WO2011103798A1 - Chemically strengthened glass capable of subsequently cutting - Google Patents

Chemically strengthened glass capable of subsequently cutting Download PDF

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Publication number
WO2011103798A1
WO2011103798A1 PCT/CN2011/071155 CN2011071155W WO2011103798A1 WO 2011103798 A1 WO2011103798 A1 WO 2011103798A1 CN 2011071155 W CN2011071155 W CN 2011071155W WO 2011103798 A1 WO2011103798 A1 WO 2011103798A1
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Prior art keywords
glass
characterized
subsequent cutting
chemically toughened
less
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PCT/CN2011/071155
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French (fr)
Chinese (zh)
Inventor
王冲
乔斯·西默
巴塞尔·马蒂亚斯
Original Assignee
肖特玻璃科技(苏州)有限公司
尚光强
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Priority to CN201010126367XA priority Critical patent/CN102167509A/en
Priority to CN201010126367.X priority
Application filed by 肖特玻璃科技(苏州)有限公司, 尚光强 filed Critical 肖特玻璃科技(苏州)有限公司
Publication of WO2011103798A1 publication Critical patent/WO2011103798A1/en

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    • 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
    • C03C21/00Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
    • C03C21/001Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
    • C03C21/002Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
    • 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
    • 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
    • C03C3/093Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
    • 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
    • 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
    • C03C3/097Glass compositions containing silica with 40% to 90% silica, by weight containing phosphorus, niobium or tantalum

Abstract

A chemically strengthened glass capable of subsequently cutting is provided. The glass has a Young's modulus of 70-100GPa, a Knoop hardness of 500-800kg/mm2 (0.1/20, 100gf, 20s) and a CTE of 5.0-11.0×10-6/°C.

Description

BACKGROUND chemically toughened glass can be cut subsequent

The present invention relates to a thin glass can be cut after the chemical tempering. More specifically, the present invention relates to a high strength, high fracture toughness, high wear resistance of silicate glass, having the chemical properties of the steel, and can be laser cut after tempering. More particularly, the present invention relates to a glass screen can be used in electronic products, and other areas relates to high strength thin glass, and after chemical tempering, well subsequent laser cutting. Also, the present invention also relates to a method of chemical tempering of the silicate glass. Background technique

BACKGROUND Many require high-strength glass. The most typical method for improving the strength of glass is a glass surface treatment, such as etching. Another method is the introduction of permanent stresses in the glass, i.e., the well-known physical steel (steel or heat) and chemical tempering. Introducing physical steel permanent stresses through rapid cooling of the glass surface. Chemical tempering is a surface compressive stress produced by the exchange ions. Both methods are well known and widely used industry. The substrate glass for electronic applications safety glass, automotive glass, white goods, hard drives, monitors and the like. For touch screens, usually required after the cover glass is thin and reinforced to ensure both light and having scratch resistance. Since the thickness of limitation, the thin glass can not generate a sufficiently high cooling rate and temperature gradient in the thickness direction, it is difficult to physically tempered. Thin glass is generally less than 2mm thickness can not be physically tempered. Therefore, thin glass thickness of less than 2mm is usually used chemical tempering. Chemically toughened glass are well-known in the art, for example as described in patent 4206268 A1 both US 4,156,755 and DE. Glass after chemical tempering carried out as milling, cutting and other machining, there is a high failure rate, or simply can not be processed. This is because the higher the glass article during processing internal stresses cause cracking unpredictable. But in the special processing process, cutting a tempered glass can bring significant economic benefits. In special cases, the thin glass after cutting steel is very advantageous, because this large tempered glass sheet is then cut, thereby improving yields. The most commonly used method is glass cutting, cutter wheel such as mechanical cutting, laser cutting, or water jet. Laser cutting has no chipping, peeling easy and high quality advantages boundary. After laser cutting edge quality of a high subsequent processing can be omitted, a good surface quality can be improved boundary sexual glass scratch-resistant surface which does not require subsequent treatment. Therefore it is necessary to obtain this energy subsequent mechanical or laser-cut high-strength glass. Traditional glass cutting method using mechanical force cut open surface of the glass, the glass separating force is introduced to complete the cut. Using this method, it may remain on the glass edge micro cracks, peeling, the surface of the glass can be damaged, and the residual glass debris. Compared with the traditional mechanical cutting, cutter wheel such as a metal and diamond cutting, laser cutting its excellent cutting quality it is widely used in art glass cutting. For laser cutting, laser glass is introduced into a separate tension. CO 2 laser cutting to an example, a CO 2 laser may be theoretically completely absorbed more glass. CO 2 laser cutting, there are three principles. The first method, using a direct laser melting glass, glass separated. This time is much greater than the glass transition temperature to withstand point glass T g. The second method, pulsed laser heating of the glass a slight dot-like areas to a portion slightly larger than the temperature, T g, the glass removed in these regions of the glass breaking. The third method, the glass is heated to a temperature slightly below the T g, and then rapidly cooled. A fracture caused by the tension to separate the glass. Compared to traditional cutter wheel cutting, laser cutting a third edge defects can be improved by reducing the mechanical strength of the glass. In addition, the shape of laser cutting without cutting limits, no mechanical wear, not in contact with the article being machined so that the laser cutting almost no glass chips, it is suitable for use in a clean room. SUMMARY

The present invention relates to a cutting chemically toughened glass. Further, the glass is a silicate glass comprising an aluminosilicate glass, borosilicate glass and the like. The method is further cut by mechanical or laser cutting. The present invention provides a glass article, it is possible to laser cut after the chemical tempering. Further, the glass article may be a flat glass, further, the glass article may be a glass tube. Between the glass sheets having a thickness of 0.3-2.0 mm. The present invention also provides a method for steel, a steel of this method the glass is cut. Further, this glass is a silicate glass. Steel surface of the rear glass stress is less than 1200 MPa. Further, the glass surface of steel after a stress less than 900 MPa. Further, the glass surface of steel after a stress less than 800 MPa. Further, the center of the glass after the steel stress is less than 600 MPa. Center steel glass after stress is less than 60 MPao Further, the tempered glass stress center is less than 40 MPa. Further, the center of the glass is tempered after stress is less than 20 MPao Further, the tempered glass stress center is less than 15 MPa. After ion exchange reinforced glass layer depth of less than 50μπι. Further, the tempered glass layer depth of less than the ion exchange 30μηι. Further, the tempered glass layer depth of less than the ion exchange 20μπι. Further, the tempered glass layer depth of less than the ion exchange 15μηι. The thickness of the steel after ion exchange layer of glass and glass depth ratio is less than 0.08. Further, tempered glass after the ion-exchange ratio of the thickness of the glass layer depth of less than 0.05. Further, tempered glass after the ion-exchange ratio of the thickness of the glass layer depth of less than 0.03. Further, the tempered glass layer thickness of the ion exchange depth ratio is less than 0.02 and glass. Value after glass steel (ion-exchange layer surface of the depth of the compressive stress X ÷ glass thickness) should be less than 30. Further, tempered glass after (compressive stress layer depth X ion-exchanged glass surface ÷ thickness) value should be less than 20. Further, the tempered glass of the value (the thickness of the glass surface compression stress depth X + ion-exchange layer) should be less than 10. Further, tempered glass after (compressive stress layer depth X ion-exchanged glass surface ÷ thickness) value should be less than 5. The present invention further provides a method of chemically toughened glass cutting. Further, using this method (02 laser cutting. Further, the power CO 2 laser beam 50-1000 Watts. Further, a CO 2 laser beam power in the range of 60-800 watts. Beng step the power of the laser beam 02. further, the power CO 2 laser beam. further, the moving speed of the laser beam is 20-1500 mm / sec in the range of 80-300 watts in the range 80-500 watts. further, the moving speed of the laser beam is between 40-1200 mm / sec. further, the moving speed of the laser beam is between 60-800 mm / sec. further, the moving speed of the laser beam is 80-500 mm / between the second other methods such as laser cutting YAG:. Nd laser, green laser, etc., may be used in the present invention is chemically strengthened glass cutting BRIEF DESCRIPTION oF dRAWINGS.

View of a relationship between the surface compressive stress, tensile stress, stress layer depth and the thickness of the glass (surface compressive stress is fixed to 800 MPa).

Figure II, the laser cutting edges of the display picture chemically toughened glass. FIG three photographs show normal cutter wheel cutting edge of chemically toughened glass. DETAILED EMBODIMENT OF THE INVENTION

Chemical tempering process, a large radius salt bath by ion exchange of alkali metal ions to penetrate the network structure of the glass, the glass in the exchange of alkali metal ions smaller radius, to generate several tens of microns deep layer on the glass surface the compressive stress layer. Glass strength is intensified in the process. For such as smart phones, tablet computers, touch screen products protective cover glass, usually requires chemical tempering to improve its strength and scratch resistance. Different different chemically toughened glass, chemical tempering bath composition and exchange time, temperature and the like because of the type of glass, compressive stress range is 200-1500 MPa, the ion exchange depth in the range of 10-150 microns. To balance the surface compressive stress, tensile stress accumulated in the middle of the glass. Size and thickness of the tensile stress of the glass, and the surface compressive stress layer depth of ion exchange. Tensile stress range of chemically toughened glass as large as from several MPa 100 MPa. The traditional method of hard glass cutting the glass surface scratches or deep scratches in the glass is not sufficient to cut open. As long as the ion exchange depth greater than a certain limit, even when the surface scratches produced, since the ion exchange layer is not designated through, an externally applied tensile stress is not concentrated on the edge scratches, which makes the glass block can not be broken along the scribe, the rupture random occurrence. Laser cutting by heating the glass surface compression stress layer can be easily penetrate. After heating and cooling of the previous process, the glass surface stress relaxation, tensile stress and cracks formed in the center to extend under stress layer. The crack extension and continued throughout the central tensile stress of the glass layer. If the compressive stress below the compressive stress layer is not particularly large, laser cutting, the energy released is sufficient to separate the other surface of the compressive stress layer. The above glass may be sheet glass article. Flat glass thickness in the range 0.1-10 mm, preferably in the range of 0.1-5 mm, more preferably in the range of 0.3-3 mm, the optimum range of size of 0.3-2 mm 0 tempered glass may be greater than 50cm 2, may be greater than 100cm 2, may be larger than 1000cm 2, it may be larger than 2000cm 2. The size of the glass may also be less than 50cm 2. Surprisingly, the surface stress of the tempered glass having a thickness of cut adjustment, and the central exchange tensile stress layer depth can be obtained in high yield glass cutting, the glass while maintaining a high breaking strength. Ion exchange process must be strictly controlled to obtain the corresponding cutting performance. Temperature, bath time and ingredients are the most important parameters. The front surface of the chemical tempering treatment such as etching or the like can further improve the strength. Important parameter glass cutting properties include Young's modulus and hardness. Moreover, laser cutting is also important for the coefficient of thermal expansion CTE. Young's Modulus reflects the stiffness of glass, which is preferably in the range 70-100 MPa, more preferably in the range of 70-90 MPa, the optimal range of 70-85 MPa = Knoop hardness of glass (0.1 / 20, 100 grams, 20 seconds) is preferably in the range

500-800Kg / mm 2, more preferably in the range of 550-750 Kg / mm 2, the optimal range of 550-700 Kg / mm 2.

CTE is the most important parameters of the heating and cooling glass with tensile stress generated in the process. Large glass CTE greater tensile stress in the cutting process, the glass is cut more easily. However, if too large would cause CTE glass easily broken by thermal shock generated during the cutting and uncontrollable chemical tempering process. To meet these requirements, a preferred CTE range for glass 5.0-11.0xlO- 6 / ° C, more preferably in the range of 5.0-10.0xlO '6 / ° C, the optimal range of 5.0-9.0xlO- 6 / ° C. Mechanical properties after chemical tempering glass article from the glass surface compressive stress (CS), the central tensile stress (CT) and ion-exchange layer depth (DoL) is defined. High surface stresses may produce high breaking strength, higher center of gravity increase the risk of glass breaking, the ion exchange layer reflects the depth of the scratch resistance of glass. Chemical tempering may increase the fracture strength of the glass, increases scratch resistance and surface hardness of the glass, so using conventional glass processing method and apparatus for cutting hard glass. Obtained by ion exchange layer has a specific depth, chemically toughened glass surface stress and tensile stress of the center, so that the glass can be cut. The lower the center of the more favorable tensile stress of tempered glass cutting. Central tensile stress should be lower than 60 MPa, better less than 40 MPa, more preferably less than 20 MPa, preferably below 15 MPa. Chemically toughened glass surface compressive stress should be lower than 1200 MPa, better less than 900 MPa, preferably less than 800 MPa, preferably less than 600 MPao ion exchange depth in the range of 0-50 microns, preferably in the range 0 to 30 microns, more preferably in the range of 0-20 microns, the optimum range of 0-15 microns. Since the central tension is determined by the depth of the ion exchange layer, a surface compressive stress and the thickness of the glass; Further, chemically toughened glass must also meet the depth and thickness of the ion-exchange ratio is less than 0.08 of the glass, more than 0.05, preferably below 0.03 , preferably less than 0.02. Further, the laser cutting can be chemically toughened thickness must be met, and the ion-exchange surface compressive stress layer depth range of conditions such as:

Value (the depth of the ion exchange layer a surface compressive stress X ÷ glass thickness) should be less than 30, better less than 20, preferably less than 10, preferably less than 5. For example shown in Figure 1, compressive stress in the surface of the fixing at 800 MPa, the glass of different thicknesses central tensile stress variation with depth of the ion-exchange as shown in FIG. If required central tensile stress layer is equal to 40 MPa, the ion exchange layer should be depth: 0.3mm glass about 15μηι, 0.5mm glass about 25μπι, 0.7mm glass about 35μιη, 1.0mm glass about 50μπι. They had to be chemically tempered glass for a CO 2 laser cutting. CO 2 laser beam power in the range of 50-1000 watt, optimized power CO 2 laser beam is in the range of 60-800 watts, more preferably a CO 2 laser beam power is in the range of 80-500 watts, optimal power CO 2 laser beam is in the range of 80-300 watts. Further, the moving speed of the laser beam is between 20-1500 mm / sec, the moving speed of the optimization of the laser beam is between 40-1200 mm / sec, and more preferably the laser beam moving speed is 60-800 mm / seconds between the moving speed of the laser beam is optimal

80-500 mm / sec between. Sodium aluminum silicate glass containing Na + ions, is typically capable of chemically tempered glass. Such a thermal expansion coefficient between the glass 4-15ppm. Between ion + Na + o K exchange for KNO 3 salt bath. Treated glass is generally salt bath temperature of 390-460 ° C in 8 hours. Glass thus treated ion exchange between 10-120 microns in depth. Shorter processing times and lower processing temperatures more conducive to laser cutting. In one particular embodiment, the salt bath temperature in the range of 380~440 ° C, the better for 380 ~ 420 ° C, preferably at 380~400 ° C. Treatment time of 1 to 4 hours, more preferably 1~3 hours, preferably 1 to 2 hours. Lithium aluminosilicate glass is aluminosilicate glass containing Li 2 0 is. Because this means that Li 2 O-containing glass can be treated with NaNO 3 bath, and because the Li + → Na + diffusion rate quickly in a salt bath, and thus have fast ion exchange speed. NaN0 3 compressive surface treated glass is generally lower than the glass KNO 3 treatment, but the depth of the ion exchange layer can easily be achieved

100 microns. Ion exchange so deep depth, such that the glass can not be cut. But the cut glass may be achieved by controlling the steel chemistry conditions. Toughened with time and temperature of NaNO 3 were: 1-60 min, 1-30 min, and most preferably 1 to 15 minutes at a temperature of 360-390 ° C, more preferably 360-380 ° C, most good to 360-370 ° C. Further, if the processing of such glass KNO 3, because Li + ^ K + lower diffusion speed, the ion exchange depth is very small, i.e.,

5-20 microns, the glass thus treated can be laser cut. Borosilicate glass containing a certain amount of B 2 O 3 as the glass network structure. Such glass tend to have a low coefficient of thermal expansion. Because the presence of B 2 O 3, the glass network structure more compact compared to ordinary silicate glass. Structure results in a dense alkali metal ions exchanged into the glass structure velocity is relatively slow, the ion exchange depth is not deep. Thus, after the chemical tempering, the glass may be laser cut. Optimization of chemical tempering temperature range is

390-500 ° C, more preferably in the range of 400-490 ° C, the optimal range of 420-480 ° C, while the optimized tempering time range from 1 to 30 hours, more preferably in the range of 1 to 20 hours, most preferably in the range 15 hours. Still further, the depth of ion exchange layer should be less than 15, 20, 30, 50 microns, but the breaking strength should be increased by at least 100% more than non-tempered glass. Still further, the glass component may be added to other elements to increase the absorption of laser light, the laser wavelength may be ultraviolet UV, visible and infrared (IR) band VIS. Usually but not necessarily adding rare earth elements such as cerium. Related glass composition range as follows:

Sodium aluminum silicate glass, comprising the following components to the total weight of the glass composition, content of each component is (wt%):

Figure imgf000011_0001

Na 2 O 2-17%,

K 2 O 2-10%;

Na 2 O + K 2 O 5-25 %;

Α1 2 Ο 3 2-20%;

B 2 O 3 0-15%;

MgO 0-10%;

ZnO 0-5%;

ZrO 2 0-5%;

CaO 0-5%; preferably component concentration (wt%):

SiO 2 58-65%;

Na 2 O 10-15%, K 2 O 2-6%;

Na 2 O + K 2 O 13-20 %;

Al 2 O 3 12-18%;

B 2 O 3 0-5%;

MgO 0-6%;

ZnO 0-2%;

ZrO 2 0-4%;

CaO 0-5%; amount may be added as refining agents in general, without limitation. For example: arsenic oxide, antimony oxide, tin oxide, chloride, sulfide and the like. Lithium aluminum silicate glass, comprising the following components to the total weight of the glass composition, content of each component is (wt%):

SiO 2 55-70%;

Na 2 O 0-10%;

Ll 2 W l - L "/ o;

K 2 O 0-10%;

Li 2 O + Na 2 O 2-20 %;

AI2O3 2-25%;

B 2 O 3 0-15%;

P 2 O 5 0-5%;

ZnO 0-5%;

ZrO 2 0-5%;

The preferred composition range is:

SiO 2 60-70%;

Na 2 O 0-10%;

Li 2 O 3-10%;

K 2 O 0-2%;

Li 2 O + Na 2 O 4-16 %; Al 2 O 3 10-20%;

B 2 O 3 0-6%;

P 2 O 5 0-3%;

ZnO 0-2%;

ZrO 2 0-5%; amount may be added as refining agents in general, without limitation. For example: arsenic oxide, antimony oxide, tin oxide, chloride, sulfide and the like. Borosilicate glass, comprising the following components to the total weight of the glass composition, content of each component is (wt%):

SiO 2 55-85%;

Na 2 O 0-20%;

K 2 O 0-15%;

Β 2 Ο 3 0.5-20%;

Α1 2 Ο 3 0-10%;

TiO 2 0~8%;

ZnO 0 ~ 10%.

The preferred composition range is:

SiO 2 60-83%;

Na 2 O 0-10%;

K 2 0 0-10%;

Β 2 Ο 3 2-16%;

Α1 2 Ο 3 0-8%;

TiO 2 0~6%;

ZnO 0 ~ 8%. Typical amounts may be added as a refining agent of, without limitation. For example, arsenic oxide, antimony oxide, tin oxide, chloride, sulfide. Soda lime glass, comprising the following components to the total weight of the glass composition, content of each component is (wt%):

SiO 2 60-80%;

Na 2 O 1-20%;

K 2 O 0-5%;

CaO 0.5-20%;

MgO 0-15%;

Al 2 O 3 0~10%.

The preferred composition range is:

SiO 2 60-80%;

Na 2 O 8-16%;

K 2 O 0-4%;

CaO 4-15%;

MgO 2-6%;

AI2O3 0~5%. Typical amounts may be added as a refining agent of, without limitation. For example, arsenic oxide, antimony oxide, tin oxide, chloride, sulfide. The above glass component, each may comprise CeO 2 0-l%. In the following examples, all component amounts calculated in weight percent, unless otherwise specified. To achieve good cutting effect, the experiment is necessary to control the size of the surface compressive stress of the fiberglass, the central tensile stress, and the stress layer depth and other parameters. KNO 3 for tempering glass, the depth and magnitude of the stress can be measured FSM6000. Lithium aluminosilicate glass, especially in the case of steel NaN0 3, FSM6000 not surface compressive stress measured and the stress layer depth, it can be used a polarizing microscope, measured using the principle of stress birefringence. Example a

The main component of glass is SiO 2 63%, Α1 2 Ο 3 16%, Na 2 O 13%, K 2 O 3.55%, MgO 3.95%, the balance being SnO 2. First, the component according to the examples given in Table 1, the embodiment corresponding starting materials compounded, at 1600-1640 ° C to melt the raw material and incubated for 5~15 hours by a platinum crucible, then clarified at 1640-1660 ° C, followed by cooled to about 1600 ° C. The platinum crucible was removed from the high temperature furnace, the glass melt was poured in cold stainless steel mold, to obtain the size of the block is substantially of glass 50x50x40mm. Then the annealed glass with a stainless steel mold into an annealing furnace of about 600 ° C in 2~8 hours. The annealed glass was polished finish, and then cutting, milling, and then finely planed to the desired sample size, i.e. 40x40x0.7mm. The polished surface roughness of 1 nm or less. And a transition point of the thermal expansion coefficient was measured by the following method. I.e., measured by dilatometer. Samples processed into a cylinder having a diameter of 5mm. To record length change amount 20 to 300 ° C, thereby calculating the linear expansion coefficient. In the vicinity of the glass transition point, the linear expansion coefficient of the glass obvious mutations to obtain a glass transition point by extrapolation. Glass density measured by Archimedes' principle. The sample was placed in a glass container filled with water and the accurate measurement of the volume change of the water in the container, thereby to obtain a volume of the sample. By weight can be accurately measured using the sample divided by the volume, the density data will be obtained. The samples were chemically polished steel. Tempering is performed by a small lab scale bath furnace (diameter 250x250mm, depth 400mm). The sample is placed in a special corrosion-resistant stainless steel sample holder. After 390 KNO 3 salt bath. C, 2 hours after the ion exchange treatment was measured, the surface stress of 820 Mpa, center stress 20 Mpa, and stress layer depth 20μηι. Using a CO 2 laser cutting, laser power is 150W, the laser beam moving speed of 100mm / sec, the glass can be smoothly cut apart. Good edge quality. Second Embodiment

Glass samples were prepared with the same manner as in Example a. Glass sample thickness 0.7mm. Chemical tempering carried out at 440 ° C pure KNO 3 bath for 6 hours. Surface stress 700Mpa, center stress 45Mpa, and stress layer depth 40μιη. Use of C0 2 laser cutting, the laser beam power is adjusted and the movement speed, glass can not be successfully cut apart. This is because the stress layer depth and a central tensile stress is too large. Fifth Embodiment

Glass samples were prepared with the same manner as in Example a. Glass sample thickness 1.0 mm. Chemical tempering carried out at 390 ° C pure KNO 3 salt bath for 8 hours. Surface stress 1000 Mpa, center stress 10 Mpa, and stress layer depth 10μιη. Using a CO 2 laser cutting, laser power is 100W, the laser beam moving speed of 180mm / sec, the glass can be smoothly cut apart. Good edge quality. FIG visible quality glass edge two. Meanwhile, the conventional glass cutting knife wheel this may be glass cutting table, shown in Figure III. But the edge of a large number of small gaps, not large-scale production. Seventh Embodiment

Glass samples were prepared with the same manner as in Example a. Glass sample thickness 0.5 mm. Chemical tempering carried out at 380 ° C pure NaNO 3 salt bath for 10 minutes. Surface stress 650 Mpa, center stress 10 Mpa, and stress layer depth 14μιη. Use of C0 2 laser cutting, laser power is 100W, the laser beam moving speed of 200mm / sec, the glass can be smoothly cut apart. Good edge quality. Embodiment 10 Embodiment

Glass samples were prepared with the same manner as in Example a. Sample thickness 0.3mm. Chemical tempering carried out at 420 ° C pure KNO 3 salt bath for 3 hours. Surface stress 500 Mpa, center stress 14 Mpa, and a stress layer depth 8μιη. Using a CO 2 laser cutting, laser power is 100W, the laser beam moving speed of 200mm / sec, the glass can be smoothly cut apart. Good edge quality. Example eleven

Bian glass sample was prepared in the same manner with the same embodiment of an embodiment. Sample thickness 1.0mm. Chemical tempering carried out at 460 ° C pure KNO 3 salt bath for 8 hours. Surface stress 300 Mpa, center stress 5 Mpa, and stress layer depth 16μπι. Using a CO 2 laser cutting, laser power is 120W, the laser beam moving speed of 150mm / sec, the glass can be smoothly cut apart. Good edge quality. Applications include a display, the window glass consumer electronics and optical devices. The cutting method may be any method of cutting, but is preferably laser cut, such as CO 2, Nd-YAG laser or a femtosecond laser. And water may also be a mechanical cutter wheel cutting knife. Example

Figure imgf000018_0001

Claims

Rights request
A subsequent cutting can be chemically tempered glass, wherein the glass has a Young's modulus of 70-100 MPa, Knoop hardness of glass (0.1 / 20, 100 grams, 20 seconds) of
CTE 500-800Kg / mm 2, and the glass is 5.0-11.0 xl (T 6 /.C.
2. As can according to claim 1 for subsequent cutting chemically toughened glass, characterized in that the Young's modulus of 70-90 MPa.
3. The can of claim 1 subsequent cutting chemically toughened glass, characterized in that the Young's modulus of 70-85 MPao
4. The can of claim 1 subsequent cutting chemically toughened glass, wherein the glass Knoop hardness of 550-750 Kg / mm 2
5. The can of claim 1 subsequent cutting chemically toughened glass, wherein the glass Knoop hardness of 550-700 Kg / mm 2.
6. The can of claim 1 as subsequent cutting chemically toughened glass, wherein the glass has a CTE of 5.0-10.0 xlO- 6 / ° C o
7 can of claim 1 subsequent cutting chemically toughened glass, wherein the glass has a CTE of 6.0-9.5 x lO- 6 / ° Co
As claimed in any of the preceding claims capable of subsequent cutting chemically toughened glass, the glass is tempered glass is one of the following:
1) The glass is a sodium aluminum silicate glass, comprising the following components to the total weight of the glass composition, content of each component is (wt%):
SiO 2 55-70%; Na 2 0 2-17%; K 2 O 2-10%; Na 2 O + K 2 O 5-25%; Α1 2 Ο 3 2-20%; B 2 O 3 0- 15%; MgO 0-10%; ZnO 0-5%; ZrO 2 0-5%; CaO 0-5%;
2) The glass is a lithium alumino silicate glass, comprising the following components to the total weight of the glass composition, content of each component is (wt%):
SiO 2 55-70%; Na 2 O 0-10%; Li 2 O 1-15%; K 2 O 0-10%; Li 2 O + Na 2 O 2-20%; Α1 2 Ο 3 2-25 %; Β 2 Ο 3 0-15% ; Ρ 2 Ο 5 0-5% ;; ΖηΟ 0-5%; ZrO 2 0-5%;
3) The glass is a borosilicate glass, comprising the following components to the total weight of the glass composition, content of each component is (wt%):
SiO 2 55-85%; Na 2 O 0-20%; K 2 O 0-15%; Β 2 Ο 3 0.5-20%; Α1 2 Ο 3 0-10%; TiO 2 0~8%; ΖηΟ 0 ~ 10%; or
4) The glass is a soda-lime glass, comprising the following components to the total weight of the glass composition, content of each component is (wt%):
Si0 2 60-80%; Na 2 0 1-20%; K 2 O 0-5%; CaO 0.5-20%; MgO 0-15%; AI O3 0 ~ 10%.
As claimed in claim 9 capable of subsequent chemical cleavage of the glass 8, in glass having the following preferred composition:
1) The glass is a sodium aluminum silicate glass, comprising the following components to the total weight of the glass composition, content of each component is (wt%):
SiO 2 58-65%; Na 2 O 10-15%; K 2 O 2-6%; Na 2 O + K 2 O 13-20%; Α1 2 Ο 3 12-18%; B 2 O 3 0- 5%; MgO 0-6%; ZnO 0-2%; ZrO 2 0-4%; CaO 0-5%;
2) The glass is a lithium alumino silicate glass, comprising the following components to the total weight of the glass composition, content of each component is (wt%):
SiO 2 60-70%; Na 2 O 0-10%; Li 2 O 3-10%; K 2 O 0-2%; Li 2 O + Na 2 O 4-16%; Α1 2 Ο 3 10-20 %; Β 2 Ο 3 0-6% ; Ρ 2 Ο 5 0-3%; ΖηΟ 0-2%; ZrO 2 0-5%; 3) the glass is a borosilicate glass, comprising the following components, in order to total weight of the glass composition, content of each component is (wt%):
SiO 2 60-83%; Na 2 0 0-10%; K 2 O 0-10%; Β 2 Ο 3 2-16%; Α1 2 Ο 3 0-8%; TiO 2 0~6%; ZnO 0 -8%; or
4) The glass is a soda-lime glass, comprising the following components to the total weight of the glass composition, content of each component is (wt%): SiO 2 60-80 %; Na 2 0 8-16%; K 2 O 0-4%; CaO 4-15% ; MgO 2-6%; Al 2 O 3 0 ~ 5%.
Chemically toughened glass 10. As can be claimed in claim 8 or 9, subsequent cutting, further comprising 0-1 wt% of CeO 2.
According to any of the preceding claims capable of subsequent cutting chemically toughened glass, characterized in that the surface compressive stress is less than 1200MPa.
Subsequent cutting can chemically toughened glass 11, characterized in that the surface compressive stress of less than 900MPa 12. Claim.
13. The can of claim 12 for subsequent cutting chemically toughened glass, characterized in that the surface compressive stress of less than 800MPa.
Subsequent cutting can chemically toughened glass 13, characterized in that the surface compressive stress of less than 600MPa 14. Claim.
15. any of the preceding claims capable of subsequent cutting chemically toughened glass, characterized in that the central tensile stress is less than 60MPa.
16. The can of claim 15 for subsequent cutting chemically toughened glass, characterized in that the central tensile stress is less than 40MPa.
17. The can of claim 16 for subsequent cutting chemically toughened glass, characterized in that the central tensile stress is less than 20MPa.
18. The can of claim 17 for subsequent cutting chemically toughened glass, characterized in that the central tensile stress is less than 15MPa.
19. A according to any of the preceding claims capable of subsequent cutting chemically toughened glass, characterized in that the ion-exchange layer depth is less than 50μπι.
19 can be performed subsequent cutting chemically toughened glass, characterized in that the depth is less than the ion exchange layer is as claimed in claim 30μπι 20..
21. The can of claim 20 for subsequent cutting chemically toughened glass, characterized in that the ion-exchange layer depth is less than 20μπι.
Claim 22. The cutting can be performed subsequent chemically toughened glass 21, characterized in that the ion-exchange layer depth is less than 15μιη.
23. A according to any of the preceding claims capable of subsequent cutting chemically toughened glass, characterized in that the thickness of the glass layer and the ion exchange depth ratio is less than 0.08.
24. The method of claim 23 can be performed subsequent cutting chemically toughened glass, characterized in that the thickness of the glass layer and the ion exchange depth ratio is less than 0.05.
25. The can of claim 24 for subsequent cutting chemically toughened glass, characterized in that the thickness of the glass layer and the ion exchange depth ratio is less than 0.03.
26. The can of claim 25 for subsequent cutting chemically toughened glass, characterized in that the thickness of the glass layer and the ion exchange depth ratio is less than 0.02.
27. The according to any of the preceding claims capable of subsequent cutting chemically toughened glass, characterized in that (ion-exchange layer depth of a surface compressive stress X ÷ glass thickness) is less than 30.
28. The can of claim 27 for subsequent cutting chemically toughened glass, characterized in that (ion-exchange layer depth of a surface compressive stress X ÷ glass thickness) is less than 20.
29. The can of claim 28 for subsequent cutting chemically toughened glass, characterized in that (ion-exchange layer depth of a surface compressive stress X ÷ glass thickness) is less than 10.
30. The can of claim 29 for subsequent cutting chemically toughened glass, characterized in that (ion-exchange layer depth of a surface compressive stress X ÷ glass thickness) is less than 5.
31. any of the preceding claims capable of subsequent cutting chemically toughened glass, characterized in that it can be laser cut after the chemical tempering.
32. The can according to claim 31 for subsequent cutting chemically toughened glass, characterized in that the laser cutting is <02 lasers, YAG: Nd laser cutting, a green laser.
33. The can of claim 32 for subsequent cutting chemically toughened glass, characterized in that a CO 2 laser beam power of 50-1000 Watts.
34. The can of claim 32 for subsequent cutting chemically toughened glass, characterized in that the moving speed of the laser beam is 20-1500 mm / sec.
35. any one of the preceding claims capable of subsequent cutting chemically toughened glass, characterized in that the thickness of the glass sheet 0.3-2.0 mm.
36. A subsequent cutting can chemically toughened glass article, wherein the Young's modulus of the glass article is 70-100 MPa, Knoop hardness of the glass article (0.1 / 20, 100 grams for 20 seconds) to 500 800Kg / mm 2, and the glass article has a CTE of 5.0-11.0 xlO '6 / ° C.
37. The glass article according to claim 36, wherein said glass article is a glass or flat glass.
PCT/CN2011/071155 2010-02-26 2011-02-22 Chemically strengthened glass capable of subsequently cutting WO2011103798A1 (en)

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