CN107382311A - A kind of preparation method of ceramic component - Google Patents

A kind of preparation method of ceramic component Download PDF

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Publication number
CN107382311A
CN107382311A CN201710498936.5A CN201710498936A CN107382311A CN 107382311 A CN107382311 A CN 107382311A CN 201710498936 A CN201710498936 A CN 201710498936A CN 107382311 A CN107382311 A CN 107382311A
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China
Prior art keywords
ceramic component
preparation
base substrate
steps
component according
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CN201710498936.5A
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Chinese (zh)
Inventor
齐会龙
俞胜平
张法亮
高洪伟
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Goertek Inc
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Goertek Inc
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Priority to CN201710498936.5A priority Critical patent/CN107382311A/en
Publication of CN107382311A publication Critical patent/CN107382311A/en
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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
    • C04B35/48—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/26—Producing shaped prefabricated articles from the material by slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to soak into or pass through the walls of the mould; Moulds therefor ; specially for manufacturing articles starting from a ceramic slip; Moulds therefor
    • B28B1/261—Moulds therefor
    • B28B1/262—Mould materials; Manufacture of moulds or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/08—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
    • B28B11/0845—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads for smoothing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • 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
    • C04B35/622—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
    • C04B35/63496—Bituminous materials, e.g. tar, pitch
    • 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
    • C04B35/622—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
    • C04B35/638—Removal thereof
    • 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
    • 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
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • 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
    • C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
    • C04B2235/661—Multi-step sintering

Abstract

The invention discloses a kind of preparation method of ceramic component.The preparation method includes：S1, binding agent is added in powder material, and carry out banburying granulation, to form particulate material；S2, the particulate material obtained in S1 steps is molded, to form base substrate；S3, by the base substrate obtained in S2 carry out ungrease treatment, wherein, ungrease treatment includes：Base substrate is placed into solvent first and carries out solvent degreasing；Then the base substrate after solvent degreasing is subjected to thermal debinding；S4, the base substrate for obtaining S3 steps carry out hot pressed sintering, to form ceramic component.

Description

A kind of preparation method of ceramic component
Technical field
The present invention relates to field of ceramic preparation technology, more particularly, to a kind of preparation method of ceramic component.
Background technology
Cell phone rear cover falls, radiated, the composite request of weight, aesthetics to resistance to requiring to include for material.This requires hand Machine rear cover material possesses the features such as high intensity, heat-resistant antifriction are good, electromagnetic wave shielding is good, dimensionally stable, good outward appearance.
Cell phone rear cover material experienced the application history from engineering plastics to metal, be the shortcomings that these materials hardness it is low, It is easy to wear, easy to aging, yielding, easy to scratch, be thermo-labile etc..Recently, ceramic material receives much concern as cell phone rear cover, Yin Qiwen Such as the beautiful texture of profit, wear-resistant, scratch resistant, it is non-discolouring, without the excellent performance of electromagnetic shielding, and favored by consumer.
The problem of maximum that ceramic mobile phone bonnet faces is that fragility is big, resistance to falling property is poor.Stabilized with yttrium oxide tetragonal zircite (Y- TZP) because its transformation toughening mechanism to act on performance in terms of high-fracture toughness excellent.
In terms of material performance improvement itself, generally using the method being modified to Zirconium powder, and in certain journey The fracture toughness of material is improved on degree, it was reported that the Fracture Toughness of Y-TZP materials is up to 6Mpam1/2, intensity is up to 1000Mpa.It is more using degreasing, normal pressure-sintered is carried out after injection moulding however, in the prior art, it is surface-treated afterwards Or black.
The problem of cell phone rear cover of normal pressure-sintered preparation is present be：Sintering driving force is relied solely under normal pressure-sintered technique, Stomata is caused not exclude thoroughly.
In addition, normal pressure-sintered sintering temperature is higher, sintering time is longer, causes abnormal grain growth, to material fine grain Change and intensity adversely affects.
In addition, being not enough to improve the consistency and the reduction porosity of ceramic material by optimizing sintering curre, subsequently adding In work and grinding and polishing process, it is very low still to easily cause product yield.
The content of the invention
It is an object of the present invention to provide a kind of new solution of the preparation method of ceramic component.
According to the first aspect of the invention, there is provided a kind of preparation method of ceramic component.The preparation method includes：
S1, binding agent is added in powder material, and carry out banburying granulation, to form particulate material；
S2, the particulate material obtained in S1 steps is molded, to form base substrate；
S3, by the base substrate obtained in S2 carry out ungrease treatment, wherein, the ungrease treatment includes：First by described in Base substrate, which is placed into solvent, carries out solvent degreasing；Then the base substrate after solvent degreasing is subjected to thermal debinding；
S4, the base substrate for obtaining S3 steps carry out hot pressed sintering, to form ceramic component.
Alternatively, in S4 steps, the temperature of the hot pressed sintering is 1200 DEG C -1350 DEG C, pressure 10-30MPa, is protected The pressure time is 10-45mins.
Alternatively, the powder material is at least one in common Zirconium powder and yttria-stabilized zirconia powder Kind.
Alternatively, the powder material is yttria-stabilized zirconia powder, wherein, the mol ratio of yittrium oxide and zirconium oxide Example is 3:97-8:92.
Alternatively, in S3 steps, solvent is chloroform, carbon tetrachloride, trichloro ethylene or third used by solvent degreasing Ketone.
Alternatively, the temperature of solvent degreasing is 35 DEG C -55 DEG C, and degreasing time is 6-24 hours.
Alternatively, in S3 steps, the temperature-rise period of thermal debinding includes three phases：First stage is by room temperature to 300 ℃；Second stage is by 300 DEG C to 500 DEG C；Phase III is 500 DEG C to 800 DEG C, and under the outlet temperature in each stage It is incubated.
Alternatively, also include carrying out the base substrate pre-burning after thermal debinding, the temperature of the pre-burning is 800 DEG C.
Alternatively, in S2 steps, using injection moulding, dry-pressing formed or flow casting molding, to form the base substrate.
Alternatively, in S2 steps, using injection molding method, to form the base substrate, wherein, injection temperature 50 DEG C -260 DEG C, injection pressure 60-160MPa, mould temperature is 35 DEG C -80 DEG C.
Alternatively, the granularity of the powder material is 0.1-0.7 μm.
Alternatively, in S1 steps, the binding agent includes the mixing of paraffin, high density polyethylene (HDPE) and stearic acid three Thing, wherein, the mass fraction of paraffin is 1-71%, and the mass fraction of high density polyethylene (HDPE) is 1%-45%, stearic quality Fraction is 1%-29%.
Alternatively, in S1 steps, the temperature that internally mix is granulated is 70-300 DEG C.
Alternatively, also include the powder material being dried before S1 steps, to exclude in the powder material The vapor of absorption.
Alternatively, also include being surface-treated the ceramic component after hot pressed sintering after S4 steps, with To the ceramic component with mirror effect.
It was found by the inventors of the present invention that in the prior art, entered in existing ceramic component using normal atmosphere sintering method Row blank sintering, stomata is caused not exclude thoroughly, and sintering time is grown, and sintering temperature is high, and the yields of product is low.Cause This, the technical assignment to be realized of the present invention or technical problem to be solved be it is that those skilled in the art never expect or Person it is not expected that, therefore the present invention is a kind of new technical scheme.
By referring to the drawings to the present invention exemplary embodiment detailed description, further feature of the invention and its Advantage will be made apparent from.
Brief description of the drawings
It is combined in the description and the accompanying drawing of a part for constitution instruction shows embodiments of the invention, and even It is used for the principle for explaining the present invention together with its explanation.
Fig. 1 is the flow chart of the preparation method of ceramic component according to an embodiment of the invention.
Fig. 2 is the electron microscope of ceramic component obtained according to one embodiment of present invention.
Embodiment
The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should be noted that：Unless have in addition Body illustrates that the unlimited system of part and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally The scope of invention.
The description only actually at least one exemplary embodiment is illustrative to be never used as to the present invention below And its application or any restrictions that use.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable In the case of, the technology, method and apparatus should be considered as part for specification.
In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.
According to one embodiment of present invention, there is provided a kind of preparation method of ceramic component.The preparation method is used to make Make bonnet, center of mobile phone or computer etc., it may also be used for make Watch dail plate, cutter etc..
This method includes：
S1, binding agent is added in powder material, and carry out banburying granulation, to form particulate material.In this step, pass through Binding agent is added into powder material, powder material is obtained plasticity, in order to be molded.Wherein, binding agent includes paraffin, highly dense Spend at least one of polyethylene and stearic acid.Binding agent can be the mixture of above-mentioned one or more kinds of materials.
By internal mixing pass, powder material and binding agent are sufficiently mixed, fully mixed and obtain plasticity.
For example, in this step, powder material and binding agent are added in banburying Granulation Equipments.The rotating speed of banburying is in 1- 100r/min, rotating speed is granulated between 20-400r/min.Finally give the particulate material of particle size uniformity.The size of particulate material Usually several millimeters.Particulate material is easy to be added in former.For example, if former fills for injection moulding Put.If the powder material after addition bonding agent is directly added into Coinjection molding apparatus, due to the powder after addition binding agent The viscosity of body raw material is big, so Coinjection molding apparatus can be blocked.
In embodiments of the present invention, it is granulated by banburying, forms granular powder material.The adding speed of particulate material is Controllable.The adding speed that user can set granular powder material according to being actually needed, so as to ensure former Continuous work, avoids the occurrence of clogging.
Preferably, binding agent includes the mixture of paraffin, high density polyethylene (HDPE) and stearic acid three, wherein, the matter of paraffin Amount fraction is 1-71%, and the mass fraction of high density polyethylene (HDPE) is 1%-45%, and stearic mass fraction is 1%-29%.Should Binding agent has the characteristics of adhesive strength is high, and dosage is few when banburying is granulated.Those skilled in the art can be according to being actually needed The proportioning of three kinds of medicaments is selected, other medicaments can also be added on the basis of three.
Binding agent forms slurry after being added in powder material.The ratio of binding agent is higher, then the mobility of slurry is stronger, So when being granulated, particulate material is not easy to shape；The ratio of binding agent is lower, then the mobility of slurry is poorer, when being granulated, makes It is bigger to obtain the pressure of banburying Granulation Equipments, and the volume difference of particulate material is big.Preferably, the quality of binding agent accounts for the total of slurry The 20-72% of quality.Within the range, the mobility and good shape retention of slurry.
Those skilled in the art can be according to the dosage for being actually needed selection binding agent, to form regular equably particle Material.
Alternatively, powder material is at least one of common Zirconium powder and yttria-stabilized zirconia powder.It is general Logical Zirconium powder is pure zirconia material.Yttria-stabilized zirconia powder is changed by the doping of yittrium oxide to zirconium oxide Property processing, to improve the fracture toughness of material.Ceramic component made from both materials or the mixture of the two, is respectively provided with good Good fracture toughness, is not easy to break.
Preferably, powder material is yttria-stabilized zirconia powder, wherein, the molar ratio of yittrium oxide and zirconium oxide is 3:97-8:92.The yttria-stabilized zirconia of the proportion, t-m (cubic crystal orientation-monocline crystal orientation) phase transition temperature is low, sintering Time is short, and ceramic component has more excellent fracture toughness after sintering.
In addition, in hot pressed sintering, fine crystal grain is easily formed.
Preferably, the granularity of powder material is 0.1-0.7 μm.Granularity is more tiny, and then in hot pressed sintering, phase transition temperature is more Low, sintering time is shorter, and sintering effect is better.In the particle size range, the sintering temperature of hot pressed sintering is low, sintering velocity It hurry up.
Granulation of the temperature that banburying is granulated to slurry has a significant impact.The mobility of the more high then binding agent of temperature is stronger, shape Into particulate material it is uneven, the sphericity of particle is poor；The mobility of the more low then binding agent of temperature is poorer so that the hardness of slurry is got over Greatly, the pressure needed when banburying is granulated is big, and particulate material is not of uniform size.
Preferably, in this step, the temperature that banburying is granulated is 70-300 DEG C.In the temperature range, the work of binding agent Property is best so that the plasticity of slurry is good, and slurry easily forms particulate material, and the sphericity of particulate material is good.
After the cooling period, particulate material shapes, in case being added in forming step.
Preferably, also include powder material being dried before S1 steps, to exclude the water adsorbed in powder material Steam.When banburying is granulated, the vapor adsorbed in powder material can reduce the viscosity of powder material, and make the modeling of powder material Property reduce, cause banburying be granulated after powder material not easy-formation and conformal.
By drying steps, the vapor adsorbed in powder material can be effectively excluded, in order to base in subsequent step The shaping of body and conformal.
For example, powder material is dried in drying box.Drying temperature is 120 DEG C, and drying time is 6 hours.So The vapor adsorbed in powder material can be effectively excluded, avoids causing negative effect in subsequent handling.
S2, the particulate material obtained in S1 steps is molded, to form base substrate.In this step, particulate material is added Into former, to form the base substrate for setting shape.
Alternatively, in S2 steps, using injection moulding, dry-pressing formed or flow casting molding, to form base substrate.This is several Forming method can form the base substrate of setting shape.
Particulate material is added in injection device by injection moulding, is extruded through injection, to form setting shape in a mold Dense green.
It is dry-pressing formed that particulate material is stirred into slurry, filled therewith is entered in die cavity, pressed so that slurry turns into Dense green.
Flow casting molding is that slurry flows down from container, is scraped by scraper with certain thickness coated in special base band, through dry The coating materials as green tape is peeled after dry, solidification from base band, then green tape is punched according to the size and dimension of finished product, The working process such as laminated, is made dense green to be sintered.
The shaping speed of injection molding method is fast, suitable for extensive, mass continuous production.
Preferably, in S2 steps, using injection moulding, to form base substrate.Wherein, injection temperature is 50 DEG C -260 DEG C. At such a temperature, the mobility of slurry and plasticity are moderate, can form the base substrate of setting shape.Injection pressure is 60- 160MPa.The injection pressure can effectively drive the bubble in slurry away, and the base substrate densification of formation, defect are few.The mould of shaping The mould temperature of tool is 35 DEG C -80 DEG C.Under the mould temperature, it both can guarantee that the slurry being injected into die cavity can quickly fill with die cavity, and can Slurry is set quickly to obtain hardness and be molded.
S3, by the base substrate obtained in S2 carry out ungrease treatment.The purpose of ungrease treatment is by binding agent and base substrate Other organic matters remove, to avoid occurring stomata etc. in sintering.Wherein, ungrease treatment includes：Base substrate is placed into first molten Solvent degreasing is carried out in agent；Then the base substrate after solvent degreasing is subjected to thermal debinding.
The base substrate formed in S2 steps, after demoulding, it is placed into solvent.Solvent degreasing can be by the solubility in base substrate Composition effectively removes dissolving, and is internally formed the hole of connection in base substrate, to reduce the time of follow-up thermal debinding.
Alternatively, the solvent used in solvent degreasing is chloroform, carbon tetrachloride, trichloro ethylene or acetone.This is several organic Solvent is respectively provided with good degreasing effect.
The temperature of solvent degreasing is higher, then the activity of solvent is stronger, and degreasing speed is faster, but solvent is easier to volatilize；It is molten The temperature of agent degreasing is lower, then degreasing speed is slower.
Preferably, the temperature of solvent degreasing is 35 DEG C -55 DEG C, and degreasing time is 6-24 hours.Under the temperature conditionss, glue The knot soluble component such as agent and other organic matters can be more effectively removed.
Base substrate is after solvent degreasing, then is thoroughly dried；It is then placed into debinding furnace and carries out thermal debinding.At high temperature, base Binding agent and other organic matters in body etc. are substantially completely removed.In addition, during thermal debinding, base substrate obtains hardness, to protect Hold the shape of setting.
Stationary temperature can be used to carry out degreasing in thermal debinding.For example, the temperature of thermal debinding is 600-800 DEG C.So And at a constant temperature, because regulating the speed for base substrate is slow, therefore easily there is the deformation even phenomenon of cracking.Therefore, de- During fat, the programming rate of debinding furnace should match with regulating the speed for base substrate.
Preferably, in S3 steps, thermal debinding is by the way of progressively heating up.For example, the temperature-rise period of thermal debinding includes Three phases：First stage is to 300 DEG C by room temperature；Second stage is by 300 DEG C to 500 DEG C；Phase III be 500 DEG C extremely 800℃.And it is incubated under the outlet temperature in each stage.Outlet temperature is the maximum temperature of each stage heating.I.e. First stage is incubated in 300 DEG C, second stage in 500 DEG C, phase III at 800 DEG C.
The thickness of base substrate is bigger, then base substrate is regulated the speed slower, it is necessary to which the time of insulation is longer；The thickness of base substrate is smaller, Then the speed of base substrate adjustment is faster, it is necessary to which the time of insulation is shorter.Those skilled in the art can be set respectively according to being actually needed The soaking time in individual stage.
By stage being heated up, the internal adjustment speed of base substrate can be matched preferably with programming rate, so as to Reduce during thermal debinding, base substrate is cracking and deforms.
In addition, in order that base substrate obtains the intensity of setting, to facilitate follow-up hot pressed sintering process.After the thermal debinding also Including carrying out pre-burning to base substrate.Preferably, calcined temperature is 800 DEG C.For example, when phase III temperature is increased to 800 DEG C, Extend soaking time, to carry out pre-burning to base substrate, so that base substrate obtains the intensity of setting.
In this way, thermal debinding and pre-burning are carried out in same equipment, can so be prevented in transhipment base substrate process In, base substrate is damaged because colliding or extruding.
After degreasing terminates, base substrate is cooled, subsequently into hot pressed sintering process.
S4, the base substrate for obtaining S3 steps carry out hot pressed sintering, to form ceramic component., first, will in hot pressed sintering Dry base substrate is placed into mould.The mould can either be extruded base substrate, and and can enough conducts heat, so that base substrate is carried out Sintering.Preferably, mould is made by graphite.Graphite has good heat conductivility.
Then, mould heats to base substrate in pressurization, makes shaping and sintering while completes.
In hot pressed sintering, heating and pressurization are carried out simultaneously.Base substrate is in hot plastic state.The deformation resistance of base substrate is small, Contribute to the contact diffusion of particle, flow the progress of mass transport process.So, base substrate is easy to Plastic Flow and densification.
In addition, sintering driving force and the pressure of mould cause the bubble in base substrate to be easily excluded, so as to reduce ceramics The defects of product.
In addition, the mode of hot pressed sintering reduces sintering temperature, sintering time is shortened, thus inhibits the exception of crystal grain Grow up, so as to form fine and closely woven crystal grain.
In addition, the mechanical performance of the ceramic component obtained through hot pressed sintering, chemical property and electric property are good.
Preferably, in S4 steps, the temperature of hot pressed sintering is 1200 DEG C -1350 DEG C, pressure 10-30MPa, during pressurize Between be 10-45mins.Under the conditions of the hot pressed sintering, the sintering velocity of base substrate is fast, and can obtain the sintered body of densification.System The crystal grain of the ceramic component obtained is fine and closely woven, and fracture toughness is high.
Preferably, also include being surface-treated the ceramic component after hot pressed sintering after S4 steps, to be had There is the ceramic component of mirror effect.
For example, ceramic component is machined and mirror finish processing so that the surface of ceramic reaches minute surface Effect.The machined yield with after polishing of ceramic component prepared by the preparation method, than using normal pressure-sintered The yield for the product that preparation method obtains significantly improves.
The Fracture Toughness for the ceramic that indentation method tests to obtain is used as 5.5-6.4MPam1/2.The numeric ratio is normal The product that pressure sintering method is prepared significantly improves.
Fig. 2 is the scanning electron microscope (SEM) photograph of ceramic component according to an embodiment of the invention.
As shown in Fig. 2 the crystallite dimension for the ceramic component that the preparation method obtains is in below 1um, homogeneous grain size, and And intercrystalline is tightly combined.
In battery of tests, the ceramic component sample after 100 polishings is chosen, carries out drop test.In 0.8m high-altitudes certainly By dropping on cement flooring.After tested, no damage occurred for 100 products.
According to another embodiment of the invention, there is provided a kind of ceramic component.The ceramic component is provided by the present invention Preparation method is prepared.The ceramic component has the characteristics of high fracture toughness, high yield rate.
Preferably, the density of ceramic component is more than or equal to 6.08g/cm3.The consistency of the ceramic component is high.
Preferably, the fracture toughness of ceramic component is 5.5-6.4MPam1/2.The ceramic component fracture toughness is high, does not allow Easily broken.
Although some specific embodiments of the present invention are described in detail by example, the skill of this area Art personnel it should be understood that example above merely to illustrating, the scope being not intended to be limiting of the invention.The skill of this area Art personnel to above example it should be understood that can modify without departing from the scope and spirit of the present invention.This hair Bright scope is defined by the following claims.

Claims (15)

  1. A kind of 1. preparation method of ceramic component, it is characterised in that including：
    S1, binding agent is added in powder material, and carry out banburying granulation, to form particulate material；
    S2, the particulate material obtained in S1 steps is molded, to form base substrate；
    S3, by the base substrate obtained in S2 carry out ungrease treatment, wherein, the ungrease treatment includes：First by the base substrate It is placed into solvent and carries out solvent degreasing；Then the base substrate after solvent degreasing is subjected to thermal debinding；
    S4, the base substrate for obtaining S3 steps carry out hot pressed sintering, to form ceramic component.
  2. 2. the preparation method of ceramic component according to claim 1, it is characterised in that in S4 steps, the hot pressing is burnt The temperature of knot is 1200 DEG C -1350 DEG C, pressure 10-30MPa, dwell time 10-45mins.
  3. 3. the preparation method of ceramic component according to claim 1, it is characterised in that the powder material is common oxidation At least one of zirconium powder body and yttria-stabilized zirconia powder.
  4. 4. the preparation method of ceramic component according to claim 1, it is characterised in that the powder material is that yittrium oxide is steady Determine Zirconium powder, wherein, the molar ratio of yittrium oxide and zirconium oxide is 3:97-8:92.
  5. 5. the preparation method of ceramic component according to claim 1, it is characterised in that in S3 steps, solvent degreasing institute The solvent used is chloroform, carbon tetrachloride, trichloro ethylene or acetone.
  6. 6. the preparation method of ceramic component according to claim 5, it is characterised in that the temperature of solvent degreasing be 35 DEG C- 55 DEG C, degreasing time is 6-24 hours.
  7. 7. the preparation method of ceramic component according to claim 1, it is characterised in that in S3 steps, the liter of thermal debinding Warm process includes three phases：First stage is to 300 DEG C by room temperature；Second stage is by 300 DEG C to 500 DEG C；Phase III For 500 DEG C to 800 DEG C, and it is incubated under the outlet temperature in each stage.
  8. 8. the preparation method of ceramic component according to claim 7, it is characterised in that also include after thermal debinding to described Base substrate carries out pre-burning, and the temperature of the pre-burning is 800 DEG C.
  9. 9. the preparation method of ceramic component according to claim 1, it is characterised in that in S2 steps, using being injected into Type, dry-pressing formed or flow casting molding, to form the base substrate.
  10. 10. the preparation method of ceramic component according to claim 1, it is characterised in that in S2 steps, using being injected into The method of type, to form the base substrate, wherein, injection temperature is 50 DEG C -260 DEG C, injection pressure 60-160MPa, and mould temperature is 35℃-80℃。
  11. 11. the preparation method of ceramic component according to claim 1, it is characterised in that the granularity of the powder material is 0.1-0.7μm。
  12. 12. the preparation method of ceramic component according to claim 1, it is characterised in that in S1 steps, the binding agent Include the mixture of paraffin, high density polyethylene (HDPE) and stearic acid three, wherein, the mass fraction of paraffin is 1-71%, high density The mass fraction of polyethylene is 1%-45%, and stearic mass fraction is 1%-29%.
  13. 13. the preparation method of ceramic component according to claim 1, it is characterised in that in S1 steps, what internally mix was granulated Temperature is 70-300 DEG C.
  14. 14. the preparation method of ceramic component according to claim 1, it is characterised in that also including before S1 steps will The powder material is dried, to exclude the vapor adsorbed in the powder material.
  15. 15. the preparation method of ceramic component according to claim 1, it is characterised in that after S4 steps also include pair The ceramic component after hot pressed sintering is surface-treated, to obtain the ceramic component with mirror effect.
CN201710498936.5A 2017-06-27 2017-06-27 A kind of preparation method of ceramic component Pending CN107382311A (en)

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CN110282985A (en) * 2019-06-24 2019-09-27 西北工业大学 A kind of cosolvent auxiliary degreasing method of photocuring 3D printing aluminium oxide ceramics biscuit
CN112759414A (en) * 2020-12-25 2021-05-07 深圳市吉迩科技有限公司 Porous ceramic atomizing core, preparation method thereof and electronic cigarette

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CN103539448A (en) * 2013-10-09 2014-01-29 瑞声声学科技(深圳)有限公司 Piezoelectric ceramic material, piezoelectric ceramic component and preparation method and anti-aging method of piezoelectric ceramic
CN104068595A (en) * 2013-03-25 2014-10-01 华为技术有限公司 Ceramic shell structure member and preparation method thereof, and mobile phone
CN105541324A (en) * 2015-12-15 2016-05-04 东莞信柏结构陶瓷股份有限公司 Preparation method of mobile telephone shell

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CN1053784A (en) * 1991-03-23 1991-08-14 李冬绮 Far-infrared ceramic and manufacture method thereof
CN104068595A (en) * 2013-03-25 2014-10-01 华为技术有限公司 Ceramic shell structure member and preparation method thereof, and mobile phone
CN103539448A (en) * 2013-10-09 2014-01-29 瑞声声学科技(深圳)有限公司 Piezoelectric ceramic material, piezoelectric ceramic component and preparation method and anti-aging method of piezoelectric ceramic
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* Cited by examiner, † Cited by third party
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CN110282985A (en) * 2019-06-24 2019-09-27 西北工业大学 A kind of cosolvent auxiliary degreasing method of photocuring 3D printing aluminium oxide ceramics biscuit
CN112759414A (en) * 2020-12-25 2021-05-07 深圳市吉迩科技有限公司 Porous ceramic atomizing core, preparation method thereof and electronic cigarette

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