CN101337770A - High strength aluminosilicate glass and chemically toughening process thereof - Google Patents
High strength aluminosilicate glass and chemically toughening process thereof Download PDFInfo
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- CN101337770A CN101337770A CNA2008101474423A CN200810147442A CN101337770A CN 101337770 A CN101337770 A CN 101337770A CN A2008101474423 A CNA2008101474423 A CN A2008101474423A CN 200810147442 A CN200810147442 A CN 200810147442A CN 101337770 A CN101337770 A CN 101337770A
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Abstract
The invention relates to a high-strength aluminate silicate glass and a chemical toughening method thereof, and belongs to the silicate glass field. The glass comprises the following chemical components (weight percent): 55 to 65 weight percent of SiO2, 0.1 to 3 weight percent of B2O3, 6 to 24 weight percent of Al2O3, 3 to 9 weight percent of MgO plus CaO plus BaO plus SrO, 0 to 1 weight percent of ZrO2, 0 to 2 weight percent of ZnO, 0.1 to 0.5 weight percent of Cl2, 0.1 to 1.0 weight percent of Sb2O3, 0.1 to 0.5 weight percent of SO3 and 0.1 to 0.5 weight percent of F2, and belongs to a aluminate silicate glass system. The high-strength aluminate silicate glass is prepared through a known plate glass production method, and then is subjected to the strengthening treatment by adopting the chemical toughening method. The glass has high permeability of visible light, and relatively common soda lime glass, neutral medicine glass and alkali-free high-aluminum glass have good shock resistance property, high scratch resistance property and high durability. The high-strength aluminate silicate glass is applied to the screen surface protection of plasma display products and liquid crystal display products, the protection of touch screens, the screen protection of automated teller machines, and the screen protection of other electronic products (Mobile phones, PDAs and media machines, etc.), thereby effectively preventing the impact and the scratch damage to the glass surface of display products. The high-strength aluminate silicate glass contains no harmful elements.
Description
Technical field
The present invention relates to electronics and show the gathering window high strength glass material of the screen surface protection of product (plasma shows product and liquid crystal display product) with glass material, building fireproof and theftproof door glass material, bank and hospital.Can be used for plasm TV, LCD TV, liquid-crystal display, notebook liquid-crystal display, Cash Machine protection screen, touch-screen, mobile phone, PDA, PSP, information inquiry machine, media advertisement player; can prevent to show the impact of product screen surface effectively and scratch infringement; increase the service life and result of use, ensure the safety of building and POS.
Background technology
Along with the development of modern science and technology, nearest 10 years electronics show that product obtains swift and violent development, and advanced flat panel display product emerges in an endless stream, show product and liquid crystal display product such as plasma, size is ascending, and is little of mobile phone, PDA product, arrives TV and billboard medium machine greatly.
Above-mentioned electronics shows that product comprises plasm TV, LCD TV, liquid-crystal display, notebook liquid-crystal display, Cash Machine protection screen, touch-screen, mobile phone, PDA, PSP, information inquiry machine, media advertisement player etc.; though these show the surface of products all have glass material as its imaging system key component, such glass does not carry out glass reinforced processing.The producer who shows product simultaneously; also realize and consider the protection problem of screen, placed one deck cover sheet on the surface, such material is mainly based on organic plates and soda-lime glass; but the hardness of these products and physical strength are not high, and surface scratch resistance and shock resistance all are not fine.And some electronics shows that product is to use as public product; running into various abominable environments for use (sharp-pointed article delineation) and artificial destruction (impact, impelling article) through regular meeting influences, such as Cash Machine protection screen, information inquiry machine, media advertisement player.In addition, touch-screen, PDA, mobile phone often have finger, electronic stylus, signature pen even key and write on display screen, delineate and risky operation such as impact.Electronics shows that breakage and surface irregularity often appear in the product display screen, influence the work-ing life and the screen display effect of complete machine like this.
Therefore a kind of electronics of the invention shows the shatter proof glass of product protection glass material and building and POS; its glass composition is more suitable for chemical enhanced processing; alumina silicate glass with high mechanical strength; through after chemical enhanced; can prevent to show the shock resistance of product protection screen surface effectively and scratch infringement; prolong electronics and show the work-ing life of product and strengthen result of use, strengthened the safety control of building and POS.
Summary of the invention
The object of the invention is, a kind of alumina silicate glass is provided, and has excellent in chemical tempering ability, can realize high mechanical strength, comprises ultimate compression strength height, bending strength height, impact strength is good, microhardness is high, wearability is good, the scratch resistance performance is good.Simultaneously, have the sheet glass of high visible light transmissivity, satisfy the safe handling that electronics shows product screen protection and building and POS.
The present invention has carried out a large amount of research work, found that: utilize the aluminosilicate glass of high basic metal content to be the basis, by known formed from plate glass technology, it is manufactured sheet glass, handle through chemical tempering then, can realize above-mentioned purpose.
Alumina silicate glass of the present invention can be handled by chemical tempering, obtains the further enhancing of physical strength, improves folding strength, shock resistance and scuffing performance, satisfies the safe handling that electronics shows product screen saver function and building and POS.
The reinforcement medium of chemical tempering of the present invention is a potassium nitrate solution, and the chemical tempering temperature is 430 ℃～490 ℃, and the chemical enhanced time is 3～8 hours, and the ion-exchange degree of depth 〉=30 μ m reaches as high as 75 μ m.Behind chemical tempering, its glass Vickers' hardness can reach 640MPa, and ultimate compression strength can reach 830MPa, and folding strength can reach 92MPa.The damaged energy of glass shock resistance can reach 4.3J (thickness 1.2mm), 6.0J (thickness 2.0mm), 7.8J (thickness 3.0mm).Failing the alumina silicate glass physical strength of intensive treatment increases by 20～50%, and soda-lime glass, neutral glass, the E glass machinery intensity through same chemical enhanced processing increases by 30～60%.
Glass material of the present invention is characterized in that: be made of following composition, each composition is by the quality percentage composition,
SiO
2 55～65
B
2O
3 0.1～3
Al
2O
3 6～24
Li
2O 0～3
Na
2O 5～15
K
2O 0～6
MgO 1～5
CaO 0～3
BaO 0～2
SrO 0～2
And wherein MgO+CaO+BaO+SrO 3～9
ZrO
2 0～1
ZnO 0～2
Cl
2 0.1～0.5
Sb
2O
3 0.1～1.0
SO
3 0.1～0.5
F
2 0.1～0.5
Glass material of the present invention, its serial intrinsic viscosity point temperature is 10
3The temperature of dPas viscosity is below 1490 ℃; 10
4The temperature of dPas viscosity is below 1270 ℃; 10
7.6The temperature of dPas viscosity is below 870 ℃; 10
14.5The temperature of dPas viscosity is below 650 ℃.
Glass material of the present invention is the aluminosilicate glass system, adopts multiple finings to realize clarifying effect, such as oxymuriate, fluorochemical, vitriol, weisspiessglanz.Finings can one or more common uses, add an amount of nitrate simultaneously.
Glass material of the present invention, by the coloring ion content and the O/R value of feed glass raw material, the visible light average transmittances that makes glass is greater than 91%.And according to the difference that glass is formed, its average coefficient of linear expansion is (60～103) * 10
-7/ ℃ scope, its specific refractory power 1.500～1.530.
Embodiment
Glass material is protected in electronics demonstration product protection of the present invention screen protection, can use the alumina silicate glass of following composition, by the quality percentage composition,
SiO
2 55～65
B
2O
3 0.1～5
Al
2O
3 6～24
MgO+CaO+BaO+SrO 3～9
Particularly, in the quality percentage composition, contain the alumina silicate glass of following composition:
SiO
2 55～65
B
2O
3 0.1～3
Al
2O
3 6～24
Li
2O 0～3
Na
2O 5～15
K
2O 0～6
MgO 1～5
CaO 0～3
BaO 0～2
SrO 0～2
And wherein MgO+CaO+BaO+SrO 3～9
ZrO
2 0～1
ZnO 0～2
Cl
2 0.1～0.5
Sb
2O
3 0.1～1.0
SO
3 0.1～0.5
F
2 0.1～0.5
In above-mentioned glass was formed, the scope reason of each composition of qualification was as described below.
SiO
2Be the composition that is used to constitute necessity of glass skeleton, its content is high more, can improve chemical durability more, can improve physical strength more.On the other hand, owing to have the tendency that improves viscosity, so, if too much just be difficult to obtain the long glass of expecting property.Its content is more than 55%, preferably more than 58%, in addition, below 65%, preferably below 63%, is more preferably below 62%, further preferably below 61%.If SiO
2Be more than 58%, but just can guarantee the chemical durability and the physical strength of usage level.In addition, if SiO
2Be below 65%, the fusion of then selected quartz raw material does not just need the longer time, so, can not produce difficulty to producing, if below 63%, then glass adhesion reduces.If below 61%, then the viscosity of glass further reduces, and can easily obtain the high sheet glass of dimensional precision.
B
2O
3Be the neccessary composition that is used to improve meltbility, reduces glass viscosity, its content is many more, and glass just shows low viscosity characteristics.On the other hand, have the tendency that reduces chemical durability, its content is more than 0.1%, is preferably more than 0.25%, more preferably more than 0.3%, further preferably more than 0.4%.In addition, B
2O
3Be below 3%, be preferably below 0.6%, be more preferably below 0.55%.
Al
2O
3Being the necessary composition that greatly improves glass chemistry stability, reducing the devitrification of glass tendency, also is simultaneously the necessary composition that improves glass hard (HRC65 and physical strength, and it is the composition that improves modulus in tension, but it has the tendency that improves glass viscosity, if Al
2O
3Content is too much, just is difficult to obtain the long glass of expecting property.Its content is more than 6%, preferably more than 10%, is more preferably more than 15%, further preferably more than 16%.In addition, Al
2O
3Below 24%, preferably below 22%, be more preferably below 20%.If more than 6%, then glass crystalline possibility is very little, if greater than more than 10%, crystallization does not take place substantially, is suitable for the high sheet glass of production dimensional precision.If more than 6%, then the physical strength of glass significantly improves.Obtain the glass viewpoint of high modulus in tension from expectation, preferably contain more than 10%.In addition, if Al
2O
3Be below 20%, then the viscosity of glass melting liquid can be not too high, melting temperature (Tm) is less than 1680 ℃, if below 18%, and then easier melting temperature (Tm), glass fusion quality, glass ware forming temperature, devitrification of glass problem, glass machinery intensity and the chemical stability taken into account.
Alkalimetal oxide makes the glass melting temperature descend as the flux composition.If the content of these compositions is more than 5%, just can expect to have the effect of the fusion that improves glass.In addition, can make the glass low viscosity, viscosity characteristics is elongated, can improve the stability of glass again.Preferably 10～20%, be more preferably 14～18%.When the content of alkali metal component is more than 5%, has the possibility of using all-electric melting furnace fusion technology.Simultaneously,, have the possibility of chemical tempering ion-exchange when the content of alkali metal component is more than 5%, preferred more than 10%, more preferably more than 15%, and in alkalimetal oxide, contain the Li more than 60% of mass content
2O, Na
2O can cause chemical tempering intensity higher, is fit to lithium and sodium ion in the potassium ion displacement glass, makes glass surface produce huge stress.
Li
2O, Na
2O and K
2The content separately of O preferably is respectively Li
2O 0～3 (particularly 0.5～2%), Na
2O 5～15% (particularly 8～14%, further be 11～13%), K
2O 0～6% (particularly 1～5%, further be 2～4%, the best is 2～4%).And, recommend Li
2O, Na
2O and K
2O is shared, perhaps uses two kinds at least, for using Na simultaneously
2O and K
2Content ratio during O, preferred Na
2O and K
2The mass ratio of O is 3～4, if in this scope, and by the mixed base effect, the viscosity that can easily realize improving meltbility and reduce glass.
The a large amount of intermediate oxide Al of existence in glass
2O
3Basic metal exists under the more situation simultaneously, aluminium exists with tetrahedron in the glass, its volume is bigger than silicon-oxy tetrahedron, can produce bigger space, ion-exchange is more prone to, and the exchange degree of depth is bigger, the ion-exchange degree of depth of high basic metal alumina silicate glass is very easy to be reached more than 30 microns, even reach 75 microns, and soda-lime glass, neutral glass, the ion-exchange degree of depth of E glass is generally at 10～20 microns, and is so very easy in the very big example exchange degree of depth of aluminosilicate glass surface generation thickness, play restraining effect for scuffing and impact fracture, obviously improve physical strength.
MgO, CaO, SrO, BaO as the alkali earths glass ingredient can make stabilizationization, prevent to produce in glass crystallization.In addition, have moving of the alkali that suppresses in the glass.The total amount of its content is 3～9%, preferably 4～6%, further preferably 4.5～5.5%.If more than 3%, the effect that prevents that alkali from moving just appears, if contain more than 4%, has and suppresses the crystalline effect significantly.
MgO also has the effect of the modulus in tension that improves glass except above-mentioned feature, it is the alkaline-earth metal main source.Its containing ratio is 1～5%, preferably 2～4.5%, be more preferably 2.5～4.0%.If below 5%, just can suppress Mg is that crystalline is separated out, if below 4%, just is difficult to separate out Mg and binds crystalline substance when forming of glass.Below 3.5%, just extremely difficulty is separated out Mg and is bound crystalline substance, so, can increase the combination free degree with other composition, this is preferred.
CaO is the composition same with MgO, but compares with MgO, reactive low with refractory body etc.Its content is 0～3%, preferably 0.1～2%, be more preferably 0.1～1%, further preferably 0.3～0.8%.Contain the CaO more than 0.1%, the effect of stabilizationization just can occur making, if contain more than 0.3%, just further stabilized glass.If contain the SrO more than 0.1%, the effect of stabilizationization has just appearred making.More effective is more than 0.1%, if more than 0.3%, just can relatively reduce SiO
2Amount, the result is to make glass hang down viscosityization.BaO is identical with the SrO effect, and content is 0～2%, and preferably 0.1～1.0%, be more preferably 0.2～0.5%.The effect that stabilizationization, inhibition crystallization are separated out is also big.
ZrO
2Having the glass chemistry of improvement stability, prevent that the alkalies and alkaline earth ion from exposing effect, also is the composition that improves modulus in tension in addition.Its content is 0～1.0%, preferably 0.01～0.8%, be more preferably 0.1～0.6%, further preferably 0.2～0.5%.
ZnO has the viscosity that reduces glass, the outstanding effect composition that the inhibition crystallization is separated out.Its content is 0～3%, preferably 0.1～1%.If below 0.5%, just be difficult to generate the crystallization that contains Zn system.
Muriate is effectively as finings, uses Cl
2Represent the remaining quantity in the glass, its amount is 0.1～0.5%, preferably 0.2-0.4%.If Cl
2Be more than 0.1%, have effect of sufficient,, just satisfy clarifying effect fully if below 0.5% as finings.
Sb
2O
3As finings also is effectively, and its content is 0.1～1.0%, is more preferably 0.2～0.8%, further preferably 0.25～0.6%.If more than 0.2%, clarifying effect just appears, if more than 0.25%, just can access sufficient clarifying effect.
Sulfate radical also has clarifying effect in the high temperature melting condition, with SO residual in the glass
3For estimating foundation, its amount 0.1～0.5% is advisable, and is more preferably 0.2～0.3%.
Fluorochemical has clarifying effect in hot conditions equally, with F remaining in the glass
2For estimating foundation, its amount 0.1～0.5% is advisable, and is more preferably 0.25～0.35%.
To Fe in the glass composition
2O
3Control very importantly, can avoid glass coloring, the Fe in the raw material
2O
3Seem very important, Fe in the glass with the control and management to iron in the production
2O
3Content be controlled at 10～150PPm and be advisable, be preferably 30～100PPm, more preferably 40～80PPm.
The process of glass process is as follows:
At first, select frit, make it become above-mentioned feature glass and form, prepare, uniform mixing fuses at glass-melting furnace, and the fusion mode can adopt pure oxygen stove, all-electric melting furnace, flame+electricity fusing-aid stove.Adopt known formed from plate glass method, comprise vertical drawing process, rolling process, float glass process, narrow slit glass tube down-drawing, press over system, horizontal sheet process, form 1.0～5mm sheet glass, carrying out glass surface grinding and polishing and edging handles, adopt molten nitrate to carry out chemical tempering then, 430 ℃～490 ℃ of tempering chemical tempering temperature, the chemical tempering treatment time is 3～8 hours, finally carries out performance evaluation.
At first, press table 1 embodiment 1 glass composition and select raw material, the glass that makes its batching satisfy embodiment 1 is formed, and uses platinum crucible fusion 24 hours under 1500 ℃ of temperature then.After fusion, with the plate glass goods of fused solution press forming, anneal then for regulation, grind again and polish, make glass specimen, be divided into two groups, one group is not carried out chemical enhanced processing, one group is carried out chemical tempering and handles 490 ℃ of chemical enhanced temperature, 3 hours chemical enhanced time.The fundamental property that has shown sample at table 1.From performance, before and after chemical enhanced processing, apparent density, the coefficient of expansion, specific refractory power, transmitance, glass intrinsic viscosity point almost do not have difference.Yet aspect physical strength, bigger difference takes place, the Vickers' hardness of for example not carrying out chemical enhanced processing only has 586MPa, and is 638MPa after the intensive treatment, gain in strength 8.8%; Ultimate compression strength only has 637MPa before chemical enhanced, and is 826MPa after the intensive treatment, gain in strength 29.6%; Folding strength only has 56.2MPa before chemical enhanced, and is 91.3MPa after the intensive treatment, gain in strength 62.5%; With the 2mm heavy sheet glass is example, and the damaged energy of chemical enhanced preceding shock resistance only has 3.86J, and is 5.96J after the intensive treatment, gain in strength 54.4%; The glass of other thickness is before and after chemical enhanced processing, and damaged energy average increment is 46.6%.Simultaneously, the chemical enhanced result of not carrying out chemical enhanced processing machine intensity and comparative example 1 (E glass), comparative example 2 (soda-lime glass), comparative example 3 (neutral glass) of embodiment 1 near or exceed their performance.And surpass the chemical enhanced processing of comparative example 1 (E glass), comparative example 2 (soda-lime glass), comparative example 3 (neutral glass) all sidedly through the mechanical property of chemical enhanced processing.And every index exceeds 30～120%.And, the main raw material requirement that admixtion uses, (150 μ m screen overflows are below 1% to use quartz sand, 45 μ m screen underflows are below 30%), aluminium hydroxide or aluminum oxide (median size 50 μ m), (400 μ m screen overflows are below 10% for boric acid or borax, 63 μ m screen underflows are below 10%), purity calcium carbonate (median size 250 μ m), Strontium carbonate powder (median size 20 μ m), nitrate of baryta (median size 500 μ m) screen overflow is below 1%, 50 μ m) screen underflow is below 5%), barium carbonate (median size 50 μ m), zinc oxide (median size 10 μ m screen overflows are below 1%), as other glass ingredient, use the magnesiumcarbonate of SILVER REAGENT, magnesium oxide, strontium nitrate, bariumchloride, Quilonum Retard, lithium hydroxide, soda ash, salt of wormwood, zirconium white, zirconium silicate, antimony peroxide, ANTIMONY TRIOXIDE SB 203 99.8 PCT, Calcium Fluoride (Fluorspan), Sodium Silicofluoride, sodium sulfate, barium sulfate, sodium-chlor.And, Fe in the frit
2O
3Carry out strictness control, require content less than 100PPm, finished glass Fe
2O
3Content is less than 150PPm, F
2And Cl
2Be the value of utilizing x-ray fluorescence analysis to obtain, SO
3Be the value of obtaining by chemical analysis in the glass dissolving, the glass properties evaluation is carried out with reference to following method.
The evaluation of glass apparent density is to carry out like this.Specifically, use sink and float method, this method is to select Beta-bromo naphthalene and tetrabromoethane to mix the liquid that forms different specific weight by a certain percentage, glass sample is suspended in mixing test solution top, and along with variation of temperature, the density of test solution is done corresponding the variation, when the density of test solution is consistent with glass specimen, glass begins to sink, and according to the temperature factor of sinking temperature and test solution, just can measure the density of glass.
The expansion coefficient of glass thread evaluation is to carry out like this.Specifically, use the dilatometer method, this method is that sample is placed on the silica glass support, utilizes thermal expansivity different of glass specimen and silica glass, measures both relative elongations in heat-processed.And the coefficient of expansion of quartz glass tube is known, so the total elongation of glass specimen should be the elongation sum of the isometric silica glass frame of digital sensor reading and sample.With it divided by institute's intensification degree and sample length.Final expression glass is in the unit length of room temperature to 300 ℃ and the increment of unit length.
The glass refraction evaluation is to carry out like this.Specifically, use Abbe refractometer.
The visible light transmissivity evaluation is to carry out like this.Specifically, adopt GB5433-85, use spectrophotometer.
The glass viscosity evaluation is to carry out like this.Specifically, the measuring method and the instrument of the employing of different viscosity value are also different.10
3DPas and 10
4The dPas viscosity measurement is adopted the rotation high temperature viscosimeter with reference to ASTM C-965 standard; 10
7.6The dPas viscosity measurement is with reference to ASTM C-338, the Littleton softening point apparatus, adopt the glass yarn of Φ 0.65 ± 0.1mm length 230mm to carry out in process furnace, heating by 5 ℃/min speed, temperature when extension speed is 1mm/min is a softening point temperature, and it characterizes the softening unique point of glass at the deadweight state; 10
14.5The dPas viscosity measurement is used coefficient of expansion determinator with reference to ASTM E-228.
The glass hard (HRC65 evaluation is to carry out like this.Specifically, adopt digital display microhardness instrument, adopt the Vickers pressure head, load is 100g, action time 15s.
Glass ultimate compression strength and folding strength evaluation are to carry out like this.Specifically, adopt multi-functional mechanical test machine, measure with reference to ASTM C 109.
The evaluation of glass impact fracture energy is to carry out like this.Specifically, falling ball impact test machine, adopting the impact ball weight is 227g, measures with reference to ASTM D256.
Embodiment 2
The actual composition of glass is with reference to table 1 embodiment 2, uses raw material and the ingredient requirement identical with embodiment 1, prepares burden according to embodiment 2 glass composition, uses platinum crucible fusion 24 hours under 1600 ℃ of temperature then.After fusion, with the plate glass goods of fused solution press forming, anneal then for regulation, grind and polish, make glass specimen, be divided into two groups, one group is not carried out chemical enhanced processing, one group is carried out chemical tempering and handles 460 ℃ of chemical enhanced temperature, 6 hours chemical enhanced time.The fundamental property that has shown sample at table 1.From performance, before and after chemical enhanced processing, apparent density, the coefficient of expansion, specific refractory power, transmitance, glass intrinsic viscosity point almost do not have difference.Yet aspect physical strength, bigger difference takes place, the Vickers' hardness of for example not carrying out chemical enhanced processing only has 573MPa, and is 627MPa after the intensive treatment, gain in strength 9.4%; Ultimate compression strength only has 628MPa before chemical enhanced, and is 813MPa after the intensive treatment, gain in strength 29.5%; Folding strength only has 53.1MPa before chemical enhanced, and is 86.5MPa after the intensive treatment, gain in strength 62.9%; With the 2mm heavy sheet glass is example, and the damaged energy of chemical enhanced preceding shock resistance only has 3.46J, and is 5.78J after the intensive treatment, gain in strength 67.0%; The glass of other thickness is before and after chemical enhanced processing, and damaged energy average increment is 49.3%.Simultaneously, the chemical enhanced result of not carrying out chemical enhanced processing machine intensity and comparative example 1 (E glass), comparative example 2 (soda-lime glass), comparative example 3 (neutral glass) of embodiment 2 near or exceed their performance.And surpass the chemical enhanced processing of comparative example 1 (E glass), comparative example 2 (soda-lime glass), comparative example 3 (neutral glass) all sidedly through the mechanical property of chemical enhanced processing.And every index exceeds 24～114%.Fundamental property and comparative example performance perameter thereof before and after table 1 has shown the chemical treatment of sample, testing method is identical with embodiment 1.
Embodiment 3
The actual composition of glass is with reference to table 1 embodiment 3, uses the raw material identical with embodiment 1, prepares burden according to embodiment 3 glass composition, uses platinum crucible fusion 24 hours under 1670 ℃ of temperature then.After fusion, with the plate glass goods of fused solution press forming for regulation, anneal then, grind and polish, make glass specimen, sample is divided into two groups, one group is not carried out chemical enhanced processing, one group is carried out chemical tempering and handles 430 ℃ of chemical enhanced temperature, 8 hours chemical enhanced time.The fundamental property that has shown sample at table 1.From performance, before and after chemical enhanced processing, apparent density, the coefficient of expansion, specific refractory power, transmitance, glass intrinsic viscosity point almost do not have difference.Yet aspect physical strength, bigger difference takes place, the Vickers' hardness of for example not carrying out chemical enhanced processing only has 556MPa, and is 618MPa after the intensive treatment, gain in strength 11.2%; Ultimate compression strength only has 603MPa before chemical enhanced, and is 787MPa after the intensive treatment, gain in strength 30.5%; Folding strength only has 48.6MPa before chemical enhanced, and is 80.5MPa after the intensive treatment, gain in strength 65.6%; With the 2mm heavy sheet glass is example, and the damaged energy of chemical enhanced preceding shock resistance only has 2.98J, and is 5.36J after the intensive treatment, gain in strength 79.9%; The glass of other thickness is before and after chemical enhanced processing, and damaged energy average increment is 56.5%.Simultaneously, the chemical enhanced result of not carrying out chemical enhanced processing machine intensity and comparative example 1 (E glass), comparative example 2 (soda-lime glass), comparative example 3 (neutral glass) of embodiment 3 near or exceed their performance.And surpass the chemical enhanced processing of comparative example 1 (E glass), comparative example 2 (soda-lime glass), comparative example 3 (neutral glass) all sidedly through the mechanical property of chemical enhanced processing.And every index exceeds 22～84.5%.Fundamental property and comparative example performance perameter thereof before and after table 1 has shown the chemical treatment of sample, testing method is identical with embodiment 1.
Table 1
Claims (3)
1. high strength aluminosilicate glass is characterized in that: be made of following composition, each composition is by the quality percentage composition,
SiO
2 55～65
B
2O
3 0.1～3
A1
2O
3 6～24
Li
2O 0～3
Na
2O 5～15
K
2O 0～6
MgO 1～5
CaO 0～3
BaO 0～2
SrO 0～2
And wherein MgO+CaO+BaO+SrO 3～9
ZrO
2 0～1
ZnO 0～2
Cl
2 0.1～0.5
Sb
2O
3 0.1～1.0
SO
3 0.1～0.5
F
2 0.1～0.5
2. the chemical toughening method of glass according to claim 1 is characterized in that: carry out chemical tempering and handle in the saltpetre fused solution.
3. as the chemical toughening method of glass as described in the claim 2, it is characterized in that: 430 ℃～490 ℃ of chemical tempering temperature, the chemical tempering treatment time is 3～8 hours.
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| WO2011069338A1 (en) | 2009-12-11 | 2011-06-16 | 肖特公开股份有限公司 | Aluminosilicate glass for touch screen |
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