CN108726994B - Composite ceramic cover plate and manufacturing method thereof - Google Patents

Composite ceramic cover plate and manufacturing method thereof Download PDF

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CN108726994B
CN108726994B CN201710356406.7A CN201710356406A CN108726994B CN 108726994 B CN108726994 B CN 108726994B CN 201710356406 A CN201710356406 A CN 201710356406A CN 108726994 B CN108726994 B CN 108726994B
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ceramic
cover plate
layer
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CN108726994A (en
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洪健
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Ningbo Ninghe Sensor Co ltd
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NINGBO JIANLI ELECTRONICS CO Ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—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
    • C04B35/10—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 aluminium oxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—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
    • C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/0072—Heat treatment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/48—Macromolecular compounds
    • C04B41/488—Other macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/82—Coating or impregnation with organic materials
    • C04B41/83—Macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/554—Wear resistance

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  • Composite Materials (AREA)
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  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

According to the composite ceramic cover plate and the manufacturing method thereof, the thickness and the components of the ceramic layer and the thermoplastic layer can be adjusted according to different requirements of the thickness of the cover plate of an electronic product through the bending characteristics of the ceramic layer with different thicknesses so as to meet the cover plate requirements of the product, so that the cover plate with the ceramic outer surface is prepared through compounding the ceramic material and the thermoplastic material, the outer surface of the cover plate has the texture of ceramic, the hardness, the strength, the toughness and the wear resistance of the cover plate are improved, and the requirements of light weight, thinness, high quality and low cost of the cover plate of the electronic product are effectively met.

Description

Composite ceramic cover plate and manufacturing method thereof
Technical Field
The invention relates to the field of cover plates, in particular to a composite ceramic cover plate suitable for shells of electronic products such as mobile phones, tablet computers and the like and a manufacturing method thereof.
Background
Along with the problem of the homogeneity of smart machine is more and more serious, many users of today turn to the fuselage outward appearance with attention, lid adopts metal product and plastic products mostly behind the current fuselage, metal product's colour is comparatively single, it is common have the gold, silver and black, plastic products is because its plasticity and low price wide application are in the cell-phone market, especially low end machine, although reduce the manufacturing cost of cell-phone, the back lid of plastic materials often influences user experience, can't reach higher quality requirement, its hardness and wearability are relatively poor, there are scratch and wearing and tearing sign easily, also lead to the depreciation phenomenon of fuselage outward appearance comparatively serious.
The lid material still can select pottery and glass behind the fuselage, if compare these four kinds of materials: in terms of wear resistance, ceramic > glass > metal > plastic; in the aspect of brittleness, the plasticity of the ceramic is obviously enhanced after the material is modified, a drop test is met, the plastic and the metal have stronger plasticity, and the glass is worst; in the aspect of rigidity, the ceramic and the glass are best, the plastic deformation is small, the plastic is worst, and the plastic deformation is obvious; in the aspect of electromagnetic shielding, the ceramic, the plastic and the glass have no influence and can be integrally formed, the metal has great influence, the plastic is embedded at the upper antenna and the lower antenna, and signals are released, so that the development of a wireless charging technology is influenced, the metal has a shielding effect and is not suitable for subsequent wireless charging, the plastic is too low, the glass is fragile, and the ceramic rear cover which cannot shield electromagnetic signals is undoubtedly the best choice for the future wireless charging; in the aspect of coloring performance, ceramics and plastics can be used for making various surface patterns, particularly ceramics, the colored ceramics are more classical and attractive, the quality is higher, glass is more difficult, the film is generally required to be pasted to increase the texture, and the metal product is easy to have the condition that paint falls off; in the sense grade and the cost, although the cost of the ceramic is the highest, the sense grade is also the highest, and in contrast, the cost of the plastic is the lowest, the sense grade is also the lowest, and the thickness of the plastic serving as a rear cover is thicker, so that once the plastic is thinned, the strength of the plastic is insufficient, and the plastic is less wear-resistant.
Through the comprehensive comparison of four materials, it is easy to see that, in the aspects of sensory grade, wear resistance, electromagnetic shielding and the like, ceramics have undoubtedly greater advantages to be selected as the rear cover of the body, but because the cost of ceramics is too high, related manufacturers can only refuse, and the ceramic rear cover is also one of the main reasons why the ceramic rear cover cannot be popularized. Because the hardness of the ceramic is higher, the ceramic molding processing is difficult, the ceramic can only be polished by diamond in a little way, the molding efficiency is low, when the ceramic is processed into a film curved surface, a CNC lathe is required to integrally cut and polish the film curved surface into a required curved surface shape, one CNC can only make two pieces every day, the mode has extremely low efficiency, the material waste is serious, the product percent of pass is low, and the manufacturing cost of the ceramic rear cover can not be reduced directly.
On the other hand, the existing patent also provides a preparation method of various mobile phone ceramic cover plates, in the improvement aspect of the forming process, the patent 201010173564.7 discloses a preparation method of colored zirconia ceramics, the patent 201410036959.0 discloses a method for preparing various colored mobile phone parts by zirconia ceramics, and the ceramic mobile phone shell is prepared by adopting an injection molding mode, but the dry pressing and the injection molding are only suitable for forming thick parts with the thickness of more than 1mm, the common plastic mobile phone shell is only 0.4mm, the two methods are not suitable for the actual production process of the ceramic cover plates, and for the mobile phone rear cover of a large-sized thin-walled part, the two molding modes are difficult to avoid the uneven material density caused by the uneven forming pressure, and the part is easy to deform and crack in the sintering process. In the improvement aspect of ceramic materials, in patent 201510309285.1, "a preparation method of a zirconia ceramic mobile phone rear cover", alumina, silica and titanium dioxide with certain mass fractions are doped into zirconia powder to modify ceramics, and then CNC processing is performed, so that the difficulty of the processing process is still high, unforeseeable sudden fracture is easy to occur, and the production cost is increased seriously; in the ceramic matrix composite material for the mobile phone shell, the ceramic matrix composite material mobile phone shell, which is prepared by adding the thermoplastic resin, the dispersing agent and the plasticizer into the zirconia nano powder in the patent 201610098697. X', the problem of the thickness of the ceramic matrix injection molding is not solved. Therefore, the development trend of the cover plate of the electronic product toward being light, thin, high in quality and low in cost provides more challenges for the forming process of the ceramic cover plate.
Disclosure of Invention
The invention mainly aims to provide a composite ceramic cover plate and a manufacturing method thereof, aiming at the defects in the prior art, the cover plate with the ceramic outer surface is prepared by compounding a ceramic material and a thermoplastic material, so that the outer surface of the cover plate has the texture of ceramic, and the hardness, strength, toughness and wear resistance of the cover plate are improved, thereby effectively meeting the requirements of light, thin, high-quality and low-cost electronic product cover plates.
Another object of the present invention is to provide a composite ceramic cover plate and a method for manufacturing the same, which abandons the conventional molding process of ceramic cover plates, and drives the ceramic to be bent and molded by using a composite thermoplastic material, so as to realize the curved surface effect of the external ceramic, without requiring an inefficient grinding manner of a CNC lathe, thereby not only saving the use of ceramic raw materials and improving the product yield, but also being beneficial to reducing the molding thickness of the cover plate while maintaining the hardness of the cover plate.
Another object of the present invention is to provide a composite ceramic cover plate and a method for manufacturing the same, which do not require complicated equipment and manufacturing steps, optimize the production process of the ceramic cover plate, greatly reduce the production cost of the ceramic cover plate, and are suitable for large-scale popularization and production.
Another object of the present invention is to provide a composite ceramic cover plate and a method for manufacturing the same, in which an inner thermoplastic material is combined with an outer ceramic material, so that the outer surface of the cover plate has a texture and an aesthetic appearance of ceramic, and the strength and wear resistance of the cover plate are higher than those of a plastic cover plate by several orders of magnitude.
Another object of the present invention is to provide a composite ceramic cover plate and a method for manufacturing the same, which are suitable for being used as a housing or a rear cover of an electronic product such as a mobile phone, a tablet computer, a camera, an electronic watch, a display, etc., and are not only favorable for upgrading the outer surface of the electronic product, but also favorable for wireless charging application, and do not shield electromagnetic signals, so as to replace a conventional high-grade metal cover plate, and also favorable for avoiding easy abrasion of plastics.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: the composite ceramic cover plate comprises a ceramic layer and a thermoplastic layer, wherein the ceramic layer is arranged on the outer side of the composite ceramic cover plate, the thermoplastic layer is compounded on the inner surface of the ceramic layer, the thickness of the ceramic layer is 0.5-400 mu m, and the thickness of the thermoplastic layer is 10-500 mu m.
Preferably, the material of the ceramic layer is selected from one or more of oxide ceramic, carbide ceramic, nitride ceramic and boride ceramic, and the oxide ceramic is selected from one or more of zirconia, alumina, silica, magnesia, chromia, beryllia, vanadic oxide, diboron trioxide, spinel, zinc oxide, yttria, calcia, ceria, mullite, barium titanate, lead zirconate titanate, zircon powder, lanthanum chromate.
Preferably, the carbide ceramic is selected from SiC, TiC, WC, ZrC, B4C、HfC、TaC、Be2C、UC、VC、NbC、Mo2C. One or more of MoC, the nitride ceramics are selected from Si3N4、TiN、BN、AlN、C3N4ZrN, VN, TaN, NbN and ScN, and the boride ceramic is selected from TiB2、ZrB2、Mo2B、WB4、LaB2One or more of HfB, WB and ZrB.
Preferably, the thickness of the ceramic layer is 5-200 μm.
Preferably, the carbide ceramic comprises zirconia, yttria and alumina.
Preferably, the thermoplastic layer is a thermoplastic resin material selected from one or more of polycarbonate, polymethylmethacrylate, acrylonitrile-butadiene-styrene copolymer, high density polyethylene, polyamide, nylon 6, nylon 66, nylon 46, polyethylene, polypropylene, polyvinyl chloride, polytetrafluoroethylene, polystyrene, polyetherimide, polyethersulfone, polysulfone, polyphthalamide, polyphenylene sulfide, polybutylene terephthalate, polyethylene terephthalate, hydrogenated styrene-butadiene block copolymer, polyetheretherketone, polytrimethylene terephthalate and silicone-based resins.
A method of manufacturing a composite ceramic deck, comprising the steps of:
s100, providing a ceramic sheet;
s200, coating a thermoplastic resin material on the inner surface of the ceramic sheet to form a thermoplastic layer and a ceramic layer;
s300, bending the ceramic sheet and/or the ceramic layer to obtain the composite ceramic cover plate with a curved surface.
According to an embodiment of the present invention, the step S300 includes a step S310 of die-casting the ceramic sheet to form a curved ceramic surface and/or a step S320 of hot-pressing the thermoplastic layer to bend the ceramic layer to form a curved ceramic surface, so as to obtain the composite ceramic cover plate.
According to an embodiment of the present invention, the method for manufacturing the ceramic cover plate further includes a step S400 of grinding an outer surface of a ceramic sheet so that a thickness of the ceramic sheet is reduced to a bendable preset thickness, wherein the step S400 is after the step S200 or after the step S100 or after the step S300.
According to an embodiment of the present invention, the ceramic sheet is processed to 60-400 μm in step S100, and the ceramic sheet is prepared by a film extruding machine or a casting machine.
According to an embodiment of the present invention, in the step S400, the outer surface of the ceramic sheet is ground through a flat grinding process, the ceramic cover plate coated with the thermoplastic layer is placed on a flat grinding disc or a grinding disc, and the ceramic layer is ground and thinned to a preset thickness.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
The composite ceramic cover plate comprises a ceramic layer and a thermoplastic layer, wherein the ceramic layer is arranged on the outer side of the composite ceramic cover plate, the thermoplastic layer is compounded on the inner surface of the ceramic layer, the thickness of the ceramic layer is 0.5-400 mu m, and the thickness of the thermoplastic layer is 10-500 mu m. According to different requirements of the thickness of the cover plate of the electronic product, the thicknesses of the ceramic layer and the thermoplastic layer can be adjusted to meet the requirements of the cover plate of the product. Therefore, the cover plate with the ceramic outer surface is prepared by compounding the ceramic material and the thermoplastic material, so that the outer surface of the cover plate has the texture of ceramic, the hardness, the strength, the toughness and the wear resistance of the cover plate are improved, and the requirements of light, thin, high-quality and low-cost electronic product cover plates are effectively met.
The material of the ceramic layer is selected from one or more of oxide ceramic, carbide ceramic, nitride ceramic and boride ceramic, and the oxide ceramic is selected from ZrO2(zirconium oxide) and Al2O3(aluminum oxide), SiO2(silicon dioxide), MgO (magnesium oxide), Cr2O3(chromium oxide), BeO (beryllium oxide), V2O5(vanadium pentoxide), B2O3(diboron trioxide), MgO. Al2O3(spinel), ZnO (Zinc oxide), Y2O3(yttrium oxide), CaO (calcium oxide), CeO2(cerium oxide), 3Al2O3·2SiO2(mullite) BaTiO3(barium titanate), PbZrTiO3(lead zirconate titanate), ZrSiO4(zircon powder) and LaCrO3(lanthanum chromite) selected from SiC (silicon carbide), TiC (titanium carbide), WC (tungsten carbide), ZrC (zirconium carbide), B4C (boron carbide), HfC (hafnium carbide), TaC, Be2C (beryllium carbide), UC, VC, NbC, Mo2C. One or more of MoC, the nitride ceramics are selected from Si3N4(silicon nitride), TiN (titanium nitride), BN (boron nitride), AlN (aluminum nitride), C3N4One or more of (carbon nitride), ZrN, VN, TaN, NbN and ScN, and the boride ceramic is selected from TiB2、ZrB2、Mo2B、WB4、LaB2HfB, WB, ZrB, the material of the ceramic layer is not limited to the above, and other improved ceramic materials or materials having ceramic properties may also be made into the ceramic layer. The properties of the ceramic, such as plastic deformation, are improved by the selection and combination of the individual materials in the ceramic layer, and MgO ceramics, which are based on ionic bonds, can undergo high bending at room temperature without breaking, such as strength, and can be adjusted by means of aluminum oxide.
Preferably, the ceramic layer comprises zirconia, yttria and alumina, and the composition and composition of the ceramic layer is adjusted according to different strength requirements of the cover plate. Wherein the yttria helps to fill voids within the zirconia, enhancing the strength and hardness of the ceramic layer. Meanwhile, in order to prepare a cover plate meeting the requirements, the ceramic components of the ceramic layer can be selected and added from the four types of ceramics, and other modifying substances can be added to modify the ceramic layer.
The bending property of the ceramic layer increases with the thinning of the thickness of the ceramic layer, that is, the thickness of the ceramic layer is sequentially thinned from 400 μm to 0.5 μm, for example, the ceramic layers of 400 μm, 200 μm, 150 μm, 100 μm, 50 μm, 20 μm, 10 μm, 5 μm, 2 μm and 0.5 μm are selected for comparison of the bending property, the bending degree is gradually enhanced, the bending property of the ceramic layer of 200 μm is weaker, the bending property of the ceramic layer of 0.5 μm is stronger, preferably, the thickness of the ceramic layer is 5-20 μm, and preferably, the thickness of the ceramic layer is 10 μm.
The thermoplastic layer is a thermoplastic resin material selected from one or more of Polycarbonate (PC), Polymethylmethacrylate (PMMA), acrylonitrile-butadiene-styrene copolymer (ABS), high density polyethylene (HPDE), Polyamide (PA), nylon 6, nylon 66, nylon 46, Polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), Polytetrafluoroethylene (PTEE), Polystyrene (PS), Polyetherimide (PEI), Polyethersulfone (PES), Polysulfone (PSF), polyphthalamide (PPA), polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), hydrogenated styrene-butadiene block copolymer (SEBS), Polyetheretherketone (PEEK), polytrimethylene terephthalate (PTT) and silicone-based resins, the material of the thermoplastic layer is not limited to the above, and other modified thermoplastic materials or materials meeting the requirements of the thermoplastic layer may be used.
Wherein the thermoplastic layer is an improved thermoplastic material, and an improved material is added into the thermoplastic resin material, and the improved material is selected from one or more of thermoplastic elastomer, glass fiber, aramid fiber, polyamide fiber, carbon fiber, graphite fiber, mineral fiber, ceramic fiber, carbon nano tube, nano filler, mineral filler, ceramic filler and liquid crystal polymer.
The thermoplastic layer can also be added with a heat-conducting filler, the heat-conducting filler is selected from one or more of aluminum nitride, boron nitride, aluminum oxide and carbon nano tubes, the ceramic layer can also be added with the heat-conducting filler for modification, the heat-conducting filler is not limited to the above materials, and other materials for improving the heat conductivity of the thermoplastic layer and the ceramic layer can also be used.
Preferably, the material of the thermoplastic layer is selected from one or more of PC, ABS, PA, PP, PE.
The thickness of the thermoplastic layer is 100-400 microns, preferably 200-300 microns, and the thickness of the thermoplastic layer can be increased or decreased according to the requirement of the thickness of a cover plate of a mobile phone or other electronic products.
A method of manufacturing a composite ceramic deck, comprising the steps of:
s100, providing a ceramic sheet;
s200, coating a thermoplastic resin material on the inner surface of the ceramic sheet to form a thermoplastic layer and a ceramic layer;
s300, bending the ceramic sheet and/or the ceramic layer to obtain the composite ceramic cover plate with a curved surface. The step S300 includes the step S310 of die casting the ceramic sheet to bend the ceramic sheet into a ceramic curved surface and/or the step S320 of hot pressing the thermoplastic layer to bend the ceramic layer to form a ceramic curved surface, so as to obtain the composite ceramic cover plate. The thermoplastic layer is hot-pressed in the step 320, and the thermoplastic layer drives the ceramic layer to be locally bent to obtain the composite ceramic cover plate, so that the manufacturing method of the invention abandons the traditional forming process of the ceramic cover plate, and drives the ceramic to be bent and formed by the composite thermoplastic material, thereby realizing the curve effect of external ceramic, and needing no low-efficiency grinding mode of a CNC lathe, not only saving the use of ceramic raw materials and improving the product qualification rate, but also being beneficial to reducing the forming thickness of the cover plate while keeping the hardness of the cover plate.
In addition, the manufacturing method of the composite ceramic cover plate comprises the steps of (S100) providing a ceramic sheet, (S310) bending the ceramic sheet into a ceramic curved surface in a die-casting mode, (S200) coating a thermoplastic resin material on the inner surface of the ceramic sheet to form the thermoplastic layer and the ceramic layer; or (S100) providing a ceramic sheet, (S310) die-casting the ceramic sheet to form a predetermined ceramic curved surface, where the bending range does not meet the standard, (S200) coating a thermoplastic resin material on the inner surface of the ceramic sheet to form the thermoplastic layer and the ceramic layer, and then (S320) hot-pressing the thermoplastic layer to drive the ceramic layer to bend to the standard ceramic curved surface. Wherein the method for manufacturing the ceramic cover plate further comprises the following steps: s400, grinding the outer surface of the ceramic sheet, so that the thickness of the ceramic sheet is thinned to be bendable and preset, and therefore, the ceramic layer is bent into a required curved surface effect along with the thermoplastic layer in the hot pressing process.
After the step S200, the step S100, or the step S300, that is, after the inner surface of the ceramic sheet is coated with the thermoplastic resin material, the outer surface of the ceramic layer is ground and thinned, or the ceramic sheet provided in the step S100 is ground and thinned first, and then the thermoplastic resin material is coated on the inner surface of the ceramic sheet, or the ceramic layer is ground and thinned after the composite ceramic cover plate with the curved surface is prepared first. Preferably, the step S400 is between the step S200 and the step S300.
Processing the ceramic sheet to 60-400 μm in the step S100, and preparing the ceramic sheet by a film extruding machine or a casting machine or an injection molding mode, preferably, the thickness of the ceramic sheet in the step S100 is 150 μm.
Wherein, in the step S200, the thermoplastic resin material is coated on the inner surface of the ceramic sheet by means of injection molding or thermoplastic molding at a molding temperature of the thermoplastic resin material. Since the molding temperature differs for each thermoplastic resin material, the temperature required for coating also differs. Wherein the coating thickness of the thermoplastic resin material is 100-400 μm.
Wherein, in the step S400, the outer surface of the ceramic sheet is ground by a flat grinding process, for example, the ceramic cover plate coated with the thermoplastic layer is placed on a flat grinding disc or a grinding disc, and the ceramic layer is ground and thinned to a preset thickness, for example, from 150 μm to 50 μm, to a thickness that can be hot-pressed and bent.
In step S310, the ceramic cover plate having the thermoplastic layer and the ceramic layer is placed in a hot pressing mold, the thermoplastic layer is hot-bent into a shape required by an electronic product such as a mobile phone by using the hot pressing mold, the thermoplastic layer drives the ceramic layer to be bent synchronously during the bending process, and the hot pressing temperature and pressure of the hot pressing mold are set according to the material of each thermoplastic layer. The hot pressing pressure is generally 30-60 Mpa, the temperature is suitable for hot pressing, otherwise, the temperature is too high, the frustration is easily caused, the cohesiveness between the ceramic layer and the thermoplastic layer is poor, cracks appear, and if the temperature is too low, the pressing time is prolonged, and the production efficiency is low.
Therefore, the composite ceramic cover plate does not need complicated instruments and manufacturing steps, optimizes the production process of the ceramic cover plate, greatly reduces the production cost of the ceramic cover plate, and is suitable for large-scale popularization and production.
The thermoplastic material on the inner side is compounded with the ceramic material on the outer side, so that the outer surface of the cover plate has the texture and the aesthetic degree of ceramic, the strength and the wear resistance of the cover plate are higher than those of a plastic cover plate by multiple orders of magnitude, and meanwhile, the elasticity of the cover plate is increased through the synergistic effect of the thermoplastic material and the ceramic material, and the falling resistance of the cover plate is improved. The elasticity of the thermoplastic layer can absorb stress caused by different external bending forces, so that the composite adhesion of the thermoplastic layer and the ceramic layer is improved. That is, compared with a pure plastic cover plate, the wear resistance, the strength and the hardness of the composite ceramic cover plate are improved, so that the thickness of the plastic is reduced, and the strength of the plastic is improved.
The composite ceramic cover plate is suitable for serving as a shell or a rear cover of an electronic product such as a mobile phone, a tablet personal computer, a camera, an electronic watch, a display and the like, is beneficial to upgrading of the outer surface of the electronic product, is also beneficial to application of wireless charging, and cannot shield electromagnetic signals, so that the replacement of the traditional high-grade metal cover plate is realized, the easy abrasion of plastics is avoided, and the composite ceramic cover plate is beneficial to the use of the mobile phone in the 5G era.
Example 1
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) processing a ceramic sheet to 60-400 microns through a film extruding machine or a casting machine, wherein the ceramic sheet is made of zirconia and alumina;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 100-400 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 0.5-200 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 30-60 Mpa, the hot-pressing temperature is 90-120 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Example 2
(1) Processing a ceramic sheet to 60 μm by a film extruder or a casting machine, wherein the material of the ceramic sheet comprises zirconium oxide and aluminum oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 300 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 10 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 45Mpa, the hot-pressing temperature is 100 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Example 3
(1) Processing a ceramic sheet to 200 μm by a film extruder or a casting machine, wherein the material of the ceramic sheet comprises zirconium oxide and aluminum oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 300 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 100 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 45Mpa, the hot-pressing temperature is 100 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Example 4
(1) Processing a ceramic sheet to 100 μm by a film extruder or a casting machine, wherein the material of the ceramic sheet comprises zirconium oxide and aluminum oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 300 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 50 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 45Mpa, the hot-pressing temperature is 100 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Example 5
(1) Processing a ceramic sheet to 400 μm by a film extruder or a casting machine, wherein the material of the ceramic sheet comprises zirconium oxide and aluminum oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 300 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 100 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 45Mpa, the hot-pressing temperature is 100 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Example 6
(1) Processing a ceramic sheet to 150 μm by a film extruder or a casting machine, wherein the material of the ceramic sheet comprises zirconium oxide and aluminum oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 100 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 100 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 45Mpa, the hot-pressing temperature is 100 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Example 7
(1) Processing a ceramic sheet to 80 μm by a film extruder or a casting machine, wherein the material of the ceramic sheet comprises zirconium oxide and aluminum oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 200 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 10 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 45Mpa, the hot-pressing temperature is 100 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Example 8
(1) Processing a ceramic sheet to 200 μm by a film extruder or a casting machine, wherein the material of the ceramic sheet comprises zirconium oxide and aluminum oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 250 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 100 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 45Mpa, the hot-pressing temperature is 100 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Example 9
(1) Processing a ceramic sheet to 150 μm by a film extruder or a casting machine, wherein the material of the ceramic sheet comprises zirconium oxide and aluminum oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 400 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 100 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 45Mpa, the hot-pressing temperature is 100 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Example 10
(1) Processing a ceramic sheet to 400 μm by a film extruder or a casting machine, wherein the material of the ceramic sheet comprises zirconium oxide and aluminum oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is ABS, the coating temperature is 200 ℃, and the coating thickness is 300 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 0.5 mu m; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 45Mpa, the hot-pressing temperature is 100 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Examples 11 to 20
The manufacturing methods of the composite ceramic cover plates of examples 11 to 20 are the same as those of example 10, except that in the step (3), the thickness is reduced to 5 μm, 10 μm, 20 μm, 50 μm, 70 μm, 100 μm, 120 μm, 150 μm, 180 μm, and 200 μm, respectively.
Example 21
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) processing a ceramic sheet to 60-400 microns through a film extruding machine or a casting machine, wherein the ceramic sheet is made of zirconium oxide, aluminum oxide and yttrium oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 100-400 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 0.5-200 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 30-60 Mpa, the hot-pressing temperature is 90-120 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Examples 22 to 40
The manufacturing methods of examples 22 to 40 are the same as those of examples 2 to 20, respectively, except that the ceramic layer is made of zirconia, alumina, and yttria.
EXAMPLE 41
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) processing a ceramic sheet to 60-400 microns through a film extruding machine or a casting machine, wherein the ceramic sheet is made of zirconium oxide, aluminum oxide and yttrium oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is PC, the coating temperature is 220-300 ℃, and the coating thickness is 100-400 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 0.5-200 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 30-60 Mpa, the hot-pressing temperature is 120-150 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Example 42
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) processing a ceramic sheet to 150 μm by a film extruder or a casting machine, wherein the material of the ceramic sheet comprises zirconium oxide, aluminum oxide and yttrium oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is PC, the coating temperature is 260 ℃, and the coating thickness is 300 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 100 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 50Mpa, the hot-pressing temperature is 130 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
The parameters in embodiment 41 can be adjusted accordingly, which is not listed here.
Example 43
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) processing a ceramic sheet to 60-400 microns through a film extruding machine or a casting machine, wherein the ceramic sheet is made of zirconium oxide, aluminum oxide and yttrium oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is PE, the coating temperature is 140-220 ℃, and the coating thickness is 100-400 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 0.5-200 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 30-60 Mpa, the hot-pressing temperature is 100-140 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Example 44
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) processing a ceramic sheet to 150 μm by a film extruder or a casting machine, wherein the material of the ceramic sheet comprises zirconium oxide, aluminum oxide and yttrium oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is PE, the coating temperature is 180 ℃, and the coating thickness is 300 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 100 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 45Mpa, the hot-pressing temperature is 100 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
The parameters in the embodiment 43 can be adjusted accordingly, which is not listed here.
Example 45
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) processing a ceramic sheet to 60-400 microns through a film extruding machine or a casting machine, wherein the ceramic sheet is made of zirconium oxide, aluminum oxide and yttrium oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is PP, the coating temperature is 190-230 ℃, and the coating thickness is 100-400 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 0.5-200 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 30-60 Mpa, the hot-pressing temperature is 93-121 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Example 46
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) processing a ceramic sheet to 150 μm by a film extruder or a casting machine, wherein the material of the ceramic sheet comprises zirconium oxide, aluminum oxide and yttrium oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is PP, the coating temperature is 210 ℃, and the coating thickness is 300 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 100 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 45Mpa, the hot-pressing temperature is 100 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
The parameters of the embodiment 45 can be adjusted accordingly, which is not listed here.
Example 47
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) processing a ceramic sheet to 60-400 microns through a film extruding machine or a casting machine, wherein the ceramic sheet is made of zirconium oxide, aluminum oxide, magnesium oxide and yttrium oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is PP, the coating temperature is 190-230 ℃, and the coating thickness is 100-400 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 0.5-200 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 30-60 Mpa, the hot-pressing temperature is 93-121 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
In the embodiments 1 to 47, only a part of the ceramic layer material and a part of the thermoplastic layer material are selected, and the specific material selection may be in a multi-component form or a single-component form, and the material may be subjected to corresponding improvement treatment.
Example 48
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) processing a ceramic sheet to 60-400 microns through a film extruding machine or a casting machine, wherein the ceramic sheet is made of zirconium oxide, aluminum oxide, yttrium oxide and magnesium oxide;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material in an injection molding or thermoplastic molding mode, wherein the thermoplastic resin material is PP and carbon nano tubes, the coating temperature is 190-230 ℃, and the coating thickness is 100-400 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 0.5-200 mu m to achieve a thickness capable of hot-pressing bending; and
(4) and hot-bending the thermoplastic layer to a required shape by using a hot-pressing die, wherein the hot-pressing pressure is 30-60 Mpa, the hot-pressing temperature is 93-121 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a curved surface required by the rear cover, so that the composite ceramic cover plate is manufactured.
Example 49
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) processing a ceramic sheet to 60-400 microns through a film extruding machine or a casting machine, wherein the ceramic sheet is made of zirconia and alumina;
(2) then forming a ceramic curved surface effect in a die casting mode, coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 100-400 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the composite ceramic through a grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a grinding machine, and grinding and thinning the ceramic sheet to a preset thickness of 0.5-200 mu m to obtain the composite ceramic cover plate.
Example 50
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) processing a ceramic sheet to 60-400 microns through a film extruding machine or a casting machine, wherein the ceramic sheet is made of zirconia and alumina;
(2) preliminarily forming a preset ceramic curved surface effect in a die casting mode, and coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 100-400 mu m, so as to form the thermoplastic layer;
(3) hot-pressing the thermoplastic layer, and hot-bending the thermoplastic layer to a required standard shape by using a hot-pressing mold, wherein the hot-pressing pressure is 30-60 Mpa, the hot-pressing temperature is 90-120 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a standard curved surface required by a rear cover, so that the composite ceramic cover plate is manufactured;
(4) grinding the outer surface of the composite ceramic through a grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a grinding machine, and grinding and thinning the ceramic sheet to a preset thickness of 0.5-200 mu m to obtain the composite ceramic cover plate.
Example 51
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) forming a ceramic curved surface effect in a ceramic injection molding mode;
(2) coating the thermoplastic resin material on the inner surface of the ceramic sheet at the molding temperature of the thermoplastic resin material, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 100-400 mu m, so as to form the thermoplastic layer;
(3) grinding the outer surface of the composite ceramic through a grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a grinding machine, and grinding and reducing the thickness of the ceramic sheet to a preset thickness of 0.5-200 mu m; and (4) preparing the composite ceramic cover plate.
Example 52
A method of manufacturing a composite ceramic deck, comprising the steps of:
(1) providing a ceramic sheet by means of injection molding;
(2) preliminarily forming a preset ceramic curved surface effect in a die casting mode, and coating the thermoplastic resin material on the inner surface of the ceramic sheet at the forming temperature of the thermoplastic resin material, wherein the thermoplastic resin material is ABS, the coating temperature is 160-240 ℃, and the coating thickness is 100-400 mu m, so as to form the thermoplastic layer;
(3) hot-pressing the thermoplastic layer, and hot-bending the thermoplastic layer to a required standard shape by using a hot-pressing mold, wherein the hot-pressing pressure is 30-60 Mpa, the hot-pressing temperature is 90-120 ℃, and the thermoplastic layer drives the ceramic layer to bend to form a standard curved surface required by a rear cover, so that the composite ceramic cover plate is manufactured;
(4) grinding the outer surface of the composite ceramic through a grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a grinding machine, and grinding and thinning the ceramic sheet to a preset thickness of 0.5-200 mu m to obtain the composite ceramic cover plate.
Since there are many alternative combinations of materials for the ceramic layer and the thermoplastic layer, there are also many combinations of manufacturing process steps, which are not listed here.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. A manufacturing method of a composite ceramic cover plate is characterized in that the composite ceramic cover plate comprises a ceramic layer and a thermoplastic layer, the ceramic layer is arranged on the outer side of the composite ceramic cover plate, the thermoplastic layer is compounded on the inner surface of the ceramic layer, the thickness of the ceramic layer is 5-20 μm, the thickness of the thermoplastic layer is 200-300 μm, and the manufacturing method comprises the following steps:
s100, processing the ceramic sheet to 60-400 mu m through a film extruding machine or a casting machine;
s200, coating the thermoplastic resin material on the inner surface of the ceramic sheet at the coating temperature of 160-240 ℃ and the coating thickness of 200-300 mu m to form a thermoplastic layer and a ceramic layer;
s400, grinding the outer surface of the ceramic sheet by a plane grinding process, placing the ceramic cover plate coated with the thermoplastic layer on a flat grinding disc or a grinding disc, and grinding and thinning the ceramic sheet to a preset thickness of 5-20 microns to achieve a thickness capable of hot-pressing bending; and
s300, hot-pressing the thermoplastic layer to drive the ceramic layer to bend to form a ceramic curved surface, and thus obtaining the composite ceramic cover plate with the curved surface, wherein the hot-pressing pressure is 30-60 MPa, and the hot-pressing temperature is 90-120 ℃.
2. The method for manufacturing a composite ceramic cover plate according to claim 1, wherein the material of the ceramic layer is selected from one or more of oxide ceramic, carbide ceramic, nitride ceramic and boride ceramic, and the oxide ceramic is selected from one or more of zirconia, alumina, silica, magnesia, chromia, beryllia, vanadic oxide, diboron trioxide, zinc oxide, yttria, calcia and ceria.
3. The method of manufacturing a composite ceramic cover plate according to claim 2, wherein the ceramic layer comprises zirconia, yttria and alumina.
4. The method of manufacturing a composite ceramic cover plate according to claim 1, wherein the ceramic layer has a thickness of 10 μm.
5. The method for manufacturing a composite ceramic cover plate according to any one of claims 1 to 4, wherein the thermoplastic resin material is one or more selected from the group consisting of polycarbonate, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer, polyamide, polyethylene, polypropylene, polyvinyl chloride, polytetrafluoroethylene, polystyrene, polyetherimide, polyethersulfone, polysulfone, polyphthalamide, polyphenylene sulfide, polybutylene terephthalate, polyethylene terephthalate, hydrogenated styrene-butadiene block copolymer, polyether ether ketone, polypropylene terephthalate, and silicone-based resin.
6. The method of manufacturing a composite ceramic deck according to claim 5, wherein the thermoplastic resin material is selected from one or more of nylon 6, nylon 66, nylon 46.
7. The method of manufacturing a composite ceramic cover plate according to claim 5, wherein the composite ceramic cover plate is applied to a case or a rear cover of a mobile phone, a tablet computer, a camera, an electronic watch, and a display.
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