WO2004106253A1 - 化学強化ガラスおよびその製造方法 - Google Patents
化学強化ガラスおよびその製造方法 Download PDFInfo
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- WO2004106253A1 WO2004106253A1 PCT/JP2004/007103 JP2004007103W WO2004106253A1 WO 2004106253 A1 WO2004106253 A1 WO 2004106253A1 JP 2004007103 W JP2004007103 W JP 2004007103W WO 2004106253 A1 WO2004106253 A1 WO 2004106253A1
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- Prior art keywords
- chemically strengthened
- strengthened glass
- glass
- stress
- ion exchange
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL 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
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL 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
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment 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
- C03C21/002—Treatment 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
Definitions
- the present invention relates to a chemically strengthened glass, particularly to a chemically strengthened glass useful in the field of electronic materials used for touch panels and the like, for automobiles and buildings, and to a method for producing the same.
- tempered glass is becoming thinner and its tempering degree is increasing. Since it is difficult to produce glass with a thickness of 3 mm or less, especially 2 mm or less, using the commonly used wind-cooling method, chemical strengthening is often used for glass of 2 mm or less. Chemically tempered glass also has the advantage that it can generally achieve higher strength than tempered glass produced by the air cooling method.
- the stress pattern formed inside the glass differs greatly between the chemically strengthened glass and the air-cooled tempered (physically strengthened) glass. is there. Since the air-cooled tempered glass utilizes the temperature difference and viscous flow between the glass surface layer and the inner layer, the outline of the stress pattern is a shape approximated by a quadratic curve, for example. On the other hand, since chemically strengthened glass uses, for example, ion exchange in the surface layer, it depends strictly on Fick's diffusion rule, but is often approximated by a straight line. Attempting to obtain a given surface compressive stress value with wind-cooled tempered glass necessarily increases the tensile stress in the inner layer.
- soda-lime glass uses many methods to replace atoms with a small ionic radius with atoms with a large ionic radius, and among them, many chemically strengthened glasses are immersed in a chemical strengthening treatment tank, a so-called immersion method. It is manufactured. That is, the glass is immersed in a high-temperature chemical strengthening treatment solution, for example, a potassium nitrate solution, and a sodium ion in the glass is replaced with a potassium ion in potassium nitrate to form a compressive stress layer on the surface. Further, as a chemical strengthening treatment liquid when glass contains lithium, sodium nitrate or a mixed salt of sodium nitrate and potassium nitrate is often used.
- a chemical strengthening treatment liquid when glass contains lithium, sodium nitrate or a mixed salt of sodium nitrate and potassium nitrate is often used.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-160932
- Patent Document 2 Japanese Patent Publication No. 59-37451
- Patent Document 3 JP-A-2000-344550
- Non-Patent Document l HMGarfinkel et al., The Glass Industry, 50 (1969), p.76. Summary of the Invention
- An object of the present invention is to provide a cutable chemically strengthened glass having a predetermined strength.
- Another object of the present invention is to provide a method for producing the chemically strengthened glass.
- a chemical stressed layer in which a compression stress layer is formed on a glass surface layer by ion exchange is provided.
- Chemically strengthened glass is characterized by having two types of compressive stress pattern A in the compressive stress layer, near the glass surface, and near the glass surface, and compressive stress pattern B on the inner layer side of the glass. Provided.
- the temperature of the immersion liquid after the immersion treatment for ion exchange is determined.
- the method for producing a chemically strengthened glass (first method) is also characterized in that the method is maintained in an environment at a temperature higher than 10 ° C.
- the temperature of the immersion liquid is determined after the first immersion treatment for ion exchange. And a second immersion treatment at a high temperature of not less than 20 ° C. and not more than 50 ° C. for not less than 10 minutes and not more than 60 minutes (second method).
- a chemically strengthened glass produced by the method of the third aspect.
- the chemically strengthened glass according to the first feature of the present invention can be manufactured by the above first or second method.
- FIG. 1 is a schematic diagram of a stress pattern shown in Example 1.
- FIG. 2 is a schematic diagram of a stress pattern shown in Example 2.
- FIG. 3 is a schematic view of a stress pattern shown in Comparative Example 1.
- FIG. 4 is a schematic view of a stress pattern shown in Comparative Example 2.
- FIG. 5 is a schematic diagram showing stress patterns of chemically strengthened glass and air-cooled (physical) strengthened glass.
- FIG. 6 is a schematic view showing a special example of a stress pattern A.
- the first feature of the present invention will be described in detail below. According to the first feature, a chemically strengthened glass capable of stably cutting is provided.
- the stress pattern A and the stress pattern B are each approximated by a linear function
- the stress pattern A and the stress pattern B are the above-mentioned chemically strengthened glass having different inclinations.
- the conventional chemically strengthened glass that does not have another stress pattern that is, only one type of conventional chemically strengthened glass has a large value of breaking strength, but has a problem that it is difficult to cut. On the other hand, if it is easy to cut, the breaking strength will decrease.
- the surface stress value obtained from the stress pattern A is obtained by setting the stress pattern B to the glass surface. This is a chemically strengthened glass whose value is smaller than the tentative surface stress value obtained from the line extended to. If the value is large, it will be cut off.
- the ratio of the surface stress value obtained from the stress pattern A to the temporary surface stress value obtained from the line obtained by extending the compressive stress pattern B to the glass surface is 0.8 or more and 0.95 or more.
- the chemically strengthened glass described above is as follows.
- the ratio to the temporary surface stress value obtained from the line that extends the stress pattern B to the glass surface is 0.8 or more and 0.95 or less. If it is less than 0.8, the surface compressive stress is reduced, and the strength of the glass is practically reduced.
- the ratio exceeds 0.95 the cutting property decreases. More preferably, it is 0.85 or more and 0.93 or less.
- the inclination of the stress pattern A may be opposite to that of the stress pattern B as shown in FIG.
- the surface compressive stress is always larger than the stress value of the inner layer, but in the chemically strengthened glass of the present invention, the stress value of the portion slightly entering the inner layer is larger than the surface compressive stress value. May be indicated.
- chemically strengthened glass having such a stress pattern falls within the scope of the present invention.
- the thickness of the compressive stress layer based on the stress pattern A is 2 ⁇ ⁇ ⁇ or more and 15 / m or less.
- the thickness of the compressive stress layer due to the stress pattern A is smaller than 2 ⁇ m, the effect on the cuttability is reduced, and when the thickness of the compressive stress layer due to the stress pattern A exceeds 15 ⁇ m, the glass is broken due to the properties of the tempered glass. The strength is substantially reduced. 3 ⁇ m or more and 9 ⁇ m or less are more preferable.
- the stress pattern in the chemically strengthened glass for simplifying the production control of the chemically strengthened glass has been described by first-order approximation. Strictly speaking, however, there are naturally cases where the stress pattern cannot be approximated by a linear function. This is because, as described above, ion exchange basically follows Fick's diffusion law, and the diffusion law is not a linear function, so it is strictly necessary to deviate from an approximated straight line. It is. In addition, stress generation in glass is affected by many factors such as temperature distribution, deformation, and plate thickness, in addition to ion exchange. If straight line approximation is not possible or difficult, approximation should return to the principle of whether the generated stress pattern requires more than one function that can be represented by a single function.
- the approximation has one pole or Use a function without poles.
- it is conventional chemically strengthened glass.
- it becomes the chemically strengthened glass of the present invention.
- the region where function approximation should be considered should be the compressive stress region. Since the cuttability and breaking strength of glass depend on the compressive stress value, and in the region where the tensile stress starts to be a constant value, the stress generation may become unstable, which may cause an error in the determination. is there.
- the thickness of the compressive stress layer and the value of the compressive stress of the chemically strengthened glass are greatly influenced by the processing temperature and the processing time during the chemical strengthening, as well as by the selection of the processing solution and its activation characteristics. Absent. Further, it differs depending on the ion exchange state and the crystallization state in the glass. However, it is possible to obtain chemically strengthened glass with improved breaking strength while maintaining the breaking strength at a practical level.
- the second feature of the present invention is described in detail below. According to this second feature, a method (first method) for producing chemically strengthened glass having strength and cuttability is provided.
- the first method it is extremely important to perform the treatment at a temperature higher than the temperature of the immersion liquid by 10 ° C or more after the immersion treatment in order to improve the cuttability of the chemically strengthened glass. At processing temperatures below 10 ° C, it may be difficult to improve cuttability.
- the immersion liquid is maintained at a temperature higher than the immersion liquid temperature by 10 ° C. to 50 ° C. for 10 minutes to 60 minutes. If the temperature is less than 10 ° C, the cutability of the chemically strengthened glass may decrease, and if the temperature exceeds 50 ° C, the strength of the chemically strengthened glass may decrease. Further, there may be a problem that the immersion liquid may be deteriorated. In some cases, the problem of deformation of chemically strengthened glass products also occurs. The reason why the duration is set to 10 minutes or more and 60 minutes or less is that if the duration is less than 10 minutes, the cutability of the chemically strengthened glass may decrease, and if the duration is more than 60 minutes, the strength of the chemically strengthened glass may decrease. Also, in some cases, the problem of deformation of the chemically strengthened glass product occurs.
- the temperature of the immersion liquid may be set to 450 ° C. or more and 510 ° C. or less. If the temperature is lower than 450 ° C, it may be difficult to improve the cutability of chemically strengthened glass, and production may take a long time, resulting in extremely poor productivity. If the temperature exceeds 510 ° C, a problem may occur that the strength of the chemically strengthened glass decreases. [0025] Further, for example, after the immersion treatment, the temperature may be maintained at a temperature higher than the immersion liquid temperature by 50 ° C to 150 ° C for 1 minute to 30 minutes.
- the cutability of the chemically strengthened glass may decrease, and if the temperature exceeds 150 ° C, the strength of the chemically strengthened glass may decrease. Further, there is a problem that the immersion liquid is deteriorated. In some cases, the problem of deformation of chemically strengthened glass products also arises. The reason why the duration is set to 1 minute or more and 30 minutes or less is that if it is less than 1 minute, the cutability of the chemically strengthened glass may decrease, and if it is 30 minutes or more, the strength of the chemically strengthened glass may decrease. Also, in some cases, the problem of deformation of chemically strengthened glass products may occur.
- the immersion liquid temperature may be 410 ° C or more and 500 ° C or less. Good.
- the third feature of the present invention will be described in detail below. According to the third feature, a method (second method) for stably producing a cutable chemically strengthened glass is provided.
- the temperature of the second immersion liquid is set to be higher than the temperature of the first immersion liquid by 20 ° C or more and 50 ° C or less. This is because the cuttability of the glass decreases, and at temperatures exceeding 50 ° C, the strength of the chemically strengthened glass obtained decreases. In addition, there is a problem that the ion exchange liquid may be deteriorated.
- the reason why the time of the second immersion treatment is set to 10 minutes or more and 60 minutes or less is that the cutability of the chemically strengthened glass obtained in less than 10 minutes is reduced, and that the glass obtained in 60 minutes or more is chemically reinforced. This is because the strength of the resin decreases.
- the first immersion treatment temperature may be set to 450 ° C or more and 510 ° C or less. If the temperature is lower than 450 ° C, the productivity of the chemically strengthened glass obtained may be extremely poor due to the time required to improve the cutability of the resulting chemically strengthened glass. If the temperature exceeds 510 ° C, there may be a problem that the strength of the obtained chemically strengthened glass decreases.
- the chemically strengthened glass produced by the first method and the second method is a chemically strengthened glass having both cuttability and strength.
- These chemically strengthened glasses may have the properties of the sword-shaped tempered glass according to the first aspect of the present invention.
- the chemically strengthened glass produced by the first method and the second method can be a chemically strengthened glass having a surface hardness of 560 to 590 kgf / cm 2 . Soda stone manufactured by conventional methods The surface hardness of ash-based chemically strengthened glass is said to be 590-610 kgf m 2 .
- the chemically strengthened glass obtained by the method according to the second aspect of the present invention has a surface hardness of 560 to 590 kgfm 2 . If it exceeds 590 kgf m 2 , it is the same as conventional chemically strengthened glass, and if the cutability is poor, it may not be possible to cut it. Even if it can be cut, it may deviate from the desired cutting line, and glass powder tends to occur frequently on the surface.
- the chemically strengthened glass of the present invention is characterized in that it has a strength similar to that of conventional chemically strengthened glass and also has a cutting property. This is because, unlike conventional chemically strengthened glass, the stress pattern does not depend only on Fick's law. Therefore, the surface hardness has characteristics that are slightly different from the hardness of conventional chemically strengthened glass.
- soda lime glass having a strain point of 470 ° C or more and 530 ° C or less may be subjected to ion exchange treatment.
- Soda-lime glass with a strain point lower than 470 ° C has low chemical durability and hardness, and thus its utility as chemically strengthened glass is greatly reduced.
- soda-lime glass with a strain point higher than 530 ° C decreases the cuttability of the glass and the chemical strengthening. Glasses other than soda-lime glass are expensive because of poor productivity, so their practicality is small even if they have cutting properties and strength.
- Examples 1-2, Examples 3-6, and Examples 7-9 illustrate the first, second, and third features of the present invention, respectively.
- a 0.7 mm thick soda-lime-based float glass is immersed in potassium nitrate molten salt at 460 ° C for 10 hours, subjected to ion exchange treatment, and then transferred to a cooling bath set at 510 ° C. And held therein for an additional 60 minutes. Thereafter, cooling was carried out at a usual cooling rate (about 10 ° C./min) to obtain a predetermined chemically strengthened glass.
- Figure 1 shows the stress pattern of this glass. In the figure, C indicates compressive stress and T indicates tensile stress. Thus, two types of compression stress pattern A, which is closer to the glass surface, and compression stress pattern B, which is closer to the glass inner layer, are used.
- This stress pattern shows the result of cutting and polishing a chemically strengthened glass and observing it using a Babinet compensator and an optical microscope.
- the ratio of the surface stress value obtained from the stress pattern A to the temporary surface stress value obtained from the line obtained by extending the compressive stress pattern B to the glass surface was 0.93.
- the thickness of the compressive stress layer according to the stress pattern A was 4 zm.
- This chemically strengthened glass was subjected to scribe (loading weight: 2 kg) and a cutting test in accordance with a general cutting operation using a commercially available carbide wheel tip.
- scribe loading weight: 2 kg
- cutting test in accordance with a general cutting operation using a commercially available carbide wheel tip.
- a 0.55 mm thick soda-lime-based float glass was immersed in a molten salt of potassium nitrate at 470 ° C for 4 hours to perform the first ion exchange treatment. After the ion exchange treatment, the sample was cooled at a normal cooling rate (about 10 ° C / min) to obtain a predetermined chemically strengthened glass.
- Figure 2 shows the stress pattern of this glass. The ratio of the surface stress value obtained from the stress pattern A to the temporary surface stress value obtained from the line extending the compressive stress pattern B to the glass surface was 0.89. The thickness of the compressive stress layer due to the stress pattern A was 5 ⁇ m.
- This chemically strengthened glass was subjected to scribe (loading weight: 2kg) and a cutting test in accordance with ordinary cutting work using a commercially available carbide wheel tip. Was.
- a 0.7 mm-thick soda-lime float glass was immersed in potassium nitrate molten salt at 460 ° C for 10 hours, subjected to ion exchange treatment, and then transferred to a cooling bath set at 380 ° C. Then, it was cooled at a normal cooling rate (about 10 ° C / min) to obtain a predetermined chemically strengthened glass product.
- Figure 3 shows the stress pattern of this glass. Thus, it has one type of stress pattern.
- the ratio of the surface stress value obtained from the stress pattern A to the temporary surface stress value obtained from the line extending the compressive stress pattern B to the glass surface was 1.0.
- the compressive stress layer thickness (stress patterns A and B) was 33 / im.
- the chemically strengthened glass was subjected to a scribe (loading weight: 2 kg) and a cutting test according to a general cutting operation using a commercially available carbide wheel tip. As a result, slip was remarkable. Therefore, when the cutting pressure was increased (final load weight: 7 kg) and examined, a large amount of scribed linear force and flaky glass powder was generated, and it could not be used as a chemically strengthened glass product. . In addition, there were some places that could not be cut along the scribe line, that is, some were off the cut line.
- a 0.7 mm-thick soda-lime-based float glass is immersed for 10 hours in a molten salt of potassium nitrate at 460 ° C for 10 hours, and then chemically strengthened glass is transferred to a cooling bath set at 550 ° C. And held therein for an additional 60 minutes. Thereafter, cooling was carried out at a usual cooling rate (about 10 ° C./min) to obtain a predetermined chemically strengthened glass.
- Figure 4 shows the stress pattern of this glass.
- the ratio of the surface stress value obtained from the stress pattern A to the provisional surface stress value obtained from the line extending the compressive stress pattern B to the glass surface was 0.7.
- the thickness of the compressive stress layer according to the stress pattern A was 17 / im.
- a scribe (loading weight: 2 kg) and a breaking test were performed on the chemically strengthened glass using a commercially available carbide wheel tip in accordance with a general cutting operation. As a result, slip was remarkable. Then, when the load weight was examined at 5 kg, this chemically strengthened glass was broken.
- Example 3_6 illustrates the second feature of the present invention.
- a 0.7 mm thick soda-lime-based float glass was immersed in a potassium nitrate molten salt at 460 ° C for 10 hours to perform an ion exchange treatment. Immediately after that, the tempered glass was moved to a cooling bath set at 510 ° C. and kept therein for 60 minutes. After that, it was cooled at the usual cooling rate (about 10 ° C / min) to obtain a predetermined chemically strengthened glass product. The surface hardness of the chemically strengthened glass product was 570 kgf m 2 .
- This chemically strengthened glass was prepared using a commercially available carbide wheel tip, which was suitable for general cutting work. After performing a shear scribe (load weight: 2 kg) and a cutting test, it was possible to cut without any problems.
- a soda-lime-based float glass having a thickness of 0.55 mm was placed in a potassium nitrate molten salt at 470 ° C.
- the chemically strengthened glass was subjected to a scribe (load weight: 2 kg) and a cutting test according to a general cutting operation using a commercially available carbide wheel tip, and as a result, the glass could be cut without any problem.
- a 0.7 mm thick soda-lime-based float glass was immersed in a potassium nitrate molten salt at 410 ° C for 24 hours to perform an ion exchange treatment. Immediately thereafter, the tempered glass was moved to a cooling bath set at 550 ° C., and was further kept therein for 3 minutes. Thereafter, cooling was performed at a normal cooling rate (about 10 ° C / min) to obtain a predetermined chemically strengthened glass product. The surface hardness of this chemically strengthened glass product was 585 kgf / cm 2 .
- This chemically strengthened glass was subjected to scribe (loading weight: 2 kg) and a cutting test in accordance with a general cutting operation using a commercially available carbide wheel tip.
- scribe loading weight: 2 kg
- cutting test in accordance with a general cutting operation using a commercially available carbide wheel tip.
- Soda-lime float glass with a thickness of 1mm was subjected to a 2 hour chemical strengthening treatment with potassium nitrate molten salt at 490 ° C, and then kept at 540 ° C for 2 minutes to obtain a predetermined chemically strengthened glass.
- the surface hardness of this chemically strengthened glass product was 585 kgf / cm 2 .
- the chemically strengthened glass was subjected to scribing (loading weight: 2kg) and a cutting test in accordance with a general cutting operation using a commercially available carbide wheel tip. As a result, slip was remarkable. Therefore, when the cutting pressure was increased (final load weight: 7 kg) and examined, many glass powders with scribed line force were generated and could not be used as chemically strengthened glass products. In addition, there were some places that could not be cut along the scribe line, that is, some were off the cut line.
- a soda-lime-based float glass having a thickness of 0.55 mm was placed in a potassium nitrate molten salt at 470 ° C.
- the chemically strengthened glass was subjected to scribing (loading weight: 2kg) and a cutting test in accordance with a general cutting operation using a commercially available carbide wheel tip. As a result, slip was remarkable. Therefore, when the cutting pressure was increased (final load weight: 5 kg), the chemically strengthened glass was broken.
- the chemically strengthened glass was subjected to scribing (loading weight: 2kg) and a cutting test in accordance with a general cutting operation using a commercially available carbide wheel tip. As a result, slip was remarkable. Therefore, the cutting pressure was increased (final load weight: 5 kg) and examined, but it was not possible to perform cutting along the cutting line. [0059] As shown from the results of Examples 3 to 6 above, by adding the step of the second feature of the present invention after the ion exchange step, it was possible to obtain a chemically strengthened glass that is easily cut. . The surface hardness of the glass was measured using a commercially available Vickers hardness tester (manufactured by Akashi Seisakusho) under a load of 50 g. As described above, the following Examples 7-9 illustrate the third feature of the present invention.
- a 0.7 mm thick soda-lime-based float glass is immersed in 460 ° C molten salt of potassium nitrate for 10 hours to perform the first chemical strengthening (ion exchange) treatment, and then a 510 ° C immersion liquid is used.
- a second ion exchange treatment immersion in molten potassium nitrate was performed at a temperature for 60 minutes.
- the chemically strengthened glass was moved to a cooling bath set at 500 ° C, and was further kept therein for 60 minutes. Thereafter, it was cooled at a usual cooling rate (about 10 ° C / min) to obtain a predetermined chemically strengthened glass product.
- the surface hardness of the chemically strengthened glass product was 565 kgf m 2 .
- the chemically strengthened glass was subjected to a scribe (loading weight: 2 kg) and a cutting test according to a general cutting operation using a commercially available carbide wheel tip. As a result, the glass was successfully cut.
- a 0.55mm thick soda-lime float glass was immersed in a potassium nitrate molten salt at 470 ° C for 4 hours to perform the first chemical strengthening (ion exchange) treatment, followed by a 510 ° C immersion liquid.
- a second ion exchange treatment immersion in molten potassium nitrate was performed at the temperature for 20 minutes.
- the chemically strengthened glass was moved to a cooling bath set at 500 ° C, where it was kept for 20 minutes. Thereafter, it was cooled at a usual cooling rate (about 10 ° C / min) to obtain a predetermined chemically strengthened glass product.
- the surface hardness of this chemically strengthened glass product was 580 kgf m 2 .
- the chemically strengthened glass was subjected to a scribe (loading weight: 2 kg) and a cutting test according to a general cutting operation using a commercially available carbide wheel tip. As a result, the glass was cut without any problem.
- Example 9 A 1 mm thick soda-lime float glass was immersed in a molten salt of potassium nitrate at 505 ° C for 1 hour to perform the first chemical strengthening (ion exchange) treatment. For a second ion exchange treatment (immersion in molten potassium nitrate) for 10 minutes. Immediately after that, the chemically strengthened glass was moved to a cooling bath set at 500 ° C, and kept therein for 3 minutes. After that, it was cooled at the usual cooling rate (about 10 ° C / min) to obtain the specified chemically strengthened glass product. The surface hardness of the chemically strengthened glass products, was filed in the m 2 N 585kgf.
- This chemically strengthened glass was subjected to scribing (loading weight: 2kg) and a cutting test in accordance with general cutting work using a commercially available carbide wheel tip. I felt it, but in the end I could cut it without any problems.
- a 0.7 mm thick soda-lime float glass was immersed in 460 ° C molten salt of potassium nitrate for 10 hours to perform a chemical strengthening (ion exchange) treatment. Tempered glass was manufactured.
- Soda-lime float glass with a thickness of 0.55mm was immersed in a molten salt of potassium nitrate at 470 ° C for 4 hours to perform chemical strengthening (ion exchange) treatment.
- the chemically tempered glass was scribed using a commercially available cemented carbide wheel tip and subjected to a test for cutting. As a result, slip was remarkable. Therefore, when the cutting pressure was increased, the chemically strengthened glass was broken.
- Aluminoborate glass having a thickness of 1.1 mm was immersed in a potassium nitrate molten salt at 460 ° C for 10 hours. Immediately after immersion and chemical strengthening (ion exchange) treatment, it was put into a cooling process to produce chemically strengthened glass.
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Applications Claiming Priority (6)
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JP2003-150001 | 2003-05-28 | ||
JP2003150000A JP4535692B2 (ja) | 2003-05-28 | 2003-05-28 | 化学強化ガラス |
JP2003150001A JP4289927B2 (ja) | 2003-05-28 | 2003-05-28 | 化学強化ガラスの製造方法 |
JP2003-150000 | 2003-05-28 | ||
JP2003160672A JP4289931B2 (ja) | 2003-06-05 | 2003-06-05 | 化学強化ガラスの製造方法 |
JP2003-160672 | 2003-06-05 |
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WO2004106253A8 WO2004106253A8 (ja) | 2005-09-22 |
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- 2004-05-25 WO PCT/JP2004/007103 patent/WO2004106253A1/ja active Application Filing
- 2004-05-25 KR KR1020057013832A patent/KR100792771B1/ko not_active IP Right Cessation
- 2004-05-28 TW TW093115363A patent/TWI276615B/zh not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
---|---|
KR20060024338A (ko) | 2006-03-16 |
WO2004106253A8 (ja) | 2005-09-22 |
TWI276615B (en) | 2007-03-21 |
TW200502187A (en) | 2005-01-16 |
KR100792771B1 (ko) | 2008-01-11 |
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