CN106946567B - A kind of intermetallic Fe-Al compound and ZrO2The preparation method of composite diphase material mobile phone pottery backboard - Google Patents

A kind of intermetallic Fe-Al compound and ZrO2The preparation method of composite diphase material mobile phone pottery backboard Download PDF

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CN106946567B
CN106946567B CN201710142270.XA CN201710142270A CN106946567B CN 106946567 B CN106946567 B CN 106946567B CN 201710142270 A CN201710142270 A CN 201710142270A CN 106946567 B CN106946567 B CN 106946567B
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周涛
沈同德
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Anhui Tongwan Technology Co.,Ltd.
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
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    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
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    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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Abstract

The invention discloses a kind of intermetallic Fe-Al compound and ZrO2The preparation method of composite diphase material mobile phone pottery backboard, this method are by Fe3Al intermetallic compound and ZrO2Granulation sintering obtains composite diphase material after grinding is blended.The composite material utilizes the comparable characteristic combination Fe of the two linear expansion coefficient3The excellent fracture toughness of Al intermetallic compound and ZrO2The characteristic of good bending strength and high rigidity, in addition excessive metal can be used as sintering aid, densify it can in normal pressure-sintered furnace, and sintering aid fills up the microscopic defects such as composite diphase material Hole, crackle, optimize mechanical property, segmented cooling cooling technique is not only by ZrO in composite diphase material2The problem of high-temperature-phase is saved in room temperature, improves its toughening effect, reduces residual stress release cracking in composite diphase material cooling procedure, improves the yield of sintering ceramics, while zirconium oxide usage amount reduces in composite diphase material, pottery backboard overall cost reduces.

Description

A kind of intermetallic Fe-Al compound and ZrO2The preparation of composite diphase material mobile phone pottery backboard Method
Technical field
The present invention relates to structural ceramics preparation field, in particular to a kind of intermetallic Fe-Al compound and ZrO2Composite diphase material Mobile phone pottery backboard preparation method.
Background technique
In recent years, with the fast development of the consumer electronics such as mobile phone, the structural members such as mobile phone backboard achieve significant progress. The especially design requirement driving of following 5G epoch consumer electronics backboard, traditional metal shell and plastic shell are difficult to full Sufficient consumption demand, therefore there is an urgent need to new material and preparation processes.
Due to ZrO2Ceramics have high obdurability, good hardness, high-wearing feature, are widely used in structural ceramics With function ceramics field.Also have been reported that partially stabilized zirconia (TZP) can prepare corrosion resistant by powder metallurgy process Wristwatch case, table part and Other Instruments part.Therefore in recent years, it is applied to phone housing also more and more by researcher It is attempted.Such as application No. is use to add aluminium oxide, titanium oxide in zirconium oxide main phase in 201510309285.1 patent Equal additives prepare phone housing by the way of curtain coating.In another example application No. is use yttrium in 201510940002.3 patent Stable zirconia ceramics powder and organic matter mixing extrusion shaping mobile phone shell.It is reported that thanking to " structural ceramics " one of will roc work Book introduces the best ZrO of toughening performance commercial at present2Ceramic fracture toughness is also only 8~12MPa.m1/2.Outside current metal The structural members such as shell are compared to still relatively low, and cause to have the following problems: 1) drop resistant degree is still bad；2) high speed machining yield is inclined Low, low speed machining cost is higher.In addition there are phase transformation agings to show for yttrium partially stabilized zirconium oxide, repeatedly falls and hits in use process It with high temperature variation is likely to that structural member is caused to fail, while to prepare cost of material higher for yttrium partially stabilized zirconia ceramics And limit its large-scale application problem.The present invention utilizes Fe-Al intermetallic and ZrO2It is basic in each temperature section linear expansion coefficient Unanimously, the composite material for developing metal and ceramics, effectively raises the fracture toughness and drop resistant performance of ceramic product.
Summary of the invention
In view of this, in view of the deficiencies of the prior art, the present invention aims to provide between a kind of iron aluminum metal Compound and ZrO2Composite diphase material mobile phone pottery backboard preparation method, this method are by Fe3Al intermetallic compound and ZrO2It is blended It is granulated sintering after grinding and obtains composite diphase material.The composite material combines Fe3The excellent fracture toughness of Al intermetallic compound and ZrO2The characteristic of good bending strength and high rigidity, the composite diphase material comprehensive mechanical property of preparation are excellent.In addition in design of material Single metal deviates Fe in the process3Al molar ratio, excessive metal can be used as sintering aid, reduce the densification of the composite diphase material Condition, so that can be densified in normal pressure-sintered furnace, and sintering aid can fill up composite diphase material Hole, crackle etc. Microscopic defect further increases composite materials property.
To achieve the above object, the present invention is using following technical solution: a kind of intermetallic Fe-Al compound and ZrO2It is multiple Phase material mobile phone pottery backboard preparation method, comprising the following steps:
A) by mole Fe:Al=(71~77): (23~29) weigh iron powder and aluminium powder molten alloy, in indifferent gas Atmosphere environment mesohigh prepares intermetallic Fe-Al compound powder by spraying；
B) will obtain in the stable Zirconium oxide powder of yttrium and step a) intermetallic Fe-Al compound powder by weight (60~ 90): (10~40) are weighed into grinding pot, the use of alcohol or water are abrasive media, and grinding 18h~for 24 hours, it obtains mixing and grinds Be milled body；
C) the mixed grinding powder high-energy ball milling 3h~5h for obtaining step b)；
D) it will be granulated to obtain pelletizing by the mixed grinding powder of step c) processing；
E) step d) is obtained into pelletizing after dry-pressing formed isostatic cool pressing is handled under the pressure of 200MPa~250MPa again Obtain isostatic cool pressing green body；
F) step e) is obtained into isostatic cool pressing green body numerically-controlled machine tool machining and shaping and obtains mobile phone pottery backboard green body；
G) step e) mobile phone pottery backboard green body is obtained to be sintered under vacuum or inert atmosphere and cooling.
Preferably, the Fe:Al=(71~75): (25~29) in step a).
Preferably, the Fe:Al=(74~75): (25~26) in step a).
Preferably, inert gas is Ar gas in step a), and air pressure is 0.3MPa~0.5MPa.
Preferably, yttrium stable zirconium oxide powder and the weight percent of intermetallic Fe-Al compound powder are in step b) (70~90): (10~30).
Preferably, yttrium stable zirconium oxide powder and the weight percent of intermetallic Fe-Al compound powder are in step b) (85~90): (10~15).
Preferably, step d) is mist projection granulating.
Preferably, vacuum degree is -0.095MPa~-0.099MPa in step g), and inert atmosphere is Ar gas.
Preferably, sintering temperature is 1400 DEG C~1600 DEG C in step g), and the heat preservation sintering time is 2h~5h.
Preferably, step g) cooling technique be 1200 DEG C or more rate of temperature fall be not higher than 1 DEG C/min, 1200 DEG C~ 800 DEG C of rate of temperature fall are not less than 50 DEG C/min, 800 DEG C or less furnace coolings.
The beneficial effects of the present invention are: providing a kind of intermetallic Fe-Al compound and ZrO2Composite diphase material mobile phone pottery backboard Preparation method, this method are by Fe3Al intermetallic compound and ZrO2Granulation sintering obtains composite diphase material after grinding is blended.This is multiple Condensation material combines Fe3The excellent fracture toughness of Al intermetallic compound and ZrO2The characteristic of good bending strength and high rigidity, system Standby composite diphase material comprehensive mechanical property is excellent.In addition design of material one-component is excessive, and excess component can be used as sintering and help Agent reduces the densified conditions of the composite diphase material, densify it can in normal pressure-sintered furnace, and sintering aid can be with The microscopic defects such as composite diphase material Hole, crackle are filled up, optimize mechanical property, the cooling down technique of segmentation is not only by complex phase material ZrO in material2High-temperature-phase is saved in room temperature, improves its toughening effect, and reduces residual stress in composite diphase material cooling procedure The problem of release cracking, improve the yield of product.Zirconium oxide usage amount decreases in composite diphase material simultaneously, and cost is dropped It is low.
Detailed description of the invention
Fig. 1 is preparation method step schematic diagram.
Specific embodiment
Present invention is further described in detail below: a kind of intermetallic Fe-Al compound and ZrO2Composite diphase material mobile phone pottery Porcelain backing preparation method, comprising the following steps:
A) by mole Fe:Al=(71~77): (23~29) weigh iron powder and aluminium powder molten alloy, in indifferent gas Atmosphere environment mesohigh prepares intermetallic Fe-Al compound powder by spraying；
B) will obtain in the stable Zirconium oxide powder of yttrium and step a) intermetallic Fe-Al compound powder by weight (60~ 90): (10~40) are weighed into grinding pot, the use of alcohol or water are abrasive media, and grinding 18~for 24 hours, it obtains mixing and grinds Be milled body；
C) the mixed grinding powder high-energy ball milling 3h~5h for obtaining step b)；
D) it will be granulated to obtain pelletizing by the mixed grinding powder of step c) processing；
E) step d) is obtained into pelletizing after dry-pressing formed isostatic cool pressing is handled under the pressure of 200MPa~250MPa again Obtain isostatic cool pressing green body；
F) step e) is obtained into isostatic cool pressing green body and obtains mobile phone pottery backboard green body through numerically-controlled machine tool machining and shaping；
G) step e) mobile phone pottery backboard green body is obtained to be sintered under vacuum or inert atmosphere and cooling.
Fe:Al=(71~75): (25~29) in the present embodiment, in step a).
Fe:Al=(74~75): (25~26) in the present embodiment, in step a).
In the present embodiment, inert gas is Ar gas in step a), and air pressure is 0.3~0.5MPa.
In the present embodiment, the weight percent of yttrium stable zirconium oxide powder and intermetallic Fe-Al compound powder in step b) For (70~90): (10~30).
In the present embodiment, the weight percent of yttrium stable zirconium oxide powder and intermetallic Fe-Al compound powder in step b) For (85~90): (10~15).
In the present embodiment, step d) is mist projection granulating.
In the present embodiment, vacuum degree is -0.095MPa~-0.099MPa in step g), and inert atmosphere is Ar gas.
In the present embodiment, sintering temperature is 1400 DEG C~1600 DEG C in step g), and the heat preservation sintering time is 2h~5h.
In the present embodiment, step g) cooling technique is to be not higher than 1 DEG C/min in 1200 DEG C or more rate of temperature fall, 1200 DEG C~800 DEG C of rate of temperature fall are not less than 50 DEG C/min, 800 DEG C or less furnace coolings.
It is the embodiment of the present invention below:
Embodiment 1:
With the calculating of ingredient 10kg alloy, iron powder is weighed by mole Fe:Al=71:29 and vacuum melting is added in aluminium powder It in furnace, is warming up to 1300 DEG C of high melt 2h and obtains iron aluminum metal liquid, drained into the Ar gas atmosphere that air pressure is 0.3MPa and sprayed Cooling powder processed obtains intermetallic Fe-Al compound powder in mist granulation tower.
It will be calculated with ingredient 3kg alloy, the Zirconium oxide powder of stabilized with yttrium oxide and intermetallic Fe-Al compound powder will be pressed Weight ratio 60:40 is weighed into grinding pot, the use of alcohol is abrasive media, and grinding for 24 hours, obtains mixed grinding powder, will mix Grinding powder high-energy ball milling 3h again is closed, use is then dried and manually adds paraffin binder grinding, using nitrogen protection enclosed Mist projection granulating obtains pelletizing.Pelletizing is added in mold after dry-pressing and is demoulded, reuses isostatic cool pressing equipment in 200MPa Pressure under after 3~5min of pressure maintaining pressure release obtain isostatic cool pressing green body, which is obtained into mobile phone pottery Porcelain backing green body.
The green body is put into vacuum sintering furnace, sets vacuum degree as -0.095MPa, is warming up to 1400 DEG C of heat preservation 5h sintering After cool down, be cooled to before 1200 DEG C, rate of temperature fall is 1 DEG C/min, cold using Ar gas velocity is filled in 1200 DEG C~800 DEG C temperature descending sections Technique, rate of temperature fall be 50 DEG C/min, 800 DEG C or less furnace coolings.
In order to test phone housing (backboard) Mechanical Property of Ceramics, three-point bending method and unilateral is prepared by same technique Multiple samples of coped beam method test carry out Mechanics Performance Testing, and test result shows that the bending strength of the composite material is 840MPa, fracture toughness 31.7MPa.m1/2.Fracture toughness is substantially better than commercial toughened zirconia ceramics, bending strength with It quite, solves the bad technical problem of the phone housing fracture toughness of existing toughened zirconia ceramics, is suitble to mobile phone hair Open up the needs to structural members such as phone housings (backboard).
Embodiment 2:
With the calculating of ingredient 15kg alloy, iron powder is weighed by mole Fe:Al=77:23 and vacuum melting is added in aluminium powder It in furnace, is warming up to 1350 DEG C of high melt 1.5h and obtains iron aluminum metal liquid, drained into the Ar gas atmosphere that air pressure is 0.5MPa Cooling powder processed obtains intermetallic Fe-Al compound powder in mist projection granulating tower.
It will be calculated with ingredient 30kg alloy, the Zirconium oxide powder of stabilized magnesium hydroxide and intermetallic Fe-Al compound powder will be pressed Weight ratio 90:10 is weighed into grinding pot, the use of water is abrasive media, is ground 18h, obtain mixed grinding powder, will mix Powder high-energy ball milling 5h again is ground, polyvinyl alcohol adhesive mist projection granulating is then added and obtains pelletizing.Pelletizing is added Demoulded after dry-pressing in mold, reuse isostatic cool pressing equipment under the pressure of 250MPa after 3~5min of pressure maintaining pressure release obtain it is cold Equal static pressure green body, obtains mobile phone pottery backboard green body for the green body numerically-controlled machine tool machining and shaping.
The green body is put into vacuum sintering furnace, sets vacuum degree as -0.099MPa, is warming up to 1550 DEG C of heat preservation 2h sintering After cool down, be cooled to before 1200 DEG C, rate of temperature fall is 0.8 DEG C/min, in 1200 DEG C~800 DEG C temperature descending sections using filling Ar gas velocity Cold technique, rate of temperature fall are 60 DEG C/min, 800 DEG C or less furnace coolings.
In order to test phone housing (backboard) Mechanical Property of Ceramics, three-point bending method and unilateral is prepared by same technique Multiple samples of coped beam method test carry out Mechanics Performance Testing, and test result shows that the bending strength of the composite material is 950MPa, fracture toughness 18.1MPa.m1/2.Fracture toughness is substantially better than commercial toughened zirconia ceramics, bending strength with It quite, solves the bad technical problem of the phone housing fracture toughness of existing toughened zirconia ceramics, is suitble to mobile phone hair Open up the needs to structural members such as phone housings (backboard).
Embodiment 3:
With the calculating of ingredient 15kg alloy, iron powder is weighed by mole Fe:Al=75:25 and vacuum melting is added in aluminium powder It in furnace, is warming up to 1300 DEG C of high melt 2h and obtains iron aluminum metal liquid, drained into the Ar gas atmosphere that air pressure is 0.5MPa and sprayed Cooling powder processed obtains intermetallic Fe-Al compound powder in mist granulation tower.
It will be calculated with ingredient 30kg alloy, the Zirconium oxide powder of stabilized magnesium hydroxide and intermetallic Fe-Al compound powder will be pressed Weight ratio 70:30 is weighed into grinding pot, the use of alcohol is abrasive media, is ground 20h, obtain mixed grinding powder, will mix Grinding powder high-energy ball milling 4h again is closed, paraffin binder mist projection granulating is then added and obtains pelletizing.Mould is added in pelletizing Demoulded after dry-pressing in tool, reuse isostatic cool pressing equipment under the pressure of 220MPa after 3~5min of pressure maintaining pressure release obtain it is cold etc. The green body numerically-controlled machine tool machining and shaping is obtained mobile phone pottery backboard green body by static pressure green body.
The green body is put into Ar gas atmosphere sintering furnace, cools down after being warming up to 1600 DEG C of heat preservation 2h sintering, is cooled to 1200 Before DEG C, rate of temperature fall is 0.8 DEG C/min, uses in 1200 DEG C~800 DEG C temperature descending sections and fills the cold technique of Ar gas velocity, rate of temperature fall For 60 DEG C/min, 800 DEG C or less furnace coolings.
In order to test phone housing (backboard) Mechanical Property of Ceramics, three-point bending method and unilateral is prepared by same technique Multiple samples of coped beam method test carry out Mechanics Performance Testing, and test result shows that the bending strength of the composite material is 980MPa, fracture toughness 25.5MPa.m1/2.Fracture toughness is substantially better than commercial toughened zirconia ceramics, bending strength with It quite, solves the bad technical problem of the phone housing fracture toughness of existing toughened zirconia ceramics, is suitble to mobile phone hair Open up the needs to structural members such as phone housings (backboard).
Embodiment 4:
With the calculating of ingredient 15kg alloy, iron powder is weighed by mole Fe:Al=74:26 and vacuum melting is added in aluminium powder It in furnace, is warming up to 1300 DEG C of high melt 2h and obtains iron aluminum metal liquid, drained into the Ar gas atmosphere that air pressure is 0.4MPa and sprayed Cooling powder processed obtains intermetallic Fe-Al compound powder in mist granulation tower.
It will be calculated with ingredient 25kg alloy, the Zirconium oxide powder of stabilized magnesium hydroxide and intermetallic Fe-Al compound powder will be pressed Weight ratio 85:15 is weighed into grinding pot, the use of water is abrasive media, is ground 20h, obtain mixed grinding powder, will mix Powder high-energy ball milling 4h again is ground, polyvinyl alcohol adhesive mist projection granulating is then added and obtains pelletizing.Pelletizing is added Dry-pressing is at rear demoulding in mold, and reusing isostatic cool pressing equipment, pressure release obtains after 3~5min of pressure maintaining under the pressure of 220MPa The green body machining and shaping is obtained mobile phone pottery backboard green body by isostatic cool pressing green body.
The green body is put into vacuum sintering furnace, is cooled down after being warming up to 1550 DEG C of heat preservation 3h sintering, be cooled to 1200 DEG C with Before, rate of temperature fall is 0.8 DEG C/min, and in 1200 DEG C~800 DEG C temperature descending sections using the cold technique of low temperature Ar gas velocity is filled with, cooling is fast Rate is 60 DEG C/min, 800 DEG C or less furnace coolings.
In order to test phone housing (backboard) Mechanical Property of Ceramics, three-point bending method and unilateral is prepared by same technique Multiple samples of coped beam method test carry out Mechanics Performance Testing, and test result shows that the bending strength of the composite material is 910MPa, fracture toughness 19.9MPa.m1/2.Fracture toughness is substantially better than commercial toughened zirconia ceramics, bending strength with It quite, solves the bad technical problem of the phone housing fracture toughness of existing toughened zirconia ceramics, is suitble to mobile phone hair Open up the needs to structural members such as phone housings (backboard).
Embodiment 5:
With the calculating of ingredient 15kg alloy, iron powder is weighed by mole Fe:Al=74.5:25.5 and vacuum is added in aluminium powder It in smelting furnace, is warming up to 1300 DEG C of high melt 2h and obtains iron aluminum metal liquid, drained into the Ar gas gas that air pressure is 0.4MPa Cooling powder processed obtains intermetallic Fe-Al compound powder in atmosphere mist projection granulating tower.
It will be calculated with ingredient 25kg alloy, the Zirconium oxide powder of stabilized magnesium hydroxide and intermetallic Fe-Al compound powder will be pressed Weight ratio 87:13 is weighed into grinding pot, the use of water is abrasive media, is ground 20h, obtain mixed grinding powder, will mix Powder high-energy ball milling 4h again is ground, polyvinyl alcohol adhesive mist projection granulating is then added and obtains pelletizing.Pelletizing is added Dry-pressing is at rear demoulding in mold, and reusing isostatic cool pressing equipment, pressure release obtains after 3~5min of pressure maintaining under the pressure of 220MPa The green body machining and shaping is obtained mobile phone pottery backboard green body by isostatic cool pressing green body.
The green body is put into vacuum sintering furnace, is cooled down after being warming up to 1550 DEG C of heat preservation 3h sintering, be cooled to 1200 DEG C with Before, rate of temperature fall is 0.8 DEG C/min, and in 1200 DEG C~800 DEG C temperature descending sections using the cold technique of low temperature Ar gas velocity is filled with, cooling is fast Rate is 60 DEG C/min, 800 DEG C or less furnace coolings.
In order to test phone housing (backboard) Mechanical Property of Ceramics, three-point bending method and unilateral is prepared by same technique Multiple samples of coped beam method test carry out Mechanics Performance Testing, and test result shows that the bending strength of the composite material is 960MPa, fracture toughness 19.5MPa.m1/2.Fracture toughness is substantially better than commercial toughened zirconia ceramics, bending strength with It quite, solves the bad technical problem of the phone housing fracture toughness of existing toughened zirconia ceramics, is suitble to mobile phone hair Open up the needs to structural members such as phone housings (backboard).
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this In the scope of the claims of invention.

Claims (10)

1. a kind of intermetallic Fe-Al compound and ZrO2Composite diphase material mobile phone pottery backboard preparation method, it is characterised in that including with Lower step:
A) by mole Fe:Al=(74.5~77): (23~25.5) weigh iron powder and aluminium powder molten alloy, in indifferent gas Atmosphere environment mesohigh prepares the Fe of non-stoichiometric by spraying3Al intermetallic Fe-Al compound powder, wherein excessive metal conduct Sintering aid participates in sintering；
B) intermetallic Fe-Al compound powder will be obtained in the stable Zirconium oxide powder of yttrium and step a) by weight (87~90): (10~13) are weighed into grinding pot, the use of alcohol or water are abrasive media, and grinding 18h~for 24 hours, obtain mixed grinding powder Body；
C) the mixed grinding powder high-energy ball milling 3h~5h for obtaining step b)；
D) it will be granulated to obtain pelletizing by the mixed grinding powder of step c) processing；
E) step d) is obtained into pelletizing after dry-pressing formed isostatic cool pressing is handled under the pressure of 200MPa~250MPa again To isostatic cool pressing green body；
F) step e) is obtained into isostatic cool pressing green body numerically-controlled machine tool machining and shaping and obtains mobile phone pottery backboard green body；
G) step e) mobile phone pottery backboard green body is obtained to be sintered under vacuum or inert atmosphere and cooling.
2. intermetallic Fe-Al compound according to claim 1 and ZrO2The preparation side of the mobile phone pottery backboard of composite diphase material Method, it is characterised in that: the Fe:Al=74.5:25.5 in step a).
3. intermetallic Fe-Al compound according to claim 2 and ZrO2The preparation side of the mobile phone pottery backboard of composite diphase material Method, it is characterised in that: the Fe:Al=77:23 in step a).
4. intermetallic Fe-Al compound according to claim 3 and ZrO2The preparation side of the mobile phone pottery backboard of composite diphase material Method, it is characterised in that: inert gas is N in step a)2, air pressure is 0.3MPa~0.5MPa.
5. intermetallic Fe-Al compound according to claim 4 and ZrO2The preparation side of the mobile phone pottery backboard of composite diphase material Method, it is characterised in that: the weight percent of yttrium stable zirconium oxide powder and intermetallic Fe-Al compound powder is 87 in step b): 13。
6. intermetallic Fe-Al compound according to claim 5 and ZrO2The preparation side of the mobile phone pottery backboard of composite diphase material Method, it is characterised in that: the weight percent of yttrium stable zirconium oxide powder and intermetallic Fe-Al compound powder is 90 in step b): 10。
7. intermetallic Fe-Al compound according to claim 6 and ZrO2The preparation side of the mobile phone pottery backboard of composite diphase material Method, it is characterised in that: step d) is mist projection granulating.
8. intermetallic Fe-Al compound according to claim 7 and ZrO2The preparation side of the mobile phone pottery backboard of composite diphase material Method, it is characterised in that: vacuum degree is -0.095MPa~-0.099MPa in step g), and inert atmosphere is argon gas.
9. intermetallic Fe-Al compound according to claim 8 and ZrO2The preparation side of the mobile phone pottery backboard of composite diphase material Method, it is characterised in that: sintering temperature is 1400 DEG C~1600 DEG C in step g), and the heat preservation sintering time is 2h~5h.
10. intermetallic Fe-Al compound according to claim 9 and ZrO2The preparation side of the mobile phone pottery backboard of composite diphase material Method, it is characterised in that: step g) cooling technique is to be not higher than 1 DEG C/min in 1200 DEG C or more rate of temperature fall, 1200 DEG C~800 DEG C rate of temperature fall is not less than 50 DEG C/min, 800 DEG C or less furnace coolings.
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