CN105622086B - The method for preparing high gradient zinc oxide piezoresistor ceramic - Google Patents
The method for preparing high gradient zinc oxide piezoresistor ceramic Download PDFInfo
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000000919 ceramic Substances 0.000 title claims abstract description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 67
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 48
- UPWOEMHINGJHOB-UHFFFAOYSA-N oxo(oxocobaltiooxy)cobalt Chemical compound O=[Co]O[Co]=O UPWOEMHINGJHOB-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000002002 slurry Substances 0.000 claims abstract description 42
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims abstract description 40
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 22
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 19
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 19
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 19
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 19
- 229910000108 silver(I,III) oxide Inorganic materials 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 238000002360 preparation method Methods 0.000 claims abstract description 15
- 238000005245 sintering Methods 0.000 claims abstract description 15
- 239000004411 aluminium Substances 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 claims abstract description 10
- GHPGOEFPKIHBNM-UHFFFAOYSA-N antimony(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Sb+3].[Sb+3] GHPGOEFPKIHBNM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000000227 grinding Methods 0.000 claims abstract description 8
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 claims abstract description 8
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910000410 antimony oxide Inorganic materials 0.000 claims abstract description 4
- 229910000416 bismuth oxide Inorganic materials 0.000 claims abstract description 4
- 229910000423 chromium oxide Inorganic materials 0.000 claims abstract description 4
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims abstract description 4
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000007493 shaping process Methods 0.000 claims abstract description 4
- 229910001923 silver oxide Inorganic materials 0.000 claims abstract description 4
- 229910002651 NO3 Inorganic materials 0.000 claims abstract 5
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 239000004576 sand Substances 0.000 claims description 26
- 239000008367 deionised water Substances 0.000 claims description 18
- 229910021641 deionized water Inorganic materials 0.000 claims description 18
- 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
- 238000000748 compression moulding Methods 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
- 239000004615 ingredient Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- VDGJOQCBCPGFFD-UHFFFAOYSA-N oxygen(2-) silicon(4+) titanium(4+) Chemical compound [Si+4].[O-2].[O-2].[Ti+4] VDGJOQCBCPGFFD-UHFFFAOYSA-N 0.000 claims 1
- 239000002245 particle Substances 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 7
- 229910052709 silver Inorganic materials 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 150000002500 ions Chemical class 0.000 abstract description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 2
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011268 mixed slurry Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000011701 zinc Substances 0.000 abstract description 2
- 229910052725 zinc Inorganic materials 0.000 abstract description 2
- 229960001296 zinc oxide Drugs 0.000 description 10
- 238000003801 milling Methods 0.000 description 6
- 238000004321 preservation Methods 0.000 description 6
- 238000002242 deionisation method Methods 0.000 description 5
- 239000011236 particulate material Substances 0.000 description 5
- JLDSOYXADOWAKB-UHFFFAOYSA-N aluminium nitrate Chemical compound [Al+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O JLDSOYXADOWAKB-UHFFFAOYSA-N 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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- C04B35/453—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 zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates
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Abstract
A kind of method for preparing high gradient zinc oxide piezoresistor ceramic, preparing raw material includes zinc oxide ZnO, bismuth oxide Bi2O3, antimony oxide Sb2O3, manganese dioxide MnO2, chromium oxide Cr2O3, cobalt sesquioxide Co2O3, silica SiO2, aluminum nitrate Al (NO3) 3, silver oxide Ag2O, and preparation process includes preparing auxiliary addition slurry, addition ZnO, addition aluminium, silver ion, shaping, sintering.Its advantage is：Using traditional raw material mixed grinding technique and sintering process, by adjusting the composition and ratio of adjunct, Al, Ag element are with the addition of simultaneously in ZnO and mixed slurry.Under the collective effect of Al and Ag ions, Al and Ag is dissolved into zinc lattice in sintering process, reduce grain resistance, reduce the residual voltage in high current area, simultaneously so that the quantity of interstitial zinc ions declines, the age stability performance of ZnO varistor ceramics is improved, compared with addition Al ions merely, leakage current is also effectively suppressed.
Description
Technical field
The present invention relates to field of material preparation, particularly a kind of preparation method of zinc oxide piezoresistor ceramic.
Background technology
Zinc-oxide piezoresistor be using ZnO as primary raw material, add a small amount of Bi2O3, Sb2O3, MnO2, Cr2O3,
Co2O3 etc. is used as auxiliary ingredients, is prepared using ceramic sintering process.Due to its excellent nonlinear wind vibration and energy
Absorbability, the metal oxide arrester based on Zinc-oxide piezoresistor become overvoltage protection in modern power systems
Key equipment plays the role of vital for electric system Lightning Impulse Overvoltage Protection, Electric Power Equipment Insulation cooperation.It is same with this
When, the overvoltage protection level of arrester directly determines the dielectric level of power transmission and transforming equipment.Generally 1mA DC currents are acted on
The voltage of lower varistor is known as pressure sensitive voltage U1mA, and the pressure sensitive voltage of unit height is known as pressure-sensitive gradient.Pressure-sensitive gradient is higher,
Then the height of the lower based varistor of identical voltage effect is with regard to smaller..
The content of the invention
The purpose of the present invention is to solve the above problem, devise and a kind of prepare high gradient zinc oxide piezoresistor ceramic
Method.Specifically designing scheme is：
A kind of method for preparing high gradient zinc oxide piezoresistor ceramic, preparing raw material includes zinc oxide ZnO, bismuth oxide
Bi2O3, antimony oxide Sb2O3, manganese dioxide MnO2, chromium oxide Cr2O3, cobalt sesquioxide Co2O3, silica SiO2, nitric acid
Aluminium Al (NO3)3, silver oxide Ag2O, preparation process include prepare auxiliary addition slurry, addition ZnO, addition aluminium, silver ion, shaping,
Sintering.
The molar ratio for respectively preparing raw material is：
ZnO：Bi2O3：Sb2O3：MnO2：Cr2O3：Co2O3：SiO2：Al(NO3)3：Ag2O=88-97.3：0.5-2.0:0.5-
1.5:0.5-1.0:0.5-1.0:0.5-1.5:1.0-2.0:0.1-1.0:0.1-1.0。
It prepares in auxiliary addition slurry stage, ingredient includes Bi2O3、Sb2O3、MnO2、Cr2O3、Co2O3、SiO2, auxiliary adds
Add the preparation method of slurry to add water sand mill, it is 1-3h to add water sand time consuming, and it is deionization to add the water added in water sand grinding process
Water adds in deionized water and adds the quality parts ratio of slurry with the auxiliary as 2 parts of deionized water, auxiliary 1 part of slurry of addition,
The Bi added in2O3、MnO2、Cr2O3、Co2O3、SiO2Molar ratio be:0.5-2.0:0.5-1.5:0.5-1.0:0.5-1.0:
0.5-1.5:1.0-2.0。
The forming step is compression molding, using hydraulic pressure tablet press machine and the cylindrical die of diameter 30mm, by drying
Particulate material compression molding after granulation, briquetting pressure 150MPa, molding time 3min.
It is sintered using high temperature furnace, using the heating rate of 150~250 DEG C/h, high temperature furnace is made to rise to 400 DEG C, 400
Dumping 5h is kept the temperature under DEG C environment, from room temperature to 1150~1250 DEG C of sintering temperature, 3~4h is kept the temperature at a sintering temperature, makes
Ceramic sintered compact.
During adding ZnO, the ZnO of addition and Bi in auxiliary addition slurry2O3Molar ratio be 88-97.3：0.5-2.0,
Mixed sand is carried out after addition ZnO to grind to form slurry, mixed sand time consuming is 0.5-1h, and mixing needs to add in deionization in sand grinding process
Water, the deionized water and the quality parts ratio of slurry added in is 0.5 part of deionized water, 1 part of slurry.
It adds in aluminium, silver ion step, adds in Al (NO3)3、Ag2O adds in Al (NO3)3、Ag2O rubs with ZnO in slurry
You are than being 0.1-1.0:0.1-1.0：88-97.3 add in Al (NO3)3、Ag2Continue to be sanded after O, form powder.
By the method for the preparation high gradient zinc oxide piezoresistor ceramic that the above-mentioned technical proposal of the present invention obtains, have
Beneficial effect is：
Using traditional raw material mixed grinding technique and sintering process, by adjusting the composition and ratio of adjunct,
Al, Ag element are with the addition of in ZnO and mixed slurry simultaneously.Under the collective effect of Al and Ag ions, in sintering process Al and
Ag is dissolved into zinc lattice, reduces grain resistance, is reduced the residual voltage in high current area, while is caused under the quantity of interstitial zinc ions
Drop improves the age stability performance of ZnO varistor ceramics, and compared with addition Al ions merely, leakage current is also had
Effect inhibits.
Specific embodiment
A kind of method for preparing high gradient zinc oxide piezoresistor ceramic, preparing raw material includes zinc oxide ZnO, bismuth oxide
Bi2O3, antimony oxide Sb2O3, manganese dioxide MnO2, chromium oxide Cr2O3, cobalt sesquioxide Co2O3, silica SiO2, nitric acid
Aluminium Al (NO3)3, silver oxide Ag2O, preparation process include prepare auxiliary addition slurry, addition ZnO, addition aluminium, silver ion, shaping,
Sintering.
The molar ratio for respectively preparing raw material is：
ZnO：Bi2O3：Sb2O3：MnO2：Cr2O3：Co2O3：SiO2：Al(NO3)3：Ag2O=88-97.3：0.5-2.0:0.5-
1.5:0.5-1.0:0.5-1.0:0.5-1.5:1.0-2.0:0.1-1.0:0.1-1.0。
It prepares in auxiliary addition slurry stage, ingredient includes Bi2O3、Sb2O3、MnO2、Cr2O3、Co2O3、SiO2, auxiliary adds
Add the preparation method of slurry to add water sand mill, it is 1-3h to add water sand time consuming, and it is deionization to add the water added in water sand grinding process
Water adds in deionized water and adds the quality parts ratio of slurry with the auxiliary as 2 parts of deionized water, auxiliary 1 part of slurry of addition,
The Bi added in2O3、MnO2、Cr2O3、Co2O3、SiO2Molar ratio be:0.5-2.0:0.5-1.5:0.5-1.0:0.5-1.0:
0.5-1.5:1.0-2.0。
The forming step is compression molding, using hydraulic pressure tablet press machine and the cylindrical die of diameter 30mm, by drying
Particulate material compression molding after granulation, briquetting pressure 150MPa, molding time 3min.
It is sintered using high temperature furnace, using the heating rate of 150~250 DEG C/h, high temperature furnace is made to rise to 400 DEG C, 400
Dumping 5h is kept the temperature under DEG C environment, from room temperature to 1150~1250 DEG C of sintering temperature, 3~4h is kept the temperature at a sintering temperature, makes
Ceramic sintered compact.
During adding ZnO, the molar ratio of the ZnO and Bi2O3 in auxiliary addition slurry of addition are 88-97.3：0.5-
2.0, progress mixed sand grinds to form slurry after adding ZnO, and mixed sand time consuming is 0.5-1h, mixes to need to add in sand grinding process and go
Ionized water, the deionized water and the quality parts ratio of slurry added in is 0.5 part of deionized water, 1 part of slurry.
It adds in aluminium, silver ion step, adds in Al (NO3)3、Ag2O adds in Al (NO3)3、Ag2O rubs with ZnO in slurry
You are than being 0.1-1.0:0.1-1.0：88-97.3 add in Al (NO3)3、Ag2Continue to be sanded after O, form powder.
Embodiment one：
1) raw material is prepared
The low residual voltage ZnO varistor ceramic material in the following proportions ZnO (91mol%), Bi2O3 (1.5mol%),
Sb2O3 (1mol%), MnO2 (1mol%), Cr2O3 (1mol%), Co2O3 (1mol%), SiO2 (1.5mol%), Al (NO3)
3 (1mol%), Ag2O (1mol%) prepare initial feed.
2) auxiliary addition slurry is prepared
By Bi2O3 (1.5mol%), Sb2O3 (1mol%), MnO2 (1mol%), Cr2O3 (1mol%), Co2O3
(1mol%) and SiO2 (1.5mol%) are put into horizontal sand mill, add in the deionized water of 1.5 times of powder weight, are sanded 2
Hour.
3) auxiliary addition slurry and ZnO are mixed
The ZnO of 91%mol is added in auxiliary addition slurry after sand milling, adds the deionized water of 0.5 times of powder weight,
All mixed raw materials are mixed, 1 hour is sanded, until being uniformly dispersed.
4) aluminium, silver ion are added
In uniformly mixed ZnO slurries, it is small to continue sand milling 1 by addition Al (NO3) 3 (1mol%), Ag2O (1mol%)
When.
5) it is molded
The powder obtained in previous step is spray-dried, it is aqueous after, use hydraulic pressure tablet press machine and diameter 30mm
Cylindrical die, by particulate material compression molding, briquetting pressure 150MPa, 3 minutes dwell times.
6) it is sintered
With high-temperature electric resistance furnace, sintered body, actual temp and control time are as follows in closed atmosphere：
From room temperature to 400 DEG C, when the heating-up time 2 is small；
When 400 DEG C of heat preservation dumpings 5 are small；
From 400 DEG C to 900 DEG C, when the heating-up time 3 is small；
From 900 DEG C to 1250 DEG C, when the heating-up time 3 is small；
When 1200 DEG C of heat preservations 3 are small；
Temperature fall.
Properties test has been carried out to the ZnO varistor sample being prepared by process above.Its leakage current obtains
To inhibition, average 0.89A/cm2, nonlinear factor average 75, breakdown voltage gradient average 590V/mm, residual voltage ratio average 1.51.
Embodiment two：
1) raw material is prepared
The low residual voltage ZnO varistor ceramic material in the following proportions ZnO (96.3mol%), Bi2O3 (0.5mol%),
Sb2O3 (0.5mol%), MnO2 (0.5mol%), Cr2O3 (0.5mol%), Co2O3 (0.5mol%), SiO2 (1mol%),
Al (NO3) 3 (0.1mol%), Ag2O (0.1mol%) and preparation initial feed.
2) auxiliary addition slurry is prepared
By Bi2O3 (0.5mol%), Sb2O3 (0.5mol%), MnO2 (0.5mol%), Cr2O3 (0.5mol%),
Co2O3 (0.5mol%), SiO2 (1mol%) are put into horizontal sand mill, add in the deionized water of 1.5 times of powder weight, are sanded
2 hours.
3) auxiliary addition slurry and ZnO are mixed
The ZnO of 96.3%mol, the deionization of 1.5 times of addition powder weight are added in auxiliary addition slurry after sand milling
All mixed raw materials are mixed and 1 hour are sanded, until being uniformly dispersed by water.
4) aluminium, silver ion are added
In uniformly mixed ZnO slurries, addition Al (NO3) 3 (0.1mol%), Ag2O (0.1mol%) continue sand milling 1
Hour.
5) it is molded
The powder obtained in previous step is spray-dried, it is aqueous after, use hydraulic pressure tablet press machine and diameter 30mm
Cylindrical die, by particulate material compression molding, briquetting pressure 150MPa, 3 minutes dwell times.
6) it is sintered
With high-temperature electric resistance furnace, sintered body, actual temp and control time are as follows in closed atmosphere：
From room temperature to 400 DEG C, when the heating-up time 2 is small；
When 400 DEG C of heat preservation dumpings 5 are small；
From 400 DEG C to 900 DEG C, when the heating-up time 3 is small；
From 900 DEG C to 1220 DEG C, when the heating-up time 3 is small；
When 1220 DEG C of heat preservations 4 are small；
Temperature fall.
Properties test has been carried out to the ZnO varistor sample being prepared by process above.Its leakage current obtains
To inhibition, average 1.05A/cm2, nonlinear factor average 83, breakdown voltage gradient average 510V/mm, residual voltage ratio average 1.49.
Embodiment three：
1) raw material is prepared
The low residual voltage ZnO varistor ceramic material in the following proportions ZnO (89.5mol%), Bi2O3 (2mol%),
Sb2O3 (1.5mol%), MnO2 (1mol%), Cr2O3 (1mol%), Co2O3 (1.5mol%), SiO2 (2mol%), Al
(NO3) 3 (1mol%), Ag2O (0.5mol%) prepare initial feed.
2) prepare and adjunct is sanded
By Bi2O3 (2mol%), Sb2O3 (1.5mol%), MnO2 (1mol%), Cr2O3 (1mol%), Co2O3
(1.5mol%) and SiO2 (2mol%) are put into horizontal sand mill, add in the deionized water of 1.5 times of powder weight, are sanded 2
Hour.
3) auxiliary addition slurry and ZnO are mixed
The ZnO of 89.5%mol, the deionization of 1.5 times of addition powder weight are added in auxiliary addition slurry after sand milling
All mixed raw materials are mixed and 1 hour are sanded, until being uniformly dispersed by water.
4) aluminium, silver ion are added
In uniformly mixed ZnO slurries, it is small to continue sand milling 1 by addition Al (NO3) 3 (1mol%), Ag2O (0.5mol%)
When.
5) it is molded
The powder obtained in previous step is spray-dried, it is aqueous after, use hydraulic pressure tablet press machine and diameter 30mm
Cylindrical die, by particulate material compression molding, briquetting pressure 150MPa, 3 minutes dwell times.
6) it is sintered
With high-temperature electric resistance furnace, sintered body, actual temp and control time are as follows in closed atmosphere：
From room temperature to 400 DEG C, when the heating-up time 2 is small；
When 400 DEG C of heat preservation dumpings 5 are small；
From 400 DEG C to 900 DEG C, when the heating-up time 3 is small；
From 900 DEG C to 1150 DEG C, when the heating-up time 3 is small；
When 1150 DEG C of heat preservations 3 are small；
Temperature fall.
Properties test has been carried out to the ZnO varistor sample being prepared by process above.Its leakage current obtains
To inhibition, average 0.97A/cm2, nonlinear factor average 83, breakdown voltage gradient average 536V/mm, residual voltage ratio average 1.54.
Above-mentioned technical proposal only embodies the optimal technical scheme of technical solution of the present invention, those skilled in the art
The principle of the present invention is embodied to some variations that some of which part may be made, belongs to the scope of protection of the present invention it
It is interior.
Claims (5)
- A kind of 1. method for preparing high gradient zinc oxide piezoresistor ceramic, which is characterized in that preparing raw material includes zinc oxide ZnO, bismuth oxide Bi2O3, antimony oxide Sb2O3, manganese dioxide MnO2, chromium oxide Cr2O3, cobalt sesquioxide Co2O3, titanium dioxide Silicon SiO2, aluminum nitrate Al (NO3)3, silver oxide Ag2O, preparation process include prepare auxiliary addition slurry, addition ZnO, addition aluminium, Silver ion, shaping, sintering, the molar ratio for respectively preparing raw material are ZnO：Bi2O3：Sb2O3：MnO2：Cr2O3：Co2O3：SiO2：Al (NO3)3：Ag2O=88-97.3：0.5-2.0:0.5-1.5:0.5-1.0:0.5-1.0:0.5-1.5:1.0-2.0:0.1-1.0: 0.1-1.0,It prepares in auxiliary addition slurry stage, ingredient includes Bi2O3、Sb2O3、MnO2、Cr2O3、Co2O3、SiO2, auxiliary addition slurry Preparation method for plus water sand mill, adding water sand time consuming, it is deionized water to add the water added in water sand grinding process, added for 1-3h Enter deionized water and add the quality parts ratio of slurry with the auxiliary as 2 parts of deionized water, auxiliary 1 part of slurry of addition, added in Bi2O3、MnO2、Cr2O3、Co2O3、SiO2Molar ratio be:0.5-2.0:0.5-1.5:0.5-1.0:0.5-1.0:0.5-1.5: 1.0-2.0。
- 2. according to the method for the preparation high gradient zinc oxide piezoresistor ceramic described in claim 1, which is characterized in that described Forming step is compression molding, using hydraulic pressure tablet press machine and the cylindrical die of diameter 30mm, by the particle after drying-granulating Expect compression molding, briquetting pressure 150MPa, molding time 3mi n.
- 3. according to the method for the preparation high gradient zinc oxide piezoresistor ceramic described in claim 1, which is characterized in that use High temperature furnace is sintered, and using the heating rate of 150~250 DEG C/h, high temperature furnace is made to rise to 400 DEG C, is kept the temperature under 400 DEG C of environment Dumping 5h from room temperature to 1150~1250 DEG C of sintering temperature, keeps the temperature 3~4h, makes ceramic sintered compact at a sintering temperature.
- 4. according to the method for the preparation high gradient zinc oxide piezoresistor ceramic described in claim 1, which is characterized in that addition During ZnO, the ZnO of addition and Bi in auxiliary addition slurry2O3Molar ratio be 88-97.3：0.5-2.0, addition ZnO are laggard Row mixing, which is sanded, forms slurry, and mixed sand time consuming is 0.5-1h, and mixing needs to add in deionized water in sand grinding process, is added in Deionized water and the quality parts ratio of slurry are 0.5 part of deionized water, 1 part of slurry.
- 5. according to the method for the preparation high gradient zinc oxide piezoresistor ceramic described in claim 4, which is characterized in that addition In aluminium, silver ion step, Al (NO are added in3)3、Ag2O adds in Al (NO3)3、Ag2The molar ratio of O and ZnO in slurry is 0.1- 1.0:0.1-1.0：88-97.3 add in Al (NO3)3、Ag2Continue to be sanded after O, form powder.
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| CN110615677A (en) * | 2019-09-30 | 2019-12-27 | 厦门松元电子有限公司 | Low-temperature sintered zinc oxide varistor ceramic material, preparation method thereof and preparation method of resistor |
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