CN103232246B - Preparation method of thermal spraying powder for ferrite corrosion-resistant coating - Google Patents
Preparation method of thermal spraying powder for ferrite corrosion-resistant coating Download PDFInfo
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- CN103232246B CN103232246B CN201310054258.5A CN201310054258A CN103232246B CN 103232246 B CN103232246 B CN 103232246B CN 201310054258 A CN201310054258 A CN 201310054258A CN 103232246 B CN103232246 B CN 103232246B
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- 239000000843 powder Substances 0.000 title claims abstract description 97
- 238000000576 coating method Methods 0.000 title abstract description 38
- 239000011248 coating agent Substances 0.000 title abstract description 37
- 238000005260 corrosion Methods 0.000 title abstract description 20
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 230000007797 corrosion Effects 0.000 title abstract description 11
- 229910000859 α-Fe Inorganic materials 0.000 title abstract description 10
- 238000007751 thermal spraying Methods 0.000 title abstract 6
- 238000000498 ball milling Methods 0.000 claims abstract description 27
- 238000001354 calcination Methods 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 238000005516 engineering process Methods 0.000 claims abstract description 21
- 238000005469 granulation Methods 0.000 claims abstract description 14
- 230000003179 granulation Effects 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000000227 grinding Methods 0.000 claims abstract description 8
- 238000001704 evaporation Methods 0.000 claims abstract description 7
- 230000008020 evaporation Effects 0.000 claims abstract description 7
- 239000013078 crystal Substances 0.000 claims abstract description 4
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 70
- 238000005507 spraying Methods 0.000 claims description 45
- 239000011812 mixed powder Substances 0.000 claims description 15
- 238000005245 sintering Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 229910052596 spinel Inorganic materials 0.000 claims description 2
- 239000011029 spinel Substances 0.000 claims description 2
- 238000007750 plasma spraying Methods 0.000 abstract description 15
- 238000009826 distribution Methods 0.000 abstract description 10
- 238000001035 drying Methods 0.000 abstract description 9
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 7
- 239000010962 carbon steel Substances 0.000 abstract description 4
- 229910003264 NiFe2O4 Inorganic materials 0.000 abstract 3
- NQNBVCBUOCNRFZ-UHFFFAOYSA-N nickel ferrite Chemical group [Ni]=O.O=[Fe]O[Fe]=O NQNBVCBUOCNRFZ-UHFFFAOYSA-N 0.000 abstract 3
- 238000005054 agglomeration Methods 0.000 abstract 1
- 230000002776 aggregation Effects 0.000 abstract 1
- 238000002425 crystallisation Methods 0.000 abstract 1
- 230000008025 crystallization Effects 0.000 abstract 1
- 238000007873 sieving Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 239000002245 particle Substances 0.000 description 11
- 239000011159 matrix material Substances 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 101150118471 PME3 gene Proteins 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to the technical field of thermal spraying powder and provides a preparation method of thermal spraying powder for a ferrite corrosion-resistant coating. The thermal spraying powder is NiFe2O4 powder for thermal spraying. The preparation method comprises the following steps of ball milling, evaporation, drying, grinding, sieving, calcination, agglomeration and granulation. The preparation method is simple and controllable, has low equipment requirements and a low cost, is convenient for operation, has a high powder yield, and is suitable for mass production of NiFe2O4 thermal spraying powder. The NiFe2O4 powder has high purity, a regular shape, a good crystal grain crystallization state, and uniform crystal grain size distribution. The coating prepared by a plasma spraying technology has good compactness and combinability, and is used as a protection coating of an AC grounding material. Compared with a carbon steel grounding material, the AC grounding material with the protection coating has greatly improved corrosion resistance.
Description
[technical field]
The present invention relates to hot spraying powder technical field, particularly a kind of power industry project of transmitting and converting electricity grounding device anti-corrosion coating Ni ferrite (NiFe
2o
4) preparation method of hot spraying powder.
[background technology]
Ni ferrite material is with its excellent corrosion resistance nature and good electroconductibility, and the anticorrosive electrode materials of the environmental protection as a new generation, can be used as the corrosion-resistant earthing material of project of transmitting and converting electricity, be subject to the extensive concern of power industry in recent years.And the preparations and applicatio that the fast development of hot-spraying techniques is high-performance Ni ferrite coating provides good basis.The method preparing ferrite powder in recent years has: chemical coprecipitation, hydrothermal method, sol-gel method, self-propagating method etc., but aforesaid method production technique, equipment are complicated, domesticly at present there is no formation Industrial products, and obtained Ni ferrite powder is difficult to the requirement meeting hot spraying powder, the preparation method of Ni ferrite anti-corrosion coating hot spraying powder waits further research.China's Surface Engineering 2012 the 25th volume the 3rd phase, " plasma spraying prepared direct current grounding pole steel matrix NiFe
2o
4corrosion protection coating " in have employed solid reaction process anchoring group poly-crush method granulation synthetic plasma spraying NiFe
2o
4powder, its NiFe
2o
4the average bonding strength of coating and matrix is 21.8MPa, and coating average resistivity is about 3.60 × 10
-2Ω cm, DC electrolysis corrosion rate is about 1.86g/(Aa), but the size distribution of obtained powder is uneven, grain crystalline is not in good state, and the problem for coating compactness during plasma spraying and fragility remains unsolved.
[summary of the invention]
In order to overcome above-mentioned defect, the invention provides a kind of for power industry project of transmitting and converting electricity grounding device anti-corrosion coating Ni ferrite (NiFe
2o
4) preparation method of hot spraying powder, this preparation method is simply controlled, low for equipment requirements, cost is low, easy to operate, powder output capacity is high, is suitable for producing NiFe in enormous quantities
2o
4hot spraying powder, and obtained NiFe
2o
4powder purity is high, regular shape, grain crystalline state is better, particle size distribution is even, the coating adopting plasma spray coating process to prepare is fine and close, associativity is good, as the protective coating of AC earth material, its corrosion resistance nature comparatively carbon steel earthing material improves a lot.
The present invention is by the following technical solutions for achieving the above object:
A kind of NiFe used for hot spraying
2o
4raw powder's production technology, comprises the steps:
1) ball milling: be the Fe of 1 ~ 5:1 by mol ratio
2o
3be placed in ball grinder ball milling 4 ~ 8h with NiO powder, ratio of grinding media to material is 3 ~ 5:1, and rotating speed is 300 ~ 500r/min; The capacity that ball grinder adopts Jinan medium wave special cermacis company limited to produce is the nylon tank of 800ml, and mill ball is ZrO
2ball.
2) evaporation, drying: the rotatory evaporator R-201 adopting Shanghai Shen Sheng Bioisystech Co., Ltd, at 70 ~ 80 DEG C, rotating speed is rotate evaporation step 1 under 80 ~ 120r/min) after the slurry that obtains of ball milling, the electric heating constant-temperature blowing drying box (DHG-9070A type) adopting PVG Rong Feng scientific instrument company limited to produce is dry 24 ~ 36h at 110 ~ 120 DEG C, obtains Fe
2o
3with NiO mixed powder;
3) grind, sieve: grinding steps 2) Fe that obtains
2o
3200 ~ 400 mesh sieves are crossed with after NiO mixed powder;
4) calcine: the mixed powder sintering soak 1.5 ~ 6h that sieves at 950 ~ 1200 DEG C, step 3) obtained, synthesis NiFe
2o
4powder;
5) reunion, granulation: the NiFe that mixing PVA solution and step 4) obtain
2o
4powder, ball milling is reunited, broken granulation, crosses 80 ~ 120 mesh sieves, obtain NiFe after 500-600 DEG C of calcining
2o
4powder.
One of the present invention NiFe used for hot spraying
2o
4raw powder's production technology, wherein, Fe
2o
3purity>=99.9% of powder.
One of the present invention NiFe used for hot spraying
2o
4raw powder's production technology, wherein, purity>=99.9% of NiO powder.
One of the present invention NiFe used for hot spraying
2o
4raw powder's production technology, wherein, in step 1), the abrading-ball of ball milling is ZrO
2.
One of the present invention NiFe used for hot spraying
2o
4raw powder's production technology, wherein, in step 1), ball milling is wet mixing ball milling, medium to be ethanol content be 75% industrial spirit.
One of the present invention NiFe used for hot spraying
2o
4raw powder's production technology, wherein, the atmosphere of calcining is atmospheric air atmosphere.
One of the present invention NiFe used for hot spraying
2o
4raw powder's production technology, wherein, the massfraction of PVA solution is 8% ~ 15%.
One of the present invention NiFe used for hot spraying
2o
4raw powder's production technology, wherein, the ball milling in step 5) is reunited and is adopted planetary ball mill.
One of the present invention NiFe used for hot spraying
2o
4raw powder's production technology, wherein, sintering synthesis adopts the LHRO4/17 type high temperature sintering furnace of German Nabertherm; Ball milling is reunited and is adopted the QM-3SP4 planetary ball mill of Nanjing Univ. Instrument Factory's production, the chamber type electric resistance furnace (SRJX-8-13) that after fragmentation of reuniting, calcining employing Beijing Electric Stove Factory produces.
One of the present invention NiFe used for hot spraying
2o
4raw powder's production technology, wherein, NiFe
2o
4for inverse spinel type crystal structure.
The NiFe that the present invention is obtained
2o
4powder adopts hot-spraying techniques, at conventional steel earthing pole surface-coated NiFe
2o
4coating, with reference to Chinese Surface Engineering 2012 the 25th volume the 3rd phase, " plasma spraying prepares direct current grounding pole steel matrix NiFe to coating spraying method
2o
4corrosion protection coating ".Adopt D/max-RB type X-ray diffractometer (XRD) analysed for powder of Rigaku (Rigaku) company and the phase structure of coating; FDAC Hitachi S-4800 field emission scanning electron microscope (FESEM) carries out tissue topography's observation to powder and coating; Olympus PME3 type metaloscope carries out fabric analysis to coating interface.
Adopt the bonding strength of cohering stretching method testing coating and matrix on universal testing machine; KEITHLEY precision resister tester is with the resistance of two hold-carrying testing coatings and calculate resistivity (test method with reference to Nuclear Science And Engineering, 2008,28(4): in 295-299, CLAM steel matrix, air plasma spraying prepares aluminum oxide coating layer technical study).
Adopt German Zahner M6 type electrochemical workstation to NiFe
2o
4coating carries out room temperature electrochemical corrosion test, and corrosive medium is 3% (wt.%) NaCl solution, and NaCl adopts analytical pure (content>=99.5%, wt.%), and solvent adopts deionized water.Sample epoxy resin carries out cold edge, and specimen surface only exposes the area of 10mm × 10mm as part of detecting, and remaining surface epoxy sealing insulate.
The present invention adopts simple solid reaction process, and improves concrete technology step, prepares high purity and the NiFe of applicable thermospray use
2o
4powder, technical process and equipment are simply controlled, easy to operate, cost is low, with short production cycle, reproducible, powder output capacity is high (can reach more than 75%), are applicable to NiFe in enormous quantities
2o
4the demand that anti-corrosion coating is produced with hot spraying powder, and obtained NiFe
2o
4powder regular shape, in nearly ellipsoidal structure, grain crystalline state is better, and evenly (see table 1), grain size is 80 ~ 120 μm to particle size distribution, is suitable for plasma spraying and prepares the high anti-corrosion NiFe of project of transmitting and converting electricity grounding device
2o
4coating.
5500-2000 type (spray gun model SG100) the air plasma spray system that coating preparation adopts Praxair company to produce, spray gun moves the manipulator control produced by ABB AB, and coating is prepared key process parameter and comprised spraying current: 750-900A; Main gas (Ar) flow: 70-90SCFH; Auxiliary gas (He) flow: 40-60SCFH; Powder feeding rate: 10-15g/min; Spraying number of times: 5 times.The NiFe of preparation
2o
4anti-corrosion coating causes carbon steel corrosion resistance nature and greatly promotes (see table 2).
The NiFe that table 1 the present invention obtains
2o
4the size distribution of hot spraying powder
| Size distribution | Example 1:80-120 μm | Example 2:80-120 μm | Example 3:80-120 μm |
| Volume fraction/% | 85% | 88% | 86% |
The correlation data of table 2 erosion resistance
| Sample | Carbon steel | Example 1: coating | Example 2: coating | Example 3: coating |
| Erosion rate/mm/a | 0.0725 | 0.0070 | 0.0062 | 0.0065 |
Accompanying drawing explanation
Fig. 1 is the NiFe that the present invention obtains
2o
4the X-ray diffractogram of powder;
Fig. 2 is the NiFe that the present invention obtains
2o
4the stereoscan photograph of powder;
Fig. 3 is the NiFe that the present invention obtains
2o
4the stereoscan photograph of powder.
[embodiment]
All embodiments are all the equipment and the instrument that adopt existing routine, carry out according to step described above:
Embodiment 1
Be 99.9%Fe by purity
2o
3be that 99.9%NiO powder is placed in ball grinder by proportioning 2:1 with purity, and add ZrO
2abrading-ball and ball-milling medium (concentration is 75% industrial spirit), ratio of grinding media to material is 4:1, and rotational speed of ball-mill is 400r/min, and Ball-milling Time is 6 hours.Adopt Rotary Evaporators to carry out High Temperature Rotating evaporation to the slurry that ball milling obtains, obtain Fe
2o
3with NiO mixed powder, be then placed in high temperature drying case and within 24 hours, obtain dry Fe
2o
3with NiO mixed powder.Vaporization temperature 80 DEG C, rotating speed is 100r/min, and loft drier temperature is 120 DEG C.By the Fe of drying obtained
2o
3grind with NiO mixed powder and cross 300 mesh sieves.High temperature sintering furnace is adopted to make it synthesize NiFe the powder calcination sieved
2o
4high-purity powder, calcining temperature is 1200 DEG C, and calcination time is 1.5 hours, and calcination atmosphere is air atmosphere.The NiFe obtained will be calcined
2o
4powder and massfraction be 10% PVA solution mix, the volume ratio of powder and PVA solution is 50:1, is placed in planetary ball mill and reunites, last broken granulation, crosses obtained NiFe after 100 mesh sieves
2o
4hot spraying powder.Obtained NiFe
2o
4the particle diameter of hot spraying powder is the 80-120 μm that applicable plasma spraying diameter of particle requires, NiFe prepared by plasma spraying
2o
4the average bonding strength of coating and plain steel is 22.1MPa, and conductivity mean value is 3.52 × 10
-2Ω cm, coating average corrosion rate is 0.0070mm/a.
Fig. 1 is the X-ray diffractogram of the hot spraying powder that the present embodiment obtains, and from diffraction peak in figure, hot spraying powder obtained after calcining, reunion-broken granulation is pure single-phase NiFe
2o
4powder.
Fig. 2 is 1200 DEG C in calcining temperature, calcines gained NiFe after 1.5 hours
2o
4powder (a) and the NiFe after reunion-broken granulation
2o
4hot spraying powder (b) SEM schemes.From figure (a), the granularity of calcining synthetic powder is less, and distribution of sizes is less, and between 300-500nm, grain crystalline is better; From figure (b), the NiFe after reunion-broken granulation
2o
4the size distribution of hot spraying powder is even, and size is the 80-120 μm of applicable plasma spraying diameter of particle requirement.Fig. 2 is the stereoscan photograph of synthetic powder, can find out the NiFe in this powder
2o
4particle is by multiple NiFe
2o
4directed nanoparticle of assembling.
Embodiment 2
Be 99.9%Fe by purity
2o
3be that 99.9%NiO powder is placed in ball grinder by 1:1 mol ratio with purity, and add ZrO
2abrading-ball and ball-milling medium (concentration is 75% industrial spirit), ratio of grinding media to material is 4:1, and rotational speed of ball-mill is 400r/min, and Ball-milling Time is 8 hours.Adopt Rotary Evaporators to carry out High Temperature Rotating evaporation to the slurry that ball milling obtains, obtain Fe
2o
3with NiO mixed powder, be then placed in high temperature drying case and within 36 hours, obtain dry Fe
2o
3with NiO mixed powder.Vaporization temperature is 70 DEG C, and rotating speed is 100r/min, and loft drier temperature is 110 DEG C.By the Fe of drying obtained
2o
3grind with NiO mixed powder and cross 300 mesh sieves.High temperature sintering furnace is adopted to make it synthesize NiFe the powder calcination sieved
2o
4high-purity powder, calcining temperature is 1050 DEG C, and calcination time is 4 hours, and calcination atmosphere is air atmosphere.The NiFe obtained will be calcined
2o
4powder and massfraction be 10% PVA solution mix, the volume ratio of powder and PVA solution is 50:1, is placed in planetary ball mill and reunites, last broken granulation, crosses obtained NiFe after 100 mesh sieves
2o
4hot spraying powder.Obtained NiFe
2o
4the particle diameter of hot spraying powder is the 80-120 μm that applicable plasma spraying diameter of particle requires, NiFe prepared by plasma spraying
2o
4the average bonding strength of coating and plain steel is 23.0MPa, and conductivity mean value is 3.59 × 10
-2Ω cm, coating average corrosion rate is 0.0062mm/a.
Fig. 3 is calcining temperature is 1050 DEG C, calcines the NiFe of gained after 4 hours
2o
4powder (a) and the NiFe after reunion-broken granulation
2o
4hot spraying powder (b) SEM schemes.From figure (a), the granularity of calcining synthetic powder is less, and distribution of sizes is less, and between 300-500nm, grain crystalline is better; From figure (b), the NiFe after reunion-broken granulation
2o
4the size distribution of hot spraying powder is even, and size is the 80-120 μm of applicable plasma spraying diameter of particle requirement.
Embodiment 3
Be the Fe of 99.9% by purity
2o
3be placed in ball grinder with NiO powder by proportioning 1.5:1, and add ZrO
2abrading-ball and ball-milling medium (concentration is 75% industrial spirit), ratio of grinding media to material is 4:1, and rotational speed of ball-mill is 400r/min, and Ball-milling Time is 6 hours.Adopt Rotary Evaporators to carry out High Temperature Rotating evaporation to the slurry that ball milling obtains, obtain Fe
2o
3with NiO mixed powder, be then placed in high temperature drying case and within 24 hours, obtain dry Fe
2o
3with NiO mixed powder.Vaporization temperature is 80 DEG C, and rotating speed is 100r/min, and loft drier temperature is 120 DEG C.By the Fe of drying obtained
2o
3grind with NiO mixed powder and cross 300 mesh sieves.High temperature sintering furnace is adopted to make it synthesize NiFe the powder calcination sieved
2o
4high-purity powder, calcining temperature is 1100 DEG C, and calcination time is 3 hours, and calcination atmosphere is air atmosphere.The NiFe obtained will be calcined
2o
4powder and massfraction be 12% PVA solution mix, the volume ratio of powder and PVA solution is 50:1, is placed in planetary ball mill and reunites, last broken granulation, crosses obtained NiFe after 100 mesh sieves
2o
4hot spraying powder.Obtained NiFe
2o
4the particle diameter of hot spraying powder is the 80-120 μm that applicable plasma spraying diameter of particle requires, NiFe prepared by plasma spraying
2o
4the average bonding strength of coating and plain steel is 22.6MPa, and conductivity mean value is 3.56 × 10
-2Ω cm, coating average corrosion rate is 0.0065mm/a.
Claims (8)
1. a NiFe used for hot spraying
2o
4raw powder's production technology, comprises the steps:
1) ball milling: be the Fe of 1 ~ 5:1 by mol ratio
2o
3be placed in ball grinder ball milling 4 ~ 8h with NiO powder, ratio of grinding media to material is 3 ~ 5:1, and rotating speed is 300 ~ 500r/min;
2) evaporate, dry: at 70 ~ 80 DEG C, rotating speed is rotate evaporation step 1 under 80 ~ 120r/min) after the slurry that obtains of ball milling, at 110 ~ 120 DEG C, dry 24 ~ 36h, obtains Fe
2o
3with NiO mixed powder;
3) grind, sieve: grinding steps 2) Fe that obtains
2o
3200 ~ 400 mesh sieves are crossed with after NiO mixed powder;
4) calcine: by step 3 at 950 ~ 1200 DEG C) the mixed powder sintering soak 1.5 ~ 6h that sieves that obtains, synthesis NiFe
2o
4powder;
5) reunite, granulation: mixing PVA solution and step 4) NiFe that obtains
2o
4powder, ball milling is reunited, broken granulation, crosses 80 ~ 120 mesh sieves, obtain NiFe after 500 ~ 600 DEG C of calcinings
2o
4powder;
Described Fe
2o
3purity>=99.9% of powder; Purity>=99.9% of described NiO powder.
2. a kind of NiFe used for hot spraying as claimed in claim 1
2o
4raw powder's production technology, is characterized in that described step 1) in the abrading-ball of ball milling be ZrO
2.
3. a kind of NiFe used for hot spraying as claimed in claim 1
2o
4raw powder's production technology, is characterized in that described step 1) in ball milling be wet mixing ball milling, medium is industrial spirit.
4. a kind of NiFe used for hot spraying as claimed in claim 3
2o
4raw powder's production technology, is characterized in that the purity of described industrial spirit is 75%.
5. a kind of NiFe used for hot spraying as claimed in claim 1
2o
4raw powder's production technology, is characterized in that the atmosphere of described calcining is atmospheric air atmosphere.
6. a kind of NiFe used for hot spraying as claimed in claim 1
2o
4raw powder's production technology, is characterized in that the massfraction of described PVA solution is 8% ~ 15%.
7. a kind of NiFe used for hot spraying as claimed in claim 1
2o
4raw powder's production technology, is characterized in that described step 5) in ball milling reunite adopt planetary ball mill.
8. a kind of NiFe used for hot spraying as claimed in claim 1
2o
4raw powder's production technology, is characterized in that described NiFe
2o
4for inverse spinel type crystal structure.
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| CN103602941B (en) * | 2013-11-28 | 2016-04-20 | 国家电网公司 | A kind of ferrite conductive coating and preparation method |
| CN104909735A (en) * | 2014-03-13 | 2015-09-16 | 江苏联合金陶特种材料科技有限公司 | High temperature resistant corrosion-resistant ceramic material and preparation method thereof |
| CN105036728B (en) * | 2015-07-29 | 2018-08-14 | 国网智能电网研究院 | A kind of preparation method of conductive coating Li ferrite hot spraying powder |
| CN106366419B (en) * | 2016-09-09 | 2019-02-26 | 国网山东省电力公司荣成市供电公司 | A kind of XLPE cable insulating materials |
| CN106496747A (en) * | 2016-11-16 | 2017-03-15 | 国网山东省电力公司荣成市供电公司 | A kind of high voltage direct current cable |
| CN107516567A (en) * | 2017-10-17 | 2017-12-26 | 苏州南尔材料科技有限公司 | A kind of preparation method of the Ni-based soft magnetic materials of surface treated iron |
| CN111057985A (en) * | 2019-12-31 | 2020-04-24 | 广东省新材料研究所 | High-performance perovskite type oxide powder for thermal spraying and preparation method and application thereof |
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| CN101255570A (en) * | 2007-12-07 | 2008-09-03 | 东北大学 | Inert anode material for aluminium electrolysis and method for manufacturing same |
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| CN101255570A (en) * | 2007-12-07 | 2008-09-03 | 东北大学 | Inert anode material for aluminium electrolysis and method for manufacturing same |
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