CN102153279A - Optical glass for precision molding - Google Patents

Optical glass for precision molding Download PDF

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Publication number
CN102153279A
CN102153279A CN2010101192566A CN201010119256A CN102153279A CN 102153279 A CN102153279 A CN 102153279A CN 2010101192566 A CN2010101192566 A CN 2010101192566A CN 201010119256 A CN201010119256 A CN 201010119256A CN 102153279 A CN102153279 A CN 102153279A
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China
Prior art keywords
glass
opticglass
described glass
ratio
accurate
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CN2010101192566A
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CN102153279B (en
Inventor
张广军
乔斯·西默
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Schott Glass Technologies Suzhou Co Ltd
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Schott Glass Technologies Suzhou Co Ltd
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Priority to CN2010101192566A priority Critical patent/CN102153279B/en
Priority to KR1020127023493A priority patent/KR20130001237A/en
Priority to JP2012552250A priority patent/JP2013519610A/en
Priority to CN2011800091683A priority patent/CN103097314A/en
Priority to PCT/CN2011/070936 priority patent/WO2011098043A1/en
Publication of CN102153279A publication Critical patent/CN102153279A/en
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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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses

Abstract

The invention relates to an optical glass for precision molding, of which the refractive index eta[d] is greater than 1.67 and smaller than 1.70, the Abbe number vd is greater than 52.0 and smaller than 55.0, and the glass transition temperature T[g] is lower than 550 DEG C. The optical glass for precision molding comprises the following components in percentage by weight: 5.5-15% of SiO2, 2.6-8% of LiO2, 20-40% of B2O3, 21.5-35% of La2O3, 0.5-10% of Y2O3, 0.1-8% of Ta2O5, 0.1-5% of ZrO2, 1-35% of ZnO, 0-15% of SrO, 0-22% of BaO, 0-10% of Al2O3, 0-2% of Na2O, 0-1% of Sb2O3, 0-1% of SnO2 and 0-1% of CeO2.

Description

The opticglass that is used for accurate die pressing
Technical field
Relate generally to opticglass of the present invention especially, the present invention relates to be suitable for the opticglass of accurate die pressing, more particularly, the present invention relates to have high refractive index, hangs down the accurate die pressing opticglass of degree of dispersion and lower glass transition temperatures.Simultaneously, the element volatilization in mold process of this glass low and not with the moulding stock adhesion.
Background technology
In recent years, the product on optics and the field of photoelectric technology market is tending towards more and more microminiaturized.For the demand of more and more littler end product, and the continuous growth of the stand-alone assembly of this end product and miniaturization of components demand, verified this point.For the manufacturer of opticglass, this development means, except the quality raising of finished product, requires reducing of raw material glass volume undoubtedly.Simultaneously, increase, can produce obviously more waste material because produce this less element of making by glass block and/or ingot from the cost pressure of aftertreatment technology for glass manufacturers.
The at present common processing method of removing the glass part that is used for optical element that replaces from glass block or glass ingot, recently glass melting after, can obtain immediately as far as possible near final profile or finally the production technique of the preformed member of geometrical shape become very important.For example, improved of the requirement of reprocessing factory for preformed member, the approaching final geometrical shape that is used for suppressing again of described preformed member, that is, and so-called " accurate piece ".Usually, term " accurate piece " is meant preferred flame polish fully, the glass part of free or semi-free shaping, and it has been divided into glass part and has had the geometrical shape that approaches the optical element net shape.
This " accurate piece " also preferably can change optical element into by so-called " accurate compacting " or by " accurate die pressing " or " pressure-sizing system ".Described optical element is meant lens, non-spherical element etc., and these speech are synonyms.Therefore, no longer need for example the geometrical shape on described surface further to be processed by surface finish.Because utilize this technology, the volume of melten glass is littler, and mode is more flexible, so set time is shorter.Usually, because the product geometrical shape is little, and the usage quantity of this series products is less relatively and the replacing amount is also less, therefore, to further improve value-added content of product can not be only based on the value of starting material itself, and the product that is based on after the compacting should be in the state that can install, promptly, the aftertreatment of no longer essential effort, cooling and/or deepfreeze again.Because the high precision of desired geometrical shape, this pressing step must use high-grade precision equipment, thereby must use expensive moulding stock.But the life-span of this mould has influenced the profitability of product and/or prepared material greatly.For the long lifetime of mould, a very important factor is to use alap working temperature, but this temperature only can be reduced to certain point, and under this point, the viscosity of material to be pressed still is enough to be used for described pressing step.This means in treatment temp, also, at the transition temperature T of pending glass g, and having direct cause-effect relationship between the profit of this pressing treatment: the transition temperature of glass is low more, and the life-span of mould is long more, thereby profit is big more.Therefore, need so-called " low T gGlass ", that is, have the glass of low melting point and transition temperature, also, have the glass that is enough to the viscosity under alap temperature, handled.
In accurate die pressing is handled, glass is the key request that is used for accurate die pressing to the non-blocking of die surface, because the surface of glass molding die and shaping dies often be bordering on the fused glass contact, any interaction between them all can produce adhesion, perhaps even produce adhesion between glass and the moulding stock.This adhesion or adhesion may cause glasswork or die surface or adhesion wear of the two and destruction.In modern process of glass, the requirement that improves glass quality constantly increases, and wishes the tolerance of controlling dimension more strictly, requires the life-span of mould longer simultaneously, and productivity is higher, and this is requirement economically.Thereby new improved glass composition with non-blocking energy is very important.
Another important factor is that glass should have smaller elements volatilization, and reactive less with the mould of accurate die pressing.B 2O 3And Li 2O is volatilization easily in accurate die pressing is handled.The problem of a key is to suppress B 2O 3And Li 2The volatilization of O in accurate pressing process is with the accuracy that keeps accurate compacting back glass to form.
P2000-119036A has described the opticglass that is used for accurate compacting, and wherein the concentration of CaO is 5-20wt.%, La 2O 3Be lower than 21wt.%, this can not increase specific refractory power effectively and suppress B 2O 3And Li 2The volatilization of O.JP 2001-130924 discloses a kind of opticglass with high refractive index that is used for accurate pressing process, and described glass contains the CaO of 2wt% at least.US6,806,217B2 has described the mould lens glass, and described glass contains the CaO of 4wt% at least.In the accurate die pressing process, the glass that contains CaO has higher volatilization and Elements Diffusion, and the glass that contains CaO easily with moulding stock in common platinum and wolfram varbide react.The existence of CaO can increase B in the accurate die pressing technology 2O 3And Li 2The volatilization of O, the quality that this can destroy mould and reduce opticglass.
JP1286934 discloses a kind of low melting glass, and the shortcoming of these glass is: easy and die surface adhesion, volatilization degree height in accurate die pressing is handled.
JP 60-221338 discloses a kind of opticglass that is used for the high refractive index of accurate die pressing technology, but be suitable for temperature under the accurate die pressing viscosity because the devitrification temperature of this glass is higher than glass, described glass is unsuitable for by using accurate die pressing to produce opticglass.In addition, the shortcoming of described glass is: easy and die surface adhesion, glass ingredient has higher volatilization in accurate die pressing is handled.
In the practice, have the angle of the optical articles of difference or complicated shape, improved requirement moldable glass from formation.Moldable glass is meant and can forms the different or complicated shape of glass by precision modulding, should have the characteristic that viscosity with temperature slowly changes.Glass with the slow variation characteristic of viscosity can have bigger working range, so the range of choice of mold pressing parameter is bigger.
Another noticeable phenomenon is, along with further raising to environmental requirement, the further enhancing of people's environmental consciousness, and to improving the requirement of processing environment, realize that the environmental friendliness in the glass processing manufacturing more and more causes people's extensive concern, therefore, not using or as far as possible still less use poisonous, objectionable constituent is developing direction of following " green " glass.
In sum, be used for the glass of accurate die pressing at present, following several aspects are demanded urgently improving:
1) changes or optimize glass ingredient, thereby reduce the adhesion between glass and the mould;
2) further reduce in the glass element processing or the volatilization in the accurate die pressing process so that last glass is formed more accurate;
3) further improve glass specific refractory power, reduce degree of dispersion, improve glass properties,
4) T of reduction glass g, increase the accurate die pressing mould work-ing life and
5) do not use or use less poisonous and harmful element to realize environmental friendliness.
Summary of the invention
For this purpose, the present inventor has found a kind of novel accurate die pressing optical glass composition through long term studies and practice, can realize further reducing the T of glass gThereby, reduce the adhesion between glass and the mould; Further improve the specific refractory power of glass simultaneously and reduce the chromatic dispersion degree, realize improving the purpose of glass properties.In addition, use glass of the present invention can realize the environmental friendliness processing and manufacturing.
Specifically, the object of the present invention is to provide a kind of required favourable optical property (η that has d/ ν d) opticglass, simultaneously can realize lower T g, particularly, do not use PbO and As 2O 3This glass is suitable for being further processed by the precision compacting, is applicable to Application Areass such as drawing, projection, telecommunications, fiber-optic communication project, portable hard drive and laser technology.
The specific refractory power η of glass of the present invention dBe 1.67＜η d＜1.70, be preferably 1.68＜η d＜1.70,1.690＜η more preferably d＜1.695, Abbe number ν dBe 52.0＜ν d＜55.0, be preferably 52.0＜ν d＜54.0,52.0-53.6 more preferably, transition temperature T g＜550 ℃.
Glass of the present invention based on glass composition gross weight (as follows), comprising:
Form wt.%
SiO 2 5.5-15％
Li 2O 2.6-8％
B 2O 3 20-40％
La 2O 3 21.5-35％
Y 2O 3 0.5-10％
Ta 2O 5 0.1-8％
ZrO 2 0.1-5％
ZnO 1-35％
SrO 0-15％
BaO 0-22％
Al 2O 3 0-10％
Na 2O 0-2％
Sb 2O 3 0-1％
SnO 2 0-1％
CeO 2 0-1％
。
Further preferred, glass of the present invention comprises:
Form wt.%
SiO 2 6-14％
Li 2O 2.6-6％
B 2O 3 20-35％
La 2O 3 21.5-30％
Y 2O 3 3-10％
Ta 2O 5 0.1-6％
ZrO 2 0.5-4％
ZnO 2-20％
SrO 5-15％
BaO 5-22％
Al 2O 3 0.01-5％
Na 2O 0-1％
Sb 2O 3 0.01-0.5％
SnO 2 0-0.5％
CeO 2 0-0.5％
。
Further preferred glass of the present invention comprises:
Form wt.%
SiO 2 7-10％
Li 2O 2.8-4.5％
B 2O 3 22.5-27.5％
La 2O 3 21.5-24％
Y 2O 3 3-6.5％
Ta 2O 5 0.8-2.3％
ZrO 2 1.8-2.4％
ZnO 3.8-6.8％
SrO 7.8-13％
BaO 15-20％
Al 2O 3 0.03-0.2％
Na 2O 0-0.5％
Sb 2O 3 0.01-0.3％
SnO 2 0-0.05％
CeO 2 0-0.05％
。
Glass of the present invention with above-mentioned composition, owing to have high surface energy, thereby less with the die surface adhesion in accurate pressing treatment.
Have the glass of the present invention of above-mentioned composition, it can reduce B 2O 3And Li 2The volatilization degree of O can keep forming the accuracy of content behind accurate die pressing.
Glass of the present invention does not contain CaO.The glass that does not contain CaO has lower element volatilization and diffusion in accurate die pressing technology, in itself and the moulding stock reaction of common SiC, vitreous carbon and wolfram varbide less, prolonged die life.
Glass composition of the present invention with above-mentioned composition is suitable for accurate die pressing, in the accurate die pressing treating processes, have smaller elements volatilization and with moulding stock in the reaction of Coating Materials platinum of common SiC, vitreous carbon and wolfram varbide and mould less.Glass of the present invention has good manufacturing property and processing characteristics, can be used for technical fields such as lens, telecommunications, optical communication technique and/or laser.
The present invention has the accurate die pressing opticglass of high refractive index and low degree of dispersion, for more favourable application, can need not refining and the manufacturing optical module, for example is used for the lens of digital camera.Optical module by the accurate die pressing manufacturing can be applicable to fields such as imaging, projection, telecommunications, fiber-optic communication project and laser technology.
The detailed description of invention
In accurate die pressing was handled, the transition temperature of glass was low more, and the work-ing life of mould is long more, thereby profit is high more.Therefore, exist so-called " low T gGlass " demand, that is, have the glass of low melting point and transition temperature, that is, under alap temperature, have the glass that is enough to the viscosity that can handle.In the present invention, the T of glass gBe lower than 550 ℃.Except low transition temperature, glass should have smaller elements volatilization and with moulding stock in the common less reaction of platinum, wolfram varbide.
Glass of the present invention does not contain CaO.The glass that does not contain CaO has lower volatilization and Elements Diffusion in accurate die pressing technology, in itself and the moulding stock reaction of common SiC, vitreous carbon and wolfram varbide less, prolonged die life.The catastrophe characteristics that CaO makes glass have viscosity with temperature, this be unsuitable for forming have high quality, complex-shaped optical articles.The moldability of glass that does not contain CaO is bigger.Mouldable glass is meant and can forms different or complex-shaped glass by precision modulding.Have slowly that the glass of viscosity variation characteristic can have bigger operating temperature range, make die parameters have bigger range of choice.
The La of glass of the present invention 2O 3Ratio is at least 21.5wt%, La 2O 3Ratio 35wt% at the most, preferred 21.5-30wt%, more preferably 21.5-24wt%.Minimum ratio should not be lower than 21.5wt%, guaranteeing high specific refractory power, but should not exceed maximum ratio yet, otherwise will be difficult to form described glass.The La that contains above-mentioned compositing range 2O 3Glass can reduce adhesion with moulding stock because La 2O 3Can increase the surface tension of glass.Simultaneously, the La that contains above-mentioned compositing range 2O 3Glass can suppress B 2O 3And Li 2The volatilization of O, this can keep the accuracy of composition after accurate die pressing.
Glass of the present invention contains the CeO of 1wt% at the most 2, preferred 0-0.5wt%, more preferably 0-0.05wt%, this can improve radiation hardness stability and can be used for laser uses, and for example, is used for the aspheric lens of laser diode.
Glass of the present invention contains the BaO of 22wt% at the most, preferred 5-22wt%, and more preferably 15-20wt% can reduce glass viscosity, suppresses B in the accurate die pressing processing 2O 3And Li 2The volatilization of O.Advantage be reduce with moulding stock in common platinum and the adhesion of wolfram varbide, prolong die life.BaO makes the viscosity with temperature of glass slowly change and change, and this is applicable to and forms high quality, complex-shaped optical articles.The glass that contains BaO can have bigger moldability.Mouldable glass is meant and can forms different or complex-shaped glass by precision modulding.Glass with the slow variation characteristic of viscosity can have bigger operating temperature range, makes die parameters have bigger range of choice.BaO with above-mentioned compositing range can reduce the enthalpy of mixing of glass system, and low enthalpy of mixing means that glass has high stability, and this can reduce the reaction with moulding stock, prolongs die life.
The Y of glass of the present invention 2O 3Ratio 10wt% at the most, preferred 3-10wt%, more preferably 3-6.5wt%.Y 2O 3Content be higher than 10wt% and will cause opticglass of the present invention to produce devitrification.
Glass of the present invention comprises Li 2The maximum of O is 8wt%, preferred 2.6-6wt%, more preferably 2.8-4.5wt%.
B 2O 3Maximum ratio be 40wt%, preferred 20-35wt%, more preferably 22.5-27.5wt%.B 2O 3Stronger one-tenth net performance has increased the stability and the chemical resistance of the anti-crystallization of glass.Yet this ratio preferably should not exceed 30wt%, B 2O 3Too high levels will increase the three-dimensional space frame shape structure of glass inside, thereby network is strengthened, and cause the T of glass gIncrease with temperature of fusion, this is undesirable according to the present invention.In addition, the B of too high amount 2O 3To produce more B 2O 3The composition volatilization, this makes and is difficult to accurately adjust form, thereby increases manufacture difficulty.
The SiO that comprises in these glass as glass-former 2Amount be at least 5.5wt%, SiO 2Maximum ratio be 15wt%, preferred 6-14wt%, more preferably 7-10wt%.SiO 2Ratio increase to and will cause transition temperature to increase to greater than 15wt% being higher than 550 ℃, and can reduce specific refractory power.
The Ta that glass of the present invention contains 2O 5Be 0.1wt% at least, be 8wt% to the maximum, preferred 0.1-8wt%, more preferably 0.8-2.3wt%.Ta 2O 5Guarantee high specific refractory power and have high Abbe number simultaneously, but should not exceed maximum ratio, otherwise glass will become too expensive, thus no longer economical.
The ZrO of glass of the present invention 2Ratio be 0.1-5wt%, preferred 0.5-4wt%, more preferably 1.8-2.4wt%, this can improve the water tolerance of glass.
The CeO of glass of the present invention 2Ratio be 0-1wt%, preferred 0-0.5wt%, more preferably 0-0.05wt%, the irradiation stability that this can improve opticglass is used for laser and uses, for example the non-spherical lens of laser diode.
Glass of the present invention can contain a spot of conventional finings.The summation of the finings that adds is 2.0wt% at the most preferably, more preferably 1.0wt% at the most, and the other one-tenth component of adding will make the component of glass composition obtain 100wt%.Glass of the present invention can contain at least a following component as finings, represents with wt%, as the complementary element of glass composition:
Sb 2O 30-1 and/or
SnO 2 0-1。
Glass of the present invention preferably contains at least a component as finings.The glass composition that contains finings has identical optical property with aforementioned optics glass composition, for example Abbe number and specific refractory power.Yet they are characterised in that good meltability and workability, owing to reduce processing cost, thus cause production cost to reduce, and good Environmental compatibility.
Described glass is suitable for being processed into and approaches final profile, for example manufacturing of accurate piece, and be used for accurate compacting has final accurate profile with manufacturing optical element.
In addition, glass of the present invention can be applicable in the Application Areass such as drawing, projection, telecommunications, fiber-optic communication project, portable hard drive and laser technology.
The method for preparing glass of the present invention has no particular limits.The general fusing method of cooling that adopts prepares glass.Usually with various oxide compounds as raw material, as quartz sand, Wingdale, feldspar, soda ash, boric acid, barium thing etc., mixed preparing by a certain percentage then.Admixtion through heat, clarification, homogenizing, is cooled off then, and casting forms.
Explain the present invention in detail below by a series of embodiment.But the invention is not restricted to described embodiment.
Embodiment
Embodiment
Table 1 is the embodiment of the embodiment in preferred compositing range, and the glass of Miao Shuing prepares according to following steps in an embodiment:
The raw material that uses is oxide compound, oxyhydroxide, carbonate and the nitrate etc. of commercially available routine, all available from Chemical Reagent Co., Ltd., Sinopharm Group (Suzhou), and chemical grade.Form by the weight of listing in the table, after weighing and mixing, mixture is put into the 500ml platinum crucible.Lower the temperature after 1100-1400 ℃ of following fusing in electric furnace, clarification, the homogenizing.Melten glass is cast in the metal die of 400 ℃ of preheatings, then glass and metal die being placed on annealing furnace annealing cooling can obtain.
Table 1 has provided composition, specific refractory power, Abbe number and the transition temperature of embodiment 1-6, and wherein content is represented with wt% based on oxide compound.
Glass sample is made 20 * 20 * 5mm square, wherein one jiao be processed as 90 ° ± 1 ', utilize high precision V-Block refractometer (German Schott) test specific refractory power and Abbe number.
Specific refractory power and Abbe number have reflected the optical property of glass.The specific refractory power of glass is that expression glass is to the tortuous degree by light.Abbe number has reflected the dispersion of glass, so-called chromatic dispersion promptly, glass is inconsistent to the specific refractory power of different wave length light.Abbe number ν d=(η d-1)/(nF-nC), η d: the specific refractory power of d light (587.56nm), nF and nC are respectively the specific refractory poweres of F light (486.13nm) and C light (656.27nm).Every kind of opticglass has different specific refractory poweres and Abbe number.The composition of opticglass has determined every kind of opticglass to have specific specific refractory power and Abbe number scope.
The transition temperature T of glass in this experiment g, and thermal expansivity, CTE measures on the thermal dilatometer of anti-relaxation the (DIL402PC of anti-the relaxation).After glass sample made bar-shaped sample about 50mm, be that 5 ℃/min is warming up to test and finishes with speed from room temperature.
Transition temperature and thermal expansivity reflect the thermal characteristics of glass, provide reference temperature point and performance index to glass post-treatment and application.When the swell increment generation cataclysm of glass, pairing temperature is the transition temperature of sample.
Opticglass can be transformed from the solidified state into plastic stage gradually in a certain temperature range.Its transition temperature T gBe meant that glass specimen is warming up to the temperature of hanging down of speeding from room temperature, TS, its low-temperature region and high-temperature area elongated linear partly prolong the pairing temperature of crossing intersection point.The temperature of wherein speeding to hang down, TS is meant the temperature when glass specimen stops to expand in temperature-rise period.Method by GB/T 7962.16 regulations is measured.
The transition temperature T of glass gAnd have direct cause-effect relationship between the accurate die pressing processing: the transition temperature of glass is low more, and the life-span of mould is long more, thereby profit is big more.Therefore, need so-called " low T gGlass ", that is, have the glass of low melting point and transition temperature.
The thermal expansivity of opticglass is meant in the certain temperature range, and temperature raises 1 ℃ the time, the elongation of glass per unit length.The general temperature range that detects is a room temperature to 300 ℃, provides mean thermal expansion coefficients again.Thermal expansivity plays an important role for the stability of opticglass in environment.Usually the system of applied optics glass needs high stability, if the glass material thermal expansivity is too big, when outside temperature changed, glass size changed, thereby causes system stability to reduce.
Comparative Examples
Carry out accurate die pressing by Toshiba GMP type continuous device, moulding material is WC (wolfram varbide) and is coated with the Pt-Ir coating.
At room temperature glass is positioned in the mould, and in heating steps, is heated to 590 ℃ (corresponding to 10 9The glass viscosity of dPa.s).Then glass is suppressed, pressure is 10Mpa, and the press time is 10 seconds.After discharging pressing pressure, carry out cooling step then.In heating, compacting and cooling step process, use N 2Protection.After glass cools, glass lens is taken out.Whether visual observation mould and glass to check adhesion have taken place between glass and mould.
Table 1
Composition/wt% Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Embodiment 6 Comparative Examples 1 Comparative Examples 2
Li 2O 4.34 3 4.14 3.7 4.34 3.5 2.5 4
B 2O 3 24.2 25.8 22.7 25.62 23.2 25.83 29 36
Al 2O 3 0.04 0.1 0.1 0.1 0.04 0.1
SiO 2 7.5 8.5 9.5 8.42 9 9.92 20 13
Na 2O 0.5 2.9
ZnO 6.6 4 4 3.95 5.6 3.95 8
SrO 12.5 8.7 10 8.65 13 8.65 1 11
Y 2O 3 3 6.15 3.5 6.1 3 5.9 5
ZrO 2 2.2 2 2.2 1.95 2.2 1.95
BaO 15.5 19.15 19.24 18.8 16 17.5 23
La 2O 3 21.5 21.5 23.5 21.55 22 21.5 20
Ta 2O 5 2.1 1.01 1.1 1.1 1.6 1.1 1.3
CaO 13 10
Sb 2O 3 0.01 0.05 0.01 0.06 0.1 0.2 0.1
SnO2 0.01 0.04 0.02
CeO2 0.01
Density (g/cm 3) 3.84 3.87 3.81 3.84 3.86
η dSpecific refractory power 1.691 1.698 1.694 1.688 1.692 1.692 1.663 1.6601
ν dAbbe number 52 52.8 52.3 53.5 52.5 53.1 56.9 56.3
T g(℃) transition temperature 483 523 496 530 579 564
CTE (25-300 ℃) coefficient of expansion 9.8 9.16 9.64 9.4
AT (℃) softening temperature 529 561 537 570
Table 2
Composition/wt.% Embodiment 4 Comparative Examples 1 Comparative Examples 2
Li 2O 3.7 2.5 4
B 2O 3 25.62 29 36
Al 2O 3 0.1
SiO 2 8.42 20 13
ZnO 3.95 8 2.9
SrO 8.65 1
Y 2O 3 6.1 5 11
ZrO 2 1.95
BaO 18.8
La 2O 3 21.55 20 23
Ta 2O 5 1.1 1.3
Sb 2O 3 0.06 0.2 0.1
CaO 13 10
η dSpecific refractory power 1.688 1.663 1.6601
ν dAbbe number 53.5 56.9 56.3
T g(℃) transition temperature 523 579 564
After 100 mold pressings test Not with the mould adhesion With the mould adhesion With the mould adhesion

Claims (27)

1. an opticglass does not contain PbO and As 2O 3, it is characterized in that the specific refractory power η of described glass dBe 1.67＜η d＜1.70, Abbe number ν dBe 52.0＜ν d＜55.0, second-order transition temperature T g＜550 ℃.
2. opticglass as claimed in claim 1 is characterized in that the specific refractory power η of described glass dBe 1.68＜η d＜1.70.
3. opticglass as claimed in claim 2 is characterized in that the specific refractory power η of described glass dBe 1.69＜η d＜1.695.
4. opticglass as claimed in claim 1 is characterized in that the Abbe number ν of described glass dBe 52.0＜ν d＜54.0.
5. opticglass as claimed in claim 1 is characterized in that the Abbe number ν of described glass dBe 52.0＜ν d＜53.6.
6. opticglass comprises:
Form wt.%
SiO 2 5.5-15％
Li 2O 2.6-8％
B 2O 3 20-40％
La 2O 3 21.5-35％
Y 2O 3 0.5-10％
Ta 2O 5 0.1-8％
ZrO 2 0.1-5％
ZnO 1-35％
SrO 0-15％
BaO 0-22％
Al 2O 3 0-10％
Na 2O 0-2％
Sb 2O 3 0-1％
SnO 2 0-1％
CeO 2 0-1％
。
7. opticglass as claimed in claim 6 is characterized in that the La of described glass 2O 3Ratio is 21.5-30wt%.
8. opticglass as claimed in claim 7 is characterized in that the La of described glass 2O 3Ratio is 21.5-24wt%.
9. opticglass as claimed in claim 6, the BaO ratio that it is characterized in that described glass is 5-22wt%.
10. opticglass as claimed in claim 9, the BaO ratio that it is characterized in that described glass is 15-20wt%.
11. opticglass as claimed in claim 6 is characterized in that the Y of described glass 2O 3Ratio is 3-10wt%.
12., it is characterized in that the Y of described glass as the opticglass of claim 11 2O 3Ratio is 3-6.5wt%.
13. opticglass as claimed in claim 6 is characterized in that the Li of described glass 2The O ratio is 2.6-6wt%.
14., it is characterized in that the Li of described glass as the opticglass of claim 13 2The O ratio is 2.8-4.5wt%.
15. opticglass as claimed in claim 6 is characterized in that the B of described glass 2O 3Ratio is 20-35wt%.
16., it is characterized in that the B of described glass as the opticglass of claim 15 2O 3Ratio is 22.5-27.5wt%.
17. opticglass as claimed in claim 6 is characterized in that the SiO of described glass 2Ratio is 6-14wt%.
18., it is characterized in that the SiO of described glass as the opticglass of claim 17 2Ratio is 7-10wt%.
19. opticglass as claimed in claim 6 is characterized in that the Ta of described glass 2O 5Ratio be 0.1-6wt%.
20. opticglass as claimed in claim 6 is characterized in that the Ta of described glass 2O 5Ratio be 0.8-2.3wt%.
21. opticglass as claimed in claim 6 is characterized in that the ZrO of described glass 2Ratio is 0.5-4wt%.
22., it is characterized in that the ZrO of described glass as the opticglass of claim 21 2Ratio is 1.8-2.4wt%.
23. opticglass as claimed in claim 6 is characterized in that the CeO of described glass 2Ratio is 0-0.5wt%.
24., it is characterized in that the CeO of described glass as the opticglass of claim 23 2Ratio is 0-0.05wt%.
25. an opticglass comprises:
Form wt.%
SiO 2 6-14％
Li 2O 2.6-6％
B 2O 3 20-35％
La 2O 3 21.5-30％
Y 2O 3 3-10％
Ta 2O 5 0.1-6％
ZrO 2 0.5-4％
ZnO 2-20％
SrO 5-15％
BaO 5-22％
Al 2O 3 0.01-5％
Na 2O 0-1％
Sb 2O 3 0.01-0.5％
SnO 2 0-0.5％
CeO 2 0-0.5％
。
26. an opticglass comprises:
Form wt.%
SiO 2 7-10％
Li 2O 2.8-4.5％
B 2O 3 22.5-27.5％
La 2O 3 21.5-24％
Y 2O 3 3-6.5％
Ta 2O 5 0.8-2.3％
ZrO 2 1.8-2.4％
ZnO 3.8-6.8％
SrO 7.8-13％
BaO 15-20％
Al 2O 3 0.03-0.2％
Na 2O 0-0.5％
Sb 2O 3 0.01-0.3％
SnO 2 0-0.05％
CeO 2 0-0.05％
。
27. as the described glass of above-mentioned each claim, it is characterized by and not contain CaO.
CN2010101192566A 2010-02-12 2010-02-12 Optical glass for precision molding Expired - Fee Related CN102153279B (en)

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JP2012552250A JP2013519610A (en) 2010-02-12 2011-02-11 Optical glass for precision molding
CN2011800091683A CN103097314A (en) 2010-02-12 2011-02-11 Optical glass for precision molding
PCT/CN2011/070936 WO2011098043A1 (en) 2010-02-12 2011-02-11 Optical glass for precision molding

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CN104039725A (en) * 2012-01-12 2014-09-10 肖特公开股份有限公司 Highly transmissive glasses with high solarisation resistance, use thereof and method for production thereof
CN116750966A (en) * 2023-06-20 2023-09-15 成都光明光电有限责任公司 Radiation-resistant glass

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WO2011098043A1 (en) 2011-08-18

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