CN106702191B - A kind of ferrotianium yttrium base hydrogen storage material and intermediate alloy and preparation method - Google Patents
A kind of ferrotianium yttrium base hydrogen storage material and intermediate alloy and preparation method Download PDFInfo
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- CN106702191B CN106702191B CN201611120723.0A CN201611120723A CN106702191B CN 106702191 B CN106702191 B CN 106702191B CN 201611120723 A CN201611120723 A CN 201611120723A CN 106702191 B CN106702191 B CN 106702191B
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- B22F9/00—Making metallic powder or suspensions thereof
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- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C30/06—Alloys containing less than 50% by weight of each constituent containing zinc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/383—Hydrogen absorbing alloys
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The present invention relates to a kind of Ni-MH power cell ferrotianium yttrium base hydrogen-storing alloy and preparation method, its chemical formula composition is：Ti0.8‑ xMgxY0.3Fe1‑y‑m‑nNiyZnmMnn.X in formula, y, m, n are atomic ratio, 0≤x≤0.2,0≤y≤0.4,0≤m≤0.4,0≤n≤0.4,0≤y+m+n≤0.5, and x+y+m+n ≠ 0.Alloy melting ingot casting under high-purity helium protection, and 10h is heat-treated at 1050 DEG C, it is made again with a certain proportion of nano graphite powder mixing and ball milling after mechanical crushing.The present invention is mainly characterized by using cheap Ti, Fe element in composition design, and cost reduction is existing LaNi5/ 3rd of series hydrogen storage alloy, reversible hydrogen storage amount increase by 30%.In addition, adding the one or more in metal Y and Mg, Ni, Zn, Mn, there is resulting materials PCT curves flat suction to put hydrogen platform, and plateau pressure is reduced in the required pressure range of Ni-MH battery work.Possess room temperature charging and discharging capabilities with nano graphite powder mixing and ball milling resulting materials, maximum discharge capacity reaches 350mAh/g, and dynamic performance is excellent, is suitable for use as new-energy automobile Ni-MH power cell negative material.
Description
Technical field
The invention belongs to hydrogen storage material technical field, more particularly to a kind of Ni-MH power cell stores hydrogen material with ferrotianium yttrium base
Material, intermediate alloy and preparation method.
Background technology
With the increase of the clean energy resourcies such as wind-powered electricity generation, water power proportion in electric power resource, develop new-energy automobile, including
Pure electric vehicle, hybrid power and fuel cell car, have become the environmental problem for solving getting worse, alleviate to petroleum resources mistake
Spend the most effective approach relied on.At present, China becomes the first big new-energy automobile market.According to the number of China Association for Automobile Manufacturers
According to Kuomintang-Communist sells new-energy automobile 331092 in 2015.However, with Japan, compared with European and American developed countries, but only quantity
Advantage, performance and quality are also far apart.Most important deficiency is that power battery performance falls behind, and is mainly manifested in course continuation mileage
Security short, of high cost and poor etc..
At present, domestic main power battery has lithium ion battery and Ni-MH battery.Although market shared by lithium ion battery
Share is larger, but lithium resource is limited, it is difficult to supports lasting, comprehensive new-energy automobile to develop.On fire, the explosion thing frequently occurred
Therefore further increase worry of the people to lithium ion battery safety performance.Filled in contrast, Ni-MH battery possesses fabulous high current
Discharge capability, more meets requirement of the new-energy automobile to rapid charge characteristic.Also, hydrogen is stored in hydrogen-storage alloy in the form of atom
In, its security is that lithium ion battery is incomparable.
The reason for Ni-MH battery market share is relatively low is that existing hydrogen-storage alloy hydrogen storage amount is relatively low, high expensive.At present
Widely used LaNi5Series hydrogen storage alloy, hydrogen storage amount are only 1.3wt.% or so, and service life is about 500 times.Its main component
For the rare earth element and nickel element of higher price, it is difficult to which cost of implementation is greatly reduced.Therefore, Ni-MH battery market competition is lifted
The emphasis of power is the new hydrogen-storage alloy that research and development are cheap, hydrogen storage amount is high.Ferrotitanium-based hydrogen-storage alloy theory hydrogen storage amount is up to
1.86wt.%, after activation at room temperature can reversible suction put hydrogen.But when it is as electrode material, hardly discharge, main cause
Including：(1) pressure of ferrotitanium-based hydrogen-storage alloy-component-temperature (PCT) slope of curve is big, without obvious PCT platforms.Hydrogen work is put in suction
Make pressure and be usually above 0.3MPa.And Ni-MH battery internal pressure is usually no more than 0.1MPa, after the pressure, electricity can be increased
The risk of pond leakage.Three electrode of opening or two electrode systems that the test of hydrogen-storage alloy electrochemistry capacitance uses, operating pressure
For an atmospheric pressure.Therefore, in the Ni-MH battery and three electrodes of opening or two electrode systems of sealing, hydrogen pressure does not reach ferrotianium
Pressure needed for base hydrogen-storing alloy work, so as to cause charge-discharge performance very poor；(2) ferrotitanium-based hydrogen-storage alloy surface charge shifts
Ability is very poor, and electric charge cannot pass through alloy surface in time, and causing hydride to be formed cannot carry out rapidly with decomposition reaction, so that pole
The big performance for limiting alloy discharge capability；(3) titanium in ferrotianium based alloy is easily oxidized to form TiO2, form one layer of cause
Close oxide-film is covered in alloy surface, hinders hydrogen atom and is entered by alloy surface in alloy body, also to a certain extent
Limit the discharge capability of alloy.Based on more than analyze, reduce PCT curve plateau slopes, reduce plateau pressure to 0.1MPa with
Under, it is to improve ferrotitanium-based hydrogen-storage alloy discharge capability to destroy alloy surface oxide layer and improve alloy surface charge transport capability
Key.
It is to improve the important method of alloy hydrogen storage performance with other elements alloying.In the alloy add Mg, Ni, Zn, Mn,
The elements such as Y, can reduce alloy PCT curve plateau slopes.Addition element ratio is adjusted, plateau pressure can be reduced to ni-mh electricity
In the required pressure range of pond work.Heat treatment can eliminate distortion of lattice, increase unit cell volume, put down so as to reduce suction and put hydrogen
Platform pressure.By that can destroy alloy surface oxide layer with a small amount of nano graphite powder mixing and ball milling, increase alloy surface electric charge turns
Shifting ability, greatly improves the discharge performance of alloy.The present invention is using vacuum casting+heat treatment+and nano graphite powder short time
The technique of ball milling prepares the ferrotianium yttrium base hydrogen storage material with single phase structure, and room temperature discharge capacity is greatly improved, into
Originally it is reduced to LaNi5/ 3rd of series hydrogen storage alloy.
The content of the invention
It is an object of the invention to provide a kind of Ni-MH power cell ferrotianium yttrium base hydrogen storage material and intermediate alloy, make titanium
Discharge capability substantially improves iron-based hydrogen-storage alloy at room temperature.
Another object of the present invention is to provide a kind of preparation method of Ni-MH power cell ferrotianium yttrium base hydrogen storage material.
To achieve the above object, technical scheme is as follows：
A kind of intermediate alloy for preparing ferrotianium yttrium base hydrogen storage material, the hydrogen storage material are used for Ni-MH power cell, among this
The chemical formula of alloy forms：Ti0.8-xMgxY0.3Fe1-y-m-nNiyZnmMnn, x, y, m in formula, n is atomic ratio, 0≤x≤0.2,0
≤ y≤0.4,0≤m≤0.4,0≤n≤0.4,0≤y+m+n≤0.5, and x+y+m+n ≠ 0.
The intermediate alloy into being grouped into：Ti0.65Mg0.15Y0.3Fe0.5Ni0.3Zn0.1Mn0.1。
The intermediate alloy is nanocrystalline and amorphous structure.
A kind of ferrotianium yttrium base hydrogen storage material, the hydrogen storage material are used for Ni-MH power cell, and the hydrogen storage material is by the titanium for preparing
Iron yttrium base intermediate alloy and nano graphite powder composition, nano graphite powder accounting is 1-10wt.%, remaining is the intermediate alloy,
The chemical formula of the intermediate alloy forms：Ti0.8-xMgxY0.3Fe1-y-m-nNiyZnmMnn, x, y, m in formula, n is atomic ratio, 0≤
X≤0.2,0≤y≤0.4,0≤m≤0.4,0≤n≤0.4,0≤y+m+n≤0.5, and x+y+m+n ≠ 0；
The hydrogen storage material is made by the steps：Vacuum casting → heat treatment → and nano graphite powder short time ball milling.
The hydrogen storage material surface is embedded with highdensity nano-graphite particle.
The discharge capacity of the hydrogen storage material is 266~350mAh/g.
A kind of ferrotianium yttrium base process for preparing hydrogen-bearing as mentioned, this method comprises the following steps：
A. formed by chemical formula：Ti0.8-xMgxY0.3Fe1-y-m-nNiyZnmMnnRaw material are weighed, x, y, m in formula, n is atom
Than, 0≤x≤0.2,0≤y≤0.4,0≤m≤0.4,0≤n≤0.4,0≤y+m+n≤0.5, and x+y+m+n ≠ 0；
B. the raw material prepared are piled up in crucible in order；
C. vacuum melting：Under high-purity helium protective atmosphere, it is 1670-1710 DEG C of progress induction melting in smelting temperature, obtains
The intermediate alloy ingot casting of ferrotianium yttrium base hydrogen storage material must be used to prepare；
D. vacuum heat：Gained intermediate alloy ingot casting is carried out eliminating defect and segregation is heat-treated；
E. sphere of powder mill processed：Gained intermediate alloy in step d is pulverized and is mixed with the nano graphite powder of 1-10wt.%
Short time ball milling is carried out after uniformly, total Ball-milling Time is in 1-5h.
In step a, raw material metal purity >=99%, the magnesium metal during the chemical formula forms increases in proportioning
The scaling loss amount of 10wt.%.
In step b, the raw material prepared is placed in crucible, arrangement of each raw material in crucible is：Iron staff perpendicular to
Crucible bottom is put along crucible wall circular；The nickel plate for being cut to fritter is laid in crucible bottom, and tile titanium sponge, zinc successively thereon
Block and manganese block, above raw material should fill up crucible；Bulk magnesium is selected to be placed in the superiors, present position should be higher than that edge on crucible.
In step c, 1 × 10 is evacuated to-3More than Pa, is then charged with 0.06MPa high-purity heliums as protection gas, is felt
Answer melting.
It is in step d, intermediate alloy ingot casting is layered stacked in heat-treatment furnace, it is evacuated to 1 × 10-3Pa, and 1050
10h, furnace cooling are heat-treated at DEG C.
In step e, the ratio of grinding media to material of ball-milling technology is 20:1, setting speed 350r/min, using ball milling 0.5h, rest
The pattern of 10min carries out ball milling.
The beneficial effects of the present invention are：
(1) relative to traditional LaNi5Series hydrogen storage alloy, is made in composition design using cheap Ti, Fe element
For essential element.Wherein two kinds of element rich reserves in nature of Ti, Fe, it is cheap, be conducive to large-scale promotion application.
Prepared ferrotianium yttrium base hydrogen storage material cost is only LaNi5/ 3rd of series hydrogen storage alloy.
(2) the reversible hydrogen storage amount of ferrotianium yttrium base hydrogen storage material prepared by has brought up to 1.8wt.%, compared with LaNi5System's storage hydrogen closes
Gold improves 30%, also apparently higher than the TiFe base hydrogen-storing alloys having reported.
(3) relative to traditional ferrotitanium-based hydrogen-storage material, added in prepared ferrotianium yttrium base hydrogen storage material suitable
Mg, Ni, Zn, Mn element, increase unit cell volume, alloy is had flat PCT platforms.Also, PCT curve plateau pressure drops
It is low to have arrived below 0.1MPa, so as to meet requirement of the Ni-MH battery to negative material performance.
(4) ferrotianium yttrium base hydrogen storage material PCT plateau pressures prepared by are in 0.05-0.097MPa, higher than most
LaNi5Series hydrogen storage alloy, therefore, possesses more excellent dynamic performance, is particularly suited for vehicle-mounted Ni-MH power cell anode
Material.
(5) preparation process of vacuum casting+heat treatment+and graphite short time ball milling used by, melts relative to traditional
Casting+heat treatment process, or founding+fast quenching+heat treatment process, are particularly suited for the system of ferrotianium yttrium base hydrogen-storing alloy electrode material
It is standby.Prepared ferrotianium yttrium base storage hydrogen intermediate alloy has nanocrystalline+amorphous structure structure.Intermediate alloy is mixed with nano graphite powder
After closing ball milling, alloying pellet surface is embedded with highdensity nano-graphite particle, improves charge transport capability, is the storage of ferrotianium yttrium base
Hydrogen absorbing alloy electrode material possesses the key of fast charging and discharging ability.The maximum electric discharge of ferrotianium yttrium base hydrogen storage material prepared by the technique
Capacity increases to 350mAh/g, far above it has been reported that ferrotitanium-based hydrogen-storage alloy, exceeded LaNi5Series hydrogen storage alloy is most
Big actual discharge capacity, possesses practical prospect.
Brief description of the drawings
Fig. 1 is the Ti of comparative example 11.1The TEM micro-structure diagrams of Fe intermediate alloys；
Fig. 2 is the Ti of comparative example 11.1The nano graphite powder mixing and ball milling 3h resulting materials of Fe intermediate alloys and 5wt.%
TEM micro-structure diagrams；
Fig. 3 is the Ti of the embodiment of the present invention 130.65Mg0.15Y0.3Fe0.7Ni0.3The TEM micro-structure diagrams of intermediate alloy；
Fig. 4 is the Ti of the embodiment of the present invention 130.65Mg0.15Y0.3Fe0.7Ni0.3The nano graphite powder of intermediate alloy and 5wt.%
The TEM micro-structure diagrams of mixing and ball milling 3h resulting materials；
Fig. 5 is the Ti of the embodiment of the present invention 130.65Mg0.15Y0.3Fe0.7Ni0.3The SEM granule-morphology figures of intermediate alloy；
Fig. 6 is the Ti of the embodiment of the present invention 130.65Mg0.15Y0.3Fe0.7Ni0.3The nano graphite powder of intermediate alloy and 5wt.%
The SEM granule-morphology figures of mixing and ball milling 3h resulting materials.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.
The mentality of designing of the present invention is as follows：
In terms of composition design, Ti, Fe, Y is selected mainly to be formed as alloy, while must also add in Mg, Ni, Zn, Mn
One kind.GIFe unit cell volumes are increased by the addition of Y, alloy is possessed flat PCT platforms.Pass through Mg, Ni, Zn, Mn
Add reduction plateau pressure and improve the charge transport capability of alloy.
In terms of preparation method, the present invention is using vacuum casting → heat treatment → and the technique of nano graphite powder short time ball milling
Ferrotianium yttrium base hydrogen storage material is prepared, which obtains the alloy cast ingot of traditional crystalline structure through vacuum melting, then at 1050 DEG C
It is heat-treated 10h and eliminates defect and segregation, the ball milling of short time is carried out with nano graphite powder after Mechanical Crushing is made.This method passes through
Heat treatment reduce further the suction hydrogen desorption plateau pressure of PCT, and make being embedded in for nano-graphite grained high density by ball milling
Alloy surface, greatly improves the charge transport capability on electrode metal surface.
The Ni-MH power cell of the present invention stores hydrogen intermediate alloy with ferrotianium yttrium base, is made of metal Ti, Fe, Y, in addition, also
Including at least one of Mg, Ni, Zn, Mn, its chemical formula composition is：Ti0.8-xMgxY0.3Fe1-y-m-nNiyZnmMnn+ z%C..
X in formula, y, m, n are atomic ratio, 0≤x≤0.2,0≤y≤0.4,0≤m≤0.4,0≤n≤0.4,0≤y+m+n≤0.5, and x
+y+m+n≠0.It is preferred that atomic ratio is x=0.15, y=0.3, m=0.1, n=0.1.C is nano graphite powder, and z is quality percentage
Than, 1≤z≤10, optimum addition z=5.
The Ni-MH power cell preparation method of ferrotianium yttrium base hydrogen storage material of the present invention, comprises the following steps：
A. formed by chemical formula：Ti0.8–xMgxY0.3Fe1-y-m-nNiyZnmMnnRaw material are weighed, x, y, m in formula, n is atom
Than, 0≤x≤0.2,0≤y≤0.4,0≤m≤0.4,0≤n≤0.4,0≤y+m+n≤0.5, and x+y+m+n ≠ 0.It is it is preferred that former
Sub- ratio is x=0.15, y=0.3, m=0.1, n=0.1.Magnesium in the chemical formula increases the scaling loss of 10wt.% in proportioning
Amount.
B. the raw material prepared are piled up in crucible in order.Iron staff is put perpendicular to crucible bottom along crucible wall circular
Put.The nickel plate for being cut to fritter is laid in crucible bottom, and tile titanium sponge, spelter and manganese block successively thereon, and above raw material should
Fill up crucible.Bulk magnesium is selected to be placed in the superiors, present position should be higher than that edge on crucible, to shorten the melting time of magnesium as far as possible,
Reduce scaling loss amount.
C. vacuum induction heats.200KW power first is passed to induction coil, raw material are preheated.Utilize machine at the same time
Tool pump, lobe pump, diffusion pump carry out three-level to intermediate frequency vaccum sensitive stove and vacuumize, and vacuum is 1 × 10-3-5×10-4Pa.Reach
To after above-mentioned vacuum, apply the high-purity helium of 0.01-0.1MPa pressure as protection gas.Treat that furnace pressure reaches setting value
Afterwards, coil power is adjusted to maximum to accelerate raw material to melt, melting temperature is 1670-1710 DEG C.Magnesium is melted in lower floor's raw material
Fallen into after change in crucible, rapid fusing.Molten state Ti0.8-xMgxY0.3Fe1-y-m-nNiyZnmMnnAlloy is cast to long 15cm immediately,
In the water cooled copper mould of diameter 3cm, alloy of ingot is obtained.
D. vacuum heat.There are element segregation, especially magnesium elements in gained alloy of ingot.Gained ingot casting is layered code
It is placed in heat-treatment furnace, is evacuated to 1 × 10-3Pa, and 10h, furnace cooling are heat-treated at 1050 DEG C.
E. gained ferrotianium yttrium base hydrogen-storing alloy milling in step d is mixed with the nano graphite powder of 1-10wt.% and be put into not
In steel ball grinding jar of becoming rusty.Add certain mass than stainless steel quench abrading-ball, ratio of grinding media to material 20:1, high-purity argon gas is filled with as protection
Gas.Setting speed is 350r/min.Using ball milling 0.5h, the pattern of rest 10min starts ball milling, and total Ball-milling Time is in 1-5h.
Optimal graphite additive amount is 5wt.%, and optimal Ball-milling Time is 3h.Take out powder sieving after ball milling to weigh, whole operation process is all
Carried out in the vacuum glove box full of high-purity argon gas, avoid aoxidizing with air contact, and sealed with vacuum packing machine.
Comparative example 1
Ferrotitanium-based hydrogen-storage alloy Ti1.1Fe weighs raw material 2Kg by mass percentage, and metal simple-substance is pure used in experiment
Degree is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, is evacuated to 1 × 10-3Pa, then apply
Add 0.06MPa high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to maximum to accelerate raw material to melt,
Melting temperature is 1690 DEG C.Molten state alloy is cast to a length of 15cm immediately, in the water cooled copper mould of a diameter of 3cm.Among as cast condition
Alloy heterogeneous microstructure tem observation, as shown in Figure 1.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained closes
Gold through Mechanical Crushing, after pulverizing with the nano graphite powder of 5wt.% under 350r/min rotating speeds mixing and ball milling 3h.After ball milling
Alloy heterogeneous microstructure tem observation, as shown in Figure 2.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 1
Ferrotianium yttrium base hydrogen-storing alloy Ti0.75Mg0.05Y0.3Fe weighs raw material 2Kg, gold used in experiment by mass percentage
Belong to the purity of simple substance more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, it is evacuated to 1 ×
10-3Pa, then apply 0.06MPa pressure helium.After furnace pressure reaches setting value, coil power is adjusted to maximum to accelerate original
Material melts, and melting temperature is 1688 DEG C.Molten state alloy is cast to a length of 15cm immediately, in the water cooled copper mould of a diameter of 3cm.
Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy through Mechanical Crushing, after pulverizing with the nanometer stone of 5wt.%
Ink powder mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 2
Ferrotianium yttrium base hydrogen-storing alloy Ti0.7Mg0.1Y0.3Fe weighs raw material 2Kg, metal used in experiment by mass percentage
The purity of simple substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, it is evacuated to 1 ×
10-3Pa, then apply 0.06MPa pressure helium.After furnace pressure reaches setting value, coil power is adjusted to maximum to accelerate original
Material melts, and melting temperature is 1688 DEG C.Molten state alloy is cast to a length of 15cm immediately, in the water cooled copper mould of a diameter of 3cm.
Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy through Mechanical Crushing, after pulverizing with the nanometer stone of 5wt.%
Ink powder mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 3
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe weighs raw material 2Kg, gold used in experiment by mass percentage
Belong to the purity of simple substance more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, it is evacuated to 1 ×
10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to maximum to add
Fast raw material fusing, melting temperature are 1670 DEG C.Molten state alloy is cast to a length of 15cm, the water-cooled copper of a diameter of 3cm immediately
In mould.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy is through Mechanical Crushing, with 5wt.%'s after pulverizing
Nano graphite powder mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 4
Ferrotianium yttrium base hydrogen-storing alloy Ti0.6Mg0.2Y0.3Fe weighs raw material 2Kg, metal used in experiment by mass percentage
The purity of simple substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, it is evacuated to 1 ×
10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to maximum to add
Fast raw material fusing, melting temperature are 1680 DEG C.Molten state alloy is cast to a length of 15cm, the water-cooled copper of a diameter of 3cm immediately
In mould.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy is through Mechanical Crushing, with 5wt.%'s after pulverizing
Nano graphite powder mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 5
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe weighs raw material 2Kg, gold used in experiment by mass percentage
Belong to the purity of simple substance more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, it is evacuated to 1 ×
10-3Pa, then apply 0.04MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to maximum to add
Fast raw material fusing, melting temperature are 1672 DEG C.Molten state alloy is cast to a length of 15cm, the water-cooled copper of a diameter of 3cm immediately
In mould.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy is through Mechanical Crushing, with 1wt.%'s after pulverizing
Nano graphite powder mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 6
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe weighs raw material 2Kg, gold used in experiment by mass percentage
Belong to the purity of simple substance more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, it is evacuated to 1 ×
10-3Pa, then apply 0.04MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to maximum to add
Fast raw material fusing, melting temperature are 1670 DEG C.Molten state alloy is cast to a length of 15cm, the water-cooled copper of a diameter of 3cm immediately
In mould.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy is through Mechanical Crushing, with 3wt.%'s after pulverizing
Nano graphite powder mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 7
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe weighs raw material 2Kg, gold used in experiment by mass percentage
Belong to the purity of simple substance more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, it is evacuated to 1 ×
10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to maximum to add
Fast raw material fusing, melting temperature are 1674 DEG C.Molten state alloy is cast to a length of 15cm, the water-cooled copper of a diameter of 3cm immediately
In mould.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy is through Mechanical Crushing, with 10wt.%'s after pulverizing
Nano graphite powder mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 8
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe weighs raw material 2Kg, gold used in experiment by mass percentage
Belong to the purity of simple substance more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, it is evacuated to 1 ×
10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to maximum to add
Fast raw material fusing, melting temperature are 1670 DEG C.Molten state alloy is cast to a length of 15cm, the water-cooled copper of a diameter of 3cm immediately
In mould.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy is through Mechanical Crushing, with 5wt.%'s after pulverizing
Nano graphite powder mixing and ball milling 1h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 9
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe weighs raw material 2Kg, gold used in experiment by mass percentage
Belong to the purity of simple substance more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, it is evacuated to 1 ×
10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to maximum to add
Fast raw material fusing, melting temperature are 1687 DEG C.Molten state alloy is cast to a length of 15cm, the water-cooled copper of a diameter of 3cm immediately
In mould.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy is through Mechanical Crushing, with 5wt.%'s after pulverizing
Nano graphite powder mixing and ball milling 5h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 10
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.7Ni0.3Raw material 2Kg is weighed by mass percentage, and experiment is made
The purity of metal simple-substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, is taken out true
It is empty to 1 × 10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to
For maximum to accelerate raw material to melt, melting temperature is 1685 DEG C.Molten state alloy is cast to a length of 15cm, a diameter of 3cm immediately
Water cooled copper mould in.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy through Mechanical Crushing, after pulverizing with
The nano graphite powder of 5wt.% mixing and ball milling 10h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 11
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.9Ni0.1Raw material 2Kg is weighed by mass percentage, and experiment is made
The purity of metal simple-substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, is taken out true
It is empty to 1 × 10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to
For maximum to accelerate raw material to melt, melting temperature is 1682 DEG C.Molten state alloy is cast to a length of 15cm, a diameter of 3cm immediately
Water cooled copper mould in.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy through Mechanical Crushing, after pulverizing with
The nano graphite powder of 5wt.% mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 12
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.8Ni0.2Raw material 2Kg is weighed by mass percentage, and experiment is made
The purity of metal simple-substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, is taken out true
It is empty to 1 × 10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to
For maximum to accelerate raw material to melt, melting temperature is 1679 DEG C.Molten state alloy is cast to a length of 15cm, a diameter of 3cm immediately
Water cooled copper mould in.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy through Mechanical Crushing, after pulverizing with
The nano graphite powder of 5wt.% mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 13
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.7Ni0.3Raw material 2Kg is weighed by mass percentage, and experiment is made
The purity of metal simple-substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, is taken out true
It is empty to 1 × 10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to
For maximum to accelerate raw material to melt, melting temperature is 1684 DEG C.Molten state alloy is cast to a length of 15cm, a diameter of 3cm immediately
Water cooled copper mould in.As cast condition intermediate alloy heterogeneous microstructure tem observation, as shown in Figure 3.Gained ingot casting is at 1050 DEG C
Carry out heat treatment 10h.Gained alloy is through Mechanical Crushing, and the nano graphite powder of 5wt.% is under 350r/min rotating speeds after pulverizing
Mixing and ball milling 3h.Alloy heterogeneous microstructure tem observation after ball milling, as shown in Figure 4.Alloy surface pattern is used before ball milling
SEM is observed, as shown in Figure 5.Alloy surface pattern is as shown in Figure 6 after ball milling.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 14
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.6Ni0.4Raw material 2Kg is weighed by mass percentage, and experiment is made
The purity of metal simple-substance is more than 99%.Above-mentioned raw materials are cleaned to be placed on vacuum induction melting furnace, it is evacuated to 1 ×
10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to maximum to add
Fast raw material fusing, melting temperature are 1681 DEG C.Molten state alloy is cast to a length of 15cm, the water-cooled copper of a diameter of 3cm immediately
In mould.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy is through Mechanical Crushing, with 5wt.%'s after pulverizing
Nano graphite powder mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 15
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.9Mn0.1Raw material 2Kg is weighed by mass percentage, and experiment is made
The purity of metal simple-substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, is taken out true
It is empty to 1 × 10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to
For maximum to accelerate raw material to melt, melting temperature is 1681 DEG C.Molten state alloy is cast to a length of 15cm, a diameter of 3cm immediately
Water cooled copper mould in.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy through Mechanical Crushing, after pulverizing with
The nano graphite powder of 5wt.% mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 16
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.8Mn0.2Raw material 2Kg is weighed by mass percentage, and experiment is made
The purity of metal simple-substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, is taken out true
It is empty to 1 × 10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to
For maximum to accelerate raw material to melt, melting temperature is 1685 DEG C.Molten state alloy is cast to a length of 15cm, a diameter of 3cm immediately
Water cooled copper mould in.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy through Mechanical Crushing, after pulverizing with
The nano graphite powder of 5wt.% mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 17
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.7Mn0.3Raw material 2Kg is weighed by mass percentage, and experiment is made
The purity of metal simple-substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, is taken out true
It is empty to 1 × 10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to
For maximum to accelerate raw material to melt, melting temperature is 1678 DEG C.Molten state alloy is cast to a length of 15cm, a diameter of 3cm immediately
Water cooled copper mould in.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy through Mechanical Crushing, after pulverizing with
The nano graphite powder of 5wt.% mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 18
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.6Mn0.4Raw material 2Kg is weighed by mass percentage, and experiment is made
The purity of metal simple-substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, is taken out true
It is empty to 1 × 10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to
For maximum to accelerate raw material to melt, melting temperature is 1678 DEG C.Molten state alloy is cast to a length of 15cm, a diameter of 3cm immediately
Water cooled copper mould in.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy through Mechanical Crushing, after pulverizing with
The nano graphite powder of 5wt.%, the ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 19
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.9Zn0.1Raw material 2Kg is weighed by mass percentage, and experiment is made
The purity of metal simple-substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, is taken out true
It is empty to 1 × 10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to
For maximum to accelerate raw material to melt, melting temperature is 1683 DEG C.Molten state alloy is cast to a length of 15cm, a diameter of 3cm immediately
Water cooled copper mould in.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy through Mechanical Crushing, after pulverizing with
The nano graphite powder of 5wt.% mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 20
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.8Zn0.2Raw material 2Kg is weighed by mass percentage, and experiment is made
The purity of metal simple-substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, is taken out true
It is empty to 1 × 10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to
For maximum to accelerate raw material to melt, melting temperature is 1686 DEG C.Molten state alloy is cast to a length of 15cm, a diameter of 3cm immediately
Water cooled copper mould in.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy through Mechanical Crushing, after pulverizing with
The nano graphite powder of 5wt.% mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 21
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.7Zn0.3Raw material 2Kg is weighed by mass percentage, and experiment is made
The purity of metal simple-substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, is taken out true
It is empty to 1 × 10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to
For maximum to accelerate raw material to melt, melting temperature is 1685 DEG C.Molten state alloy is cast to a length of 15cm, a diameter of 3cm immediately
Water cooled copper mould in.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy through Mechanical Crushing, after pulverizing with
The nano graphite powder of 5wt.% mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 22
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.6Zn0.4Raw material 2Kg is weighed by mass percentage, and experiment is made
The purity of metal simple-substance is more than 99%.Above-mentioned raw materials are cleaned to be placed in vacuum induction melting furnace crucible, is taken out true
It is empty to 1 × 10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, coil power is adjusted to
For maximum to accelerate raw material to melt, melting temperature is 1685 DEG C.Molten state alloy is cast to a length of 15cm, a diameter of 3cm immediately
Water cooled copper mould in.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy through Mechanical Crushing, after pulverizing with
The nano graphite powder of 5wt.% mixing and ball milling 3h under 350r/min rotating speeds.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
Embodiment 23
Ferrotianium yttrium base hydrogen-storing alloy Ti0.65Mg0.15Y0.3Fe0.5Ni0.3Zn0.1Mn0.1Raw material 2Kg is weighed by mass percentage,
The purity of metal simple-substance used in experiment is more than 99%.Above-mentioned raw materials are cleaned to be placed on vacuum induction melting furnace crucible
In, it is evacuated to 1 × 10-3Pa, then apply 0.06MPa pressure high-purity heliums.After furnace pressure reaches setting value, by coil work(
Rate is adjusted to maximum to accelerate raw material to melt, and melting temperature is 1683 DEG C.Molten state alloy is cast to a length of 15cm, diameter immediately
For in the water cooled copper mould of 3cm.Gained ingot casting carries out heat treatment 10h at 1050 DEG C.Gained alloy is pulverized through Mechanical Crushing
Afterwards with the nano graphite powder of 5wt.% under 350r/min rotating speeds mixing and ball milling 3h.Hydrogen sucting platform pressure and electrochemistry capacitance are shown in Table 1.
The performance of 1 embodiment of table and comparative example alloy
Test result shows that there is the PCT curves of alloy of the present invention flat suction to put hydrogen platform, and plateau pressure is reduced to nickel
In the required pressure range of hydrogen battery work.Ferrotianium yttrium base hydrogen storage material possesses room temperature charging and discharging capabilities made from the technique,
Maximum discharge capacity reaches 350mAh/g, possesses excellent dynamic performance, is suitable for use as new-energy automobile Ni-MH power cell and bears
Pole material.
Claims (11)
1. a kind of intermediate alloy for preparing ferrotianium yttrium base hydrogen storage material, the hydrogen storage material are used for Ni-MH power cell, its feature exists
In：
The chemical formula of the intermediate alloy forms：Ti0.8-xMgxY0.3Fe1-y-m-nNiyZnmMnn, x, y, m in formula, n is atomic ratio, 0
≤ x≤0.2,0≤y≤0.4,0≤m≤0.4,0≤n≤0.4,0≤y+m+n≤0.5, and x+y+m+n ≠ 0, the intermediate alloy
For nanocrystalline and amorphous structure.
2. intermediate alloy according to claim 1, it is characterised in that：
The intermediate alloy into being grouped into：Ti0.65Mg0.15Y0.3Fe0.5Ni0.3Zn0.1Mn0.1。
3. a kind of ferrotianium yttrium base hydrogen storage material, the hydrogen storage material are used for Ni-MH power cell, it is characterised in that：
The hydrogen storage material is made of the ferrotianium yttrium base intermediate alloy and nano graphite powder prepared, and nano graphite powder accounting is 1-
10wt.%, remaining is the intermediate alloy, and the chemical formula composition of the intermediate alloy is：Ti0.8-xMgxY0.3Fe1-y-m- nNiyZnmMnn, x, y, m in formula, n is atomic ratio, 0≤x≤0.2,0≤y≤0.4,0≤m≤0.4,0≤n≤0.4,0≤y+m+
N≤0.5, and x+y+m+n ≠ 0；
The hydrogen storage material is made by the steps：Vacuum casting → heat treatment → and nano graphite powder short time ball milling.
4. ferrotianium yttrium base hydrogen storage material as claimed in claim 3, it is characterised in that：
The hydrogen storage material surface is embedded with highdensity nano-graphite particle.
5. ferrotianium yttrium base hydrogen storage material according to claim 3, it is characterised in that：
The discharge capacity of the hydrogen storage material is 266~350mAh/g.
A kind of 6. ferrotianium yttrium base process for preparing hydrogen-bearing as claimed in claim 3, it is characterised in that：
This method comprises the following steps：
A. formed by chemical formula：Ti0.8-xMgxY0.3Fe1-y-m-nNiyZnmMnnRaw material are weighed, x, y, m in formula, n is atomic ratio, 0
≤ x≤0.2,0≤y≤0.4,0≤m≤0.4,0≤n≤0.4,0≤y+m+n≤0.5, and x+y+m+n ≠ 0；
B. the raw material prepared are piled up in crucible in order；
C. vacuum melting：Under high-purity helium protective atmosphere, it is 1670-1710 DEG C of progress induction melting in smelting temperature, is used
In the intermediate alloy ingot casting for preparing ferrotianium yttrium base hydrogen storage material；
D. vacuum heat：Gained intermediate alloy ingot casting is carried out eliminating defect and segregation is heat-treated；
E. sphere of powder mill processed：Gained intermediate alloy in step d is pulverized and is uniformly mixed with the nano graphite powder of 1-10wt.%
Short time ball milling is carried out afterwards, and total Ball-milling Time is in 1-5h.
7. Ni-MH power cell according to claim 6 ferrotianium yttrium base process for preparing hydrogen-bearing, it is characterised in that：
In step a, raw material metal purity >=99%, the magnesium metal during the chemical formula forms increases 10wt.% in proportioning
Scaling loss amount.
8. Ni-MH power cell according to claim 6 ferrotianium yttrium base process for preparing hydrogen-bearing, it is characterised in that：
In step b, the raw material prepared is placed in crucible, arrangement of each raw material in crucible is：Iron staff is perpendicular to crucible
Put along crucible wall circular bottom；The nickel plate for being cut to fritter is laid in crucible bottom, thereon successively tile titanium sponge, spelter and
Manganese block, above raw material should fill up crucible；Bulk magnesium is selected to be placed in the superiors, present position should be higher than that edge on crucible.
9. Ni-MH power cell according to claim 6 ferrotianium yttrium base process for preparing hydrogen-bearing, it is characterised in that：
In step c, 1 × 10 is evacuated to-3More than Pa, is then charged with 0.06MPa high-purity heliums as protection gas, it is molten to carry out sensing
Refining.
10. Ni-MH power cell according to claim 6 ferrotianium yttrium base process for preparing hydrogen-bearing, it is characterised in that：
It is in step d, intermediate alloy ingot casting is layered stacked in heat-treatment furnace, it is evacuated to 1 × 10-3Pa, and at 1050 DEG C
It is heat-treated 10h, furnace cooling.
11. Ni-MH power cell according to claim 6 ferrotianium yttrium base process for preparing hydrogen-bearing, it is characterised in that：
In step e, the ratio of grinding media to material of ball-milling technology is 20:1, setting speed 350r/min, using ball milling 0.5h, rest 10min
Pattern carry out ball milling.
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