CN111689774A - Preparation process of ceramic rear cover - Google Patents
Preparation process of ceramic rear cover Download PDFInfo
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- CN111689774A CN111689774A CN202010416417.1A CN202010416417A CN111689774A CN 111689774 A CN111689774 A CN 111689774A CN 202010416417 A CN202010416417 A CN 202010416417A CN 111689774 A CN111689774 A CN 111689774A
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- rear cover
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- mobile phone
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- 239000000919 ceramic Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000002002 slurry Substances 0.000 claims abstract description 31
- 238000005266 casting Methods 0.000 claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000011230 binding agent Substances 0.000 claims abstract description 19
- 150000001875 compounds Chemical class 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000011268 mixed slurry Substances 0.000 claims abstract description 14
- 239000000725 suspension Substances 0.000 claims abstract description 14
- 239000002270 dispersing agent Substances 0.000 claims abstract description 13
- 239000004014 plasticizer Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 238000001238 wet grinding Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000853 adhesive Substances 0.000 claims abstract description 7
- 230000001070 adhesive effect Effects 0.000 claims abstract description 7
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 7
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 7
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 7
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 7
- 238000005245 sintering Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 239000012745 toughening agent Substances 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920001558 organosilicon polymer Polymers 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000004843 novolac epoxy resin Substances 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 6
- 229920005573 silicon-containing polymer Polymers 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004814 ceramic processing Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- 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
- C04B35/486—Fine ceramics
- C04B35/488—Composites
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- 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
- C04B35/49—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 containing also titanium oxides or titanates
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63452—Polyepoxides
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- 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
- C04B41/49—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes
- C04B41/4905—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon
- C04B41/495—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon applied to the substrate as oligomers or polymers
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- 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
- C04B41/84—Compounds having one or more carbon-to-metal of carbon-to-silicon linkages
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0279—Improving the user comfort or ergonomics
- H04M1/0283—Improving the user comfort or ergonomics for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/18—Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment
- H04M1/185—Improving the rigidity of the casing or resistance to shocks
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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Abstract
The invention discloses a preparation process of a ceramic rear cover, which comprises the following steps: the method comprises the following steps: preparing high-purity nano zirconia powder into a suspension by using deionized water with the concentration of 90%, adding a dispersing agent into the suspension, adding a wear-resistant compound, TiO2 and SiO2, and stirring by using an external stirrer; step two: adding a binding agent into the adhesive obtained in the step one to obtain doped modified nano zirconia powder; step three: mixing the substance obtained in the step two and an organic plasticizer solution according to a proper proportion to prepare mixed slurry with a certain viscosity, and carrying out wet grinding on the mixed slurry to obtain casting slurry; the added wear-resistant compound can increase the wear resistance of the finished product, ensure that the wear resistance is improved, the generation of surface scratches is reduced, the service life is prolonged, and the attractiveness is ensured; through the limitation to the concentration of the deionized water, the purity is higher in the front-stage batching, and the later-stage service performance is stronger.
Description
Technical Field
The invention belongs to the technical field of mobile phone rear cover processing, and particularly relates to a preparation process of a ceramic rear cover.
Background
The mobile phone rear cover is an important component of the mobile phone, plays an integral protection function, is generally processed by adopting PVC materials, at present, the change of metal, glass, ceramic and mobile phone shell materials also brings about a great opportunity for the market of processing equipment, wherein the ceramic processing is gradually the mainstream, and has high refractive index and strong dispersion due to mellow color and luster, and good instant viewing effect; the heat conductivity is low, and the jade is warm and moist; the skin is more friendly compared with metal and plastic; signals cannot be shielded, and the layout of the antenna cannot be influenced; the mechanical property is good, the bending strength is high, the Mohs hardness is similar to that of sapphire, the bending resistance and the wear resistance are achieved, and the processing method is mainly divided into the following steps: injection molding, dry pressing molding and tape casting molding.
The existing ceramic rear cover is low in wear resistance in preparation, the situation of surface residual scratches easily occurs in high-strength abrasion, the use attractiveness is greatly influenced, and the service life of the ceramic rear cover is greatly influenced.
Disclosure of Invention
The invention aims to provide a preparation process of a ceramic rear cover, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation process of a ceramic rear cover comprises the following steps:
the method comprises the following steps: preparing high-purity nano zirconia powder into a suspension by using deionized water with the concentration of 90%, adding a dispersing agent into the suspension, adding a wear-resistant compound, TiO2 and SiO2, and stirring by using an external stirrer;
step two: adding a binding agent into the adhesive obtained in the step one to obtain doped modified nano zirconia powder;
step three: mixing the substance obtained in the step two and an organic plasticizer solution according to a proper proportion to prepare mixed slurry with a certain viscosity, and carrying out wet grinding on the mixed slurry to obtain casting slurry;
step four: carrying out vacuum defoaming treatment on the casting slurry, enabling the casting slurry to flow into a zirconia ceramic mobile phone rear cover mold from a container, coating the casting slurry on the zirconia ceramic mobile phone rear cover mold in a scraping manner by using a scraper according to the thickness of the zirconia ceramic mobile phone rear cover, and sintering;
step five: and C, carrying out CNC (computerized numerical control) processing on the blank obtained in the fourth step to obtain a finished product of the zirconia ceramic mobile phone rear cover.
Preferably, the stirring time of the stirrer in the step one is 1-3 min.
Preferably, the wear-resistant compound in the first step comprises epoxy resin, novolac epoxy resin, organic silicon resin and DBT-7 toughening agent, and the ratio is 2: 2: 2: 4.
preferably, the binder in the second step can be divided into lubricant, plasticizer, dispersant and surfactant.
Preferably, the wet grinding temperature in the third step is 15-18 ℃, the grinding time is 36-50 h, and the obtained premixed slurry with the particle size of 20-30 nm is obtained.
Preferably, the ratio of the binding agent to the high-purity nano zirconia powder is 1: 9.
preferably, the sintering temperature in the fourth step is 800-1500 ℃, and the sintering time is 50-120 min.
Preferably, the method further comprises the step of attaching an organic silicon polymer film to the obtained product after CNC processing, wherein the thickness of the organic silicon polymer film is 8-14 nm.
Compared with the prior art, the invention has the beneficial effects that: the added wear-resistant compound can increase the wear resistance of the finished product, ensure that the wear resistance is improved, the generation of surface scratches is reduced, the service life is prolonged, and the attractiveness is ensured; through the limitation to the concentration of the deionized water, the purity is higher in the front-stage batching, and the later-stage service performance is stronger.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a technical scheme that: a preparation process of a ceramic rear cover comprises the following steps:
the method comprises the following steps: preparing high-purity nano zirconia powder into suspension by using deionized water with the concentration of 90%, adding a dispersing agent into the suspension, adding a wear-resistant compound, TiO2 and SiO2, and stirring by using an external stirrer;
step two: adding a binding agent into the adhesive obtained in the step one to obtain doped modified nano zirconia powder;
step three: mixing the substance obtained in the step two and an organic plasticizer solution according to a proper proportion to prepare mixed slurry with a certain viscosity, and carrying out wet grinding on the mixed slurry to obtain casting slurry;
step four: carrying out vacuum defoaming treatment on the casting slurry, enabling the casting slurry to flow into a zirconia ceramic mobile phone rear cover mold from a container, coating the casting slurry on the zirconia ceramic mobile phone rear cover mold in a scraping manner by using a scraper according to the thickness of the zirconia ceramic mobile phone rear cover, and sintering;
step five: and C, carrying out CNC (computerized numerical control) processing on the blank obtained in the fourth step to obtain a finished product of the zirconia ceramic mobile phone rear cover.
In this embodiment, the stirring time of the stirrer in the first step is preferably 3 min.
In this embodiment, preferably, the wear-resistant compound in the step one is a DBT-7 toughening agent, and the wear resistance of the finished product can be increased by adding the wear-resistant compound, so that the wear resistance is improved, the generation of surface scratches is reduced, the service life is prolonged, the aesthetic property is ensured, and the ratio is 2: 2: 2: 4.
in this embodiment, the binder in step two may be preferably divided into a lubricant, a plasticizer, a dispersant, and a surfactant.
In this embodiment, preferably, the wet grinding temperature in the third step is 18 ℃, the grinding time is 36-50 hours, and the obtained premixed slurry with the particle size of 30nm is obtained.
In this embodiment, preferably, the ratio of the binder to the high-purity nano zirconia powder is 1: 9.
in this embodiment, preferably, the sintering temperature in the fourth step is 1500 ℃, and the sintering time is 120 min.
Example 2
The invention provides a technical scheme that: a preparation process of a ceramic rear cover comprises the following steps:
the method comprises the following steps: preparing high-purity nano zirconia powder into suspension by using deionized water with the concentration of 90%, adding a dispersing agent into the suspension, adding a wear-resistant compound, TiO2 and SiO2, and stirring by using an external stirrer;
step two: adding a binding agent into the adhesive obtained in the step one to obtain doped modified nano zirconia powder;
step three: mixing the substance obtained in the step two and an organic plasticizer solution according to a proper proportion to prepare mixed slurry with a certain viscosity, and carrying out wet grinding on the mixed slurry to obtain casting slurry;
step four: carrying out vacuum defoaming treatment on the casting slurry, enabling the casting slurry to flow into a zirconia ceramic mobile phone rear cover mold from a container, coating the casting slurry on the zirconia ceramic mobile phone rear cover mold in a scraping manner by using a scraper according to the thickness of the zirconia ceramic mobile phone rear cover, and sintering;
step five: and C, carrying out CNC (computerized numerical control) processing on the blank obtained in the fourth step to obtain a finished product of the zirconia ceramic mobile phone rear cover.
In this embodiment, the stirring time of the stirrer in the first step is preferably 1 min.
In this embodiment, preferably, the wear-resistant compound in the step one is an organic silicon resin and a DBT-7 toughening agent, and by adding the wear-resistant compound, the wear resistance of the finished product can be increased, so that the wear resistance is improved in later use, the generation of surface scratches is reduced, the service life is prolonged, and meanwhile, the appearance is ensured, and the ratio is 2: 2: 2: 4.
in this embodiment, the binder in step two may be preferably divided into a lubricant, a plasticizer, a dispersant, and a surfactant.
In this embodiment, preferably, the wet grinding temperature in the third step is 15 ℃, the grinding time is 36-50 hours, and the obtained premixed slurry with the particle size of 20nm is obtained.
In this embodiment, preferably, the ratio of the binder to the high-purity nano zirconia powder is 1: 9.
in this embodiment, preferably, the sintering temperature in the fourth step is 800 to 1500 ℃, and the sintering time is 50 min.
Example 3
The invention provides a technical scheme that: a preparation process of a ceramic rear cover comprises the following steps:
the method comprises the following steps: preparing high-purity nano zirconia powder into suspension by using deionized water with the concentration of 90%, adding a dispersing agent into the suspension, adding a wear-resistant compound, TiO2 and SiO2, and stirring by using an external stirrer;
step two: adding a binding agent into the adhesive obtained in the step one to obtain doped modified nano zirconia powder;
step three: mixing the substance obtained in the step two and an organic plasticizer solution according to a proper proportion to prepare mixed slurry with a certain viscosity, and carrying out wet grinding on the mixed slurry to obtain casting slurry;
step four: carrying out vacuum defoaming treatment on the casting slurry, enabling the casting slurry to flow into a zirconia ceramic mobile phone rear cover mold from a container, coating the casting slurry on the zirconia ceramic mobile phone rear cover mold in a scraping manner by using a scraper according to the thickness of the zirconia ceramic mobile phone rear cover, and sintering;
step five: and C, carrying out CNC (computerized numerical control) processing on the blank obtained in the fourth step to obtain a finished product of the zirconia ceramic mobile phone rear cover.
In this embodiment, the stirring time of the stirrer in the first step is preferably 3 min.
In this embodiment, preferably, the wear-resistant compound in step one is epoxy resin, novolac epoxy, through the wear-resistant compound that adds, can increase the wearability behind the finished product, guarantees in the use in later stage, improves the wearability, reduces the production of surface scratch, has prolonged life, guarantees the aesthetic property simultaneously, and the proportion is 2: 2: 2: 4.
in this embodiment, the binder in step two may be preferably divided into a lubricant, a plasticizer, a dispersant, and a surfactant.
In this embodiment, preferably, the wet grinding temperature in the third step is 15 to 18 ℃, the grinding time is 47 hours, and the obtained premixed slurry with the particle size of 23nm is obtained.
In this embodiment, preferably, the ratio of the binder to the high-purity nano zirconia powder is 1: 9.
in this embodiment, the sintering temperature in the fourth step is preferably 1500 ℃, and the sintering time is preferably 80 min.
In this embodiment, it is preferable that after the CNC processing, a silicone polymer film is attached to the obtained product, and the thickness of the silicone polymer film is 8 nm.
Example 4
The invention provides a technical scheme that: a preparation process of a ceramic rear cover comprises the following steps:
the method comprises the following steps: preparing high-purity nano zirconia powder into suspension by using deionized water with the concentration of 90%, adding a dispersing agent into the suspension, adding a wear-resistant compound, TiO2 and SiO2, and stirring by using an external stirrer;
step two: adding a binding agent into the adhesive obtained in the step one to obtain doped modified nano zirconia powder;
step three: mixing the substance obtained in the step two and an organic plasticizer solution according to a proper proportion to prepare mixed slurry with a certain viscosity, and carrying out wet grinding on the mixed slurry to obtain casting slurry;
step four: carrying out vacuum defoaming treatment on the casting slurry, enabling the casting slurry to flow into a zirconia ceramic mobile phone rear cover mold from a container, coating the casting slurry on the zirconia ceramic mobile phone rear cover mold in a scraping manner by using a scraper according to the thickness of the zirconia ceramic mobile phone rear cover, and sintering;
step five: and C, carrying out CNC (computerized numerical control) processing on the blank obtained in the fourth step to obtain a finished product of the zirconia ceramic mobile phone rear cover.
In this embodiment, the stirring time of the stirrer in the first step is preferably 3 min.
In this embodiment, preferably, the wear-resistant compound in the first step is epoxy resin and a DBT-7 toughening agent, and the ratio is 2: 2: 2: 4.
in this embodiment, the binder in step two may be preferably divided into a lubricant, a plasticizer, a dispersant, and a surfactant.
In this embodiment, preferably, the wet grinding temperature in step three is 18 ℃, the grinding time is 50h, and the obtained premixed slurry with the particle size of 20nm is obtained.
In this embodiment, preferably, the ratio of the binder to the high-purity nano zirconia powder is 1: 9.
in this embodiment, preferably, the sintering temperature in the fourth step is 800 ℃ and the sintering time is 120 min.
In this embodiment, it is preferable that after the CNC processing, a silicone polymer film is attached to the obtained product, and the thickness of the silicone polymer film is 14 nm.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A preparation process of a ceramic rear cover is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: preparing high-purity nano zirconia powder into a suspension by using deionized water with the concentration of 90%, adding a dispersing agent into the suspension, adding a wear-resistant compound, TiO2 and SiO2, and stirring by using an external stirrer;
step two: adding a binding agent into the adhesive obtained in the step one to obtain doped modified nano zirconia powder;
step three: mixing the substance obtained in the step two and an organic plasticizer solution according to a proper proportion to prepare mixed slurry with a certain viscosity, and carrying out wet grinding on the mixed slurry to obtain casting slurry;
step four: carrying out vacuum defoaming treatment on the casting slurry, enabling the casting slurry to flow into a zirconia ceramic mobile phone rear cover mold from a container, coating the casting slurry on the zirconia ceramic mobile phone rear cover mold in a scraping manner by using a scraper according to the thickness of the zirconia ceramic mobile phone rear cover, and sintering;
step five: and C, carrying out CNC (computerized numerical control) processing on the blank obtained in the fourth step to obtain a finished product of the zirconia ceramic mobile phone rear cover.
2. The process for preparing the ceramic rear cover according to claim 1, wherein: and the stirring time of the stirrer in the step one is 1-3 min.
3. The process for preparing the ceramic rear cover according to claim 1, wherein: the wear-resistant compound in the first step comprises epoxy resin, novolac epoxy resin, organic silicon resin and DBT-7 toughening agent, and the proportion is 2: 2: 2: 4.
4. the process for preparing the ceramic rear cover according to claim 1, wherein: the binder in the second step can be divided into lubricant, plasticizer, dispersant and surfactant.
5. The process for preparing the ceramic rear cover according to claim 1, wherein: and in the third step, the wet grinding temperature is 15-18 ℃, the grinding time is 36-50 h, and the obtained premixed slurry with the particle size of 20-30 nm is obtained.
6. The process for preparing the ceramic rear cover according to claim 4, wherein: the ratio of the binding agent to the high-purity nano zirconia powder is 1: 9.
7. the process for preparing the ceramic rear cover according to claim 1, wherein: and the sintering temperature in the fourth step is 800-1500 ℃, and the sintering time is 50-120 min.
8. The process for preparing the ceramic rear cover according to claim 1, wherein: the method also comprises the step of attaching an organic silicon polymer film to the obtained product after CNC processing, wherein the thickness of the organic silicon polymer film is 8-14 nm.
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Application publication date: 20200922 |