rare earth hydrogen storage alloys, other developed alloys, such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02H01M4/38
CPCY02E60/10
Inventor 郭靖洪姜波孙朝林王长春
Owner 鞍山鑫普新材料有限公司
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