CN116675515A - Ceramic mobile phone cover and preparation method thereof - Google Patents

Ceramic mobile phone cover and preparation method thereof Download PDF

Info

Publication number
CN116675515A
CN116675515A CN202310460651.8A CN202310460651A CN116675515A CN 116675515 A CN116675515 A CN 116675515A CN 202310460651 A CN202310460651 A CN 202310460651A CN 116675515 A CN116675515 A CN 116675515A
Authority
CN
China
Prior art keywords
ceramic
mobile phone
phone cover
dispersing agent
grinding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310460651.8A
Other languages
Chinese (zh)
Inventor
宛正波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Qianxin Communication Technology Co ltd
Original Assignee
Anhui Qianxin Communication Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui Qianxin Communication Technology Co ltd filed Critical Anhui Qianxin Communication Technology Co ltd
Priority to CN202310460651.8A priority Critical patent/CN116675515A/en
Publication of CN116675515A publication Critical patent/CN116675515A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00Clay-wares
    • C04B33/02Preparing or treating the raw materials individually or as batches
    • C04B33/13Compounding ingredients
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00Clay-wares
    • C04B33/32Burning methods
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets
    • H04M1/0202Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0279Improving the user comfort or ergonomics
    • H04M1/0283Improving the user comfort or ergonomics for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets
    • H04M1/18Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment
    • H04M1/185Improving the rigidity of the casing or resistance to shocks
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3225Yttrium oxide or oxide-forming salts thereof
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3244Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/66Specific sintering techniques, e.g. centrifugal sintering
    • C04B2235/661Multi-step sintering
    • C04B2235/662Annealing after sintering
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9646Optical properties
    • C04B2235/9661Colour

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Signal Processing (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention discloses a ceramic mobile phone cover, which comprises the following raw materials: 48-65% of ceramic particles, 3.2-5% of adhesive, 0.1-1% of dispersing agent, 1.2-2.6% of plasticizer and 30.1-45.1% of solvent; the preparation method of the ceramic mobile phone cover comprises the following steps: s1, mixing ceramic particles, a solvent and a dispersing agent; s2, carrying out dry-pressing sintering on the mixed raw materials; s3, grinding the biscuit by a grinding machine; s4, CNC inner cavity machining and cambered surface appearance machining; s5, fine grinding a plane, annealing and laser cutting; s6, surface treatment; the ceramic particles realize the integral coloring of the mobile phone cover, adopt pure natural colors, improve the purity and safety of the colors, realize short sintering time and high production efficiency through multiple process treatments, improve the integrity of crystals and improve the fracture toughness of ceramics through the sintering treatment; the integral plate has the advantages of high strength, high toughness, high hardness, accurate size control and the like.

Description

Ceramic mobile phone cover and preparation method thereof
Technical Field
The invention belongs to the technical field of ceramic mobile phone covers, and particularly relates to a ceramic mobile phone cover and a preparation method thereof.
Background
The mobile phone is generally called a mobile phone or a wireless phone, is generally called a mobile phone, is originally only a communication tool, is divided into a smart phone and a non-smart phone, and the performance of the general smart phone is better than that of the non-smart phone, but the performance of the non-smart phone is more stable than that of the smart phone, the development of the mobile phone industry is very rapid, the evolution from a plastic body to a metal body to a glass body is completed in less than ten years of taking the material of the body, the market occupation ratio of the ceramic body mobile phone is gradually increasing in recent years, zirconia ceramics has excellent physical properties and good mechanical properties, and along with the development of the molding technology, the zirconia ceramic has wide application in various fields such as medical treatment, electronic products, sensors and the like. The mobile phone body with the zirconia ceramic material adopted by the mobile phone rear cover has good communication signal transmittance and strong signal receiving capability, the hardness, the density, the bending strength and the like of the mobile phone body are obviously superior to those of plastic and glass materials, and the mobile phone rear cover has the characteristics of no electromagnetic interference and no magnetism.
Although the ceramic mobile phone rear cover with high strength, high toughness and high hardness is prepared more simply and rapidly, the problem that the existing ceramic mobile phone cover cannot realize color integration, surface treatment on the ceramic mobile phone cover and touch feeling improvement of the ceramic mobile phone cover cannot be realized when the ceramic mobile phone cover is prepared is not solved, and the ceramic mobile phone cover and the preparation method thereof are provided.
Disclosure of Invention
The invention aims to provide a ceramic mobile phone cover and a preparation method thereof, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: a ceramic mobile phone cover, which comprises the following raw materials:
48-65% of ceramic particles, 3.2-5% of adhesive, 0.1-1% of dispersing agent, 1.2-2.6% of plasticizer and 30.1-45.1% of solvent;
still more particularly, the ceramic particles comprise 50.3-58.2% of clay, 20.2-40.5% of white zirconia, 2-6% of yttrium oxide, 0.5-7% of aluminum oxide and 0.5-13% of colorant;
the colorant adopts a plurality of ores with different colors, namely the ores with different colors are respectively crushed, then the colors are extracted through elutriation, clarification, flying and falling, namely the elutriation is to elutriate impurities with water, clarification is a clarification and precipitation process, flying is to skim a layer of pigment floating on the upper surface, so-called taking bleaching, and falling is to stir up the sinking part again for reprecipitation;
the ceramic particles are prepared by mixing ceramic mud, zirconia, yttria, alumina and a colorant in proportion, and then firing the ceramic mud, zirconia, yttria, alumina and the colorant into ceramic particles.
Preferably, the adhesive comprises a solvent, a curing agent, a toughening agent, a preservative and an auxiliary component of a defoaming agent in addition to the sizing material, wherein the sizing material comprises animal glue and synthetic resin, and one or more of epoxy resin, phenolic resin, polyvinyl acetal, perchloroethylene resin, neoprene and nitrile rubber.
Preferably, the dispersing agent comprises an inorganic dispersing agent and an organic dispersing agent, the inorganic dispersing agent comprises silicate and alkali metal phosphate, the silicate adopts water glass, the alkali metal phosphate adopts sodium tripolyphosphate, sodium hexametaphosphate and sodium pyrophosphate, and the organic dispersing agent comprises one or more of triethylhexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives, polyacrylamide, guar gum and fatty acid polyethylene glycol ester.
Preferably, the plasticizer is polyethylene glycol or dibutyl phthalate, and the solvent is alcohol, including one or more of n-butanol, methyl ethyl ketone, toluene, ethanol, methyl ethyl ketone and trichloroethylene, or a mixture thereof.
Preferably, the natural ore adopted by the colorant comprises malachite, turquoise, cinnabar, copper blue ore, celadon, realgar, cinnabar, ocher, clam powder, kaolin, zinc white, titanium white, lithopone and gold, and carbon black, mainly carbide of plants.
The preparation method of the ceramic mobile phone cover comprises the following steps:
s1, mixing ceramic particles, a solvent and a dispersing agent: fully mixing ceramic particles, a solvent and a dispersing agent, and slowly stirring through ball milling during mixing, so as to fully mix;
s2, carrying out dry-pressing sintering on the mixed raw materials: the mixed raw materials are pressed into a compact green body with a certain shape under the action of pressure, then when the solid green body is heated at a high temperature, solid particles in the green body can undergo substance migration, the green body is contracted when reaching a certain temperature, the growth of crystal grains appears, and with the elimination of air holes, the green body becomes a polycrystalline ceramic material at a temperature lower than the melting point;
s3, grinding the biscuit by a grinding machine: edging and flattening the four edges of the outline of the blank by using a diamond grinding wheel grinder, and carrying out rough grinding on the back surface to reduce the thickness;
s4, CNC inner cavity machining and cambered surface appearance machining: processing the curved surface, the inner height and the peripheral size of the inner cavity through CNC inner cavity processing; CNC arc surface appearance processing is mainly to process the outer arc surface of the mobile phone rear cover;
s5, fine grinding plane, annealing and laser cutting: after fine grinding correction of plane warpage, stress is eliminated through annealing treatment for larger stress deformation, laser cutting of the camera hole and the flash hole is carried out after rough polishing, and then the laser cut hole and the arc surface appearance are subjected to fine grinding by adopting an electroplated diamond grinding head;
s6, surface treatment: the method for forming the metal or compound coating with special performance on the surface of the workpiece through the PVD process, and then plating a layer of coating on the surface of the ceramic through the AF process, wherein the coating ensures that fingerprints are not easy to generate on the surface of the ceramic, and the wear resistance is good.
Preferably, the ceramic particles, the solvent and the dispersing agent in S1 are ball-milled and mixed by ball milling when being mixed, so that the grinding of the ceramic particles and the mixing can be realized, the ball milling adopts two-stage ball milling treatment, and the adhesive and the plasticizer are added into the raw materials after grinding.
Preferably, the dry-pressing sintering in the step S2 presses the raw materials into a compact blank with a certain shape, the blank is composed of a plurality of single ceramic particles before sintering, a plurality of air holes are formed in the blank, and the porosity is generally 40% -60%; when the solid biscuit is heated at high temperature, solid particles in the biscuit can undergo substance migration, the biscuit shrinks when reaching a certain temperature, the grain growth is large, air holes are eliminated, and finally the biscuit becomes a polycrystalline ceramic material at a temperature lower than the melting point.
Preferably, the sintering in S2 is performed at several temperature sections, i.e. sintering is performed at 600-650 ℃ for 1-4 hours, then at 1350-1500 ℃ for a period of time, and then the ceramic shell is obtained after being put into an annealing furnace.
Preferably, the PVD process of the surface treatment in S6 adopts evaporation plating or sputtering plating, logo or color film is plated on the ceramic cover plate, and the AF treatment uses an evaporation method, and microcrack detection, profile tolerance, overall warpage, section warpage and thickness detection are performed on the ceramic cover plate after the surface treatment.
Compared with the prior art, the invention has the beneficial effects that:
when the ceramic cover is used, the colorant is added into ceramic particles, namely the colored ceramic particles are used for realizing the integral coloring of the mobile phone cover, so that the abrasion of the mobile phone cover is reduced, chromatic aberration or colored glaze falling off is caused, the pure color and the safety are improved, the sintering time is short, the production efficiency is high, the integrity of crystals is improved, and the fracture toughness of ceramics is improved by adopting pure natural color and performing multiple process treatment; forming a whole plate, and reducing the subsequent CNC processing cost; and the prepared ceramic mobile phone rear cover has the advantages of high strength, high toughness, high hardness, accurate size control and the like.
Drawings
FIG. 1 is a flow chart of the steps of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution: a ceramic mobile phone cover, which comprises the following raw materials:
48-65% of ceramic particles, 3.2-5% of adhesive, 0.1-1% of dispersing agent, 1.2-2.6% of plasticizer and 30.1-45.1% of solvent;
still more particularly, the ceramic particles comprise 50.3-58.2% of clay, 20.2-40.5% of white zirconia, 2-6% of yttrium oxide, 0.5-7% of aluminum oxide and 0.5-13% of colorant;
the colorant adopts a plurality of ores with different colors, namely the ores with different colors are respectively crushed, then the colors are extracted through elutriation, clarification, flying and falling, namely the elutriation is to elutriate impurities with water, clarification is a clarification and precipitation process, flying is to skim a layer of pigment floating on the upper surface, so-called taking bleaching, and falling is to stir up the sinking part again for reprecipitation;
the ceramic particles are prepared by mixing ceramic mud, zirconia, yttria, alumina and a colorant in proportion, and then firing the ceramic mud, zirconia, yttria, alumina and the colorant into ceramic particles.
The binder can effectively improve the connectivity among ceramic particles and is convenient to form a whole, and in the embodiment, preferably, the binder comprises a solvent, a curing agent, a toughening agent, a preservative and an antifoaming agent auxiliary component in addition to a sizing material, wherein the sizing material comprises animal glue and synthetic resin and one or more of epoxy resin, phenolic resin, polyvinyl acetal, perchloroethylene resin, chloroprene rubber and nitrile rubber.
The use of the dispersing agent can effectively improve the oily and aqueous adhesion between ceramic particles, and is convenient to mix with a solvent, in this embodiment, preferably, the dispersing agent comprises an inorganic dispersing agent and an organic dispersing agent, the inorganic dispersing agent comprises silicate and alkali metal phosphate, the silicate adopts water glass, the alkali metal phosphate adopts sodium tripolyphosphate, sodium hexametaphosphate and sodium pyrophosphate, and the organic dispersing agent comprises one or more of triethylhexyl phosphoric acid, sodium dodecyl sulfate, methylpentanol, cellulose derivatives, polyacrylamide, guar gum and fatty acid polyethylene glycol ester.
The use of a plasticizer and a solvent can effectively achieve the mixing of the ceramic particles, and in this embodiment, preferably, the plasticizer is polyethylene glycol or dibutyl phthalate, and the solvent is an alcohol substance including one or more of n-butanol, methyl ethyl ketone, toluene, ethanol, methyl ethyl ketone and trichloroethylene, or a mixture thereof.
The color is formed by pure natural minerals, so that the purity and durability of the color can be improved, and in the embodiment, preferably, the natural minerals adopted by the colorant comprise malachite, turquoise, cinnabar, blue copper ore, celadon, realgar, cinnabar, ocher, clam powder, kaolin, zinc white, titanium white, lithopone and gold, and carbon black is mainly carbide of plants.
The preparation method of the ceramic mobile phone cover comprises the following steps:
s1, mixing ceramic particles, a solvent and a dispersing agent: fully mixing ceramic particles, a solvent and a dispersing agent, and slowly stirring through ball milling during mixing, so as to fully mix;
s2, carrying out dry-pressing sintering on the mixed raw materials: the mixed raw materials are pressed into a compact green body with a certain shape under the action of pressure, then when the solid green body is heated at a high temperature, solid particles in the green body can undergo substance migration, the green body is contracted when reaching a certain temperature, the growth of crystal grains appears, and with the elimination of air holes, the green body becomes a polycrystalline ceramic material at a temperature lower than the melting point;
s3, grinding the biscuit by a grinding machine: edging and flattening the four edges of the outline of the blank by using a diamond grinding wheel grinder, and carrying out rough grinding on the back surface to reduce the thickness;
s4, CNC inner cavity machining and cambered surface appearance machining: processing the curved surface, the inner height and the peripheral size of the inner cavity through CNC inner cavity processing; CNC arc surface appearance processing is mainly to process the outer arc surface of the mobile phone rear cover;
s5, fine grinding plane, annealing and laser cutting: after fine grinding correction of plane warpage, stress is eliminated through annealing treatment for larger stress deformation, laser cutting of the camera hole and the flash hole is carried out after rough polishing, and then the laser cut hole and the arc surface appearance are subjected to fine grinding by adopting an electroplated diamond grinding head;
s6, surface treatment: the method for forming the metal or compound coating with special performance on the surface of the workpiece through the PVD process, and then plating a layer of coating on the surface of the ceramic through the AF process, wherein the coating ensures that fingerprints are not easy to generate on the surface of the ceramic, and the wear resistance is good.
The raw materials are effectively mixed through the ball milling, the ceramic particles are abraded, the integrity of the dry pressing is improved, in the embodiment, preferably, the ceramic particles, the solvent and the dispersing agent in the S1 are mixed through the ball milling, the ceramic particles can be ground, the mixing can be realized, the ball milling adopts two-stage ball milling treatment, and the adhesive and the plasticizer are added into the raw materials after the grinding.
The processing of the dry pressed raw material is realized through sintering, so that gaps among ceramic particles can be automatically filled to form a whole plate, in the embodiment, preferably, the dry pressed sintering in the S2 presses the raw material into a compact green body with a certain shape, the green body is composed of a plurality of single ceramic particles before sintering, a plurality of air holes are formed in the green body, and the porosity is generally 40% -60%; when the solid biscuit is heated at high temperature, solid particles in the biscuit can undergo substance migration, the biscuit shrinks when reaching a certain temperature, the grain growth is large, air holes are eliminated, and finally the biscuit becomes a polycrystalline ceramic material at a temperature lower than the melting point.
In order to realize the sintering treatment of the mobile phone cover and effectively form the whole mobile phone cover through the sintering treatment of different temperature sections, in this embodiment, preferably, the sintering in the S2 is respectively carried out in several temperature sections, namely, the sintering is required to be carried out for 1-4 hours at 600-650 ℃, the sintering is carried out for a period of time at 1350-1500 ℃, and then the ceramic shell is further obtained after being put into an annealing furnace.
The surface treatment is performed on the mobile phone cover through a plurality of processes, the optimality of the surface of the mobile phone cover is improved, then the detection treatment is performed, in this embodiment, preferably, the PVD process of the surface treatment in S6 adopts evaporation plating or sputtering plating, logo or color film is plated on the ceramic cover plate, and the AF treatment uses an evaporation manner, and after the surface treatment, microcrack detection, profile tolerance, overall warpage, section warpage and thickness detection are performed on the ceramic cover plate.
The working principle and the using flow of the invention are as follows:
in the first step, ceramic particles, a solvent and a dispersing agent are mixed: fully mixing ceramic particles, a solvent and a dispersing agent, and slowly stirring through ball milling during mixing, so as to fully mix;
step two, dry-pressing sintering the mixed raw materials: the mixed raw materials are pressed into a compact green body with a certain shape under the action of pressure, then when the solid green body is heated at a high temperature, solid particles in the green body can undergo substance migration, the green body is contracted when reaching a certain temperature, the growth of crystal grains appears, and with the elimination of air holes, the green body becomes a polycrystalline ceramic material at a temperature lower than the melting point;
thirdly, grinding the biscuit by a grinding machine: edging and flattening the four edges of the outline of the blank by using a diamond grinding wheel grinder, and carrying out rough grinding on the back surface to reduce the thickness;
fourthly, CNC inner cavity machining and cambered surface appearance machining: processing the curved surface, the inner height and the peripheral size of the inner cavity through CNC inner cavity processing; CNC arc surface appearance processing is mainly to process the outer arc surface of the mobile phone rear cover;
fifth step, fine grinding plane, annealing and laser cutting: after fine grinding correction of plane warpage, stress is eliminated through annealing treatment for larger stress deformation, laser cutting of the camera hole and the flash hole is carried out after rough polishing, and then the laser cut hole and the arc surface appearance are subjected to fine grinding by adopting an electroplated diamond grinding head;
sixth, surface treatment: the method for forming the metal or compound coating with special performance on the surface of the workpiece through the PVD process, and then plating a layer of coating on the surface of the ceramic through the AF process, wherein the coating ensures that fingerprints are not easy to generate on the surface of the ceramic, and the wear resistance is good.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A ceramic mobile phone cover, which is characterized in that: the preparation method comprises the following raw materials:
48-65% of ceramic particles, 3.2-5% of adhesive, 0.1-1% of dispersing agent, 1.2-2.6% of plasticizer and 30.1-45.1% of solvent;
still more particularly, the ceramic particles comprise 50.3-58.2% of clay, 20.2-40.5% of white zirconia, 2-6% of yttrium oxide, 0.5-7% of aluminum oxide and 0.5-13% of colorant;
the colorant adopts a plurality of ores with different colors, namely the ores with different colors are respectively crushed, then the colors are extracted through elutriation, clarification, flying and falling, namely the elutriation is to elutriate impurities with water, clarification is a clarification and precipitation process, flying is to skim a layer of pigment floating on the upper surface, so-called taking bleaching, and falling is to stir up the sinking part again for reprecipitation;
the ceramic particles are prepared by mixing ceramic mud, zirconia, yttria, alumina and a colorant in proportion, and then firing the ceramic mud, zirconia, yttria, alumina and the colorant into ceramic particles.
2. The ceramic mobile phone cover according to claim 1, wherein: the adhesive comprises a sizing material, a solvent, a curing agent, a toughening agent, a preservative and an auxiliary component of a defoaming agent, wherein the sizing material comprises animal glue, synthetic resin and one or more of epoxy resin, phenolic resin, polyvinyl acetal, perchloroethylene resin, chloroprene rubber and nitrile rubber.
3. The ceramic mobile phone cover according to claim 1, wherein: the dispersing agent comprises an inorganic dispersing agent and an organic dispersing agent, wherein the inorganic dispersing agent comprises silicate and alkali metal phosphate, the silicate is water glass, the alkali metal phosphate is sodium tripolyphosphate, sodium hexametaphosphate and sodium pyrophosphate, and the organic dispersing agent comprises one or more of triethylhexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives, polyacrylamide, guar gum and fatty acid polyethylene glycol ester.
4. The ceramic mobile phone cover according to claim 1, wherein: the plasticizer is polyethylene glycol or dibutyl phthalate, and the solvent is alcohol, including one or more of n-butanol, methyl ethyl ketone, toluene, ethanol, methyl ethyl ketone and trichloroethylene, or mixture.
5. The ceramic mobile phone cover according to claim 1, wherein: the natural ore adopted by the colorant comprises malachite, turquoise, cinnabar, copper blue ore, celadon, realgar, cinnabar, ocher, clam powder, kaolin, zinc white, titanium white, lithopone and gold, and also comprises carbon black, mainly carbide of plants.
6. A preparation method of a ceramic mobile phone cover is characterized in that: the method comprises the following steps:
s1, mixing ceramic particles, a solvent and a dispersing agent: fully mixing ceramic particles, a solvent and a dispersing agent, and slowly stirring through ball milling during mixing, so as to fully mix;
s2, carrying out dry-pressing sintering on the mixed raw materials: the mixed raw materials are pressed into a compact green body with a certain shape under the action of pressure, then when the solid green body is heated at a high temperature, solid particles in the green body can undergo substance migration, the green body is contracted when reaching a certain temperature, the growth of crystal grains appears, and with the elimination of air holes, the green body becomes a polycrystalline ceramic material at a temperature lower than the melting point;
s3, grinding the biscuit by a grinding machine: edging and flattening the four edges of the outline of the blank by using a diamond grinding wheel grinder, and carrying out rough grinding on the back surface to reduce the thickness;
s4, CNC inner cavity machining and cambered surface appearance machining: processing the curved surface, the inner height and the peripheral size of the inner cavity through CNC inner cavity processing; CNC arc surface appearance processing is mainly to process the outer arc surface of the mobile phone rear cover;
s5, fine grinding plane, annealing and laser cutting: after fine grinding correction of plane warpage, stress is eliminated through annealing treatment for larger stress deformation, laser cutting of the camera hole and the flash hole is carried out after rough polishing, and then the laser cut hole and the arc surface appearance are subjected to fine grinding by adopting an electroplated diamond grinding head;
s6, surface treatment: the method for forming the metal or compound coating with special performance on the surface of the workpiece through the PVD process, and then plating a layer of coating on the surface of the ceramic through the AF process, wherein the coating ensures that fingerprints are not easy to generate on the surface of the ceramic, and the wear resistance is good.
7. The method for manufacturing the ceramic mobile phone cover according to claim 6, wherein: when the ceramic particles, the solvent and the dispersing agent in the S1 are mixed, ball milling and mixing are carried out through ball milling, so that the grinding of the ceramic particles can be realized, the mixing can also be realized, the ball milling adopts two-stage ball milling treatment, and the adhesive and the plasticizer are added into the raw materials after grinding.
8. The method for manufacturing the ceramic mobile phone cover according to claim 6, wherein: the dry pressing sintering in the step S2 presses the raw materials into a compact blank body with a certain shape, the blank body is composed of a plurality of single ceramic particles before sintering, a plurality of air holes are formed in the blank body, and the porosity is generally 40% -60%; when the solid biscuit is heated at high temperature, solid particles in the biscuit can undergo substance migration, the biscuit shrinks when reaching a certain temperature, the grain growth is large, air holes are eliminated, and finally the biscuit becomes a polycrystalline ceramic material at a temperature lower than the melting point.
9. The method for manufacturing the ceramic mobile phone cover according to claim 6, wherein: the sintering in S2 is respectively carried out at a plurality of temperature sections, namely, the sintering is carried out for 1-4 hours at 600-650 ℃, then the sintering is carried out for a period of time at 1350-1500 ℃, and then the ceramic shell is obtained after being put into an annealing furnace.
10. The method for manufacturing the ceramic mobile phone cover according to claim 6, wherein: the PVD process of the surface treatment in S6 adopts evaporation plating or sputtering plating, logo or color film is plated on the ceramic cover plate, the AF treatment adopts an evaporation plating mode, and microcrack detection, profile tolerance, overall warping degree, section warping degree and thickness detection are carried out on the ceramic cover plate after the surface treatment.
CN202310460651.8A 2023-04-25 2023-04-25 Ceramic mobile phone cover and preparation method thereof Pending CN116675515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310460651.8A CN116675515A (en) 2023-04-25 2023-04-25 Ceramic mobile phone cover and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310460651.8A CN116675515A (en) 2023-04-25 2023-04-25 Ceramic mobile phone cover and preparation method thereof

Publications (1)

Publication Number Publication Date
CN116675515A true CN116675515A (en) 2023-09-01

Family

ID=87787993

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310460651.8A Pending CN116675515A (en) 2023-04-25 2023-04-25 Ceramic mobile phone cover and preparation method thereof

Country Status (1)

Country Link
CN (1) CN116675515A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101844920A (en) * 2010-05-13 2010-09-29 清华大学 Preparation method of colored zirconia ceramics
CN104003714A (en) * 2014-01-26 2014-08-27 湖北国瓷科技有限公司 Method for preparing cellphone parts in various colors with zirconia ceramics
CN108012011A (en) * 2017-11-16 2018-05-08 盐城天顺机械科技有限公司 The manufacture craft of ceramic mobile phone protective shell
CN108484162A (en) * 2018-05-09 2018-09-04 陕西科技大学 The preparation method of yellow zirconium oxide ceramic
KR101940111B1 (en) * 2017-08-21 2019-01-18 주식회사 부일신소재 Method for Manufacturing Bicolored Zirconia Ceramics
CN110636158A (en) * 2019-09-12 2019-12-31 华为技术有限公司 Middle frame, rear cover, preparation method of middle frame and rear cover and electronic equipment
KR102172619B1 (en) * 2019-05-29 2020-11-02 한국세라믹기술원 Smart phone cover and manufacturing method of the same
CN112608080A (en) * 2020-12-08 2021-04-06 广东省福美材料科学技术有限公司 Color active mixed material and preparation method and application thereof
WO2023279800A1 (en) * 2021-07-09 2023-01-12 Oppo广东移动通信有限公司 Housing, preparation method therefor, and electronic device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101844920A (en) * 2010-05-13 2010-09-29 清华大学 Preparation method of colored zirconia ceramics
CN104003714A (en) * 2014-01-26 2014-08-27 湖北国瓷科技有限公司 Method for preparing cellphone parts in various colors with zirconia ceramics
KR101940111B1 (en) * 2017-08-21 2019-01-18 주식회사 부일신소재 Method for Manufacturing Bicolored Zirconia Ceramics
CN108012011A (en) * 2017-11-16 2018-05-08 盐城天顺机械科技有限公司 The manufacture craft of ceramic mobile phone protective shell
CN108484162A (en) * 2018-05-09 2018-09-04 陕西科技大学 The preparation method of yellow zirconium oxide ceramic
KR102172619B1 (en) * 2019-05-29 2020-11-02 한국세라믹기술원 Smart phone cover and manufacturing method of the same
CN110636158A (en) * 2019-09-12 2019-12-31 华为技术有限公司 Middle frame, rear cover, preparation method of middle frame and rear cover and electronic equipment
CN112608080A (en) * 2020-12-08 2021-04-06 广东省福美材料科学技术有限公司 Color active mixed material and preparation method and application thereof
WO2023279800A1 (en) * 2021-07-09 2023-01-12 Oppo广东移动通信有限公司 Housing, preparation method therefor, and electronic device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
周铁宁: "《画余画论》", 31 December 2015, 天津人民美术出版社, pages: 64 *

Similar Documents

Publication Publication Date Title
CN107586107A (en) A kind of preparation method of Buddhist public affairs pottery handicraft
CN113400442B (en) Method for manufacturing glazed tile by using solid powder
CN108911742B (en) Sagger high-corrosion-resistance coating and using method thereof
CN107571673A (en) A kind of preparation method of Buddhist public affairs pottery handicraft
CN105837206A (en) Manufacturing method of zirconia ceramic large-scale thin-wall device
CN107586110A (en) A kind of preparation method of Buddhist public affairs pottery handicraft
CN107573016A (en) A kind of preparation method of Buddhist public affairs pottery handicraft
CN115403410B (en) Digital printing glazed tile with mold stereoscopic effect and preparation method thereof
CN107602066A (en) A kind of preparation method of Buddhist public affairs pottery handicraft
CN109081591A (en) The art pottery and preparation method thereof with regular contracting glaze texture
CN114956565A (en) Transparent glaze and preparation method of domestic ceramic product
CN103145455A (en) Glazed ceramic plated with metal patterns and its mold and manufacturing technology
CN108715539B (en) Brown glaze heat-resistant ceramic pot and preparation method thereof
CN114773033A (en) Domestic ceramic product of transparent glaze and preparation method thereof
CN116675515A (en) Ceramic mobile phone cover and preparation method thereof
CN111559905B (en) High-strength, high-transparency and high-flatness ceramic sheet
WO2012023805A2 (en) Method for producing a zirconia ceramic case having a logo for a portable electronic device
CN105604490B (en) A kind of preparation method of high-performance diamond-impregnated bit carcass and drill bit
CN111499367A (en) Taishan jade porcelain and preparation method thereof
CN108503339A (en) A kind of production method that good fortune descends gourd-shaped bottle pottery craftwork over the sky
CN113307614A (en) Manufacturing method of underglaze K-gold ceramic tile
CN108892505A (en) A kind of refractory ceramics cutter and preparation method thereof
CN115536362B (en) Mirror polished large-specification ultrathin ceramic rock plate and preparation method thereof
CN107586109A (en) A kind of preparation method of Buddhist public affairs pottery handicraft
CN107586106A (en) A kind of preparation method of Buddhist public affairs pottery handicraft

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination