CN108546121A - Zirconium oxide anti-static ceramic and preparation method thereof - Google Patents
Zirconium oxide anti-static ceramic and preparation method thereof Download PDFInfo
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Abstract
The present invention proposes a kind of zirconium oxide anti-static ceramic and preparation method thereof, according to the number of parts by weight, including following raw material：3~6 parts of 60~80 parts of yttrium stable zirconium oxide, 5~10 parts of aluminium oxide, 2~6 parts of magnesia, 1~3 part of titanium dioxide, 6~12 parts of modified oxidized praseodymium and chromium oxide；The modified oxidized praseodymium is mainly prepared by praseodymium oxide, graphite and silica.Preparation method：Binder is added after above-mentioned raw materials are mixed evenly, is granulated, obtains spherical particle；By spherical particle as compression moulding in mold, hot repressing is degreasing sintered, then cools to room temperature.The ceramics not only have a good anti-static effect, also tool have good wearability, high temperature resistance etc..
Description
Technical field
The invention belongs to technical field of ceramic material, and in particular to a kind of zirconium oxide anti-static ceramic and preparation method thereof.
Background technology
Zirconia ceramics material has hardness height, high temperature resistant, wear-resistant, corrosion-resistant, antimagnetic, the characteristics such as insulation.But due to
The factor of environment temperature, humidity and this body structure, in some special cases, zirconia ceramics material, which has, makes electric current pass through
Property, it is possible to create electric conductivity, there are electrostatic.Therefore, the essence of zirconia ceramics material determines use environment.Improve oxygen
Change zircon ceramic material antistatic performance, and the further hardness of General Promotion zirconia ceramics material, abrasion resistance properties, corrosion resistant
Corrosion can wait, so that it is widely used in more harsh environment, it is always that those skilled in the art's technology to be solved is asked
Topic.
About anti-static ceramic, scholar both domestic and external has done excessive quantifier elimination work, and United States Patent (USP) US5525135 is proposed
A kind of anti-electrostatic ceramic material of α-Al2O3-ZrO2-TiO2 systems, meanwhile, which has relatively high resistance to
Grind performance.Improve the anti-of zirconia ceramics by introducing corresponding additive in formula system in addition, there are also patents
Antistatic property.Such as：US4110260 reduces resistivity by introducing silica in zirconia ceramics with titanium dioxide, most
The ceramics with anti-static function are obtained eventually.
A large amount of research has also been made in Chinese patent, and Chinese patent is concentrated mainly in this block field of anti-static ceramic at present
In terms of antistatic ceramic floor brick, such as application No. is 201010563879.2 patent applications, disclose a kind of antistatic pottery
Ceramic tile, it is the building ceramic tiles formed based on glass phase, quartzy phase, enstatite phase, and is mixed up in the Ceramic Tiles
There is conductor oxidate, constitutes anti-static ceramic tile.And claim generated product have fire prevention, service life it is long, it is moisture-proof,
Waterproof, it is mothproof the features such as, and production method simple possible is conducive to industrialized production.
However, antistatic ceramic floor brick, purposes are relatively limited to, function is more single, is concentrated mainly on antistatic and changes
In property, for the anti-electrostatic ceramic material with wide application prospect, from the point of view of current technology situation, also have focused largely on anti-
Electrostatic function does not take into account other performances, such as hardness, abrasion resistance properties, corrosion resistance on being modified.
Invention content
The present invention proposes that a kind of zirconium oxide anti-static ceramic, the ceramics not only have good anti-static effect, also have
Good wearability, high temperature resistance etc..
The technical proposal of the invention is realized in this way：
A kind of zirconium oxide anti-static ceramic, according to the number of parts by weight, including following raw material：
60~80 parts of yttrium stable zirconium oxide, 5~10 parts of aluminium oxide, 2~6 parts of magnesia, 1~3 part of titanium dioxide, modified oxygen
Change 3~6 parts of 6~12 parts of praseodymium and chromium oxide；The modified oxidized praseodymium is mainly prepared by praseodymium oxide, graphite and silica.
Preferably, the preparation method of the modified oxidized praseodymium, includes the following steps：
1) praseodymium oxide is dissolved in after being stirred evenly in citric acid, graphite is added and carries out ball milling, obtains suspension；
2) silica is added to the suspension of step 1), stirs and is warming up to 60~70 DEG C, add silane coupling agent
2~4h is reacted, then filtration drying.
Preferably, the mass ratio of the praseodymium oxide and the citric acid is 1:10~20, the praseodymium oxide and the stone
The mass ratio of ink is 1:0.2~0.8, the mass ratio of the praseodymium oxide and the silica is 1:1~1.5, described two
The mass ratio of silica and the silane coupling agent is 15~20:1.
Preferably, the silane coupling agent is KH550 or KH560.
Preferably, the content of the yttrium in the yttrium stable zirconium oxide is 4~6mol%.
It is a further object to provide a kind of preparation methods of zirconium oxide anti-static ceramic, include the following steps：
1) yttrium stable zirconium oxide, aluminium oxide, magnesia, titanium dioxide, modified oxidized praseodymium and chromium oxide are weighed according to proportioning,
Then it is mixed and is sanded again, obtain mixture；
2) binder is added into mixture, is granulated, and spherical particle is obtained；
3) by the spherical particle of step 2) as compression moulding in mold, hot repressing is degreasing sintered, then cools to room temperature
.
Preferably, in step 3), the degreasing sintered sintering condition of hot pressing is：Sintering temperature is 500 DEG C~1300 DEG C；Heating
Rate is 2 DEG C/min~6 DEG C/min；Sintering pressure is 20MPa~35MPa；The heat-insulation pressure keeping time is 2h~6h.
Preferably, in step 3), sintering environment is vacuum environment or inert gas atmosphere environment.
Beneficial effects of the present invention：
The use of the present invention is mainly prepared modified oxidized praseodymium by praseodymium oxide, graphite and silica and can improve very well
Ceramics antistatic performance, in addition crocking resistance be also improved, fracture toughness also very it is good.In electronic ceramics, function
There is preferable application prospect in ceramics, bioceramic field and cutter, field of tool.
Specific implementation mode
Embodiment 1
The preparation method of modified oxidized praseodymium, includes the following steps：
1) praseodymium oxide is dissolved in after being stirred evenly in citric acid, graphite is added and carries out ball milling, obtains suspension；
2) silica is added to the suspension of step 1), stirs and is warming up to 60 DEG C, add KH560 reaction 4h, so
Filtration drying afterwards.The mass ratio of praseodymium oxide and citric acid is 1:10, the mass ratio of praseodymium oxide and graphite is 1:0.8,
The mass ratio of praseodymium oxide and silica is 1:1, the mass ratio of silica and KH560 are 15：1.
Embodiment 2
The preparation method of modified oxidized praseodymium, includes the following steps：
1) praseodymium oxide is dissolved in after being stirred evenly in citric acid, graphite is added and carries out ball milling, obtains suspension；
2) silica is added to the suspension of step 1), stirs and is warming up to 70 DEG C, add KH550 reaction 2h, so
Filtration drying afterwards.The mass ratio of praseodymium oxide and citric acid is 1:20, the mass ratio of praseodymium oxide and graphite is 1:0.2,
The mass ratio of praseodymium oxide and silica is 1:1.5, the mass ratio of silica and KH550 are 20:1.
Embodiment 3
A kind of zirconium oxide anti-static ceramic, according to the number of parts by weight, including following raw material：
The modified oxidized praseodymium of 70 parts of yttrium stable zirconium oxide, 6 parts of aluminium oxide, 4 parts of magnesia, 2 parts of titanium dioxide, embodiment 1
10 parts and 4 parts of chromium oxide.
The preparation method of zirconium oxide anti-static ceramic, includes the following steps：
1) the modified oxidized praseodymium of yttrium stable zirconium oxide, aluminium oxide, magnesia, titanium dioxide, embodiment 1 is weighed according to proportioning
And chromium oxide, it is then mixed and is sanded again, obtain mixture；
2) 0.5wt% poly-vinyl alcohol solutions are added into mixture, are granulated, and spherical particle is obtained；
3) by the spherical particle of step 2) as compression moulding in mold, hot repressing is degreasing sintered, then cools to room temperature
.The degreasing sintered sintering condition of hot pressing is：Sintering temperature is 500 DEG C；Heating rate is 2 DEG C/min；Sintering pressure is
20MPa；The heat-insulation pressure keeping time is 6h.Sintering environment is inert gas atmosphere environment.
Through integration test：
1, this anti-static ceramic product Vickers hardness HRA is 90, and in 600 DEG C long-term continuous use 8 months, surface did not occurred
Uneven equal wear phenomenons.
2, this anti-static ceramic product is placed in the concentrated sulfuric acid (concentration 98%) and is impregnated 48 hours, slag-off phenomenon do not occur.
Embodiment 4
A kind of zirconium oxide anti-static ceramic, according to the number of parts by weight, including following raw material：
The modified oxidized praseodymium of 60 parts of yttrium stable zirconium oxide, 10 parts of aluminium oxide, 2 parts of magnesia, 3 parts of titanium dioxide, embodiment 2
6 parts and 3 parts of chromium oxide.
The preparation method of zirconium oxide anti-static ceramic, includes the following steps：
1) the modified oxidized praseodymium of yttrium stable zirconium oxide, aluminium oxide, magnesia, titanium dioxide, embodiment 2 is weighed according to proportioning
And chromium oxide, it is then mixed and is sanded again, obtain mixture；
2) 0.5wt% poly-vinyl alcohol solutions are added into mixture, are granulated, and spherical particle is obtained；
3) by the spherical particle of step 2) as compression moulding in mold, hot repressing is degreasing sintered, then cools to room temperature
.The degreasing sintered sintering condition of hot pressing is：Sintering temperature is 1000 DEG C；Heating rate is 6 DEG C/min；Sintering pressure is
35MPa；The heat-insulation pressure keeping time is 2h.Sintering environment is vacuum environment.
Through integration test：
1, this anti-static ceramic product Vickers hardness HRA is 90, and in 600 DEG C long-term continuous use 8 months, surface did not occurred
Uneven equal wear phenomenons.
2, this anti-static ceramic product is placed in the concentrated sulfuric acid (concentration 98%) and is impregnated 48 hours, slag-off phenomenon do not occur.
Embodiment 5
A kind of zirconium oxide anti-static ceramic, according to the number of parts by weight, including following raw material：
The modified oxidized praseodymium of 80 parts of yttrium stable zirconium oxide, 5 parts of aluminium oxide, 6 parts of magnesia, 1 part of titanium dioxide, embodiment 1
12 parts and 6 parts of chromium oxide.
The preparation method of zirconium oxide anti-static ceramic, includes the following steps：
1) the modified oxidized praseodymium of yttrium stable zirconium oxide, aluminium oxide, magnesia, titanium dioxide, embodiment 1 is weighed according to proportioning
And chromium oxide, it is then mixed and is sanded again, obtain mixture；
2) 0.5wt% poly-vinyl alcohol solutions are added into mixture, are granulated, and spherical particle is obtained；
3) by the spherical particle of step 2) as compression moulding in mold, hot repressing is degreasing sintered, then cools to room temperature
.The degreasing sintered sintering condition of hot pressing is：Sintering temperature is 1300 DEG C；Heating rate is 4 DEG C/min；Sintering pressure is
25MPa；The heat-insulation pressure keeping time is 4h.Sintering environment is vacuum environment.
Through integration test：
1, this anti-static ceramic product Vickers hardness HRA is 90, and in 600 DEG C long-term continuous use 8 months, surface did not occurred
Uneven equal wear phenomenons.
2, this anti-static ceramic product is placed in the concentrated sulfuric acid (concentration 98%) and is impregnated 48 hours, slag-off phenomenon do not occur.
Test example
By the anti-static ceramic product measured resistivity of embodiment 3-5, the resistivity of the product of each embodiment is all higher than
In 1 × 104Ω cm but be less than 1 × 1011Ω cm's, there is anti-static effect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (8)
1. a kind of zirconium oxide anti-static ceramic, which is characterized in that according to the number of parts by weight, including following raw material：
60~80 parts of yttrium stable zirconium oxide, 5~10 parts of aluminium oxide, 2~6 parts of magnesia, 1~3 part of titanium dioxide, modified oxidized praseodymium
6~12 parts and 3~6 parts of chromium oxide；The modified oxidized praseodymium is mainly prepared by praseodymium oxide, graphite and silica.
2. zirconium oxide anti-static ceramic according to claim 1, which is characterized in that the preparation side of the modified oxidized praseodymium
Method includes the following steps：
1) praseodymium oxide is dissolved in after being stirred evenly in citric acid, graphite is added and carries out ball milling, obtains suspension；
2) silica is added to the suspension of step 1), stirs and is warming up to 60~70 DEG C, add silane coupling agent reaction 2
~4h, then filtration drying.
3. zirconium oxide anti-static ceramic according to claim 2, which is characterized in that the praseodymium oxide and the citric acid
Mass ratio is 1:10~20, the mass ratio of the praseodymium oxide and the graphite is 1:0.2~0.8, the praseodymium oxide and institute
The mass ratio for stating silica is 1:1~1.5, the mass ratio of the silica and the silane coupling agent is 15~
20:1。
4. zirconium oxide anti-static ceramic according to claim 2, which is characterized in that the silane coupling agent be KH550 or
Person KH560.
5. zirconium oxide anti-static ceramic according to claim 1, which is characterized in that yttrium in the yttrium stable zirconium oxide
Content is 4~6mol%.
6. the preparation method of zirconium oxide anti-static ceramic as described in claim 1, which is characterized in that include the following steps：
1) yttrium stable zirconium oxide, aluminium oxide, magnesia, titanium dioxide, modified oxidized praseodymium and chromium oxide are weighed according to proportioning, then
It is mixed and is sanded again, obtain mixture；
2) binder is added into mixture, is granulated, and spherical particle is obtained；
3) by the spherical particle of step 2) as compression moulding in mold, hot repressing is degreasing sintered, then cools to room temperature.
7. the preparation method of zirconium oxide anti-static ceramic according to claim 6, which is characterized in that in step 3), hot pressing
Degreasing sintered sintering condition is：Sintering temperature is 500 DEG C~1300 DEG C；Heating rate is 2 DEG C/min~6 DEG C/min；Sintering
Pressure is 20MPa~35MPa；The heat-insulation pressure keeping time is 2h~6h.
8. the preparation method of zirconium oxide anti-static ceramic according to claim 6, which is characterized in that in step 3), sintering
Environment is vacuum environment or inert gas atmosphere environment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113135751A (en) * | 2021-05-20 | 2021-07-20 | 宜兴市九荣特种陶瓷有限公司 | Anti-static titanium oxide ceramic and preparation method thereof |
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| US20110070441A1 (en) * | 2008-02-07 | 2011-03-24 | Kyocera Corporation | Zirconia Sintered Body and Production Method the Same |
| CN104341150A (en) * | 2014-09-12 | 2015-02-11 | 李正国 | Anti-static zirconia ceramic and preparation process thereof |
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Application publication date: 20180918 |