CN109650720A - Mobile terminal glass back-cover substrate and its production method - Google Patents

Mobile terminal glass back-cover substrate and its production method Download PDF

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Publication number
CN109650720A
CN109650720A CN201910029634.2A CN201910029634A CN109650720A CN 109650720 A CN109650720 A CN 109650720A CN 201910029634 A CN201910029634 A CN 201910029634A CN 109650720 A CN109650720 A CN 109650720A
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China
Prior art keywords
glass
temperature
mobile terminal
mold
cover substrate
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Granted
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CN201910029634.2A
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CN109650720B (en
Inventor
胡勇波
肖调坤
郑卓群
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Ningbo Xingshu New Energy Technology Co Ltd
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Ningbo Xingshu New Energy Technology Co Ltd
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Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/076Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/095Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00Other methods of shaping glass
    • C03B19/06Other methods of shaping glass by sintering, e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B25/00Annealing glass products
    • C03B25/02Annealing glass products in a discontinuous way
    • C03B25/025Glass sheets
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00Severing cooled glass
    • C03B33/02Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C1/00Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/04Opacifiers, e.g. fluorides or phosphates; Pigments
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/076Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium

Abstract

The invention discloses a kind of mobile terminal glass back-cover substrate and its production methods, the uniform batch as composed by various raw materials generates uniform glass melt at high temperature and is shaped to glass ingot by kinds of processes first, is then cut into the glass flake caning be processed as mobile terminal back-cover by diamond wire multi-line cutting process.Simple production process of the present invention, easy to operate, dimensional accuracy is high, high production efficiency, and qualification rate is high, and quality is stablized, at low cost, can large-scale industrial production, be particularly suitable for high-intensitive production, high tenacity and more frivolous 5G mobile terminal glass back-cover substrate.

Description

Mobile terminal glass back-cover substrate and its production method
Technical field
The present invention relates to mobile terminal part field more particularly to a kind of mobile terminal glass back-cover substrate and its productions Method.
Background technique
Glass belongs to the relatively early material for being applied to cell phone back cover, but because conventional glass materials intensity is lower, is falling, touching Hit, scrape etc. easily cause during routine uses to be crushed, slight crack or scratch, replaced by metal rapidly.By the development of many years, Great promotion has been obtained in glass properties, solve substantially it is frangible, problems, the glass such as scratch and opened compared with the advantage of metal material Beginning shows.Since glass is by the characteristic of thermal softening, heating is easily processed into curve form, and cost declines to a great extent compared with metal material. It is gradually promoted as 5G communicates coming, wireless charging, metal back cover signal shielding defect is obvious, cell phone back cover metallization removal It is main trend.Glass proposals maturity is high, and cost is lower, is expected to become middle and high ends type mainstream scheme.Hand-set lid (panel with Backboard) double vitrifyings, industry size will be driven quickly to break out.
Currently, the mainstream procedure for producing of mobile terminal glass back-cover substrate uses " overflow down draw " technique: a slot is set, when The glass precursor solution of melting fills entire groove body, and extra glass precursor solution overflows from the edge of slot and collect in the bottom of slot, is formed One plane, and flow downward and to form a continual thin slice.In the process, engineer utilizes advanced technique and height The equipment of automation, allows glass to form in air, is then drawn into one block of thin and smooth glass.But it is overflow using melting The thin glass plate product that drawing process manufacture has high yield and flatness is flowed down, difficulty is larger.For many years, many experts have been The many technologies and technological problems of the possible influence process stability in sheets of glass forming process are overcome, but complete so far Only two or three company can be realized the industrialization of " overflow down draw " technique in the world.
Another prevailing technology is that " float glass process " technique is utilized to prepare thin glass plate, and advantage is obvious, for example, being easy to scientific pipe Reason and realization all fronts mechanization, automation, labor productivity are high;Period of working continuously is several years, is conducive to steadily give birth to It produces, but disposable apparatus investment is big, kiln is at high cost, the strength of glass and poor toughness of production.
No matter " overflow down draw " technique or " float glass process " technique, have harsh requirement, to the ingredient of glass raw material to protect Card glass melts have " material property " i.e. mobility of molten liquid well, but glass its intensity difference that expecting property is good;In order to improve Strength of glass meets the requirement of mobile terminal glass back-cover, generally to increase content (i.e. " the high alumina glass of aluminium in glass raw material Glass ").But high lead glass, although intensity is high, material property is poor, and aluminium content height will be unfavorable for the homogenizing and clarification of glass melts, no Conducive to the realization of overflow down draw or floating process, mobile terminal glass back-cover " frangible " is exactly to be limited by aluminium content in raw material at present Reason that cannot be too high.
As appearance of the people to smart terminal product is aesthetic and the promotion of performance requirement, the back of the mobile terminals such as mobile phone Lid is also from plane gradually to 2.5D curved surface, 3D surface blending.3D curved surface back-cover require glass substrate is frivolous, scratch-resistant, it is resistance to fall and Plasticity is strong, therefore proposes requirements at the higher level to the regulation of the formula of glass raw material and processing technology.Traditional process of glass It is only applicable to the manufacture relatively-stationary glass substrate of chemical component, for example, the glass of floating process production, consisting of high calcium, Middle magnesium, low aluminium, micro- iron.Mobile terminal glass back-cover is usually high lead glass, and the mechanical strength of glass can be improved in the introducing of aluminium, Al2O3Content be 13% or so, it is even higher, it is clear that floating process is not optimal selection.The introducing of other certain ingredients is then The material (or viscosity) and surface tension that will affect glass melts, to influence shrinking percentage when molding, thickness and uniformity etc.. Therefore, the functional glass that " overflow down draw " technique and " float glass process " technique are not necessarily suitble to manufacture to contain certain special compositions, example Such as ceramic toughening glass.
Summary of the invention
The present invention proposes a kind of mobile terminal glass back-cover substrate and its production method to solve the above technical problems.
In order to achieve the above object, the technical scheme adopted by the invention is as follows:
According to a first aspect of the embodiments of the present invention, a kind of mobile terminal glass back-cover substrate, including following total weight are provided The constitutive material of percentage: SiO2 40-60%、Na2O 0-5%、CaO 0-10%、Al2O315-35%,MgO 0-10%;And add Add agent 5-45%.
Preferably, the additive includes TiO2、ZrO2、K2O、B2O3、BaO、ZnO、Y2O3、Ce2O3And Li2In O It is one or more, wherein to account for total weight percent as follows for each ingredient: B2O3 0-15%、BaO 0-5%、ZnO 0-10%、Y2O3 0- 5%、Ce2O3 0-5%、Li2O 0-5%、TiO2 0-5%、ZrO2 0-5%、K2O 0-5%。
Preferably, further including ion coloring agent, the ion coloring agent includes Mn2O3、CoO、Co3O4、Cr2O3In One or more, the percentage that ion coloring agent accounts for total weight is 2-8%.
According to a second aspect of the embodiments of the present invention, a kind of production method of mobile terminal glass back-cover substrate is provided, Include the following steps:
(1) raw material of following weight percent, SiO raw material preparation: are weighed2 40-60%、Na2O 0-5%、CaO 0-10%、Al2O3 15-35%,MgO 0-10%;And additive 5-45%;
(2) Raw material processing: purifying gained raw material, be crushed, crushed, sieved, and obtained feed particles partial size is micro- 0.10 Rice~0.80 millimeter between;
(3) prepared by batch: the batch of uniformity mixed powder is ground and is mixed into as ball mill feed particles by obtained by, The partial size of batch is between 0.2 micron~0.1 millimeter after ball milling and screening;
(4) prepared by glass ingot: by broken crucible method, model casting or post forming and the glass of crystallite is made in batch by sintering process Glass ingot;
(5) diamond wire multi-wire saw: being cut into the glass substrate with a thickness of 0.08~2.0 millimeter for glass ingot by cutting machine, Cutting speed when cutting is 600~3000 ms/min, and cutting time is 10~900 minutes.
Preferably, the additive in the step (1) includes TiO2、ZrO2、K2O、B2O3、BaO、ZnO、Y2O3、Ce2O3 And Li2One of O or a variety of, wherein to account for total weight percent as follows for each ingredient: B2O3 0-15%、BaO 0-5%、ZnO 0- 10%、Y2O3 0-5%、Ce2O3 0-5%、Li2O 0-5%、TiO2 0-5%、ZrO2 0-5%、K2O 0-5%。
Preferably, the raw material in the step (1) further includes ion coloring agent, ion coloring agent accounts for total weight percent 2-8%.
As a preference, breaking crucible method in the step (4), specific step is as follows: batch is put into mould resistant to high temperature It in tool and smoothes out, be compacted, be placed in high temperature furnace together with mold, be warming up to 800~900 with 7-15 DEG C/min of heating rate DEG C, 0.5~1.5 hour is kept the temperature, then continue to be warming up to 1450~1600 DEG C with 2-7 DEG C/min of heating rate, heat preservation 2~3 is small When;Glass metal is generated under high temperature action, it is cooling that glass metal removes high temperature furnace with mold after abundant melting, deaeration, clarification;It will melt There is glass metal and the mold that has cooled down is put into temperature and has risen in 400~700 DEG C of annealing furnace, annealing heat preservation 2~3 hours, so Natural cooling afterwards dismantles mold and obtains glass ingot.
As a further preference, the crystallization furnace that the mold transposition after annealing is 700~1000 DEG C in crystallization temperature Middle completion crystallization after slow cooling to room temperature, dismantles mold and takes out glass ingot.
As another preferred embodiment, specific step is as follows for model casting in the step (4): batch is put into glass Smelting furnace is warming up to 1000 DEG C with 7-15 DEG C/min of heating rate, keeps the temperature 1.5 hours, then with 2-7 DEG C/min of heating rate after It is continuous to be warming up to 1480 DEG C, 3 hours are kept the temperature, uniform and viscous glass metal is generated under high temperature action;Then glass metal is poured into Enter in the preheated mold to 500~550 DEG C, it is cooling;The mold for being marked with glass metal and having cooled down is put into temperature and has risen to 400 In~700 DEG C of annealing furnace, annealing heat preservation 30~300 minutes, then natural cooling, dismantles mold and obtains glass ingot.
As a further preference, the mold after annealing, which is placed in, is preheated to the crystallization that crystallization temperature is 700~900 DEG C Carry out Crystallizing treatment in furnace, crystallization time 60~600 minutes;Finally by certain temperature schedule slow cooling to room temperature, demoulding Take out devitrified glass ingot.
Preferably as another, simultaneously specific step is as follows for sintering process for post forming in the step (4): (A) water quenching is broken Broken, ball milling: putting into batch in glass-melting furnace and be powered, is warming up to 1000 DEG C with 7-15 DEG C/min of heating rate, heat preservation 1.5 hours, then continue to be warming up to 1550 DEG C with 2-7 DEG C/min of heating rate, 2.5 hours are kept the temperature, is formed under high temperature action high The glass metal of temperature;Glass metal is poured into the container for filling with clear water, water quenching glass particle, draining, drying, broken, ball milling are formed To average grain diameter less than 0.20 millimeter, it is prepared into glass fine powder;
(B) high pressure pressed glass ingot blank: glass fine powder is placed in mold, through the compacting of 70MPa hydraulic press simultaneously pressure maintaining 15 minutes, is torn open Mould to obtain glass ingot blank;
(C) burning glass ingot: glass ingot blank is placed in high temperature furnace, first continues to be warming up to 600 with 7-15 DEG C/min of heating rate DEG C, keep the temperature 0.5~1 hour;Then continue to be warming up to 1010~1400 DEG C with 2-7 DEG C/min of heating rate, keep the temperature 2.5 hours, Sinter porcelain into;500~1000 DEG C of thorough crystallization of crystallization temperature are cooled to 2-7 DEG C/min of cooling rate again, keep the temperature 3 hours;From It is so cooled to room temperature, obtains glass ingot.
As a further preference, after toughening material is added in the step (B), in glass fine powder and is sufficiently mixed uniformly It is placed in mold and suppresses again, the weight percent of the toughening material is 5-25%.
Preferably, the toughening material includes zirconia powder, Zirconium oxide fibre or whisker, silicon carbide fibre or whisker One of or it is a variety of.
Preferably, the cavity length of mould therefor is 10~2000 millimeters, intracavity section width is 10~300 millimeters, Intracavity section height is 50~500 millimeters.
Preferably, the material of mold is aluminium oxide, graphite, silicon carbide or heat-resisting alloy steel.
Compared with prior art, the present invention realizes that high intensity, high tenacity, height are resistance to by the high-intensitive glass formula of design It scrapes, thinner mobile terminal glass back-cover, and solves high strength glass formula and volume production cannot achieve using traditional handicraft The problem of.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the production method of mobile terminal glass back-cover substrate of the present invention.
Specific embodiment
Below with reference to specific embodiment shown in the drawings, the present invention will be described in detail.But these embodiments are simultaneously The present invention is not limited, structure that those skilled in the art are made according to these embodiments, method or functionally Transformation is included within the scope of protection of the present invention.
It is only to be not intended to limit the invention merely for for the purpose of describing particular embodiments in terminology used in the present invention. It is also intended in the present invention and the "an" of singular used in the attached claims, " described " and "the" including majority Form, unless the context clearly indicates other meaning.It is also understood that term "and/or" used herein refers to and wraps It may be combined containing one or more associated any or all of project listed.
The embodiment of the present invention in a first aspect, providing a kind of mobile terminal glass back-cover substrate, including following total weight The constitutive material of percentage: SiO2 40-60%、Na2O 0-5%、CaO 0-10%、Al2O315-35%,MgO 0-10%;And add Add agent 5-45%.
It is above at being grouped as, according to frivolous, scratch-resistant, it is resistance to fall and the performance requirements such as plasticity is strong, utilize existing material Material, scientific knowledge and practical experience analysis, synthesis simultaneously design.SiO2、Na2O、CaO、Al2O3, one of MgO or a variety of conducts Basis, at the same for make glass obtain necessary intensity, toughness, scraping and wiping resistance performance and introduce certain special materials.
Wherein, the additive may include TiO2、ZrO2、K2O、B2O3、BaO、ZnO、Y2O3、Ce2O3And Li2In O It is one or more, wherein to account for total weight percent as follows for each ingredient: B2O3 0-15%、BaO 0-5%、ZnO 0-10%、Y2O3 0-5%、Ce2O3 0-5%、Li2O 0-5%、TiO2 0-5%、ZrO2 0-5%、K2O 0-5%.In addition, Sb can also be added2O5、P2O5、 SiC and CeO2Equal materials.By adding toughener, the mobile terminal glass back-cover of high tenacity may be implemented.
It particularly, can also include ion coloring agent, the ion coloring agent includes Mn2O3、CoO、Co3O4、Cr2O3In One or more.By adding ion colorant, cell phone back cover color is enriched, meets the needs of different consumer groups: needing purple Color can then add Mn2O3, need sky blue that can then add CoO, need grey that can then add Co3O4, green is needed then may be used To add Cr2O3Deng.Ion coloring agent typically constitutes from the 2-8% of total weight percent.
The second aspect of the embodiment of the present invention provides a kind of production method of mobile terminal glass back-cover substrate, such as Fig. 1 It is shown, include the following steps:
(1) raw material of following weight percent, SiO raw material preparation: are weighed2 40-60%、Na2O 0-5%、CaO 0-10%、Al2O3 15-35%,MgO 0-10%;And additive 5-45%.Wherein, additive may include TiO2、ZrO2、K2O、B2O3、BaO、ZnO、 Y2O3、Ce2O3And Li2One of O or a variety of, wherein to account for total weight percent as follows for each ingredient: B2O3 0-15%、BaO 0- 5%、ZnO 0-10%、Y2O3 0-5%、Ce2O3 0-5%、Li2O 0-5%、TiO2 0-5%、ZrO2 0-5%、K2O 0-5%。
Raw material can also meet the different consumer groups' including ion coloring agent to enrich the back-cover color of mobile terminal Demand.For example, purple then adds Mn2O3, sky blue then adds CoO, and grey then adds Co3O4, green then add Cr2O3Deng.
(2) Raw material processing: purifying gained raw material, be crushed, crushed, sieved, and obtained feed particles partial size exists Between 0.10 micron~0.80 millimeter.
In order to be conducive to Flow of Goods and Materials, be uniformly mixed and accelerate melting sources speed, raw material is processed, including The processes such as purification, broken, crushing/ball milling, screening;Generally, glass production requires the partial size of raw material 0.10 micron~0.80 Between millimeter, preferably 0.20 micron~0.10 millimeter.
(3) prepared by batch: being ground as ball mill feed particles by obtained by and is mixed into matching for uniformity mixed powder Material is closed, the partial size of batch is between 0.2 micron~0.1 millimeter after ball milling and screening.
(4) prepared by glass ingot: by broken crucible method, model casting or post forming and crystallite is made in batch by sintering process Glass ingot.
No matter broken crucible method, model casting or post forming and be sintered legal system glass ingot, be both needed to control the partial size of material, Uniform mixing, temperature process system of keeping under strict control.By Crystallizing treatment, the mobile end of high intensity, high tenacity, high scratch-resistant may be implemented Hold glass back-cover.
The first is broken crucible method, the specific steps are as follows:
Batch is put into mold resistant to high temperature and is smoothed out, is compacted, is placed in high temperature furnace together with mold, with 7-15 DEG C/minute The heating rate of clock is warming up to 800~900 DEG C, keeps the temperature 0.5~1.5 hour, then continue to heat up with 2-7 DEG C/min of heating rate To 1450~1600 DEG C, 2~3 hours are kept the temperature;Glass metal is generated under high temperature action, glass metal is through abundant melting, deaeration, clarification It is cooling that high temperature furnace is removed with mold afterwards;It the molten mold for having glass metal and having cooled down is put into temperature has risen to 400~700 DEG C and move back In stove, annealing heat preservation 2~3 hours, then natural cooling, dismantles mold and obtains glass ingot.
In order to obtain better strength and toughness performance, mold after annealing can with transposition in crystallization temperature for 700 It completes crystallization in~1000 DEG C of crystallization furnace, after slow cooling to room temperature, dismantles mold and take out glass ingot.
In addition, broken crucible method can also be using another form:
Batch is put into mold resistant to high temperature and is smoothed out, is compacted, is placed in high temperature furnace together with mold, under high temperature action Glass metal is generated, glass metal presses the greenhouse cooling that is suitable for crystallization temperature after abundant melting, deaeration, clarification in high temperature furnace, Again by certain temperature schedule slow cooling to room temperature after abundant crystallization;Finally by mold breakdown, devitrified glass ingot is taken out.
Second is model casting, the specific steps are as follows:
Batch is put into glass-melting furnace, 1000 DEG C is warming up to 7-15 DEG C/min of heating rate, keeps the temperature 1.5 hours, then with 2-7 DEG C/min of heating rate continues to be warming up to 1480 DEG C, keeps the temperature 3 hours, uniform and viscous glass is generated under high temperature action Liquid;Then glass metal is poured into the preheated mold to 500~550 DEG C, it is cooling;The mould that glass metal will be marked with and cooled down Tool is put into temperature and has risen in 400~700 DEG C of annealing furnace, and annealing heat preservation 30~300 minutes, then natural cooling, dismantles mould Tool obtains glass ingot.
In order to obtain better strength and toughness performance, the mold after annealing, which can be placed in, to be preheated to crystallization temperature and is Carry out Crystallizing treatment in 700~900 DEG C of crystallization furnace, crystallization time 60~600 minutes;It is finally slow by certain temperature schedule It is cooled to room temperature, devitrified glass ingot is taken out in demoulding.
The third is post forming and sintering process, the specific steps are as follows:
(A) water quenching, broken, ball milling: batch is put into glass-melting furnace and is powered, with 7-15 DEG C/min of heating rate liter Temperature keeps the temperature 1.5 hours to 1000 DEG C, then continues to be warming up to 1550 DEG C with 2-7 DEG C/min of heating rate, keeps the temperature 2.5 hours, high The glass metal of high temperature is formed under temperature effect;Glass metal is poured into the container for filling with clear water, formation water quenching glass particle, draining, It dries, be crushed, being milled to average grain diameter less than 0.20 millimeter, being prepared into glass fine powder;
(B) high pressure pressed glass ingot blank: glass fine powder is placed in mold, through the compacting of 70MPa hydraulic press simultaneously pressure maintaining 15 minutes, is torn open Mould to obtain glass ingot blank;
(C) burning glass ingot: glass ingot blank is placed in high temperature furnace, first continues to be warming up to 600 with 7-15 DEG C/min of heating rate DEG C, keep the temperature 0.5~1 hour;Then continue to be warming up to 1010~1400 DEG C with 2-7 DEG C/min of heating rate, keep the temperature 2.5 hours, Sinter porcelain into;500~1000 DEG C of thorough crystallization of crystallization temperature are cooled to 2-7 DEG C/min of cooling rate again, keep the temperature 3 hours;From It is so cooled to room temperature, obtains glass ingot.
Particularly, toughening material is added in step (B), in glass fine powder and is placed in mold again after being sufficiently mixed uniformly presses System, the weight percent of the toughening material are 5-25%.Wherein, toughening material includes zirconia powder, Zirconium oxide fibre or crystalline substance One of palpus, silicon carbide fibre or whisker are a variety of.
In the method for above-mentioned all kinds of glass ingot preparation, mould therefor is designed to certain shape, size according to actual needs, Mold cavity surfaces spray high temperature resistant release agent, prevent adhesion.The shape of mold is cuboid, the cross-sectional width of mold inner-cavity with And the size of height, the back-cover specification provided by mobile device manufacturers determine that suitably there are machining allowance with requirement;Mold Length equipment used in subsequent diamond wire multi-wire saw process determines.The cavity length of preferred technical solution, mold is 10~2000 millimeters, preferably 100~1200 millimeters;The cross-sectional width of mold inner-cavity be 10~300 millimeters, preferably 50 ~250 millimeters;The intracavity section height of mold is 50~500 millimeters, preferably 100~300 millimeters.The material of mold is excellent Select inorganic material resistant to high temperature, such as aluminium oxide, graphite perhaps silicon carbide or metal material resistant to high temperature, such as resistance to heat seal Golden mould steel.Cavity length be 10~2000 millimeters, intracavity section width be 10~300 millimeters, intracavity section height be 50 ~500 millimeters.By changing the size of glass ingot mold, the mobile terminal glass back-cover that can satisfy various specifications size is thinner Requirement.
(5) glass ingot diamond wire multi-wire saw: is cut into the glass base with a thickness of 0.08~2.0 millimeter by cutting machine Piece, cutting speed when cutting are 600~3000 ms/min, and cutting time is 10~900 minutes.
Buddha's warrior attendant wire cutting has the characteristics that cutting speed is fast, cutting accuracy is high, material loss is low, by diamond wire multi-wire saw Technology is applied to mobile terminal glass back-cover manufacture field, can meet market for more inexpensive, higher size progress, more Gao Sheng The requirement of efficiency is produced, the more and more thinner toughening sheet glass of cutting thickness is particularly suitable for.Preferably, the movement of diamond wire multi-wire saw Terminal glass back-cover substrate with a thickness of 0.08~2. millimeter, preferably 0.30~1.00 millimeter;The slice processing time is 10~900 Minute, preferably 30~600 minutes.The type of diamond wire is unlimited, either resin-bonded diamond wire is also possible to electroplating gold Hard rock line, 9~1000 microns of Buddha's warrior attendant linear diameter, preferably 30~600 microns;Generally, cutting speed is 600~3000 ms/min Clock.
Subsequent work, including inspection and deep processing: examining includes detection spot defect, line defect, dirty, shrinking percentage Deng and the projects such as tempered glass hardness test;Deep processing is processed into 2.5D, 3D glass back-cover finished product by glass substrate, with The technique of ordinary plate glass or float glass or overflow downdraw glass substrate working process is no different, and process flow specifically includes that Engineering → sawing sheet aperture → finishing impression → grinding → cleaning → hot bending → polishing → detection → tempering → UV transfer → plated film (PVD) → Print (silk-screen, spraying, UV machine photocuring) → fitting → pad pasting → packaging etc..
The production method of mobile terminal glass back-cover substrate is described below with reference to specific embodiment.
Embodiment 1.
(1) raw material preparation: according to mass percentage meter, comprising: SiO2 50.0%、Na2O 5.0%、Al2O3 15.0%、 MgO 5.0%、CaO 5.0%、B2O3 10.0%、BaO 2.0%、ZnO 5.0%、Y2O3 1.0%、Ce2O3 1.0%, Li2O 1.0%。
(2) it Raw material processing: purifies, be crushed, crushing, sieving each raw material, each raw material particle size is not more than 0.80 millimeter.
(3) preparation of batch: according to ingredient design in each raw material of mass percent precise, pass through ball mill will Each raw material wears into thinner powder and mixes each raw material, obtains uniform mixed powder;Batch after ball milling and screening Partial size is less than 0.0635 millimeter.
(4) prepared by glass ingot: broken crucible method.
Mold inner-cavity is having a size of 530 millimeters * 80 millimeters * 180 millimeters.
It is melted: using " broken crucible method " moulding process, batch first being filled up into sky mold, floating, compacting, sets mold in electric furnace It is interior, it is powered to electric furnace, is warming up to 900 DEG C with 8 DEG C/min of heating rate, keeps the temperature 0.5 hour, then heated up with 5 DEG C/min Speed continues to be warming up to 1450 DEG C, keeps the temperature 2 hours;Then mold is taken out from electric furnace.
Annealing: the molten mold for having glass metal and having cooled down is put into temperature and has been risen in 500 DEG C of annealing furnaces, annealing furnace is shut Door keeps the temperature 2 hours, and power-off allows its natural cooling, and cuboid glass ingot is made.
(5) diamond wire multi-wire saw: cutting machine model QPJ1660B/C in the present embodiment, Buddha's warrior attendant linear diameter are 200 micro- Rice, according to product specification and processing request adjustment diamond wire slot pitch to 0.70 millimeter, by above-mentioned glass ingot be cut into a thickness of 0.50 millimeter of mobile terminal glass back-cover substrate, 1600 ms/min of cutting speed, process time is no more than 4 hours.
The mobile terminal glass back-cover substrate finally obtained, average thickness are 0.501 millimeter.
Embodiment 2.
(1) raw material preparation: according to mass percentage meter, comprising: SiO2 53.0%、Al2O3 22.0%、MgO 5.0%、 CaO 5.0%、B2O3 10.0%、BaO 2.0%、Li2O 1.0%、Mn2O3 2.0%.Wherein, Mn2O3For ion coloring agent, so as to move Purple is presented in the back-cover of dynamic terminal.
(2) Raw material processing: purification, broken, crushing, ball milling, each raw material of screening, the partial size of each raw material is less than after screening 0.085 millimeter.
(3) preparation of batch: according to ingredient design in each raw material of mass percent precise, pass through V-type mixing Each raw material is sufficiently mixed by machine, obtains uniform batch.
(4) prepared by glass ingot: broken crucible method.
Mold inner-cavity is having a size of 750 millimeters * 80 millimeters * 180 millimeters.
It is melted: using " broken crucible method " moulding process, batch first being filled up into sky mold, floating, compacting, sets mold in electric furnace It is interior, it is powered to electric furnace, is warming up to 1000 DEG C with 8 DEG C/min of heating rate, keeps the temperature 1.5 hours, then heated up with 5 DEG C/min Speed continues to be warming up to 1600 DEG C, keeps the temperature 3 hours;Then mold is taken out from electric furnace.
Annealing: the molten mold for having glass metal and having cooled down is put into temperature and has been risen in 550 DEG C of annealing furnaces, annealing furnace is shut Door keeps the temperature 2 hours, and power-off allows its natural cooling, and cuboid glass ingot is made.
(5) diamond wire multi-wire saw: the Dalian cutting machine model QPJ1660B/C(Liancheng in the present embodiment), diamond wire is straight Diameter is 200 microns, and according to product specification and processing request adjustment diamond wire slot pitch to 0.95 millimeter, above-mentioned glass ingot is cut At the mobile terminal glass back-cover substrate with a thickness of 0.70 millimeter, 1600 ms/min of cutting speed, process time is no more than 4 Hour.
The mobile terminal glass back-cover substrate finally obtained, average thickness are 0.698 millimeter.
Embodiment 3.
(1) raw material preparation: according to mass percentage meter, comprising: SiO2 60.0%、Al2O3 15.0%、MgO 5.0%、 CaO 5.0%、ZnO5.0%、Y2O3 5.0%、Li2O 5.0%。
(2) it Raw material processing: purifies, be crushed, crushing, sieving each raw material, each raw material particle size is not more than 0.80 millimeter.
(3) preparation of batch: according to ingredient design in each raw material of mass percent precise, pass through ball mill will Each raw material wears into thinner powder and mixes each raw material, obtains uniform mixed powder;Batch after ball milling and screening Partial size is less than 0.0635 millimeter.
(4) prepared by glass ingot: broken crucible method.
Mold inner-cavity is having a size of 680 millimeters * 80 millimeters * 180 millimeters.
It is melted: using " broken crucible method " moulding process, batch first being filled up into sky mold, floating, compacting, sets mold in electric furnace It is interior, it is powered to electric furnace, is warming up to 800 DEG C with 8 DEG C/min of heating rate, keeps the temperature 1.5 hours, then heated up with 5 DEG C/min Speed continues to be warming up to 1500 DEG C, keeps the temperature 2 hours;Then mold is taken out from electric furnace.
Annealing: the molten mold for having glass metal and having cooled down is put into temperature and has been risen in 500 DEG C of annealing furnaces, annealing furnace is shut Door keeps the temperature 2 hours, and power-off allows its natural cooling, and cuboid glass ingot is made.
(5) diamond wire multi-wire saw: the Dalian cutting machine model QPJ1660B/C(Liancheng in the present embodiment), diamond wire is straight Diameter is 250 microns, and according to product specification and processing request adjustment diamond wire slot pitch to 1.25 millimeters, above-mentioned glass ingot is cut into With a thickness of 0.90 millimeter of mobile phone glass piece, 2000 ms/min of cutting speed, process time is no more than 3.5 hours.
The mobile terminal glass back-cover substrate finally obtained, average thickness are 0.901 millimeter.
Embodiment 4.
(1) raw material preparation: according to mass percentage meter, comprising: SiO2 45.0%、Al2O3 25.0%、Na2O 5.0%、 MgO 2.0%、B2O3 15.0%、ZrO21.5%、ZnO 5%、Li2O 1.5% etc..
(2) Raw material processing: purification, broken, crushing, ball milling, each raw material of screening, it is ensured that the partial size of each raw material is not more than 0.127 millimeter.
(3) preparation of batch: according to ingredient design in each raw material of mass percent precise, pass through V-type mixing Each raw material is sufficiently mixed by machine, obtains uniform batch.
(4) prepared by glass ingot: model casting.
Mold inner-cavity is having a size of 330 millimeters * 75 millimeters * 150 millimeters.
It is melted: using " model casting " moulding process, batch is put into glass-melting furnace and be powered to smelting furnace, with 8 DEG C/min heating rate be warming up to 1000 DEG C, keep the temperature 1.5 hours, then continue to be warming up to 1480 with 5 DEG C/min of heating rates DEG C, keep the temperature 3 hours;Then high-temperature glass liquid is poured into the preheated mold to 500 DEG C.
Annealing: the mold for being marked with glass metal and having cooled down is put into temperature and has been risen in 550 DEG C of annealing furnaces, annealing furnace is shut Door keeps the temperature 3 hours, and power-off allows its natural cooling, dismantles mold and cuboid glass ingot is made.
(5) diamond wire multi-wire saw: the Dalian cutting machine model QPJ1660B/C(Liancheng in the present embodiment), diamond wire is straight Diameter is 200 microns, and according to product specification and processing request adjustment diamond wire slot pitch to 0.85 millimeter, above-mentioned glass ingot is cut At the mobile phone glass piece with a thickness of 0.60 millimeter, 1600 ms/min of cutting speed, process time is no more than 4 hours.
The mobile terminal glass back-cover substrate finally obtained, average thickness are 0.602 millimeter.
Embodiment 5.
(1) raw material preparation: according to mass percentage meter, comprising: SiO2 55.4%、Na2O 5.0%、Al2O3 22.0%、 MgO 3.0%、B2O3 10.6%、Ce2O3 1.5%、Li2O 2.5%。
(2) Raw material processing: purification, broken, crushing, ball milling, each raw material of screening, it is ensured that the partial size of each raw material is not more than 0.127 millimeter.
(3) preparation of batch: according to ingredient design in each raw material of mass percent precise, pass through V-type mixing Each raw material is sufficiently mixed by machine, obtains uniform batch.
(4) prepared by glass ingot: model casting.
Mold inner-cavity is having a size of 330 millimeters * 75 millimeters * 150 millimeters.
Water quenching, broken, ball milling: batch is put into glass-melting furnace and is powered to smelting furnace, with 8 DEG C/min of heating speed Degree is warming up to 1000 DEG C, keeps the temperature 1.5 hours, then continues to be warming up to 1550 DEG C with 5 DEG C/min of heating rates, and heat preservation 2.5 is small When, form high-temperature glass liquid;High-temperature glass liquid is poured into the container for filling with clean clear water, formation water quenching glass particle, draining, It dries, be crushed, being milled to average grain diameter less than 0.072 millimeter, being prepared into glass fine powder.
High pressure pressed glass ingot blank: glass fine powder is placed in high-strength alloy mould steel, simultaneously through the compacting of 70MPa hydraulic press Demoulding, glass ingot blank is made in pressure maintaining 15 minutes.
Burning glass ingot: glass ingot blank is placed in high temperature furnace, first continues to be warming up to 600 with 8 DEG C/min of heating rates DEG C, keep the temperature 0.5h;Then continue to be warming up to 1010 DEG C with 5 DEG C/min of heating rates, keep the temperature 2.5 hours;Again with 5 DEG C/min Cooling rate cools to 780 DEG C, keeps the temperature 3 hours;It powers off, the cooled to room temperature in furnace can be obtained micro-crystalline ceramic Glass ingot.
(5) diamond wire multi-wire saw: the Dalian cutting machine model QPJ1660B/C(Liancheng in the present embodiment), diamond wire is straight Diameter is 200 microns, and according to product specification and processing request adjustment diamond wire slot pitch to 0.85 millimeter, above-mentioned glass ingot is cut At the mobile terminal glass back-cover substrate with a thickness of 0.60 millimeter, 1600 ms/min of cutting speed, process time is no more than 4 Hour.
The mobile terminal glass back-cover substrate finally obtained, average thickness are 0.601 millimeter.
Embodiment 6.
(1) raw material preparation: according to mass percentage meter, comprising: SiO2 60.0%、Na2O 5.0%、Al2O3 21.0%、 CaO 3.1%、MgO 4.2%、TiO2 0.8%、K2O 2.5%、ZrO2 3.0%、Ce2O30.4% etc..
(2) Raw material processing: purification, broken, crushing, ball milling, each raw material of screening, it is ensured that the partial size of each raw material is not more than 0.127 millimeter.
(3) preparation of batch: according to ingredient design in each raw material of mass percent precise, pass through V-type mixing Each raw material is sufficiently mixed by machine, obtains uniform batch.
(4) prepared by glass ingot: post forming and sintering process.
Mold inner-cavity is having a size of 330 millimeters * 75 millimeters * 150 millimeters.
Water quenching, broken, ball milling: batch is put into glass-melting furnace and is powered to smelting furnace, with 8 DEG C/min of heating speed Degree is warming up to 1000 DEG C, keeps the temperature 1.5 hours, then continues to be warming up to 1550 DEG C with 5 DEG C/min of heating rates, and heat preservation 2.5 is small When, form high-temperature glass liquid;High-temperature glass liquid is poured into the container for filling with clean clear water, formation water quenching glass particle, draining, It dries, be crushed, being milled to average grain diameter less than 0.072 millimeter, being prepared into glass fine powder.
High pressure pressed glass ingot blank: weighing nanometer Zirconia fiber according to mass percent 8.5%, will using V-type batch mixer Glass fine powder and ZrO2 fiber are sufficiently mixed uniformly, are subsequently placed in high-strength alloy mold, are suppressed and protect through 70MPa hydraulic press It presses 15 minutes, demoulding, glass ingot blank be made.
Burning glass ingot: glass ingot blank is placed in high temperature furnace, first continues to be warming up to 600 with 8 DEG C/min of heating rates DEG C, keep the temperature 1 hour;Then continue to be warming up to 1075 DEG C with 5 DEG C/min of heating rates, keep the temperature 3h;Cooled down again with 5 DEG C/min Speed cools to 780 DEG C, keeps the temperature 3 hours;It powers off, it is fiber reinforced to can be obtained ZrO2 for the cooled to room temperature in furnace Micro-crystalline ceramic glass ingot.
(5) diamond wire multi-wire saw: the Dalian cutting machine model QPJ1660B/C(Liancheng in the present embodiment), diamond wire is straight Diameter is 250 microns, and according to product specification and processing request adjustment diamond wire slot pitch to 0.65 millimeter, above-mentioned glass ingot is cut At the mobile terminal glass back-cover substrate with a thickness of 0.40 millimeter, 2000 ms/min of cutting speed, process time is no more than 5 Hour.
The mobile terminal glass back-cover substrate finally obtained, average thickness are 0.399 millimeter.
In the various embodiments described above, matches data and technological parameter is that pilot production obtains.It can be obtained by all embodiments Out, simple production process of the present invention, easy to operate, dimensional accuracy is high, high production efficiency, and qualification rate is high, and quality is stablized, cost It is low, can large-scale industrial production, be particularly suitable for production high-intensitive, high tenacity and more frivolous 5G mobile terminal glass back-cover base Piece.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by the application Claim point out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.

Claims (15)

1. a kind of mobile terminal glass back-cover substrate, which is characterized in that the constitutive material including following total weight percent: SiO2 40-60%、Na2O 0-5%、CaO 0-10%、Al2O315-35%,MgO 0-10%;And additive 5-45%.
2. mobile terminal glass back-cover substrate according to claim 1, which is characterized in that the additive includes TiO2、 ZrO2、K2O、B2O3、BaO、ZnO、Y2O3、Ce2O3And Li2One of O or a variety of, wherein each ingredient accounts for total weight percent such as Under: B2O3 0-15%、BaO 0-5%、ZnO 0-10%、Y2O3 0-5%、Ce2O3 0-5%、Li2O 0-5%、TiO2 0-5%、ZrO2 0- 5%、K2O 0-5%。
3. mobile terminal glass back-cover substrate according to claim 1, which is characterized in that further include ion coloring agent, institute The ion coloring agent stated includes Mn2O3、CoO、Co3O4、Cr2O3One or more of, ion coloring agent accounts for total weight percent 2-8%.
4. a kind of production method of mobile terminal glass back-cover substrate, which comprises the steps of:
(1) raw material of following weight percent, SiO raw material preparation: are weighed2 40-60%、Na2O 0-5%、CaO 0-10%、Al2O3 15-35%,MgO 0-10%;And additive 5-45%;
(2) Raw material processing: purifying gained raw material, be crushed, crushed, sieved, and obtained feed particles partial size is micro- 0.10 Rice~0.80 millimeter between;
(3) prepared by batch: the batch of uniformity mixed powder is ground and is mixed into as ball mill feed particles by obtained by, The partial size of batch is between 0.2 micron~0.1 millimeter after ball milling and screening;
(4) prepared by glass ingot: by broken crucible method, model casting or post forming and the glass of crystallite is made in batch by sintering process Glass ingot;
(5) diamond wire multi-wire saw: being cut into the glass substrate with a thickness of 0.08~2.0 millimeter for glass ingot by cutting machine, Cutting speed when cutting is 600~3000 ms/min, and cutting time is 10~900 minutes.
5. the production method of mobile terminal glass back-cover substrate according to claim 4, which is characterized in that the step (1) additive in includes TiO2、ZrO2、K2O、B2O3、BaO、ZnO、Y2O3、Ce2O3And Li2One of O or a variety of, wherein It is as follows that each ingredient accounts for total weight percent: B2O3 0-15%、BaO 0-5%、ZnO 0-10%、Y2O3 0-5%、Ce2O3 0-5%、 Li2O 0-5%、TiO2 0-5%、ZrO2 0-5%、K2O 0-5%。
6. the production method of mobile terminal glass back-cover substrate according to claim 4, which is characterized in that the step (1) raw material in further includes ion coloring agent, and ion coloring agent accounts for the 2-8% of total weight percent.
7. the production method of mobile terminal glass back-cover substrate according to claim 4, which is characterized in that the step (4) crucible method is broken in, and specific step is as follows:
Batch is put into mold resistant to high temperature and is smoothed out, is compacted, is placed in high temperature furnace together with mold, with 7-15 DEG C/minute The heating rate of clock is warming up to 400~1200 DEG C, keeps the temperature 0.5~1.5 hour, then continue to heat up with 2-7 DEG C/min of heating rate To 1000~2000 DEG C, 2~3 hours are kept the temperature;Glass metal is generated under high temperature action, glass metal is through abundant melting, deaeration, clarification It is cooling that high temperature furnace is removed with mold afterwards;It the molten mold for having glass metal and having cooled down is put into temperature has risen to 400~700 DEG C and move back In stove, annealing heat preservation 2~3 hours, then natural cooling, dismantles mold and obtains glass ingot.
8. the production method of mobile terminal glass back-cover substrate according to claim 6, which is characterized in that after annealing Mold transposition in crystallization temperature be that crystallization is completed in 700~1000 DEG C of crystallization furnace, after slow cooling to room temperature, dismantle mold Take out glass ingot.
9. the production method of mobile terminal glass back-cover substrate according to claim 4, which is characterized in that the step (4) specific step is as follows for model casting in:
Batch is put into glass-melting furnace, is warming up to 400~1200 DEG C with 7-15 DEG C/min of heating rate, heat preservation 1.5 is small When, then continue to be warming up to 1000~2000 DEG C with 2-7 DEG C/min of heating rate, 3 hours are kept the temperature, is generated under high temperature action equal Even and viscous glass metal;Then glass metal is poured into the preheated mold to 500~550 DEG C, it is cooling;Glass will be marked with Liquid and the mold cooled down are put into temperature and have risen in 400~700 DEG C of annealing furnace, annealing heat preservation 30~300 minutes, then from It is so cooling, it dismantles mold and obtains glass ingot.
10. the production method of mobile terminal glass back-cover substrate according to claim 8, which is characterized in that annealing Mold afterwards, which is placed in be preheated in the crystallization furnace that crystallization temperature is 700~900 DEG C, carries out Crystallizing treatment, crystallization time 60~600 Minute;Finally by certain temperature schedule slow cooling to room temperature, devitrified glass ingot is taken out in demoulding.
11. the production method of mobile terminal glass back-cover substrate according to claim 4, which is characterized in that the step (4) simultaneously specific step is as follows for sintering process for post forming in:
(A) water quenching, broken, ball milling: batch is put into glass-melting furnace and is powered, with 7-15 DEG C/min of heating rate liter Temperature keeps the temperature 1.5 hours to 400~1200 DEG C, then continues to be warming up to 1000~2000 DEG C with 2-7 DEG C/min of heating rate, heat preservation 2.5 hours, the glass metal of high temperature is formed under high temperature action;Glass metal is poured into the container for filling with clear water, water quenching glass is formed Particle, draining are dried, are crushed, being milled to average grain diameter less than 0.20 millimeter, are prepared into glass fine powder;
(B) high pressure pressed glass ingot blank: glass fine powder is placed in mold, through the compacting of 70MPa hydraulic press simultaneously pressure maintaining 15 minutes, is torn open Mould to obtain glass ingot blank;
(C) burning glass ingot: glass ingot blank is placed in high temperature furnace, first continues to be warming up to 600 with 7-15 DEG C/min of heating rate ~1200 DEG C, keep the temperature 0.5~1 hour;Then continue to be warming up to 1000~1400 DEG C with 2-7 DEG C/min of heating rate, heat preservation 2.5 hours, sinter porcelain into;500~1000 DEG C of thorough crystallization of crystallization temperature are cooled to 2-7 DEG C/min of cooling rate again, are kept the temperature 3 hours;Cooled to room temperature obtains glass ingot.
12. the production method of mobile terminal glass back-cover substrate according to claim 11, which is characterized in that the step (B) toughening material is added in, in glass fine powder and is placed in mold again after being sufficiently mixed uniformly suppresses, the weight of the toughening material Amount percentage is 5-25%.
13. the production method of mobile terminal glass back-cover substrate according to claim 12, which is characterized in that the increasing Tough material includes one of zirconia powder, Zirconium oxide fibre or whisker, silicon carbide fibre or whisker or a variety of.
14. according to the production method of mobile terminal glass back-cover substrate described in claim 7 to 13 any one, feature exists In the cavity length of mould therefor is 10~2000 millimeters, and intracavity section width is 10~300 millimeters, and intracavity section height is 50~500 millimeters.
15. according to the production method of mobile terminal glass back-cover substrate described in claim 7 to 13 any one, feature exists In the material of mold is aluminium oxide, graphite, silicon carbide or heat-resisting alloy steel.
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