CN105777113A - Black ceramic and preparing method thereof - Google Patents
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
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Abstract
The invention discloses black ceramic applied to the field of fingerprint identification products, mobile phone appearance and decorating parts and other related electronic equipment.The black ceramic comprises a ceramic material and dye, and the molar percentage content of the ceramic material and the molar percentage content in the black ceramic are 0.1-99.9% and 0.1-99.9% respectively; the ceramic material is at least one of ZrO2 and Al2O3, wherein ZrO2 at least contains 0-8% mole of Y2O3, and the dye is a transition metal compound.The black ceramic has the advantages of being high in color accuracy, uniform in coloring, high in strength and low in light transmittance and having a smooth surface mirror plane.
Description
Technical field
The present invention relates to a kind of pottery and preparation method thereof, especially a kind of can be used for black ceramics in associated electronic device field such as fingerprint recognition product, cell phone appearance and decoration and preparation method thereof.
Background technology
The excellent characteristics such as ceramic material has that intensity is big, hardness is high, wear-resisting and good corrosion resistance, are widely used in every field, such as cutter, watchcase, mould, phone housing and various ceramic structures etc..In recent years, along with people are to improving constantly that ornament requires, black ceramic with the mechanical performance of its excellence, the tone of bright-coloured elegance, metallic luster and environmental friendliness, nonhazardous without features such as allergy, become the new lover of high-grade furnishing fields, such as pressing type fingerprint recognition ceramic cover plate, the high-grade watchcase of wrist-watch, watch chain, phone housing and senior button etc..But, the black ceramic majority produced at present adopts printing ink printing art, owing to ink for screen printing contains substantial amounts of organic resin, this can cause that ink for screen printing appearance is easy to silk-screen defect occur, the black ceramic prepared easily is occurred problems such as salient point, pit, bubble and surface thickness be uneven, thus causing that ink layer is weak with the interface binding power of pottery interlayer, ceramic material is painted uneven and the problem such as material property is unstable.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art part and provide a kind of painted precisely, the black ceramic of uniform hue, excellent performance；Meanwhile, the preparation method that present invention also offers described black ceramic.
For achieving the above object, the technical scheme that the present invention takes is: a kind of black ceramic, it is characterized in that, described black ceramic comprises ceramic material and dye, described ceramic material molar content in described black ceramic is 0.1%～99.9%, and described dye molar content in described black ceramic is 0.1～99.9%；
Described ceramic material is ZrO2、Al2O3In at least one, wherein ZrO2In including at least the Y of 0～8% mole2O3；
Described dye is magnesium-yttrium-transition metal compound.
The black ceramic of the present invention, described ceramic material adopts ZrO2、Al2O3In at least one, wherein ZrO2In including at least the Y of 0～8% mole2O3, described dye adopts magnesium-yttrium-transition metal compound, and ceramic material is mixed with into ceramic size with dye, and dye is uniformly dispersed in ceramic size so that described ceramic material possess painted precisely, the advantage of uniform hue.
As the preferred implementation of black ceramic of the present invention, described ceramic material is ZrO2And Al2O3Mixture, and ZrO2Weight/mass percentage composition in described ceramic material is 0.1%～99.9%, Al2O3Weight/mass percentage composition in described ceramic material is 0.1%～99.9%.
As the preferred implementation of black ceramic of the present invention, described dye is at least one in transition group metallic oxide, magnesium-yttrium-transition metal nitric acid thing, magnesium-yttrium-transition metal sulphuric acid thing.
As the preferred implementation of black ceramic of the present invention, described transition group metallic oxide is at least one in cobalt oxide, chromium oxide, ferrum oxide, manganese oxide, copper oxide, nickel oxide；
Described magnesium-yttrium-transition metal nitric acid thing is at least one in cobalt nitrate, chromic nitrate, ferric nitrate, manganese nitrate, copper nitrate, nickel nitrate；
Described magnesium-yttrium-transition metal sulphuric acid thing is at least one in cobaltous sulfate, chromic sulfate, iron sulfate, manganese sulfate, copper sulfate, nickel sulfate.
As the more preferably embodiment of black ceramic of the present invention, described transition group metallic oxide is at least one in cobalt oxide, ferrum oxide, copper oxide；
Described magnesium-yttrium-transition metal nitric acid thing is at least one in cobalt nitrate, ferric nitrate, copper nitrate；
Described magnesium-yttrium-transition metal sulphuric acid thing is at least one in cobaltous sulfate, iron sulfate, copper sulfate.
As the preferred implementation of black ceramic of the present invention, described ceramic material molar content in described black ceramic is 30%～90%, and described dye molar content in described black ceramic is 10%～70%.
As the preferred implementation of black ceramic of the present invention, described ceramic material molar content in described black ceramic is 50%～85%, and described dye molar content in described black ceramic is 15%～50%.
As the preferred implementation of black ceramic of the present invention, the thickness of described black ceramic is 0.005mm～100mm, and the surface roughness of described black ceramic is Ra 1 μm.
As the more preferably embodiment of black ceramic of the present invention, the thickness of described black ceramic is 0.005mm～50mm, and the surface roughness of described black ceramic is Ra 0.5 μm.
As the preferred implementation of black ceramic of the present invention, described black ceramic be shaped as triangle, tetragon, polygon, circle, ellipse or track type.
Meanwhile, the present invention also provides for a kind of simple to operate, preparation method of being easily achieved described black ceramic, and for realizing this purpose, the technical scheme that the present invention takes is: the preparation method of a kind of black ceramic described above, comprises the following steps:
(1) ball milling after ceramic material and dye being mixed, obtains finely dispersed black ceramic slurry；
(2) step (1) gained black ceramic slurry is carried out vacuum defoamation under subnormal ambient, then carry out old process；
(3) the black ceramic slurry that step (2) is handled well is shaped, obtains black ceramic biscuit, be sintered after being subsequently processed into definite shape, obtain black ceramic blank；
(4) black ceramic blank step (3) obtained, is polished processing, obtains black ceramic；
Deaeration pressure in described step (2) is-0.01MPa～-0.1MPa；Molding mode in described step (3) is at least one in curtain coating, dry-pressing, extruding and injection moulding, and sintering temperature is 1200 DEG C～1700 DEG C, and temperature retention time is 1h～5h；Polishing mode in described step (4) is at least one in grinding and polishing, machine glazed finish and chemical polishing.
Finally, the present invention also provides for a kind of black ceramic described above purposes in the associated electronic device fields such as fingerprint recognition product, cell phone appearance and decoration.The ceramic material of the present invention possesses good shading effect, surface mirror-smooth and advantage with low cost, can be widely applied in the associated electronic device fields such as fingerprint recognition product, cell phone appearance and decoration.
In the black ceramic of the present invention, described dye is directly mixed with ceramic material, then ceramic size is prepared into, compared with existing black ceramic, dye is owing to being blended directly in ceramic material, make that described black ceramic not only color precision is high, uniform coloring, but also there is the advantages such as intensity height, light transmittance are low and with low cost.The preparation method of black ceramic of the present invention, compared with the preparation method of existing black ceramic, not only simple to operate, be easily achieved, and the black ceramic prepared possesses the advantages such as color precision height, uniform coloring, surface mirror-smooth.The ceramic material of the present invention purposes in the associated electronic device fields such as fingerprint recognition product, cell phone appearance and decoration, provides new ceramic material for associated electronic devices such as fingerprint recognition product, cell phone appearance and decorations and selects.
Detailed description of the invention
For better illustrating the object, technical solutions and advantages of the present invention, below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
A kind of embodiment of black ceramic of the present invention, black ceramic described in the present embodiment comprises the composition of following molar content: ceramic material 0.1%, dye 99.9%；Wherein said ceramic material is ZrO2, described dye is ferrum oxide.
Black ceramic described in the present embodiment adopts following methods to be prepared from:
(1) ball milling after ceramic material and dye being mixed, obtains finely dispersed black ceramic slurry；
(2) step (1) gained black ceramic slurry is carried out vacuum defoamation under-0.01MPa, then carry out old process；
(3) the black ceramic slurry that step (2) is handled well being carried out injection mo(u)lding, obtain black ceramic biscuit, be sintered after being subsequently processed into triangle, sintering temperature is 1200 DEG C, and temperature retention time is 5h, obtains black ceramic blank；
(4) black ceramic blank step (3) obtained, is ground polishing, obtains thickness to be 0.005mm, surface roughness be the triangle black ceramic of Ra=1 μm.
Embodiment 2
A kind of embodiment of black ceramic of the present invention, black ceramic described in the present embodiment comprises the composition of following molar content: ceramic material 30%, dye 70%；Wherein said ceramic material is Al2O3, described dye is cobalt nitrate.
Black ceramic described in the present embodiment adopts following methods to be prepared from:
(1) ball milling after ceramic material and dye being mixed, obtains finely dispersed black ceramic slurry；
(2) step (1) gained black ceramic slurry is carried out vacuum defoamation under-0.1MPa, then carry out old process；
(3) being undertaken dry-pressing formed by the black ceramic slurry that step (2) is handled well, obtain black ceramic biscuit, be sintered after being subsequently processed into circle, sintering temperature is 1700 DEG C, and temperature retention time is 1h, obtains black ceramic blank；
(4) black ceramic blank step (3) obtained, carries out machine glazed finish, obtains thickness to be 100mm, surface roughness be the circular black pottery of Ra=0.8 μm.
Embodiment 3
A kind of embodiment of black ceramic of the present invention, black ceramic described in the present embodiment comprises the composition of following molar content: ceramic material 50%, dye 50%；Wherein said ceramic material is ZrO2(comprise the Y of 3% mole2O3), described dye is copper oxide.
Black ceramic described in the present embodiment adopts following methods to be prepared from:
(1) ball milling after ceramic material and dye being mixed, obtains finely dispersed black ceramic slurry；
(2) step (1) gained black ceramic slurry is carried out vacuum defoamation under-0.06MPa, then carry out old process；
(3) the black ceramic slurry that step (2) is handled well being carried out flow casting molding, obtain black ceramic biscuit, be sintered after being subsequently processed into polygon, sintering temperature is 1500 DEG C, and temperature retention time is 3h, obtains black ceramic blank；
(4) black ceramic blank step (3) obtained, carries out chemical polishing, obtains thickness to be 50mm, surface roughness be the polygon black ceramic of Ra=0.5 μm.
Embodiment 4
A kind of embodiment of black ceramic of the present invention, black ceramic described in the present embodiment comprises the composition of following molar content: ceramic material 99.9%, dye 0.1%；Wherein said ceramic material is Al2O3, described dye is the mixture (mass ratio of ferrum oxide, ferric nitrate and iron sulfate is 1:1:1) of ferrum oxide, ferric nitrate and iron sulfate.
Black ceramic described in the present embodiment adopts following methods to be prepared from:
(1) ball milling after ceramic material and dye being mixed, obtains finely dispersed black ceramic slurry；
(2) step (1) gained black ceramic slurry is carried out vacuum defoamation under-0.06MPa, then carry out old process；
(3) being undertaken extruded by the black ceramic slurry that step (2) is handled well, obtain black ceramic biscuit, be sintered after being subsequently processed into tetragon, sintering temperature is 1400 DEG C, and temperature retention time is 4h, obtains black ceramic blank；
(4) black ceramic blank step (3) obtained, is ground polishing, obtains thickness to be 20mm, surface roughness be the tetragon black ceramic of Ra=0.35 μm.
Embodiment 5
Test arranges 12 groups, respectively test group 1～12, and the composition of the black ceramic of test group 1～12 and content are as follows respectively:
The black ceramic of test group 1 comprises the composition of following molar content: ceramic material 0.1%, dye 99.9%；Wherein said ceramic material is ZrO2, and described ZrO2In the Y of 8% mole2O3, described dye is ferrum oxide；
The black ceramic of test group 2 comprises the composition of following molar content: ceramic material 30%, dye 70%；Wherein said ceramic material is Al2O3, described dye is cobalt nitrate.
The black ceramic of test group 3 comprises the composition of following molar content: ceramic material 40%, dye 60%；Wherein said ceramic material is ZrO2And Al2O3Mixture (wherein, ZrO2Weight/mass percentage composition in ceramic material is 0.1%, Al2O3Weight/mass percentage composition in ceramic material is 99.9%), described dye is copper sulfate.
The black ceramic of test group 4 comprises the composition of following molar content: ceramic material 50%, dye 50%；Wherein said ceramic material is ZrO2And Al2O3Mixture (wherein, ZrO2Weight/mass percentage composition in ceramic material is 50%, Al2O3Weight/mass percentage composition in ceramic material is 50%), described dye is copper oxide.
The black ceramic of test group 5 comprises the composition of following molar content: ceramic material 60%, dye 40%；Wherein said ceramic material is ZrO2And Al2O3Mixture (wherein, ZrO2Weight/mass percentage composition in ceramic material is 30%, Al2O3Weight/mass percentage composition in ceramic material is 70%), described dye is the mixture (mass ratio of manganese oxide and nickel oxide is 1:1) of manganese oxide and nickel oxide.
The black ceramic of test group 6 comprises the composition of following molar content: ceramic material 70%, dye 30%；Wherein said ceramic material is ZrO2And Al2O3Mixture (wherein, ZrO2Weight/mass percentage composition in ceramic material is 60%, Al2O3Weight/mass percentage composition in ceramic material is 40%), described dye is the mixture (mass ratio of cobalt oxide and ferric nitrate is 3:1) of cobalt oxide and ferric nitrate.
The black ceramic of test group 7 comprises the composition of following molar content: ceramic material 80%, dye 20%；Wherein said ceramic material is ZrO2And Al2O3Mixture (wherein, ZrO2Weight/mass percentage composition in ceramic material is 70%, Al2O3Weight/mass percentage composition in ceramic material is 30%), described dye is the mixture (mass ratio of chromium oxide and manganese sulfate is 2:1) of chromium oxide and manganese sulfate.
The black ceramic of test group 8 comprises the composition of following molar content: ceramic material 85%, dye 15%；Wherein said ceramic material is ZrO2And Al2O3Mixture (wherein, ZrO2Weight/mass percentage composition in ceramic material is 80%, Al2O3Weight/mass percentage composition in ceramic material is 20%), described dye is the mixture (mass ratio of copper nitrate and nickel nitrate is 1:1) of copper nitrate and nickel nitrate.
The black ceramic of test group 9 comprises the composition of following molar content: ceramic material 90%, dye 10%；Wherein said ceramic material is ZrO2And Al2O3Mixture (wherein, ZrO2Weight/mass percentage composition in ceramic material is 85%, Al2O3Weight/mass percentage composition in ceramic material is 15%), described dye is the mixture (mass ratio of manganese nitrate and copper sulfate is 4:1) of manganese nitrate and copper sulfate.
The black ceramic of test group 10 comprises the composition of following molar content: ceramic material 92%, dye 8%；Wherein said ceramic material is ZrO2And Al2O3Mixture (wherein, ZrO2Weight/mass percentage composition in ceramic material is 90%, Al2O3Weight/mass percentage composition in ceramic material is 10%), described dye is the mixture (mass ratio of chromic sulfate and nickel sulfate is 1:3) of chromic sulfate and nickel sulfate.
The black ceramic of test group 11 comprises the composition of following molar content: ceramic material 96%, dye 4%；Wherein said ceramic material is ZrO2And Al2O3Mixture (wherein, ZrO2Weight/mass percentage composition in ceramic material is 99.9%, Al2O3Weight/mass percentage composition in ceramic material is 0.1%), described dye is the mixture (mass ratio of copper oxide, chromic nitrate and manganese sulfate is 5:3:2) of copper oxide, chromic nitrate and manganese sulfate.
The black ceramic of test group 12 comprises the composition of following molar content: ceramic material 99.9%, dye 0.1%；Wherein said ceramic material is Al2O3, described dye is the mixture (mass ratio of ferrum oxide, ferric nitrate and iron sulfate is 1:1:1) of ferrum oxide, ferric nitrate and iron sulfate.
The black ceramic of above-mentioned test group 1～12 all adopts the method for the present invention to be prepared from.
The black ceramic of above-mentioned test group 1～12 being carried out performance test, tests its four point bending strength and light transmittance respectively, method of testing is shown in national standard, and test result is table 1 below such as.
Table 1 black ceramic the performance test results
| Group | Four point bending strength (MPa) | Light transmittance/% |
| Test group 1 | 826 | 1.62 |
| Test group 2 | 628 | 1.91 |
| Test group 3 | 640 | 1.97 |
| Test group 4 | 815 | 1.13 |
| Test group 5 | 684 | 1.85 |
| Test group 6 | 697 | 1.89 |
| Test group 7 | 725 | 1.93 |
| Test group 8 | 742 | 1.84 |
| Test group 9 | 751 | 1.88 |
| Test group 10 | 784 | 1.90 |
| Test group 11 | 815 | 1.92 |
| Test group 12 | 623 | 1.87 |
Being can be seen that by table 1 result, the black ceramic of the present invention has higher intensity, and light transmittance is relatively low simultaneously, and the especially black ceramic of test group 4 has low-down light transmittance.
Finally be should be noted that; above example is only in order to illustrate technical scheme but not limiting the scope of the invention; although the present invention being explained in detail with reference to preferred embodiment; it will be understood by those within the art that; technical scheme can be modified or equivalent replacement, without deviating from the spirit and scope of technical solution of the present invention.
Claims (9)
1. a black ceramic, it is characterized in that, described black ceramic comprises ceramic material and dye, and described ceramic material molar content in described black ceramic is 0.1%～99.9%, and described dye molar content in described black ceramic is 0.1%～99.9%；
Described ceramic material is ZrO2、Al2O3In at least one, wherein ZrO2In including at least the Y of 0～8% mole2O3；
Described dye is magnesium-yttrium-transition metal compound.
2. black ceramic as claimed in claim 1, it is characterised in that described ceramic material is ZrO2And Al2O3Mixture, and ZrO2Weight/mass percentage composition in described ceramic material is 0.1%～99.9%, Al2O3Weight/mass percentage composition in described ceramic material is 0.1%～99.9%.
3. black ceramic as claimed in claim 1 or 2, it is characterised in that described dye is at least one in transition group metallic oxide, magnesium-yttrium-transition metal nitric acid thing and magnesium-yttrium-transition metal sulphuric acid thing.
4. black ceramic as claimed in claim 3, it is characterised in that described transition group metallic oxide is at least one in cobalt oxide, chromium oxide, ferrum oxide, manganese oxide, copper oxide, nickel oxide；
Described magnesium-yttrium-transition metal nitric acid thing is at least one in cobalt nitrate, chromic nitrate, ferric nitrate, manganese nitrate, copper nitrate and nickel nitrate；
Described magnesium-yttrium-transition metal sulphuric acid thing is at least one in cobaltous sulfate, chromic sulfate, iron sulfate, manganese sulfate, copper sulfate and nickel sulfate.
5. black ceramic as claimed in claim 1, it is characterised in that described ceramic material molar content in described black ceramic is 30%～90%, and described dye molar content in described black ceramic is 10%～70%.
6. black ceramic as claimed in claim 5, it is characterised in that described ceramic material molar content in described black ceramic is 50%～85%, and described dye molar content in described black ceramic is 15%～50%.
7. the black ceramic as described in any one of claim 1～6, it is characterised in that the thickness of described black ceramic is 0.005mm～100mm, the surface roughness of described black ceramic is Ra 1 μm.
8. the preparation method of black ceramic as described in any one of claim 1～7, it is characterised in that comprise the following steps:
(1) ball milling after ceramic material and dye being mixed, obtains finely dispersed black ceramic slurry；
(2) step (1) gained black ceramic slurry is carried out vacuum defoamation under subnormal ambient, then carry out old process；
(3) the black ceramic slurry that step (2) is handled well is shaped, obtains black ceramic biscuit, be sintered after being subsequently processed into definite shape, obtain black ceramic blank；
(4) black ceramic blank step (3) obtained, is polished processing, obtains black ceramic；
Deaeration pressure in described step (2) is-0.01MPa～-0.1MPa；Molding mode in described step (3) is at least one in curtain coating, dry-pressing, extruding and injection moulding, and sintering temperature is 1200 DEG C～1700 DEG C, and temperature retention time is 1h～5h；Polishing mode in described step (4) is at least one in grinding and polishing, machine glazed finish and chemical polishing.
9. a black ceramic purposes in fingerprint recognition product, cell phone appearance and decoration as described in any one of claim 1～7.
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Cited By (6)
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| CN106348751A (en) * | 2016-08-30 | 2017-01-25 | 重庆派乐精细陶瓷有限公司 | Method for preparing fingerprint recognition module ceramic cover plate |
| CN107043254A (en) * | 2017-05-19 | 2017-08-15 | 内蒙古科技大学 | A kind of black zirconia ceramics and preparation method thereof |
| CN107555989A (en) * | 2017-09-12 | 2018-01-09 | 潮州三环（集团）股份有限公司 | A kind of black zirconia ceramics and preparation method thereof |
| CN109111760A (en) * | 2018-07-12 | 2019-01-01 | 江西赛瓷材料有限公司 | A kind of alumina ceramic of black color toner and its preparation method and application |
| CN110723977A (en) * | 2019-08-23 | 2020-01-24 | 东北大学秦皇岛分校 | With Cu2+Formation of black CuAl in alumina porcelain2O4Method for preparing black alumina ceramic by using main colorant |
| CN113999044A (en) * | 2021-11-12 | 2022-02-01 | 郑州磨料磨具磨削研究所有限公司 | Porous ceramic plate and preparation method thereof |
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| CN106348751A (en) * | 2016-08-30 | 2017-01-25 | 重庆派乐精细陶瓷有限公司 | Method for preparing fingerprint recognition module ceramic cover plate |
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| CN109111760A (en) * | 2018-07-12 | 2019-01-01 | 江西赛瓷材料有限公司 | A kind of alumina ceramic of black color toner and its preparation method and application |
| CN109111760B (en) * | 2018-07-12 | 2020-11-27 | 江西赛瓷材料有限公司 | Black alumina ceramic color agent and preparation method and application thereof |
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| CN113999044A (en) * | 2021-11-12 | 2022-02-01 | 郑州磨料磨具磨削研究所有限公司 | Porous ceramic plate and preparation method thereof |
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