CN105957666A - Varistor valve plate for lightning arrester and preparation method thereof - Google Patents
Varistor valve plate for lightning arrester and preparation method thereof Download PDFInfo
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- CN105957666A CN105957666A CN201610509218.9A CN201610509218A CN105957666A CN 105957666 A CN105957666 A CN 105957666A CN 201610509218 A CN201610509218 A CN 201610509218A CN 105957666 A CN105957666 A CN 105957666A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 92
- 239000011787 zinc oxide Substances 0.000 claims description 46
- 229960001296 zinc oxide Drugs 0.000 claims description 35
- 239000011230 binding agent Substances 0.000 claims description 30
- 239000002994 raw material Substances 0.000 claims description 25
- 238000000498 ball milling Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims description 18
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 17
- 210000001161 mammalian embryo Anatomy 0.000 claims description 14
- 238000000465 moulding Methods 0.000 claims description 14
- 239000011236 particulate material Substances 0.000 claims description 14
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Inorganic materials O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052681 coesite Inorganic materials 0.000 claims description 9
- 229910052906 cristobalite Inorganic materials 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 9
- 229910052682 stishovite Inorganic materials 0.000 claims description 9
- YEAUATLBSVJFOY-UHFFFAOYSA-N tetraantimony hexaoxide Chemical compound O1[Sb](O2)O[Sb]3O[Sb]1O[Sb]2O3 YEAUATLBSVJFOY-UHFFFAOYSA-N 0.000 claims description 9
- 229910052905 tridymite Inorganic materials 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- 238000000748 compression moulding Methods 0.000 claims description 7
- 239000002270 dispersing agent Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 7
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 7
- -1 stirring Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 10
- 229940068984 polyvinyl alcohol Drugs 0.000 description 6
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 238000011056 performance test Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
Abstract
The invention provides a varistor valve plate for a lightning arrester and a preparation method thereof. The varistor valve plate is prepared by the materials comprising the following components by mole percentage: 90-98% of ZnO, 0.05-2.0% of Bi<2>O<3>, 0.05-2.0% of B<2>O<3>, 0.02-1.0% of Y<2>O<3>, 0.02-1.0% of NiO, 0.02-1.0% of Cr<2>O<3>, 0.05-3.0% of Sb<2>O<3>, 0.01-1.0% SiO<2> and 0.01-1.0% of MgO. The varistor valve plate provided by the invention has excellent integrated performance; the varistor voltage gradient reaches more than 500V/mm; the square wave discharge current capacity is greater than 400J/cm<3>; the leakage current is lower than 5.0 muA; and the nonlinear coefficient is greater than 25.0. The varistor valve plate and the method are simple in preparation technology and high in technical economy. The industrial production demand can be completely realized by the existing lightning arrester valve plate manufacturing equipment.
Description
Technical field
The present invention relates to a kind of varistor valve, be specifically related to a kind of spark gap varistor valve and preparation method thereof.
Background technology
The core parts of Zinc-Oxide Arrester are non-liner oxidation zinc resistor valve sheet material (MOV).High performance MOV is to manufacture
The basis of high-performance zinc oxide spark gap.Research and development about Zinc-Oxide Arrester core parts varistor valve experienced by three
The individual stage: the first stage is the first application of Zinc-Oxide Arrester before and after 1975；Second stage is before and after 1988, always
Change characteristic and protection feature improved high-performance zinc oxide arrester valve piece is applied in 500kV power system；Phase III
It is before and after 1997, have developed the ZnO varistor valve block of high-potential gracient (former electric potential gradient 1.5～2 times).
After Japanese Matsushita Electric Industrial company nineteen sixty-eight invents non-linear zinc oxide resistance sheet, people are to zinc oxide piezoresistive material
Gradually being researched and analysed, update, performance is constantly strengthened.Wherein, No. 201010538897.5 Chinese invention patent public affairs
Open a kind of zinc oxide piezoresistive material and preparation method thereof；201210582082.6 Chinese invention patent disclose a kind of oxygen
Change zinc piezoresistive material and preparation method；201110421092.7 a number Chinese invention patent discloses a kind of high-potential gracient oxidation
Zinc piezoresistive material and preparation method thereof；All there is universal rule in these prior aries, it is simply that hyperreaction formula varistor
After heavy current impact, nonlinear change is relatively big, and porcelain body internal structure is destroyed serious, thus loses the advantage of hyperreaction, but non-
The lightning protection valve block that linear coefficient is relatively low, often, its voltage rate of change and nonlinear factor rate of change are little for resistance to heavy current impact,
But sensitivity is relatively weak.Therefore, also need to be designed and improve to above-mentioned piezoresistor formula and structure, both realized
While piezoresistor high susceptibility under small area analysis impacts, again under big electric current repeated stock, piezoresistor interior
Portion's structure change is less, thus realizes effective lightning protection.
Along with popularization and application and the continuous lifting of AC and DC transmission system electric pressure of Zinc-Oxide Arrester, to non-linear oxygen
The performance requirement changing zinc varistor valve is more and more higher, is improved zinc oxide varistor valve further by doping vario-property
Electric potential gradient and discharge capacity, promote the electric property of domestic ZnO resistors valve block product, to the mistake improving Zinc-Oxide Arrester
Voltage protection level, develops rapidly power industry and has great significance.
Summary of the invention
In order to overcome the defect of prior art to meet the needs of prior art, the present invention proposes a kind of spark gap varistor valve
And preparation method thereof.
In order to achieve the above object, the invention provides employing following technical proposals:
A kind of spark gap varistor valve, by mole meter, resistor valve sheet material is prepared by following component: ZnO:
90～98%, Bi2O3: 0.05～2.0%, B2O3: 0.05～2.0%, Y2O3: 0.02～1.0%, NiO:0.02～1.0%, Cr2O3:
0.02～1.0%, Sb2O3: 0.05～3.0%, SiO2: 0.01～1.0%, MgO:0.01～1.0%.
A kind of first preferred version of spark gap varistor valve, ZnO:91.1～97.6%, Bi2O3: 0.1～1.5%, B2O3:
0.1～1.5%, Y2O3: 0.1～0.8%, NiO:0.8～1.0%, Cr2O3: 0.1～0.5%, Sb2O3: 1.0～2.0%, SiO2:
0.1～0.8%, MgO:0.1～0.8%.
The preparation method of a kind of spark gap varistor valve, comprises the following steps:
(1) dispensing: prepare by the molar percentage of raw material；
(2) ball milling: be ground with zirconium oxide abrasive ball, rotational speed of ball-mill is 200～250r/min, Ball-milling Time 6～10h；
(3) pelletize: the slurry after ball milling is dried, is pulverized, crosses 20～40 mesh sieves, adds and accounts for powder weight 5～10% go
Ionized water, stirring, form the aqueous particulate material of mix homogeneously；
(4) molding: aqueous particulate material described in step (3) is used tabletting machine molding；
(5) binder removal: the varistor element embryo of compression molding in step (4) is carried out binder removal process；
(6) burn till: use batch-type furnace to carry out normal pressure-sintered Zinc-oxide piezoresistor element embryo after step (5) binder removal；
(7) abrasive disc: by the zinc oxide varistor valve grinding two end surfaces of densified sintering product in step (6), uses ultrasonic cleaning
Valve block surface；
(8) aluminium-plated, upper side insulate.
First preferred version of the preparation method of a kind of spark gap varistor valve, before step (2) is ground, by raw material
1.5～2 times of weight, add deionized water as dispersant, by the 3～6% of raw material weight add concentration be 5～10wt.% poly-
Vinyl alcohol aqueous solution is as binding agent.
Second preferred version of the preparation method of a kind of spark gap varistor valve, is dried before step (3) pelletize, dry
Dry temperature 120～150 DEG C, the time 24～36h.
3rd preferred version of the preparation method of a kind of spark gap varistor valve, in step (4), briquetting pressure is 5～10
MPa/cm2, the dwell time 2～5min.
A kind of 4th preferred version of the preparation method of spark gap varistor valve, in step (5) binder removal treatment temperature and time
Between as follows: room temperature to 180 DEG C, heating-up time 4h；180 DEG C to 380 DEG C, heating-up time 4h, it is incubated 3～4h；With stove
Cooling, samples after being cooled to room temperature.
5th preferred version of the preparation method of a kind of spark gap varistor valve, in step (6), sintering temperature and time are such as
Under: room temperature to 600 DEG C, heating-up time 5h；600 DEG C to 850 DEG C, heating-up time 2h；850 DEG C to 1200 DEG C, heat up
Time 3h, is incubated 2.5～4h；Furnace cooling, samples after being cooled to room temperature.
6th preferred version of the preparation method of a kind of spark gap varistor valve, is dried after step (7) abrasive disc, dry
Dry temperature 120 DEG C～150 DEG C, drying time 8～12h.
Compared with immediate prior art, the technical scheme that the present invention provides has a following excellent effect:
1) varistor valve of the present invention has excellent combination property, and breakdown voltage gradient reaches more than 500V/mm, side
Ripple discharge capacity is 400J/cm3Above, leakage current 5.0 below μ A, nonlinear factor more than 25.0；
2) the varistor valve preparation technology of the present invention is simple, and Technical Economy is high, and it is complete that existing arrester valve piece manufactures equipment
Entirely can realize commercial production demand.
Detailed description of the invention
It is described in further detail below in conjunction with specific embodiment, technical scheme is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the reality in the present invention
Execute example, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into
The scope of protection of the invention.
Embodiment 1
The preparation technology of the Zinc-Oxide Arrester varistor valve of this example, comprises the steps of
1) dispensing: prepare by the molar percentage of raw material, concrete formula is as follows: ZnO:90%, Bi2O3: 2.0%,
B2O3: 2.0%, Y2O3: 1.0%, NiO:1.0%, Cr2O3: 1.0%, Sb2O3: 1.0%, SiO2: 1.0%, MgO:
1.0%；
2) ball milling: by the above-mentioned raw material prepared, by the 1.5 of raw material weight times, addition deionized water is as dispersant, by former
Material weight 3% addition concentration be the polyvinyl alcohol water solution of 10wt.% as binding agent, be ground with zirconium oxide abrasive ball,
Rotational speed of ball-mill is 200r/min, Ball-milling Time 10h；
3) pelletize: the slurry after ball milling is dried, baking temperature 120 DEG C, drying time 36h, by dried block material powder
After broken, cross 20 mesh sieves, add the deionized water accounting for powder weight 5%, stirring, form the aqueous particulate material of mix homogeneously；
4) molding: by 3) in aqueous particulate material use tabletting machine molding, briquetting pressure is 5MPa/cm2, the dwell time
5min；
5) binder removal: by 4) in the varistor element embryo of compression molding to carry out binder removal process, actual temp and the time of control as follows:
Room temperature to 180 DEG C, heating-up time 4h；180 DEG C to 380 DEG C, heating-up time 4h, it is incubated 4h；Furnace cooling, cooling
Sample to room temperature；
6) burn till: use batch-type furnace to carry out normal pressure-sintered Zinc-oxide piezoresistor element embryo after binder removal, when actual temp and control
Between as follows: room temperature to 600 DEG C, heating-up time 5h；600 DEG C to 850 DEG C, heating-up time 2h；850 DEG C to 1200 DEG C,
Heating-up time 3h, is incubated 2.5h；Furnace cooling, samples after being cooled to room temperature；
7) abrasive disc: by 6) in the zinc oxide varistor valve grinding two end surfaces of densified sintering product, use ultrasonic cleaning valve block surface
Greasy dirt, dust and other impurities, be then dried, baking temperature 120 DEG C, drying time, 12h, fully removed in resistor valve sheet
The moisture of absorption；
8) aluminium-plated, upper side insulation: by 7) in resistor valve sheet both ends of the surface spray aluminum electrode, coat low temperature glass in valve block side
Glaze is as side insulation.
The zinc oxide varistor valve preparing test carries out performance test, the pressure-sensitive electricity of obtained varistor valve
Pressure gradient is more than 528V/mm, and square wave discharge capacity is 430J/cm3Above, leakage current 4.72 μ A, nonlinear factor 26.
Embodiment 2
The preparation technology of the Zinc-Oxide Arrester varistor valve of this example, comprises the steps of
1) dispensing: prepare by the molar percentage of raw material, concrete formula is as follows: ZnO:98%, Bi2O3: 0.05%,
B2O3: 0.05%, Y2O3: 0.02%, NiO:0.02%, Cr2O3: 0.02%, Sb2O3: 1.43%, SiO2: 0.01%,
MgO:0.01%；
2) ball milling: by the above-mentioned raw material prepared, by the 2 of raw material weight times, addition deionized water is as dispersant, by raw material
Weight 6% addition concentration be the polyvinyl alcohol water solution of 5wt.% as binding agent, be ground with zirconium oxide abrasive ball, ball milling
Rotating speed is 250r/min, Ball-milling Time 6h；
3) pelletize: the slurry after ball milling is dried, baking temperature 150 DEG C, drying time 24h, by dried block material powder
After broken, cross 40 mesh sieves, add the deionized water accounting for powder weight 10%, stirring, form the aqueous particulate material of mix homogeneously；
4) molding: by 3) in aqueous particulate material use tabletting machine molding, briquetting pressure is 10MPa/cm2, the dwell time
2min；
5) binder removal: by 4) in the varistor element embryo of compression molding to carry out binder removal process, actual temp and the time of control as follows:
Room temperature to 180 DEG C, heating-up time 4h；180 DEG C to 380 DEG C, heating-up time 4h, it is incubated 3h；Furnace cooling, cooling
Sample to room temperature；
6) burn till: use batch-type furnace to carry out normal pressure-sintered Zinc-oxide piezoresistor element embryo after binder removal, when actual temp and control
Between as follows: room temperature to 600 DEG C, heating-up time 5h；600 DEG C to 850 DEG C, heating-up time 2h；850 DEG C to 1200 DEG C,
Heating-up time 3h, is incubated 3h；Furnace cooling, samples after being cooled to room temperature；
7) abrasive disc: by 6) in the zinc oxide varistor valve grinding two end surfaces of densified sintering product, use ultrasonic cleaning valve block surface
Greasy dirt, dust and other impurities, be then dried, baking temperature 150 DEG C, drying time, 8h, fully removed in resistor valve sheet
The moisture of absorption；
8) aluminium-plated, upper side insulation: by 7) in resistor valve sheet both ends of the surface spray aluminum electrode, coat low temperature glass in valve block side
Glaze is as side insulation.
The zinc oxide varistor valve preparing test carries out performance test, the pressure-sensitive electricity of obtained varistor valve
Pressure gradient is more than 542V/mm, and square wave discharge capacity is 452J/cm3Above, leakage current 4.82 μ A, nonlinear factor 25.
Embodiment 3
The preparation technology of the Zinc-Oxide Arrester varistor valve of this example, comprises the steps of
1) dispensing: prepare by the molar percentage of raw material, concrete formula is as follows: ZnO:91.1%, Bi2O3: 1.5%,
B2O3: 1.5%, Y2O3: 0.8%, NiO:1.0%, Cr2O3: 0.5%, Sb2O3: 2.0%, SiO2: 0.8%, MgO:
0.8%；
2) ball milling: by the above-mentioned raw material prepared, by the 2 of raw material weight times, addition deionized water is as dispersant, by raw material
Weight 4% addition concentration be the polyvinyl alcohol water solution of 6wt.% as binding agent, be ground with zirconium oxide abrasive ball, ball milling
Rotating speed is 250r/min, Ball-milling Time 6h；
3) pelletize: the slurry after ball milling is dried, baking temperature 150 DEG C, drying time 36h, by dried block material powder
After broken, cross 30 mesh sieves, add the deionized water accounting for powder weight 6%, stirring, form the aqueous particulate material of mix homogeneously；
4) molding: by 3) in aqueous particulate material use tabletting machine molding, briquetting pressure is 10MPa/cm2, the dwell time
3min；
5) binder removal: by 4) in the varistor element embryo of compression molding to carry out binder removal process, actual temp and the time of control as follows:
Room temperature to 180 DEG C, heating-up time 4h；180 DEG C to 380 DEG C, heating-up time 4h, it is incubated 3h；Furnace cooling, cooling
Sample to room temperature；
6) burn till: use batch-type furnace to carry out normal pressure-sintered Zinc-oxide piezoresistor element embryo after binder removal, when actual temp and control
Between as follows: room temperature to 600 DEG C, heating-up time 5h；600 DEG C to 850 DEG C, heating-up time 2h；850 DEG C to 1200 DEG C,
Heating-up time 3h, is incubated 3h；Furnace cooling, samples after being cooled to room temperature；
7) abrasive disc: by 6) in the zinc oxide varistor valve grinding two end surfaces of densified sintering product, use ultrasonic cleaning valve block surface
Greasy dirt, dust and other impurities, be then dried, baking temperature 150 DEG C, drying time, 10h, fully removed in resistor valve sheet
The moisture of absorption；
8) aluminium-plated, upper side insulation: by 7) in resistor valve sheet both ends of the surface spray aluminum electrode, coat low temperature glass in valve block side
Glaze is as side insulation.
The zinc oxide varistor valve preparing test carries out performance test, the pressure-sensitive electricity of obtained varistor valve
Pressure gradient is more than 598V/mm, and square wave discharge capacity is 465J/cm3Above, leakage current 4.78 μ A, nonlinear factor 28.
Embodiment 4
The preparation technology of the Zinc-Oxide Arrester varistor valve of this example, comprises the steps of
1) dispensing: prepare by the molar percentage of raw material, concrete formula is as follows: ZnO:97.6%, Bi2O3: 0.1%,
B2O3: 0.1%, Y2O3: 0.1%, NiO:0.8%, Cr2O3: 0.1%, Sb2O3: 1.0%, SiO2: 0.1%, MgO:
0.1%；
2) ball milling: by the above-mentioned raw material prepared, by the 2 of raw material weight times, addition deionized water is as dispersant, by raw material
Weight 6% addition concentration be the polyvinyl alcohol water solution of 10wt.% as binding agent, be ground with zirconium oxide abrasive ball, ball
Mill rotating speed is 250r/min, Ball-milling Time 8h；
3) pelletize: the slurry after ball milling is dried, baking temperature 150 DEG C, drying time 36h, by dried block material powder
After broken, cross 40 mesh sieves, add the deionized water accounting for powder weight 10%, stirring, form the aqueous particulate material of mix homogeneously；
4) molding: by 3) in aqueous particulate material use tabletting machine molding, briquetting pressure is 10MPa/cm2, the dwell time
5min；
5) binder removal: by 4) in the varistor element embryo of compression molding to carry out binder removal process, actual temp and the time of control as follows:
Room temperature to 180 DEG C, heating-up time 4h；180 DEG C to 380 DEG C, heating-up time 4h, temperature retention time 3h；Furnace cooling,
Sample after being cooled to room temperature；
6) burn till: use batch-type furnace to carry out normal pressure-sintered Zinc-oxide piezoresistor element embryo after binder removal, when actual temp and control
Between as follows: room temperature to 600 DEG C, heating-up time 5h；600 DEG C to 850 DEG C, heating-up time 2h；850 DEG C to 1200 DEG C,
Heating-up time 3h, temperature retention time 4h；Furnace cooling, samples after being cooled to room temperature；
7) abrasive disc: by 6) in the zinc oxide varistor valve grinding two end surfaces of densified sintering product, use ultrasonic cleaning valve block surface
Greasy dirt, dust and other impurities, be then dried, baking temperature 150 DEG C, drying time, 12h, fully removed in resistor valve sheet
The moisture of absorption；
8) aluminium-plated, upper side insulation: by 7) in resistor valve sheet both ends of the surface spray aluminum electrode, coat low temperature glass in valve block side
Glaze is as side insulation.
The zinc oxide varistor valve preparing test carries out performance test, the pressure-sensitive electricity of obtained varistor valve
Pressure gradient is more than 574V/mm, and square wave discharge capacity is 441J/cm3Above, leakage current 4.91 μ A, nonlinear factor 26.
Embodiment 5
The preparation technology of the Zinc-Oxide Arrester varistor valve of this example, comprises the steps of
1) dispensing: prepare by the molar percentage of raw material, concrete formula is as follows: ZnO:95%, Bi2O3: 1.0%,
B2O3: 1.0%, Y2O3: 1.0%, NiO:0.45%, Cr2O3: 0.3%, Sb2O3: 0.05%, SiO2: 0.7%, MgO:
0.5%；
2) ball milling: by the above-mentioned raw material prepared, by the 2 of raw material weight times, addition deionized water is as dispersant, by raw material
Weight 4% addition concentration be the polyvinyl alcohol water solution of 8wt.% as binding agent, be ground with zirconium oxide abrasive ball, ball milling
Rotating speed is 250r/min, Ball-milling Time 8h；
3) pelletize: the slurry after ball milling is dried, baking temperature 150 DEG C, drying time 36h, by dried block material powder
After broken, cross 40 mesh sieves, add the deionized water accounting for powder weight 10%, stirring, form the aqueous particulate material of mix homogeneously；
4) molding: by 3) in aqueous particulate material use tabletting machine molding, briquetting pressure is 10MPa/cm2, the dwell time
5min；
5) binder removal: by 4) in the varistor element embryo of compression molding to carry out binder removal process, actual temp and the time of control as follows:
Room temperature to 180 DEG C, heating-up time 4h；180 DEG C to 380 DEG C, heating-up time 4h, temperature retention time 3h；Furnace cooling,
Sample after being cooled to room temperature；
6) burn till: use batch-type furnace to carry out normal pressure-sintered Zinc-oxide piezoresistor element embryo after binder removal, when actual temp and control
Between as follows: room temperature to 600 DEG C, heating-up time 5h；600 DEG C to 850 DEG C, heating-up time 2h；850 DEG C to 1200 DEG C,
Heating-up time 3h, temperature retention time 4h；Furnace cooling, samples after being cooled to room temperature；
7) abrasive disc: by 6) in the zinc oxide varistor valve grinding two end surfaces of densified sintering product, use ultrasonic cleaning valve block surface
Greasy dirt, dust and other impurities, be then dried, baking temperature 150 DEG C, drying time, 12h, fully removed in resistor valve sheet
The moisture of absorption；
8) aluminium-plated, upper side insulation: by 7) in resistor valve sheet both ends of the surface spray aluminum electrode, coat low temperature glass in valve block side
Glaze is as side insulation.
The zinc oxide varistor valve preparing test carries out performance test, the pressure-sensitive electricity of obtained varistor valve
Pressure gradient is more than 580V/mm, and square wave discharge capacity is 445J/cm3Above, leakage current 4.83 μ A, nonlinear factor 30.
Above example is only limited in order to technical scheme to be described, those of ordinary skill in the field
Should be appreciated that and can modify the detailed description of the invention of the present invention or equivalent with reference to above-described embodiment, these do not take off
From any amendment of spirit and scope of the invention or equivalent all within the claims that application is awaited the reply.
Claims (9)
1. a spark gap varistor valve, it is characterised in that by mole meter, described resistor valve sheet material is by wrapping
The material including following component prepares: ZnO:90～98%, Bi2O3: 0.05～2.0%, B2O3: 0.05～2.0%, Y2O3:
0.02～1.0%, NiO:0.02～1.0%, Cr2O3: 0.02～1.0%, Sb2O3: 0.05～3.0%, SiO2: 0.01～1.0%,
MgO:0.01～1.0%.
A kind of spark gap varistor valve the most according to claim 1, it is characterised in that described ZnO:
91.1～97.6%, Bi2O3: 0.1～1.5%, B2O3: 0.1～1.5%, Y2O3: 0.1～0.8%, NiO:0.8～1.0%, Cr2O3:
0.1～0.5%, Sb2O3: 1.0～2.0%, SiO2: 0.1～0.8%, MgO:0.1～0.8%.
3. the preparation method of the spark gap varistor valve described in a claim 1, it is characterised in that described preparation side
Method comprises the following steps:
(1) dispensing: prepare by the molar percentage of raw material；
(2) ball milling: grinding with zirconium oxide abrasive ball, rotational speed of ball-mill is 200～250r/min, Ball-milling Time 6～10h；
(3) pelletize: the slurry after ball milling is dried, is pulverized, crosses 20～40 mesh sieves, adds and accounts for powder weight 5～10% go
Ionized water, stirring, mix to obtain aqueous particulate material；
(4) molding: aqueous particulate material described in step (3) is used tabletting machine molding；
(5) binder removal: the varistor element embryo of compression molding in step (4) is carried out binder removal process；
(6) burn till: use batch-type furnace to carry out normal pressure-sintered Zinc-oxide piezoresistor element embryo after step (5) binder removal；
(7) abrasive disc: by the zinc oxide varistor valve grinding two end surfaces of densified sintering product in step (6), uses ultrasonic cleaning
Valve block surface；
(8) aluminium-plated, upper side insulate.
The preparation method of a kind of spark gap varistor valve the most according to claim 3, it is characterised in that described step
Suddenly before (2) are ground, by the 1.5～2 of raw material weight times, addition deionized water is as dispersant, by the 3～6% of raw material weight
Adding concentration is that the polyvinyl alcohol water solution of 5～10wt.% is as binding agent.
The preparation method of a kind of spark gap varistor valve the most according to claim 3, it is characterised in that described step
Suddenly it is dried before (3) pelletize, baking temperature 120～150 DEG C, the time 24～36h.
The preparation method of a kind of spark gap varistor valve the most according to claim 3, it is characterised in that described step
Suddenly in (4), briquetting pressure is 5～10MPa/cm2, the dwell time 2～5min.
The preparation method of a kind of spark gap varistor valve the most according to claim 3, it is characterised in that described step
Suddenly in (5), binder removal treatment temperature and time are as follows: room temperature to 180 DEG C, heating-up time 4h；180 DEG C to 380 DEG C, rise
Temperature time 4h, is incubated 3～4h；Furnace cooling, samples after being cooled to room temperature.
The preparation method of a kind of spark gap varistor valve the most according to claim 3, it is characterised in that described step
Suddenly in (6), sintering temperature and time are as follows: by room temperature to 600 DEG C in 5h；850 DEG C are risen to by 600 DEG C in 2h；
In 3h, rise to 1200 DEG C by 850 DEG C, be incubated 2.5～4h；Furnace cooling, samples after being cooled to room temperature.
The preparation method of a kind of spark gap varistor valve the most according to claim 3, it is characterised in that described step
Suddenly after (7) abrasive disc at 120 DEG C～150 DEG C drying time 8～12h.
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| CN201610509218.9A CN105957666A (en) | 2016-06-30 | 2016-06-30 | Varistor valve plate for lightning arrester and preparation method thereof |
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| CN201610509218.9A CN105957666A (en) | 2016-06-30 | 2016-06-30 | Varistor valve plate for lightning arrester and preparation method thereof |
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| CN108929108A (en) * | 2018-07-30 | 2018-12-04 | 宜宾志源高压电器有限公司 | A kind of production technology measuring arrester zinc oxide resistance sheet |
| CN110078494A (en) * | 2019-03-21 | 2019-08-02 | 全球能源互联网研究院有限公司 | A kind of zinc oxide resistance sheet and preparation method thereof |
| CN110937890A (en) * | 2018-09-25 | 2020-03-31 | 全球能源互联网研究院有限公司 | Varistor for lightning arrester and preparation method thereof |
| CN111499207A (en) * | 2020-04-20 | 2020-08-07 | 北京北旭电子材料有限公司 | Glass powder, valve plate structure and preparation method |
| CN115346743A (en) * | 2022-08-08 | 2022-11-15 | 安徽锦华氧化锌有限公司 | Preparation method of zinc oxide of metal oxide arrester resistance card |
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Application publication date: 20160921 |