CN213506607U - High fine and close zirconia ceramic backplate structure - Google Patents
High fine and close zirconia ceramic backplate structure Download PDFInfo
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- CN213506607U CN213506607U CN202021982647.6U CN202021982647U CN213506607U CN 213506607 U CN213506607 U CN 213506607U CN 202021982647 U CN202021982647 U CN 202021982647U CN 213506607 U CN213506607 U CN 213506607U
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Abstract
The utility model discloses a high fine and close zirconia ceramic backplate structure, including zirconia body layer, zirconia body layer is the stacked structure on a plurality of layers, is provided with the aluminium oxide phase transition layer between the adjacent zirconia body layer, is provided with the magnesium aluminum silicate articulamentum between zirconia body layer and the aluminium oxide phase transition layer. The utility model discloses a high fine and close zirconia ceramic backplate structure has the characteristics that compactness is high, machinability is strong and comprehensive properties is excellent.
Description
Technical Field
The utility model relates to a cell-phone ceramic backplate technical field specifically indicates a high fine and close zirconia ceramic backplate structure.
Background
Along with the rapid development of science and technology, people also are higher and higher to electronic product's requirement, and wherein the consumer is also higher and higher to the requirement of cell-phone backplate quality and outward appearance, because zirconia ceramic has characteristics such as the wearability is good, the hardness is high, the thermal diffusivity is strong, the penetrating power is strong, therefore receives manufacturers' favor. However, the existing zirconia ceramic back plate has the defects of common compactness in the processing process, more ball-closed pores exist, and pits exist on the surface after polishing, so that the processability of the zirconia ceramic back plate is seriously influenced, and the application of the zirconia ceramic back plate is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high fine and close zirconia ceramic backplate structure has the characteristics that compactness is high, machinability is strong and comprehensive properties is excellent.
The utility model discloses can realize through following technical scheme:
the utility model discloses a high fine and close zirconia ceramic backplate structure, including zirconia body layer, zirconia body layer is the stacked structure on a plurality of layers, is provided with the aluminium oxide phase transition layer between the adjacent zirconia body layer, is provided with the magnesium aluminum silicate articulamentum between zirconia body layer and the aluminium oxide phase transition layer.
The preparation method of the zirconia ceramic backboard of the utility model comprises the following steps:
s1, preparation of zirconia slurry: adding a dispersing agent, a binder and a lubricant into the nano zirconia powder, and uniformly stirring to obtain zirconia slurry;
s2, preparing aluminum magnesium silicate slurry: adding polyvinyl alcohol into the aluminum magnesium metasilicate particles, and uniformly stirring to obtain aluminum magnesium silicate slurry;
s3, preparation of alumina slurry: dissolving the aluminum sol, the alumina and the conversion mineralizer in water under the condition of stirring and fully mixing to obtain slurry:
s4, laminating and molding: respectively injecting zirconia slurry, aluminum magnesium silicate slurry and alumina slurry into a mold, wherein different slurries are distributed in a laminated manner, the zirconia slurry is arranged into a plurality of layers, the alumina slurry is arranged between every two adjacent zirconia slurries, the aluminum magnesium silicate slurry is arranged between the zirconia slurry and the alumina slurry, and the zirconia slurry and the alumina slurry are molded under the pressure of 150-250 MPa to obtain a blank;
s5, high-temperature sintering: and (3) degreasing and sintering the blank obtained by compression molding at high temperature to obtain the high-density zirconia ceramic.
Further, after the high temperature sintering in step S4, the zirconia slurry forms a zirconia bulk layer, the alumina slurry forms an alumina phase change layer, and the aluminum magnesium silicate slurry forms an aluminum magnesium silicate connection layer.
Further, in the zirconia slurry of step S1, the mass ratio of the nano zirconia powder, the dispersant, the binder and the lubricant is 40-70: 10-20: 5-8: 3-7. The processing difficulty is reduced by adopting the conventional dispersion process in the prior art.
Further, in the alumina slurry of step S3, the mass ratio of the alumina sol, the alumina, and the conversion mineralizer is 10-20: 30-50: 3-5, and the metallic aluminum and the alumina form a solid solution, so that rich grain boundaries are effectively formed, the sintering difficulty is reduced, and the densification process of the zirconia ceramic is effectively promoted.
Further, in step S5, the high-temperature sintering process includes: the sintering temperature is 1400-1600 ℃, the heat preservation time is 1-2h, the heating rate is 5-30 ℃/min, and the sintered product is naturally cooled.
Further, in the alumina slurry, alumina is α -Al2O3、γ-Al2O3、β-Al2O3、δ-Al2O3、η-Al2O3、θ-Al2O3、κ-Al2O3、ρ-Al2O3、χ-Al2O3Two or more of them; the conversion mineralizer is one or more than two of cerous chloride, aluminum fluoride and boric acid, can be flexibly selected according to the actual situation, exerts the advantages of a polycrystalline boundary and accelerates the densification process.
Furthermore, the interfaces of the zirconia body layer, the alumina phase change layer and the aluminum magnesium silicate connecting layer which are contacted with each other are non-flat smooth interfaces, so that the different layers can be conveniently contacted and infiltrated with each other, abundant crystal boundary layers are formed, and the sintering temperature is reduced.
Furthermore, a plurality of wavy interface connecting grooves are formed in the contact interface of the zirconia body layer, the alumina phase change layer and the aluminum magnesium silicate connecting layer, so that the interface contact area is increased, and the formation of a crystal boundary is facilitated.
Furthermore, the total number of internal layers of the zirconia ceramic is 4N +1, the 4M-3 layer is a zirconia body layer, the 4P-1 layer is an alumina phase change layer, the 2Q layer is an aluminum magnesium silicate connecting layer, N, M, P, Q are natural numbers, the contact combination of the zirconia body layer, the alumina phase change layer and the aluminum magnesium silicate connecting layer is effectively guaranteed, the formation of solid solution is guaranteed, and the sintering temperature is reduced.
Furthermore, the thickness ratio of the zirconia body layer, the alumina phase change layer and the magnesium aluminum silicate connecting layer is 10:2:1, and the zirconia is taken as a main body in structural design, so that the advantages of the zirconia in mechanical property are fully exerted.
Furthermore, a resistance heating mode is used in the high-temperature sintering process, so that rapid and uniform heating is effectively guaranteed, and the densification process is guaranteed.
Furthermore, the zirconia ceramic is used as a mobile phone back plate, and the thickness of the zirconia ceramic is 0.25-2 mm.
Furthermore, the zirconia ceramics is used as a mobile phone backboard, and a camera hole, a flash lamp hole, a horn hole and a charger jack are reserved.
The utility model relates to a high fine and close zirconia ceramic backplate structure has following beneficial effect:
first, high density, oxygen from the sintering processThe zirconium oxide can be divided into three stages in the sintering process, namely an initial stage, an intermediate stage and a final stage, wherein in the initial stage of sintering, the growth of zirconium oxide grains and the densification process are very slow; densification is accelerated from the intermediate stage, but grain growth is still slow at this stage; to the reduction of final stage densification rate, the grain grows up and increases fast, and is visible, and the initial stage is the key short slab of its zirconia ceramic backplate densification of restriction, the utility model discloses an introduce alumina phase transition layer between zirconia body layer, in the process that zirconia changes from low temperature type monoclinic crystal to medium temperature type tetragonal crystal, the abundant advantage that has the heterogeneous structure such as trigonal system, hexagonal system, cubic system, monoclinic system in the alumina of full play, the solid solution of zirconia and alumina grain boundary increases in sintering process, accelerates its densification process, effectively reduces the formation of gas pocket; furthermore, magnesium aluminum silicate as a tie layer has a three-layer plate-like crystal structure of A1 in the octahedron A1-0-OH during sintering3+The end face is weak electropositive due to the fracture of the silicon oxygen bond and the aluminum oxygen bond, under the standing state, the layer face and the end face are mutually attracted and close due to the electrical difference and continuously extend and copy between the wafers, and finally a three-dimensional interlaced net-shaped structure is formed, so that the powder in the three-dimensional interlaced net-shaped structure is lifted and suspended to present a stable suspended state, meanwhile, the interlaced net-shaped structures are effectively combined together to form a continuously tangled and close coating system, and the diversity of grain boundaries is promoted through the coating combination between materials, so that the materials effectively form a compact form;
secondly, the processing ability is strong, the stacked structure of the zirconia body layer, the alumina phase change layer and the aluminum magnesium silicate connecting layer is adopted to respectively prepare zirconia slurry, alumina slurry and aluminum magnesium silicate slurry, the processing difficulty caused by directly mixing different component slurries is effectively avoided, the influence on the performance of zirconia ceramics caused by uneven mixing of different components is avoided, in addition, the aluminum magnesium silicate is taken as the connecting layer and has a three-layer flaky crystal structure, the upper layer and the lower layer are both Si-O tetrahedrons, the middle layer is A1-O-OH octahedrons to form a unit crystal structure, the aluminum magnesium silicate is a stacked laminate formed by a plurality of unit structures before being mixed with water, after being mixed with water, water molecules not only wet the crystal surface, water is absorbed between the unit crystal layers, weak hydration can be released to overcome the van der Waals force between the unit crystal layers, the laminated structure is separated into more unit structures, so that compression molding is facilitated; (ii) a
Third, comprehensive properties is excellent, through the test, the utility model discloses the zirconia ceramic's of gained compactness is up to 96%, and bending strength is greater than 1300MPa, and the vickers hardness is greater than 1350, behind the polishing process the utility model discloses a zirconia ceramic backplate does not have the obvious pot hole of discovery. Has strong processability.
Drawings
FIGS. 1 to 3 are schematic diagrams of the layered structure of zirconia ceramics obtained from the back plate structure of highly dense zirconia ceramics of the present invention;
the reference numbers in the drawings include: 100. a zirconia bulk layer; 200. an aluminum magnesium silicate connecting layer; 300. an alumina phase change layer.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following provides a detailed description of the product of the present invention with reference to the embodiments and the accompanying drawings.
The utility model discloses a high fine and close zirconia ceramic backplate structure, including zirconia body layer, zirconia body layer is the stacked structure on a plurality of layers, is provided with the aluminium oxide phase transition layer between the adjacent zirconia body layer, is provided with the magnesium aluminum silicate articulamentum between zirconia body layer and the aluminium oxide phase transition layer.
The preparation method of the zirconia ceramic backboard of the utility model comprises the following steps:
s1, preparation of zirconia slurry: adding a dispersing agent, a binder and a lubricant into the nano zirconia powder, and uniformly stirring to obtain zirconia slurry;
s2, preparing aluminum magnesium silicate slurry: adding polyvinyl alcohol into the aluminum magnesium metasilicate particles, and uniformly stirring to obtain aluminum magnesium silicate slurry;
s3, preparation of alumina slurry: dissolving the aluminum sol, the alumina and the conversion mineralizer in water under the condition of stirring and fully mixing to obtain slurry;
s4, laminating and molding: respectively injecting zirconia slurry, aluminum magnesium silicate slurry and alumina slurry into a mold, wherein different slurries are distributed in a laminated manner, the zirconia slurry is arranged into a plurality of layers, the alumina slurry is arranged between every two adjacent zirconia slurries, the aluminum magnesium silicate slurry is arranged between the zirconia slurry and the alumina slurry, and the zirconia slurry and the alumina slurry are molded under the pressure of 150-250 MPa to obtain a blank;
s5, high-temperature sintering: and (3) degreasing and sintering the blank obtained by compression molding at high temperature to obtain the high-density zirconia ceramic.
Further, after the high temperature sintering in step S4, the zirconia slurry forms a zirconia bulk layer, the alumina slurry forms an alumina phase change layer, and the aluminum magnesium silicate slurry forms an aluminum magnesium silicate connection layer.
Further, in the zirconia slurry of step S1, the mass ratio of the nano zirconia powder, the dispersant, the binder and the lubricant is 40-70: 10-20: 5-8: 3-7.
Further, in the alumina slurry of the step S3, the mass ratio of the alumina sol, the alumina, and the conversion mineralizer is 10-20: 30-50: 3-5.
Further, in step S5, the high-temperature sintering process includes: the sintering temperature is 1400-1600 ℃, the heat preservation time is 1-2h, the heating rate is 5-30 ℃/min, and the sintered product is naturally cooled.
Further, in the alumina slurry, alumina is α -Al2O3、γ-Al2O3、β-Al2O3、δ-Al2O3、η-Al2O3、θ-Al2O3、κ-Al2O3、ρ-Al2O3、χ-Al2O3Two or more of them; the conversion mineralizer is one or more than two of cerous chloride, aluminum fluoride and boric acid.
Furthermore, the contact interface of the zirconia body layer, the alumina phase change layer and the aluminum magnesium silicate connecting layer is an uneven smooth interface.
Furthermore, a plurality of wavy interface connecting grooves are formed in the contact interface of the zirconia body layer, the alumina phase change layer and the aluminum magnesium silicate connecting layer.
Furthermore, the total number of the layers in the zirconia ceramic is 4N +1, the 4M-3 layer is a zirconia body layer, the 4P-1 layer is an alumina phase change layer, the 2Q layer is an aluminum magnesium silicate connecting layer, and N, M, P, Q are natural numbers.
Furthermore, the thickness ratio of the zirconia body layer, the alumina phase change layer and the magnesium aluminum silicate connecting layer is 10:2: 1.
Furthermore, a resistance heating mode is used in the high-temperature sintering process, so that rapid and uniform heating is effectively guaranteed, and the densification process is guaranteed.
Furthermore, the zirconia ceramic is used as a mobile phone back plate, and the thickness of the zirconia ceramic is 0.25-2 mm.
Furthermore, the zirconia ceramics is used as a mobile phone backboard, and a camera hole, a flash lamp hole, a horn hole and a charger jack are reserved.
Example 1
The utility model discloses a high fine and close zirconia ceramic backplate structure, including zirconia body layer, zirconia body layer is the stacked structure on a plurality of layers, is provided with the aluminium oxide phase transition layer between the adjacent zirconia body layer, is provided with the magnesium aluminum silicate articulamentum between zirconia body layer and the aluminium oxide phase transition layer.
The preparation method of the zirconia ceramic backboard of the utility model comprises the following steps:
s1, preparation of zirconia slurry: adding a dispersing agent, a binder and a lubricant into the nano zirconia powder, and uniformly stirring to obtain zirconia slurry;
s2, preparing aluminum magnesium silicate slurry: adding polyvinyl alcohol into the aluminum magnesium metasilicate particles, and uniformly stirring to obtain aluminum magnesium silicate slurry;
s3, preparation of alumina slurry: dissolving the aluminum sol, the alumina and the conversion mineralizer in water under the condition of stirring and fully mixing to obtain slurry:
s4, laminating and molding: respectively injecting zirconia slurry, aluminum magnesium silicate slurry and alumina slurry into a mold, wherein different slurries are distributed in a laminated manner, the zirconia slurry is arranged into a plurality of layers, the alumina slurry is arranged between every two adjacent zirconia slurries, the aluminum magnesium silicate slurry is arranged between the zirconia slurry and the alumina slurry, and the zirconia slurry and the alumina slurry are molded under a pressure of 250MPa to obtain a blank;
s5, high-temperature sintering: and (3) degreasing and sintering the blank obtained by compression molding at high temperature to obtain the high-density zirconia ceramic.
In this embodiment, after high temperature sintering at step S4, the zirconia slurry forms a zirconia bulk layer, the alumina slurry forms an alumina phase change layer, and the aluminum magnesium silicate slurry forms an aluminum magnesium silicate bonding layer.
In this embodiment, in the zirconia slurry of step S1, the mass ratio of the nano zirconia powder, the dispersant, the binder and the lubricant is 70:15:5: 7; in the alumina slurry of the step S3, the mass ratio of the alumina sol, the alumina and the conversion mineralizer is 15:30: 5; in step S5, the high-temperature sintering process includes: the sintering temperature is 1600 ℃, the heat preservation time is 1.5h, the heating rate is 5 ℃/min, and the sintering is naturally cooled.
In this example, in the alumina slurry, alumina is α -Al2O3、γ-Al2O3、β-Al2O3、δ-Al2O3、η-Al2O3、θ-Al2O3、κ-Al2O3、ρ-Al2O3、χ-Al2O3(ii) a The conversion mineralizer is cerous chloride, aluminum fluoride and boric acid.
In this embodiment, the interface where the zirconia bulk layer, the alumina phase change layer, and the magnesium aluminum silicate connecting layer contact each other is an uneven smooth interface.
Example 2
The utility model discloses a high fine and close zirconia ceramic backplate structure, including zirconia body layer, zirconia body layer is the stacked structure on a plurality of layers, is provided with the aluminium oxide phase transition layer between the adjacent zirconia body layer, is provided with the magnesium aluminum silicate articulamentum between zirconia body layer and the aluminium oxide phase transition layer.
The preparation method of the zirconia ceramic backboard of the utility model comprises the following steps:
s1, preparation of zirconia slurry: adding a dispersing agent, a binder and a lubricant into the nano zirconia powder, and uniformly stirring to obtain zirconia slurry;
s2, preparing aluminum magnesium silicate slurry: adding polyvinyl alcohol into the aluminum magnesium metasilicate particles, and uniformly stirring to obtain aluminum magnesium silicate slurry;
s3, preparation of alumina slurry: dissolving the aluminum sol, the alumina and the conversion mineralizer in water under the condition of stirring and fully mixing to obtain slurry:
s4, laminating and molding: respectively injecting zirconia slurry, aluminum magnesium silicate slurry and alumina slurry into a mold, wherein different slurries are distributed in a laminated manner, the zirconia slurry is arranged into a plurality of layers, the alumina slurry is arranged between every two adjacent zirconia slurries, the aluminum magnesium silicate slurry is arranged between the zirconia slurry and the alumina slurry, and the zirconia slurry and the alumina slurry are molded under the pressure of 200MPa to obtain a blank;
s5, high-temperature sintering: and (3) degreasing and sintering the blank obtained by compression molding at high temperature to obtain the high-density zirconia ceramic.
In this embodiment, after high temperature sintering at step S4, the zirconia slurry forms a zirconia bulk layer, the alumina slurry forms an alumina phase change layer, and the aluminum magnesium silicate slurry forms an aluminum magnesium silicate bonding layer.
In this embodiment, in the zirconia slurry of step S1, the mass ratio of the nano zirconia powder, the dispersant, the binder, and the lubricant is 55:10:8: 5; in the alumina slurry of the step S3, the mass ratio of the alumina sol, the alumina and the conversion mineralizer is 10:50: 4; in step S5, the high-temperature sintering process includes: the sintering temperature is 1400 ℃, the heat preservation time is 2h, the heating rate is 20 ℃/min, and the sintering is finished and then the natural cooling is carried out.
In this example, in the alumina slurry, alumina is α -Al2O3、γ-Al2O3、β-Al2O3、δ-Al2O3(ii) a The conversion mineralizer is cerous chloride and aluminum fluoride.
In this embodiment, a plurality of wavy interface connection grooves are formed in the contact interface of the zirconia body layer, the alumina phase change layer and the magnesium aluminum silicate connection layer.
Example 3
The utility model discloses a high fine and close zirconia ceramic backplate structure, including zirconia body layer, zirconia body layer is the stacked structure on a plurality of layers, is provided with the aluminium oxide phase transition layer between the adjacent zirconia body layer, is provided with the magnesium aluminum silicate articulamentum between zirconia body layer and the aluminium oxide phase transition layer.
The preparation method of the zirconia ceramic backboard of the utility model comprises the following steps:
s1, preparation of zirconia slurry: adding a dispersing agent, a binder and a lubricant into the nano zirconia powder, and uniformly stirring to obtain zirconia slurry;
s2, preparing aluminum magnesium silicate slurry: adding polyvinyl alcohol into the aluminum magnesium metasilicate particles, and uniformly stirring to obtain aluminum magnesium silicate slurry;
s3, preparation of alumina slurry: dissolving the aluminum sol, the alumina and the conversion mineralizer in water under the condition of stirring and fully mixing to obtain slurry:
s4, laminating and molding: respectively injecting zirconia slurry, aluminum magnesium silicate slurry and alumina slurry into a mold, wherein different slurries are distributed in a laminated manner, the zirconia slurry is arranged into a plurality of layers, the alumina slurry is arranged between every two adjacent zirconia slurries, the aluminum magnesium silicate slurry is arranged between the zirconia slurry and the alumina slurry, and the zirconia slurry and the alumina slurry are molded under the pressure of 150MPa to obtain a blank;
s5, high-temperature sintering: and (3) degreasing and sintering the blank obtained by compression molding at high temperature to obtain the high-density zirconia ceramic.
In this embodiment, after high temperature sintering at step S4, the zirconia slurry forms a zirconia bulk layer, the alumina slurry forms an alumina phase change layer, and the aluminum magnesium silicate slurry forms an aluminum magnesium silicate bonding layer.
In this embodiment, in the zirconia slurry of step S1, the mass ratio of the nano zirconia powder, the dispersant, the binder and the lubricant is 40:20:6: 3; in the alumina slurry of the step S3, the mass ratio of the alumina sol, the alumina and the conversion mineralizer is 20:40: 3; in step S5, the high-temperature sintering process includes: the sintering temperature is 1600 ℃, the heat preservation time is 1.5h, the heating rate is 5 ℃/min, and the sintering is naturally cooled.
In this example, in the alumina slurry, alumina is α -Al2O3、θ-Al2O3、κ-Al2O3、ρ-Al2O3(ii) a The conversion mineralizer is aluminum fluoride.
In this embodiment, a plurality of wavy interface connection grooves are formed in the contact interface of the zirconia body layer, the alumina phase change layer and the magnesium aluminum silicate connection layer.
Example 4
The utility model discloses a high fine and close zirconia ceramic backplate structure, including zirconia body layer, zirconia body layer is the stacked structure on a plurality of layers, is provided with the aluminium oxide phase transition layer between the adjacent zirconia body layer, is provided with the magnesium aluminum silicate articulamentum between zirconia body layer and the aluminium oxide phase transition layer.
The preparation method of the zirconia ceramic backboard of the utility model comprises the following steps:
s1, preparation of zirconia slurry: adding a dispersing agent, a binder and a lubricant into the nano zirconia powder, and uniformly stirring to obtain zirconia slurry;
s2, preparing aluminum magnesium silicate slurry: adding polyvinyl alcohol into the aluminum magnesium metasilicate particles, and uniformly stirring to obtain aluminum magnesium silicate slurry;
s3, preparation of alumina slurry: dissolving the aluminum sol, the alumina and the conversion mineralizer in water under the condition of stirring and fully mixing to obtain slurry:
s4, laminating and molding: respectively injecting zirconia slurry, aluminum magnesium silicate slurry and alumina slurry into a mold, wherein different slurries are distributed in a laminated manner, the zirconia slurry is arranged into a plurality of layers, the alumina slurry is arranged between every two adjacent zirconia slurries, the aluminum magnesium silicate slurry is arranged between the zirconia slurry and the alumina slurry, and the zirconia slurry and the alumina slurry are molded under the pressure of 230MPa to obtain a blank;
s5, high-temperature sintering: and (3) degreasing and sintering the blank obtained by compression molding at high temperature to obtain the high-density zirconia ceramic.
In this embodiment, after high temperature sintering at step S4, the zirconia slurry forms a zirconia bulk layer, the alumina slurry forms an alumina phase change layer, and the aluminum magnesium silicate slurry forms an aluminum magnesium silicate bonding layer.
In this embodiment, in the zirconia slurry of step S1, the mass ratio of the nano zirconia powder, the dispersant, the binder and the lubricant is 50:12:6: 4; in the alumina slurry of the step S3, the mass ratio of the alumina sol, the alumina and the conversion mineralizer is 17:36: 4; in step S5, the high-temperature sintering process includes: the sintering temperature is 1450 ℃, the heat preservation time is 1.3h, the heating rate is 25 ℃/min, and the sintering is naturally cooled.
In this example, in the alumina slurry, alumina is α -Al2O3、γ-Al2O3、β-Al2O3、ρ-Al2O3、χ-Al2O3(ii) a The conversion mineralizer is cerous chloride and aluminum fluoride.
In this embodiment, the interface where the zirconia bulk layer, the alumina phase change layer, and the magnesium aluminum silicate connecting layer contact each other is an uneven smooth interface.
Example 5
The utility model discloses a high fine and close zirconia ceramic backplate structure, including zirconia body layer, zirconia body layer is the stacked structure on a plurality of layers, is provided with the aluminium oxide phase transition layer between the adjacent zirconia body layer, is provided with the magnesium aluminum silicate articulamentum between zirconia body layer and the aluminium oxide phase transition layer.
The preparation method of the zirconia ceramic backboard of the utility model comprises the following steps:
s1, preparation of zirconia slurry: adding a dispersing agent, a binder and a lubricant into the nano zirconia powder, and uniformly stirring to obtain zirconia slurry;
s2, preparing aluminum magnesium silicate slurry: adding polyvinyl alcohol into the aluminum magnesium metasilicate particles, and uniformly stirring to obtain aluminum magnesium silicate slurry;
s3, preparation of alumina slurry: dissolving the aluminum sol, the alumina and the conversion mineralizer in water under the condition of stirring and fully mixing to obtain slurry:
s4, laminating and molding: respectively injecting zirconia slurry, aluminum magnesium silicate slurry and alumina slurry into a mold, wherein different slurries are distributed in a laminated manner, the zirconia slurry is arranged into a plurality of layers, the alumina slurry is arranged between every two adjacent zirconia slurries, the aluminum magnesium silicate slurry is arranged between the zirconia slurry and the alumina slurry, and the zirconia slurry and the alumina slurry are molded under the pressure of 190MPa to obtain a blank;
s5, high-temperature sintering: and (3) degreasing and sintering the blank obtained by compression molding at high temperature to obtain the high-density zirconia ceramic.
In this embodiment, after high temperature sintering at step S4, the zirconia slurry forms a zirconia bulk layer, the alumina slurry forms an alumina phase change layer, and the aluminum magnesium silicate slurry forms an aluminum magnesium silicate bonding layer.
In this embodiment, in the zirconia slurry of step S1, the mass ratio of the nano zirconia powder, the dispersant, the binder, and the lubricant is 65:13:6: 5; in the alumina slurry of the step S3, the mass ratio of the alumina sol, the alumina and the conversion mineralizer is 17:38: 4; in step S5, the high-temperature sintering process includes: the sintering temperature is 1550 ℃, the heat preservation time is 1.6h, the heating rate is 10 ℃/min, and the sintering is naturally cooled.
In this example, in the alumina slurry, alumina is α -Al2O3、γ-Al2O3、β-Al2O3、δ-Al2O3、η-Al2O3、θ-Al2O3、κ-Al2O3、ρ-Al2O3、χ-Al2O3(ii) a The conversion mineralizer is aluminum fluoride.
In this embodiment, a plurality of wavy interface connection grooves are formed in the contact interface of the zirconia body layer, the alumina phase change layer and the magnesium aluminum silicate connection layer.
Example 6
As shown in fig. 1, the utility model discloses a high fine and close zirconia ceramic backplate structure, the inside total number of piles of zirconia ceramic backplate is 5 layers, and 1 st layer, 5 th layer are zirconia body layer 100, and the 3 rd layer is alumina phase transition layer 300, and 2 nd layer, 4 th layer are magnesium aluminum silicate articulamentum 200.
In this example, the specific preparation method and sintering process are as shown in example 5, and the thickness ratio of the zirconia bulk layer, the alumina phase change layer, and the magnesium aluminum silicate connecting layer is 10:2: 1.
Through the test, the zirconia ceramic of discovery this embodiment carries out capability test, and the test is discover the utility model discloses a ceramic backplate fall highly be 83cm, and surperficial vickers hardness is 1280 HV.
Example 7
As shown in fig. 2, the utility model discloses a high fine and close zirconia ceramic backplate structure, the inside total number of piles of zirconia ceramic backplate is 9 layers, and 1 st layer, 5 th layer, 9 th layer are zirconia body layer 100, and 3 rd layer, 7 th layer are alumina phase transition layer 300, and 2 nd layer, 4 th layer, 6 th layer, 8 th layer are aluminium magnesium silicate articulamentum 200.
In this example, the specific preparation method and sintering process are as shown in example 5, and the thickness ratio of the zirconia bulk layer, the alumina phase change layer, and the magnesium aluminum silicate connecting layer is 10:2: 1.
Through the test, discover that the zirconia ceramic of this embodiment carries out capability test, the test discovers the utility model discloses a ceramic backplate fall highly be 84cm, and surperficial vickers hardness is 1370 HV.
Example 8
As shown in fig. 3, the utility model discloses a high fine and close zirconia ceramic backplate structure, the inside total number of piles of zirconia ceramic backplate is 13 layers, and 1 st layer, 5 th layer, 9 th layer, 13 th layer are zirconia body layer 100, and 3 rd layer, 7 th layer, 11 th layer are alumina phase transition layer 300, and 2 nd layer, 4 th layer, 6 th layer, 8 th layer, 10 th layer, 12 th layer are magnesium aluminum silicate tie layer 200.
In this example, the specific preparation method and sintering process are as shown in example 5, and the thickness ratio of the zirconia bulk layer, the alumina phase change layer, and the magnesium aluminum silicate connecting layer is 10:2: 1.
Through the test, discover that the zirconia ceramic of this embodiment carries out capability test, the test discovers the utility model discloses a ceramic backplate fall highly be 84cm, and surperficial vickers hardness is 1370 HV.
The above embodiments are only specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, many variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.
Claims (8)
1. The utility model provides a high fine and close zirconia ceramic backplate structure, includes zirconia bulk layer, its characterized in that zirconia bulk layer is the laminated structure of a plurality of layers, is provided with alumina phase transition layer between the adjacent zirconia bulk layer, is provided with the magnesium aluminum silicate articulamentum between zirconia bulk layer and the alumina phase transition layer.
2. The highly densified zirconia ceramic backplate structure of claim 1, wherein: the total number of internal layers of the zirconia ceramic is 4N +1 layers, the 4M-3 th layer is a zirconia body layer, the 4P-1 th layer is an alumina phase change layer, the 2Q th layer is an aluminum magnesium silicate connecting layer, and N, M, P, Q is a natural number.
3. The highly densified zirconia ceramic backplate structure of claim 2, wherein: the interface where the zirconia body layer, the alumina phase change layer and the aluminum magnesium silicate connecting layer are contacted with each other is a non-flat smooth interface.
4. The highly densified zirconia ceramic backplate structure of claim 3, wherein: the interface of the zirconia body layer, the alumina phase change layer and the aluminum magnesium silicate connecting layer which are contacted with each other is provided with a plurality of wave-shaped interface connecting grooves.
5. The highly densified zirconia ceramic backplate structure of claim 4, wherein: the thickness ratio of the zirconia body layer, the alumina phase change layer and the aluminum magnesium silicate connecting layer is 10:2: 1.
6. The highly densified zirconia ceramic backplate structure of claim 5, wherein: the thickness of the zirconia ceramic back plate is 0.25-2 mm.
7. The highly densified zirconia ceramic backplate structure of claim 6, wherein: the zirconia ceramic backboard is provided with a camera hole, a flash lamp hole, a horn hole and a charger jack.
8. The highly densified zirconia ceramic backplate structure of claim 7, wherein: the zirconia ceramic back plate is prepared by high-temperature sintering.
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