CN108840675A - A kind of preparation method of zirconia ceramics cell phone rear cover - Google Patents

A kind of preparation method of zirconia ceramics cell phone rear cover Download PDF

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CN108840675A
CN108840675A CN201810919934.3A CN201810919934A CN108840675A CN 108840675 A CN108840675 A CN 108840675A CN 201810919934 A CN201810919934 A CN 201810919934A CN 108840675 A CN108840675 A CN 108840675A
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powder
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rear cover
cell phone
preparation
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林劝雄
吴宇尧
傅华中
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Quanzhou Zhitong Lian Technology Development Co Ltd
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Quanzhou Zhitong Lian Technology Development Co Ltd
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Abstract

The invention discloses a kind of preparation methods of zirconia ceramics cell phone rear cover, include the following steps：Modified oxidized zirconium powder is uniformly mixed with yttrium oxide powder, obtains mixed-powder by step S1；Step S2, mixed-powder is dissolved in dehydrated alcohol, and ammonium polyacrylate is added, wet grinding 20 hours ~ 36 hours, is dried, and obtains pretreatment powder；Step S3, polyethylene glycol, isopropanol, zinc stearate are added into pretreatment powder, and ultrasonic wave dispersion obtains casting slurry；Casting slurry vacuum defoamation is obtained green compact through tape casting by step S4；Green compact are carried out three sections of heat treatments, then after shaped working process, obtain zirconia ceramics cell phone rear cover by step S5.The hardness and flexural strength of zirconia ceramics cell phone rear cover prepared by the present invention are big, and Resisting fractre ability is strong, and product is homogeneous, quality is stable, and preparation method is simple, and preparation process is easy to operate, are suitble to the large-scale promotion present invention.

Description

A kind of preparation method of zirconia ceramics cell phone rear cover
Technical field
The present invention relates to technical field of ceramic material, and in particular to a kind of preparation method of zirconia ceramics cell phone rear cover.
Background technique
Currently, the material of cell phone rear cover in the market is generally engineering plastics, metal, glass etc., though these materials can be full Sufficient performance requirement, but that there are still hardness is low, it is easy scratch, be thermo-labile, easy fracture the disadvantages of.With the prevalence of high price smart phone, People more value product quality, pursue beautiful cell phone rear cover exquisite, drop resistant is wear-resisting, quality sense is good.Zirconia ceramics is one The low shielding of kind, high-intensitive, wear-resistant, high temperature resistant, corrosion resistant novel Hi-tech ceramic material, intensity is high, and hardness is on 8.5 left sides The right side, it is close with sapphire hardness, and chemical stability is good.Therefore, it is got over zirconia ceramics material as the raw material of cell phone rear cover It is pursued and is liked by consumer to get over.
Chinese patent CN103951420A discloses a kind of ceramic manual casing and preparation method thereof, includes the following steps：It will Ceramic powder, organic functions auxiliary agent, solvent mixing, and carry out wet ball grinding be made can gel ceramic slurry, and carried out de-bubble； By by de-bubble can gel ceramic slurry be injected into preset die, using ultraviolet light cause complete gel process, obtain To ceramic manual casing green body；Moisturizing processing is carried out to gained green body again, and then is burnt into, to obtain the ceramic manual casing, wherein Organic functions auxiliary agent includes monomer, crosslinking agent and photoinitiator, and the solvent is deionized water, polyethylene glycol etc..The patent is adopted The method that photoinitiator and the gel forming using ultraviolet light-initiated idiosome are added in organic functions auxiliary agent, so that idiosome Stress distribution is relatively uniform in forming process, break resistance is good, but its intensity and toughness are bad.
Chinese patent CN104961461A discloses a kind of preparation method of zirconia ceramics cell phone rear cover, including：(1) it uses The powder of zirconium oxide in high purity of stabilized with yttrium oxide is configured to suspension by deionized water, and dispersion is added into the suspension Agent adds Al2O3, TiO2 and SiO2, dries after mixing, obtain mixing modified nano zirconium oxide powder；(2) step is taken (1) what is prepared mixes modified nano zirconium oxide powder, is dissolved in organic solvent, and dispersing agent, binder is added, will mix above Liquid is dispersed after being stirred, and obtains evenly dispersed casting slurry, will be cast after casting slurry filtering, vacuum defoamation Form a film band；(3) step (2) obtains casting films band is placed on punching block surface after dry, slice, carries out temperature after vacuum packaging sealing Equal static pressure, to obtain green compact；The green compact are subjected to dumping, then sinter potsherd into；(4) pottery for obtaining step (3) Tile obtains the zirconia ceramics cell phone rear cover after CNC processes shape, grinding wheel fine grinding, vibromill polishing.But the patent The intensity of the cell phone rear cover of preparation is preferable, but its break resistance is bad.
Summary of the invention
The present invention is in view of the above-mentioned problems, provide a kind of preparation method of zirconia ceramics cell phone rear cover.
The present invention solve the above problems used by technical solution be：A kind of preparation side of zirconia ceramics cell phone rear cover Method includes the following steps：
Modified oxidized zirconium powder is uniformly mixed with yttrium oxide powder, obtains mixed-powder by step S1；The modified oxidized zirconium powder The mixed weight ratio of end and yttrium oxide powder is 100:2~6；
The obtained mixed-powder of step S1 is dissolved in dehydrated alcohol by step S2, and ammonium polyacrylate, 15oC ~ 25oC wet process is added Grinding 20 hours ~ 36 hours obtains pretreatment powder after being dried；
Polyethylene glycol, isopropanol, zinc stearate, ultrasonic wave dispersion 5 are added into the pretreatment powder that step S2 is obtained by step S3 Minute ~ 15 minutes, obtain casting slurry；The polyethylene glycol, isopropanol, zinc stearate additional amount be respectively pre-process powder 4.5% ~ 9%, 0.5% ~ 1.5% and the 0.5% ~ 2.5% of weight；
Step S4, the casting slurry vacuum defoamation that step S3 is obtained obtain green compact through tape casting；
Step S5, the green compact that step S4 is obtained carry out three sections of heat treatments, then after shaped working process, obtain zirconia ceramics Cell phone rear cover.Wherein, yttrium oxide mixes the stability that zirconium oxide can be improved with modified zirconia, improves the intensity of cell phone rear cover And toughness；Ammonium polyacrylate is dispersing agent, it is first carried out ball milling mixing with Zirconium oxide powder, is further using mechanically modifying While improving zirconium oxide dispersibility, addition dispersing agent can reduce the agglomeration of mixed-powder；Ultrasonic disperse can not only mention Dispersibility of the high mixed-powder in dehydrated alcohol, localized hyperthermia, high pressure, strong shock wave and microjet that ultrasonic wave generates etc. is also The effect energy between zirconium oxide can be weakened, be effectively prevented reunion；Tape casting is adding for general zirconia ceramics cell phone rear cover Work technique, have the characteristics that it is inexpensive, facilitate it is succinct.
Further, in step S1, the mixed weight ratio of modified oxidized zirconium powder and yttrium oxide powder is 100:4.
Further, in step S1, the preparation method of modified zirconia includes：
Step a, Zirconium oxide powder is put into the vacuum oven of 50oC ~ 65oC, 2.5 hours ~ 4 hours dry, obtains drying Zirconium oxide powder；
The Zirconium oxide powder of the obtained drying of step a is added in dehydrated alcohol, and graphene is added by step b, ultrasonic disperse It after 15 minutes ~ 30 minutes, is put into ball mill, wet ball grinding 18 hours ~ 24 hours, is filtered, dried, obtained modified oxidized Zirconium.Wherein, zirconium oxide is acted on using mechanical force, chemically reacts its surface texture, form one layer of guarantor on surface Sheath makes Zirconia particles be easier to disperse；While physical modification, graphene is added, it is steady with the heat for improving cell phone rear cover Qualitative and break resistance；Ultrasonic disperse can weaken the effect energy between zirconium oxide, be effectively prevented reunion.
Further, in step a, the granularity of Zirconium oxide powder is 0.6 micron ~ 1.0 microns, and specific surface area is 7.36m2/g~8.15m2/g。
Further, in step b, the additional amount of graphene is the 1% ~ 5% of Zirconium oxide powder weight.
Further, in step b, dry is 8 hours ~ 11 hours dry under 120oC ~ 130oC.
Further, in step S2, the additional amount of ammonium polyacrylate is the 0.3% ~ 1.5% of mixed-powder weight.
Further, in step S3, polyethylene glycol, isopropanol, zinc stearate additional amount be respectively pre-process powder weight 6.5%, 1.0% and the 1.5% of amount.
Further, in step S5, three sections of heat treatments are：With the heating rate of 0.4oC/min ~ 0.8oC/min from room temperature It is warming up to 300oC ~ 400oC, keeps the temperature 6 hours ~ 12 hours, then be warming up to the heating rate of 1.0oC/min ~ 1.5oC/min 1050oC ~ 1250oC, constant temperature 0.5 ~ 2 hour, then with the heating rate of 1.5oC/min ~ 2.5oC/min be warming up to 1400oC ~ 1480oC, constant temperature 0.5 hour ~ 3 hours.
It is an advantage of the invention that：
1. being first modified processing, modification to zirconium oxide in the preparation method of zirconia ceramics cell phone rear cover of the invention On the one hand the dispersibility and dispersion stabilization of zirconium oxide can be improved, zirconium oxide on the other hand can be improved by adding graphene Thermal stability and break resistance；The intensity and toughness of cell phone rear cover can be improved in addition zirconium oxide；
2. the hardness and flexural strength of zirconia ceramics cell phone rear cover prepared by the present invention are big, Resisting fractre ability is strong, product quality Uniformly, quality is stablized, and preparation method is simple, and preparation process is easy to operate, is suitble to large-scale production.
Specific embodiment
The embodiment of the present invention is described in detail below, but what the present invention can be defined by the claims and cover Multitude of different ways is implemented.
Embodiment 1
A kind of preparation method of zirconia ceramics cell phone rear cover, is prepared via a method which：
Modified oxidized zirconium powder is uniformly mixed by step S1 with yttrium oxide powder, modified oxidized zirconium powder and yttrium oxide powder Mixed weight ratio is 100:2, obtain mixed-powder；
The obtained mixed-powder of step S1 is dissolved in dehydrated alcohol by step S2, and ammonium polyacrylate is added, and ammonium polyacrylate adds Enter 0.5%, 23oC wet grinding 36 hours that amount is mixed-powder weight, after being dried, obtains pretreatment powder；
Polyethylene glycol, isopropanol, zinc stearate, ultrasonic wave dispersion 5 are added into the pretreatment powder that step S2 is obtained by step S3 Minute, obtain casting slurry；Wherein, polyethylene glycol, isopropanol, zinc stearate additional amount be respectively to pre-process powder weight 4.5%, 0.8% and 2.0%；
Step S4, the casting slurry vacuum defoamation that step S3 is obtained obtain green compact through tape casting；
Step S5, the green compact that step S4 is obtained carry out three sections of heat treatments：With the heating rate of 0.4oC/min from room temperature to 320oC keeps the temperature 10 hours, then is warming up to 1050oC with the heating rate of 1.5oC/min, and constant temperature 1.0 hours, then with 2.3oC/ The heating rate of min is warming up to 1480oC, and constant temperature 1.0 hours, then after shaped working process, after obtaining zirconia ceramics mobile phone Lid.
Wherein, the preparation method of modified zirconia includes：
Step a, Zirconium oxide powder is put into the vacuum oven of 50oC, 3 hours dry, obtains dry Zirconium oxide powder； Wherein, the granularity of Zirconium oxide powder is 0.9 micron, specific surface area 7.36m2/g~8.02m2/g；
The Zirconium oxide powder of the obtained drying of step a is added in dehydrated alcohol, and graphene is added by step b, graphene Additional amount is the 1% of Zirconium oxide powder weight, and ultrasonic disperse after twenty minutes, is put into ball mill, wet ball grinding 22 hours, is passed through Filter, 130oC are 8 hours dry, obtain modified zirconia.
Embodiment 2
A kind of preparation method of zirconia ceramics cell phone rear cover, is prepared via a method which：
Modified oxidized zirconium powder is uniformly mixed by step S1 with yttrium oxide powder, modified oxidized zirconium powder and yttrium oxide powder Mixed weight ratio is 100:3, obtain mixed-powder；
The obtained mixed-powder of step S1 is dissolved in dehydrated alcohol by step S2, and ammonium polyacrylate is added, and ammonium polyacrylate adds Enter 1.5%, 15oC wet grinding 30 hours that amount is mixed-powder weight, after being dried, obtains pretreatment powder；
Polyethylene glycol, isopropanol, zinc stearate, ultrasonic wave dispersion 8 are added into the pretreatment powder that step S2 is obtained by step S3 Minute, obtain casting slurry；Wherein, polyethylene glycol, isopropanol, zinc stearate additional amount be respectively to pre-process powder weight 5.5%, 1.0% and 0.5%；
Step S5, the green compact that step S4 is obtained carry out three sections of heat treatments：With the heating rate of 0.5oC/min from room temperature to 400oC keeps the temperature 6 hours, then is warming up to 1100oC with the heating rate of 1.4oC/min, and constant temperature 1.5 hours, then with 1.5oC/min Heating rate be warming up to 1420oC, constant temperature 1.5 hours, then after shaped working process, obtain zirconia ceramics cell phone rear cover.
Wherein, the preparation method of modified zirconia includes：
Step a, Zirconium oxide powder is put into the vacuum oven of 55oC, 4 hours dry, obtains dry Zirconium oxide powder； Wherein, the granularity of Zirconium oxide powder is 0.6 micron, specific surface area 7.82m2/g~8.15m2/g；
The Zirconium oxide powder of the obtained drying of step a is added in dehydrated alcohol, and graphene is added by step b, graphene It after additional amount is the 2%, ultrasonic disperse 30 minutes of Zirconium oxide powder weight, is put into ball mill, wet ball grinding 18 hours, passes through Filter, 123oC are 10 hours dry, obtain modified zirconia.
Embodiment 3
A kind of preparation method of zirconia ceramics cell phone rear cover, is prepared via a method which：
Modified oxidized zirconium powder is uniformly mixed by step S1 with yttrium oxide powder, modified oxidized zirconium powder and yttrium oxide powder Mixed weight ratio is 100:5, obtain mixed-powder；
The obtained mixed-powder of step S1 is dissolved in dehydrated alcohol by step S2, and ammonium polyacrylate is added, and ammonium polyacrylate adds Enter 0.3%, 25oC wet grinding 25 hours that amount is mixed-powder weight, after being dried, obtains pretreatment powder；
Polyethylene glycol, isopropanol, zinc stearate, ultrasonic wave dispersion are added into the pretreatment powder that step S2 is obtained by step S3 12 minutes, obtain casting slurry；Wherein, the additional amount respectively pretreatment powder weight of polyethylene glycol, isopropanol, zinc stearate 8%, 0.5% and 2.5%；
Step S5, the green compact that step S4 is obtained carry out three sections of heat treatments：With the heating rate of 0.7oC/min from room temperature to 300oC keeps the temperature 12 hours, then is warming up to 1200oC with the heating rate of 1.2oC/min, and constant temperature 2 hours, then with 2.5oC/min Heating rate be warming up to 1400oC, constant temperature 2.0 hours, then after shaped working process, obtain zirconia ceramics cell phone rear cover.
Wherein, the preparation method of modified zirconia includes：
Step a, Zirconium oxide powder is put into the vacuum oven of 60oC, 2.5 hours dry, obtains dry zirconia powder End；Wherein, the granularity of Zirconium oxide powder is 1.0 microns, specific surface area 7.36m2/g~7.76m2/g；
The Zirconium oxide powder of the obtained drying of step a is added in dehydrated alcohol, and graphene is added by step b, graphene It after additional amount is the 4%, ultrasonic disperse 15 minutes of Zirconium oxide powder weight, is put into ball mill, wet ball grinding 24 hours, passes through Filter, 128oC are 9 hours dry, obtain modified zirconia.
Embodiment 4
A kind of preparation method of zirconia ceramics cell phone rear cover, is prepared via a method which：
Modified oxidized zirconium powder is uniformly mixed by step S1 with yttrium oxide powder, modified oxidized zirconium powder and yttrium oxide powder Mixed weight ratio is 100:6, obtain mixed-powder；
The obtained mixed-powder of step S1 is dissolved in dehydrated alcohol by step S2, and ammonium polyacrylate is added, and ammonium polyacrylate adds Enter 1.2%, 18oC wet grinding 20 hours that amount is mixed-powder weight, after being dried, obtains pretreatment powder；
Polyethylene glycol, isopropanol, zinc stearate, ultrasonic wave dispersion are added into the pretreatment powder that step S2 is obtained by step S3 15 minutes, obtain casting slurry；Wherein, the additional amount respectively pretreatment powder weight of polyethylene glycol, isopropanol, zinc stearate 9%, 1.2% and 1.0%；
Step S5, the green compact that step S4 is obtained carry out three sections of heat treatments：With the heating rate of 0.8oC/min from room temperature to 380oC keeps the temperature 7 hours, then is warming up to 1250oC with the heating rate of 1.0oC/min, and constant temperature 0.5 hour, then with 1.8oC/min Heating rate be warming up to 1460oC, constant temperature 3.0 hours, then after shaped working process, obtain zirconia ceramics cell phone rear cover.
Wherein, the preparation method of modified zirconia includes：
Step a, Zirconium oxide powder is put into the vacuum oven of 65oC, 3.5 hours dry, obtains dry zirconia powder End；Wherein, the granularity of Zirconium oxide powder is 0.7 micron, specific surface area 7.36m2/g~8.15m2/g；
The Zirconium oxide powder of the obtained drying of step a is added in dehydrated alcohol, and graphene is added by step b, graphene It after additional amount is the 5%, ultrasonic disperse 25 minutes of Zirconium oxide powder weight, is put into ball mill, wet ball grinding 19 hours, passes through Filter, 120oC are 11 hours dry, obtain modified zirconia.
Embodiment 5
A kind of preparation method of zirconia ceramics cell phone rear cover, is prepared via a method which：
Modified oxidized zirconium powder is uniformly mixed by step S1 with yttrium oxide powder, modified oxidized zirconium powder and yttrium oxide powder Mixed weight ratio is 100:4, obtain mixed-powder；
The obtained mixed-powder of step S1 is dissolved in dehydrated alcohol by step S2, and ammonium polyacrylate is added, and ammonium polyacrylate adds Enter 0.9%, 20oC wet grinding 28 hours that amount is mixed-powder weight, after being dried, obtains pretreatment powder；
Polyethylene glycol, isopropanol, zinc stearate, ultrasonic wave dispersion are added into the pretreatment powder that step S2 is obtained by step S3 10 minutes, obtain casting slurry；Wherein, the additional amount respectively pretreatment powder weight of polyethylene glycol, isopropanol, zinc stearate 6.5%, 1.0% and 1.5%；
Step S5, the green compact that step S4 is obtained carry out three sections of heat treatments：With the heating rate of 0.6oC/min from room temperature to 350oC keeps the temperature 9 hours, then is warming up to 1150oC with the heating rate of 1.3oC/min, and constant temperature 1.3 hours, then with 2.0oC/min Heating rate be warming up to 1440oC, constant temperature 1.5 hours, then after shaped working process, obtain zirconia ceramics cell phone rear cover.
Wherein, the preparation method of modified zirconia includes：
Step a, Zirconium oxide powder is put into the vacuum oven of 58oC, 3.2 hours dry, obtains dry zirconia powder End；Wherein, the granularity of Zirconium oxide powder is 0.8 micron, specific surface area 7.62m2/g~8.13m2/g；
The Zirconium oxide powder of the obtained drying of step a is added in dehydrated alcohol, and graphene is added by step b, graphene It after additional amount is the 3%, ultrasonic disperse 25 minutes of Zirconium oxide powder weight, is put into ball mill, wet ball grinding 20 hours, passes through Filter, 120oC are 9.5 hours dry, obtain modified zirconia.
Comparative example
A kind of preparation method of zirconia ceramics cell phone rear cover, is prepared via a method which：
Zirconium oxide powder is uniformly mixed, the mixed weight of Zirconium oxide powder and yttrium oxide powder by step S1 with yttrium oxide powder Than being 100:4, obtain mixed-powder；
The obtained mixed-powder of step S1 is dissolved in dehydrated alcohol by step S2, and ammonium polyacrylate is added, and ammonium polyacrylate adds Enter 0.9%, 20oC wet grinding 28 hours that amount is mixed-powder weight, after being dried, obtains pretreatment powder；
Polyethylene glycol, isopropanol, zinc stearate, ultrasonic wave dispersion are added into the pretreatment powder that step S2 is obtained by step S3 10 minutes, obtain casting slurry；Wherein, the additional amount respectively pretreatment powder weight of polyethylene glycol, isopropanol, zinc stearate 6.5%, 1.0% and 1.5%；
Step S5, the green compact that step S4 is obtained carry out three sections of heat treatments：With the heating rate of 0.6oC/min from room temperature to 350oC keeps the temperature 9 hours, then is warming up to 1150oC with the heating rate of 1.3oC/min, and constant temperature 1.3 hours, then with 2.0oC/min Heating rate be warming up to 1440oC, constant temperature 1.5 hours, then after shaped working process, obtain zirconia ceramics cell phone rear cover.
Experimental example
Technical progress in order to further illustrate the present invention is now further illustrated using experiment.
Experimental material：The zirconia ceramics cell phone rear cover produced of the embodiment of the present invention 1 ~ 5.
Experimental method：Compare the properties of a variety of materials under square one.
The test result of the zirconia ceramics cell phone rear cover of 1. embodiment 1 ~ 5 of table preparation
Material Density（g/cm3） Flexural strength（MPa） Hardness（HV1） Fracture toughness（MPa·m1/2）
Embodiment 1 6.06 918 1350 18.4
Embodiment 2 6.07 936 1362 18.6
Embodiment 3 6.07 925 1358 18.0
Embodiment 4 6.08 919 1360 18.3
Embodiment 5 6.08 932 1365 18.9
Comparative example 6.07 856 1265 17.2
The experimental results showed that the even density of zirconia ceramics cell phone rear cover prepared by the embodiment of the present invention 1 ~ 5, in 6.06g/ cm3~6.08g/cm3In range, hardness and flexural strength are larger, and fracture toughness is preferable.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification, Equivalent replacement, improvement etc. should be included in protection of the invention.

Claims (9)

1. a kind of preparation method of zirconia ceramics cell phone rear cover, which is characterized in that include the following steps：
Modified oxidized zirconium powder is uniformly mixed with yttrium oxide powder, obtains mixed-powder by step S1；The modified oxidized zirconium powder The mixed weight ratio of end and yttrium oxide powder is 100:2~6；
The obtained mixed-powder of step S1 is dissolved in dehydrated alcohol by step S2, and ammonium polyacrylate, 15oC ~ 25oC wet process is added Grinding 20 hours ~ 36 hours obtains pretreatment powder after being dried；
Polyethylene glycol, isopropanol, zinc stearate, ultrasonic wave dispersion 5 are added into the pretreatment powder that step S2 is obtained by step S3 Minute ~ 15 minutes, obtain casting slurry；The polyethylene glycol, isopropanol, zinc stearate additional amount be respectively pre-process powder 4.5% ~ 9%, 0.5% ~ 1.5% and the 0.5% ~ 2.5% of weight；
Step S4, the casting slurry vacuum defoamation that step S3 is obtained obtain green compact through tape casting；
Step S5, the green compact that step S4 is obtained carry out three sections of heat treatments, then after shaped working process, obtain zirconia ceramics Cell phone rear cover.
2. the preparation method of zirconia ceramics cell phone rear cover according to claim 1, which is characterized in that described in step S1 The mixed weight of modified oxidized zirconium powder and yttrium oxide powder ratio is 100:4.
3. the preparation method of zirconia ceramics cell phone rear cover according to claim 1, which is characterized in that described in step S1 The preparation method of modified zirconia includes：
Step, Zirconium oxide powder is put into the vacuum oven of 50oC ~ 65oC, it is 2.5 hours ~ 4 hours dry, obtain drying Zirconium oxide powder；
Step, by stepThe Zirconium oxide powder of obtained drying is added in dehydrated alcohol, and graphene is added, ultrasonic disperse It after 15 minutes ~ 30 minutes, is put into ball mill, wet ball grinding 18 hours ~ 24 hours, is filtered, dried, obtained modified oxidized Zirconium.
4. the preparation method of zirconia ceramics cell phone rear cover according to claim 3, which is characterized in that stepIn, the oxygen The granularity for changing zirconium powder is 0.6 micron ~ 1.0 microns, specific surface area 7.36m2/g~8.15m2/g。
5. the preparation method of zirconia ceramics cell phone rear cover according to claim 3, which is characterized in that stepIn, the stone The additional amount of black alkene is the 1% ~ 5% of Zirconium oxide powder weight.
6. the preparation method of zirconia ceramics cell phone rear cover according to claim 3, which is characterized in that stepIn, it is described dry Dry is 8 hours ~ 11 hours dry under 120oC ~ 130oC.
7. the preparation method of zirconia ceramics cell phone rear cover according to claim 1, which is characterized in that described in step S2 The additional amount of ammonium polyacrylate is the 0.3% ~ 1.5% of mixed-powder weight.
8. the preparation method of zirconia ceramics cell phone rear cover according to claim 1, which is characterized in that described in step S3 6.5%, 1.0% and the 1.5% of the additional amount respectively pretreatment powder weight of polyethylene glycol, isopropanol, zinc stearate.
9. the preparation method of zirconia ceramics cell phone rear cover according to claim 1, which is characterized in that described in step S5 Three sections of heat treatments are：With the heating rate of 0.4oC/min ~ 0.8oC/min from room temperature to 300oC ~ 400oC, 6 hours are kept the temperature ~ 12 hours, then 1050oC ~ 1250oC is warming up to the heating rate of 1.0oC/min ~ 1.5oC/min, constant temperature 0.5 ~ 2 hour, then 1400oC ~ 1480oC is warming up to the heating rate of 1.5oC/min ~ 2.5oC/min, constant temperature 0.5 hour ~ 3 hours.
CN201810919934.3A 2018-08-14 2018-08-14 A kind of preparation method of zirconia ceramics cell phone rear cover Pending CN108840675A (en)

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CN110204334A (en) * 2019-05-29 2019-09-06 常州大学 A kind of high-compactness Zirconium oxide powder injection moulding PP Pipe Compound and preparation method thereof
CN111548150A (en) * 2020-05-17 2020-08-18 陕西励峰德精密陶瓷科技有限公司 Preparation process for preparing ceramic rear cover by gel casting

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Publication number Priority date Publication date Assignee Title
CN110204334A (en) * 2019-05-29 2019-09-06 常州大学 A kind of high-compactness Zirconium oxide powder injection moulding PP Pipe Compound and preparation method thereof
CN110204334B (en) * 2019-05-29 2021-12-21 常州大学 Special material for high-density zirconium oxide powder injection molding and preparation method thereof
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