CN105923991B - Optical glass, its preparation method and application - Google Patents

Optical glass, its preparation method and application Download PDF

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Publication number
CN105923991B
CN105923991B CN201610261322.0A CN201610261322A CN105923991B CN 105923991 B CN105923991 B CN 105923991B CN 201610261322 A CN201610261322 A CN 201610261322A CN 105923991 B CN105923991 B CN 105923991B
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content
glass
optical glass
compound
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CN105923991A (en
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胡向平
李建新
沈义梅
霍金龙
徐华峰
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Hubei New Huaguang Information Materials Co Ltd
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Hubei New Huaguang Information Materials Co Ltd
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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
    • G02B3/00—Simple or compound lenses
    • 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
    • C03C2201/00—Glass compositions
    • C03C2201/06—Doped silica-based glasses
    • C03C2201/30—Doped silica-based glasses containing metals
    • C03C2201/34—Doped silica-based glasses containing metals containing rare earth metals
    • C03C2201/3411—Yttrium
    • 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
    • C03C2201/00—Glass compositions
    • C03C2201/06—Doped silica-based glasses
    • C03C2201/30—Doped silica-based glasses containing metals
    • C03C2201/34—Doped silica-based glasses containing metals containing rare earth metals
    • C03C2201/3417—Lanthanum
    • 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
    • C03C2201/00—Glass compositions
    • C03C2201/06—Doped silica-based glasses
    • C03C2201/30—Doped silica-based glasses containing metals
    • C03C2201/34—Doped silica-based glasses containing metals containing rare earth metals
    • C03C2201/3452—Gadolinium
    • 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
    • C03C2201/00—Glass compositions
    • C03C2201/06—Doped silica-based glasses
    • C03C2201/30—Doped silica-based glasses containing metals
    • C03C2201/40—Doped silica-based glasses containing metals containing transition metals other than rare earth metals, e.g. Zr, Nb, Ta or Zn
    • C03C2201/42—Doped silica-based glasses containing metals containing transition metals other than rare earth metals, e.g. Zr, Nb, Ta or Zn containing titanium
    • 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
    • C03C2203/00—Production processes
    • C03C2203/10—Melting processes

Abstract

The present invention provides a kind of optical glass, its preparation method and application, and the optical glass includes the following components in terms of compound: SiO2: 6-10%, preferably 8-10%；B2O3: 8-12%, preferably 9-12%；La2O3: 40-45%, preferably 40-42%；Gd2O3: 8-15%, preferably 8-13%；Y2O3: 8-12%, preferably 8-10%；Ta2O5: 3-8%, preferably 5-7%；Nb2O5: 1-5%, preferably 2-4%；TiO2: 0.1-5%, preferably 1-3%；ZrO2: 3-5%, preferably 3-4%；ZnO:5-10%, preferably 7-9%；Sb2O3: 0-0.1%；Above-mentioned percentage is weight percentage；K is not contained in the optical glass2O、Na2O、Li2O、CaO、BaO、SrO、Th、Pb、As、Cd、Hg、GeO2、TeO2And/or Yb2O3.The transmission performance of prepared optical glass is good, refractive index is high, and the cost of raw material is low, and can satisfy the requirement of high refractive low dispersive.

Description

Optical glass, its preparation method and application
Technical field
The present invention relates to a kind of optical glass, its preparation method and application, belong to optical glass technical field.
Background technique
High-refraction low-dispersion optical glass for mold is widely used in manufacturing camera, look in the distance because transmission performance is good, refractive index is high In the lens of mirror, microscope and other optical instruments.Usual optical glass transmission performance and refractive index are closely related, refractive index More high often through performance is deteriorated, glass coloration tendency aggravation.With the development of science and technology being proposed to optical glass performance higher It is required that.
Patent application CN102424523A discloses a kind of refractive index 1.88 or more, the optics glass that Abbe number is 37 or more Glass, weight percent content are as follows: the B of 10-20%2O3；The La of 25-35%2O3；The Gd of 10-20%2O3；10-20%'s Ta2O5；The ZnO of 8-15%；The Li of 0.1-2%2O；The WO of 5-15%3, excessively high Ta is contained in component2O5And Gd2O3It will increase The cost of the raw material of glass, Li2The addition of O can cause to corrode to melted platinum crucible, cause the cracking of crucible, WO3Excess Introducing can make glass coloration degree and through performance be deteriorated.
Patent application CN102320739A discloses a kind of refractive index 1.75 or more, optics glass of the Abbe number 35 or more Glass contains the Y less than 3.5% in composition by weight percentage2O3, ZnO less than 2%.
Patent application CN101386469A discloses a kind of refractive index in 1.85-1.90, and Abbe number is within the scope of 35-45 Optical glass, wherein Ta2O5Content be 19-27%, Y2O3Content be 0-8%, but the transmittance of this optical glass exists For corresponding wavelength in 440nm or so, transmission is lower when 80%, and the Ta of too high amount2O5It will increase the raw material of glass Cost.
Patent application CN101333071A discloses a kind of refractive index 1.8830, optical glass of the Abbe number 40.80, Wherein Ta2O5Content 10.5-19.5%, Y2O3Content be 0-3%, the content of ZnO is 0-3%, TiO2Content be 0- 1.0%, the Ta of too high amount2O5It will increase the cost of glass raw material.
Patent application CN101337768A discloses a kind of refractive index in 1.86-1.92, and Abbe number is within the scope of 35-40 Optical glass, wherein Y2O3Content be 0-3%, be free of ZnO, the high temperature viscosity of the glass increases, and is unfavorable for gas in glass production The spilling of bubble, and for corresponding wavelength in 440nm or so, transmission is lower at 80% for the transmittance of the glass.
Patent application CN101792257A discloses a kind of refractive index 1.85 or more, the optics glass of 36 or more abbe number Glass, but SiO2Content is 0.1-8%, Li2O is with essential component addition and content is 0.5-3%, and Ta2O5As must be at Divide and content is 10-25%；Li2The presence of O can cause to corrode to melted crucible, excessive Ta2O5Will cause raw material at This increase.
Patent application CN100393652C discloses a kind of refractive index 1.85-1.90, the optical glass of Abbe number 40-42, Wherein Ta2O5Content is 15-25%, ∑ Ta2O5+Nb2O5Content be 18-28%, ZrO2Content is 4.5-7%, Ta2O5Contain Measure the excessively high cost that will increase raw material.
Patent application CN101014546A discloses a kind of refractive index 1.85 or more, optics of the abbe number 36 or more Glass, Li2The content of O is 0.5-3%, and Ta2O5Content be 10-25%, excessive Ta2O5It will cause the cost of raw material Increase.
Patent application CN102320739A discloses a kind of refractive index 1.75 or more, and abbe number is in 35 range above Optical glass, the content of ZnO are 0.1-2%, Y2O3Content be 3.5%, B2O3Content be 15-28%, Gd2O3Content For 25-35%, La2O3Content be 28-35%, ZrO2Content be 5.0-9.0%, and excessive Gd2O3、La2O3It will increase The cost of raw material.
Patent application CN101117268A discloses a kind of 1.83 or more refractive index, the optical glass of 35 or more Abbe number, Wherein Ta2O5Content is 15-25%, ZrO2Content is 4.5-7%, Ta2O5Too high levels will increase the costs of raw material.
Summary of the invention
Problems to be solved by the invention
The purpose of the present invention is to provide a kind of optical glass, its preparation method and application, prepared optics glass The transmission performance of glass is good, refractive index is high, and the cost of raw material is low, and can satisfy the requirement of high refractive low dispersive.
The solution to the problem
The present invention provides a kind of optical glass, and it includes the following components in terms of compound:
SiO2: 6-10%, preferably 8-10%；
B2O3: 8-12%, preferably 9-12%；
La2O3: 40-45%, preferably 40-42%；
Gd2O3: 8-15%, preferably 8-13%；
Y2O3: 8-12%, preferably 8-10%；
Ta2O5: 3-8%, preferably 5-7%；
Nb2O5: 1-5%, preferably 2-4%；
TiO2: 0.1-5%, preferably 1-3%；
ZrO2:3-5%, preferably 3-4%；
ZnO:5-10%, preferably 7-9%；
Sb2O3: 0-0.1%；
Above-mentioned percentage is weight percentage；
K is not contained in the optical glass2O、Na2O、Li2O、CaO、BaO、SrO、Th、Pb、As、Cd、Hg、GeO2、TeO2 And/or Yb2O3。
Optical glass according to the present invention, wherein in terms of the weight percent of compound, ∑ SiO2+B2O3Content be 15-20%, preferably 18-20%.
Optical glass according to the present invention, wherein in terms of the weight percent of compound, ∑ La2O3+Gd2O3+Y2O3Contain Amount is 56-65%, preferably 58-63%.
Optical glass according to the present invention, wherein in terms of the weight percent of compound, ∑ Nb2O5+TiO2Content be 3-7%, preferably 3-5%.
Optical glass according to the present invention, wherein in terms of the weight percent of compound, the B2O3Content with it is described SiO2The ratio between content B2O3/SiO2For 1-1.4, preferably 1-1.2.
Optical glass according to the present invention, wherein in terms of the weight percent of compound, the content of the Nb2O5 and institute Stating the ratio between content of TiO2 is 1.4-2, preferably 1.4-1.7.
Optical glass according to the present invention, wherein in terms of the weight percent of compound, the La2O3Content and ∑ La2O3+Gd2O3+Y2O3The ratio between content be 0.67-0.72, preferably 0.67-0.7.
Optical glass according to the present invention, wherein in terms of the weight percent of compound, the Ta2O5Content and ∑ La2O3+Gd2O3+Y2O3+Nb2O5+ZrO2The ratio between content for 0.11 hereinafter, preferably 0.1 or less.
The present invention also provides a kind of preparation methods of optical glass according to the present invention, comprising: proportionally by each component It weighs, carry out melting after mixing, melting while is passed through oxygen in glass frit, is then poured or leaks note in shaping mould It is formed in tool or direct pressing forms.
The present invention also provides a kind of application of optical glass according to the present invention in optical lens.
The effect of invention
Optical glass of the invention, refractive index ndWithin the scope of 1.87-1.89, Abbe number υdIt is close within the scope of 39-41 Degree is lower than 5.25g/cm3, 2 grades of acid resistance, glass transmittance reaches corresponding wavelength X when 70%70In 390nm hereinafter, not containing K2O、Na2O、Li2O、CaO、BaO、SrO、Th、Pb、As、Cd、Hg、GeO2、TeO2And/or Yb2O3, the cost of the raw material of glass It is low, and through performance is good.
Specific embodiment
The present invention provides a kind of optical glass, and it includes the following components in terms of compound:
SiO2: 6-10%, preferably 8-10%；
B2O3: 8-12%, preferably 9-12%；
La2O3: 40-45%, preferably 40-42%；
Gd2O3: 8-15%, preferably 8-13%；
Y2O3: 8-12%, preferably 8-10%；
Ta2O5: 3-8%, preferably 5-7%；
Nb2O5: 1-5%, preferably 2-4%；
TiO2: 0.1-5%, preferably 1-3%；
ZrO2: 3-5%, preferably 3-4%；
ZnO:5-10%, preferably 7-9%；
Sb2O3: 0-0.1%；
Above-mentioned percentage is weight percentage；
K is not contained in the optical glass2O、Na2O、Li2O、CaO、BaO、SrO、Th、Pb、As、Cd、Hg、GeO2、TeO2 And/or Yb2O3。
Raw material incorporation way use can introduce the diversified forms of the compound of its corresponding content.In as described below, each group The content divided is expressed in weight percent.
SiO2It is that glass network generates body, the stability of glass can be improved, effectively adjust the liquid phase viscosity of glass, improve glass The crystallization property of glass.SiO2Content it is too low, the bridging oxygen content in glass can be reduced；Too high levels, then glass melting is deteriorated, And glass transition temperature increases.Therefore, SiO2Content control between 6-10%, between preferably greater than 8-10%, Between more preferably 8-9%.
B2O3Be the essential component to form glass network structure, can be efficiently modified the meltbility of glass, reduce smelting temperature and Flow temperature.B2O3Too high levels cause refractive index to reduce, and inside glass crystallization is too fast, can not steady production；B2O3Content Too low, then the melting behaviour of glass is poor, cannot promote each constituent component of optical glass under 1350 DEG C and temperature below Fusing, and will cause glass and La2O3Intersolubility reduce, performance is unstable, therefore, B2O3Content control 8-12% it Between, between preferably 9-12%, between more preferably 10-11%.
Optical glass of the invention, ∑ SiO2+B2O3Too high levels, it is more difficult to obtain required optical constant, ∑ SiO2 +B2O3Content it is too low, the meltbility and stability of optical glass are poor.∑ SiO in optical glass of the invention2+B2O3's Content controls between 15-20%, between preferably 18-20%.
B2O3Content and the SiO2The ratio between content within the scope of 1-1.4, preferably 1-1.2 when, the stabilization of formation Property is more preferable, and the temperature of devitrification of glass can be lower.B2O3Content and the SiO2The ratio between content it is excessively high when, the optics glass of formation The chemical stability of glass is deteriorated, and be easy to cause the inside crystallization of glass, and crystallization excessive velocities.
La2O3It is the important component to form glass, has the function of improving glass refraction, reduces dispersion.La2O3Contain Measure too low, refractive index reduction, dispersion raising；La2O3Too high levels, devitrification resistance can decline.Therefore, La2O3Content control Between 40-45%, between preferably 40-42%.
Gd2O3Have the function of improving glass refraction, reduce dispersion, and helps to improve the devitrification resistance property of glass. Gd2O3Content it is too low, refractive index reduce, dispersion increase；Gd2O3Too high levels, devitrification resistance be deteriorated, the cost of raw material It increases.Therefore, Gd2O3Content control between 8-15%, between preferably 8-13%.
Y2O3Have the function of improving glass refraction, reduce dispersion, can obtain required optical constant, and can be with Improve the devitrification resistance of glass.Therefore, Y2O3Content control in 8-12%, preferably between 8-10%, most preferably 8-9% it Between.
Work as La2O3、Gd2O3And Y2O3When three kinds of rare earth oxides introduce glass simultaneously, it can effectively increase each oxide and exist Solubility in glass can be easier to obtain required optical constant, and reduce the liquidus temperature of glass, reduce glass Devitrification.Therefore, ∑ La2O3+Gd2O3+Y2O3Content control between 56-65%, between preferably 58-63%.
In addition, can be realized batch steady production, the La to further make the transmission performance of glass excellent2O3Contain Amount and ∑ La2O3+Gd2O3+Y2O3The ratio between content can control between 0.67-0.72, between preferably 0.67-0.7.
Ta2O5It is the necessary component to form glass, the refractive index and devitrification resistance property of glass can be improved.But too high levels It will lead to Abbe number reduction, while will increase the cost of the raw material of glass, therefore, Ta2O5Content control between 3-8%, Between preferably 5-7%.
Also, it is raw originally in order to further decrease production, it can be by the Ta2O5Content and ∑ La2O3+Gd2O3+Y2O3+ Nb2O5+ZrO2The control of the ratio between content 0.11 hereinafter, preferably 0.1 or less.
Nb2O5It is the essential component to form glass, there is the refractive index for improving glass, improve chemical stability and crystallization The effect of energy.Nb2O5Too high levels or too low, can not obtain required optical property, the dispersion of glass will increase. Therefore, Nb2O5Content control between 1-5%, between preferably 2-4%.
TiO2The refractive index and Abbe number, the density for improving devitrification resistance and reduction glass of glass can be adjusted.But TiO2Too high levels, will lead to devitrification resistance variation, be also deteriorated in the glass transmission of visible short long (500nm or less), And the Abbe number of glass can also reduce.Therefore, TiO2Content control between 0.1-5%, between preferably 1-3%.
Control ∑ Nb2O5+TiO2Content, the refractive index and Abbe number of glass can be further adjusted, so that the folding of glass It penetrates rate and Abbe number is met the requirements, and a small amount of TiO2Addition can improve the crystallization property of glass, therefore, ∑ Nb again2O5+ TiO2Content control within the scope of 3-7%, between preferably 3-5%.
In addition, Nb2O5And TiO2While improving glass refraction, Nb2O5Content will not influence the transmission of glass substantially Performance, with TiO2The through performance of the increase glass of introduction volume can be deteriorated, but TiO2The crystallization of glass can be obviously improved Can, therefore, the Nb2O5Content and the TiO2The control of the ratio between content between 1.4-2, preferably 1.4-1.7.
ZrO2It is the neccessary composition of optical glass of the invention, has and improve devitrification resistance and improvement chemical stability Effect, can also play the role of improving refractive index and dispersion.ZrO2Too high levels when, the meltbility of glass can be reduced Can, and the crystallization property of glass can be deteriorated.Therefore, ZrO2Content control between 3-5%.
ZnO is the neccessary composition of optical glass of the invention, and glass transition temperature can be effectively reduced, and improves glass Transmittance and the high temperature viscosity for reducing glass, and the bubble of glass can be effectively eliminated.Also there is raising glass chemistry to stablize Property with inhibit crystallization effect.The content of ZnO is too low, and the glass melting performance is caused to decline, and chemical stability is deteriorated； Too high levels can make the devitrification resistance of glass be deteriorated, and therefore, the content of ZnO controls the preferred content 7- between 5-10% Between 9%.
The present invention is with SiO2-B2O3-R2O3Based on system, wherein R2O3Select La2O3And Y2O3As primary raw material, thus Obtain the glass that transmission performance is good, refractive index is high.Introducing Gd appropriate2O3Improve devitrification of glass performance, in order to obtain high folding Penetrate rate introducing portion Nb in glass2O5With a small amount of TiO2It realizes, reduces Ta to the greatest extent2O5、WO3Etc. expensive raw material Introduction volume, to reduce the cost of raw material of glass.In addition, glass transition temperature T of the inventiong680-700 DEG C it Between, the number of foreign matter containing Pt is 2/100cm in glass3Below.
For the transmissivity for guaranteeing optical glass of the present invention, optical glass provided by the invention simultaneously, also without containing Th, Cd, Pb, As, Hg etc., can also be without containing Tl, Os, Be, Se etc. to the compound and fluoride of the harmful element of environment and human body Element.In addition, without containing the K for having corrosion function to smelting apparatus in optical glass of the invention2O、Na2O、Li2O、CaO、SrO And BaO, without containing having absorption peak near infrared band and reduce the Yb of glass transmission2O3, without containing expensive GeO2、TeO2.In addition, optical glass of the invention can also be free of when not needing to colour optical glass of the invention There are other elements that can be coloured, such as: V, Mo, Cr, Mn, Fe, Co, Ni, Cu, Ag etc..
The present invention also provides a kind of preparation methods of optical glass according to the present invention, comprising: proportionally by each component It weighs, carry out melting after mixing, melting while is passed through oxygen in glass frit, is then poured or leaks note in shaping mould It is formed in tool or direct pressing forms.
The preparation method of optical glass of the present invention, specifically includes: each component being weighed in proportion, after mixing Be made batch, and manufactured batch put into smelting apparatus, 1280-1380 DEG C at a temperature of, melt within 20-24 hour Melt, stir evenly, melting while is two-tube in two times to be passed through oxygen in glass frit, is then poured or leaks note in molding die Middle molding or direct pressing molding.
Since the ratio of oxide in glass is 92% or more, glass compares in the gas released in melting process It is few, so that the bubble in glass be caused to be not easy to overflow from glass.For the product for obtaining bubble, transmitance is met the requirements, The hot stage of melting can be passed through oxygen into glass frit by two-tube in two times, on the one hand can increase the oxygen of glass metal Change atmosphere, increases in glass that gas content promotees to increase the collision opportunity of Bubbles in Glass in gas solubility and glass So that minute bubbles is gathered into air pocket, accelerate gas bubble light soil, to reach the purpose for eliminating Bubbles in Glass.Another aspect oxygen The erosion to platinum crucible can be reduced by changing atmosphere, reduced the platinum content in glass, improved the through performance of glass.
The present invention also provides a kind of application of optical glass according to the present invention in optical lens.Such as light of the invention Learning glass can apply in optics such as digital product, video camera, crystal projection, telescope, microscope and the lens of optic communication In lens.
Embodiment
More specific description is carried out to the present invention below by embodiment, but the present invention is not limited to these embodiments.
The each component of embodiment 1-10 in table 1 is weighed in proportion, batch is made after mixing, and is matched by made of Close material investment platinum crucible in, 1280 ± 20 DEG C at a temperature of, by 6 hours fusing after, be warming up to 1380 DEG C carry out 10 hours After mixing evenly, two-tube in two times oxygen to be passed through in glass frit 4 hours, it comes out of the stove, leaks after being cooled to 1320 DEG C of heat preservations 2 hours Die for molding is infused, can be prepared by optical glass of the invention after glass annealing is cooling.
Comparative example 1-6 is weighed in defined ratio respectively in the corresponding raw material of each component, using with embodiment 1-10 phase Prepared by same preparation method, obtain the optical glass of comparative example 1-6.
Refractive index n is carried out to gained optical glass according to the test method of GB/T7962.1-2010d, Abbe number υdSurvey It measures, listed n in tabled、υdFor the data after -25 DEG C of annealing.
The survey of glass transition temperature Tg is carried out to gained optical glass according to the test method of GB/T7962.16-2010 Amount.
The density of gained optical glass is measured according to the test method of GB/T7962.20-2010.
Optical glass shortwave transmitted spectrum characteristic degree of staining (λ70/λ5) indicate.λ70Refer to that glass transmittance reaches 70% When corresponding wavelength, λ5Refer to that glass transmittance reaches corresponding wavelength when 5%.According to Japanese glass industry association " optics glass The light of glass degree of staining measuring method " JOGIS02, the glass with a thickness of 10 ± 0.1mm that measurement is ground through parallel opposite are saturating Cross rate.According to the test method of GB/T10576-2006 to the acid resistance D of the chemical stability of gained optical glassAIt is surveyed Amount.
The Pt foreign matter number of gained optical glass is measured according to the test method of GB/T7962.8-2010.Specifically, Light irradiates tested glass from side, does background with black screen, and the reflection and scattering process by means of Pt in glass to light are seen Examine the case where glass includes Pt foreign matter.Light source used is the cold emission directional lighting halogen tungsten lamp of 50-100W, when detection, is detected glass Illumination on glass is not less than 20000Lx.
By the refractive index n of optical glass made from embodiment 1-10d, Abbe number υd, glass transition temperature Tg, density p, Glass transmittance reaches corresponding wavelength X when 70%70, stabilization performance Tg/LT, acid resistance DA, foreign matter containing Pt in glass The several and cost of raw material, is listed in Table 1 below, and comparative example 1-6 is listed in Table 2 below through measuring obtained data.
Embodiment 1-10
Table 1: the glass ingredient and performance parameter of embodiment 1-10, cost of material
Table 2: the glass ingredient and performance parameter of comparative example 1-6, cost of material
The refractive index n of the optical glass of 1-10 of the embodiment of the present inventiondWithin the scope of 1.87-1.89, Abbe number υdIn 39-41 In range, density is lower than 5.25g/cm3, acid resistance can reach 2 grades, and glass transmittance reaches corresponding wavelength when 70% λ70No more than 390nm, there is low crystallization ceiling temperature and good processing performance, be suitable for mass production, especially glass The platinum foreign matter number of the melting in platinum crucible is no more than 2/100cm3, and its cost is in 200 yuan/kg or less.
The glass and glass phase ratio of the invention that comparative example 1 is prepared, glass transition temperature is higher, chemical stabilization Property is relatively low, and acid resistance is only capable of reaching 4 grades, and acid resistance is weaker.
The glass and glass phase ratio of the invention that comparative example 2 is prepared, refractive index and Abbe number be not in the application In the range of, acid resistance grade is only capable of reaching 3 grades, and acid resistance is weaker, and glass transition temperature is higher, glass transmittance Reach corresponding wavelength X when 70%70For 392nm, in 390nm or more.
The glass and glass phase ratio of the invention that comparative example 3 and comparative example 4 are prepared, density are higher than 5.25g/cm3, It is unfavorable for mitigating the weight of optical element and glass batchization uses；And acid resistance grade is only capable of reaching 3 grades, acid resistance It is weaker.
The glass transition temperature for the glass that comparative example 5 is prepared is higher；The Abbe for the glass that comparative example 6 is prepared Number is not within the scope of this application.
Finally, the cost of raw material of the optical glass of comparative example 1-6, which compares embodiment 1-6, increases by 30% or more, glass The number of foreign matter containing Pt of the melting in platinum crucible is more compared to the present invention, influences the internal soundness of glass.

Claims (17)

1. a kind of optical glass, which is characterized in that it includes the following components in terms of compound:
SiO2: 6-10%；
B2O3: 8-12%；
La2O3: 40.9-45%；
Gd2O3: 8-15%；
Y2O3: 8-12%；
Ta2O5: 3-8%；
Nb2O5: 1-5%；
TiO2: 0.1-5%；
ZrO2: 3-5%；
ZnO:5-10%；
Sb2O3: 0-0.1%；
Above-mentioned percentage is weight percentage；
K is not contained in the optical glass2O、Na2O、Li2O、CaO、BaO、SrO、Th、Pb、As、Cd、Hg、GeO2、TeO2And/or Yb2O3；
The refractive index n of the optical glassdWithin the scope of 1.87-1.89, Abbe number υdWithin the scope of 39-41；
The Nb2O5Content and the TiO2The ratio between content be 1.4-2；
When the transmittance of the optical glass reaches 70%, corresponding wavelength X70In 390nm or less；
The glass transition temperature T of the optical glassgBetween 680-700 DEG C.
2. optical glass according to claim 1, which is characterized in that in terms of compound, the SiO2Additional amount be 8- 10%, the B2O3Additional amount be 9-12%, the La2O3Additional amount be 40.9-42%, the Gd2O3Additional amount be 8-13%, the Y2O3Additional amount be 8-10%, the Ta2O5Additional amount be 5-7%, the Nb2O5Additional amount be 2- 4%, the TiO2Additional amount be 1-3%, the ZrO2Additional amount be 3-4%, the additional amount of the ZnO is 7-9%；On Percentage is stated to be weight percentage.
3. optical glass according to claim 1, which is characterized in that in terms of the weight percent of compound, ∑ SiO2+ B2O3Content be 15-20%.
4. optical glass according to claim 3, which is characterized in that in terms of the weight percent of compound, ∑ SiO2+ B2O3Content be 18-20%.
5. optical glass according to claim 1 or 2, which is characterized in that in terms of the weight percent of compound, ∑ La2O3 +Gd2O3+Y2O3Content be 58-65%.
6. optical glass according to claim 5, which is characterized in that in terms of the weight percent of compound, ∑ La2O3+ Gd2O3+Y2O3Content be 58-63%.
7. optical glass according to claim 1 or 2, which is characterized in that in terms of the weight percent of compound, ∑ Nb2O5 +TiO2Content be 3-7%.
8. optical glass according to claim 7, which is characterized in that in terms of the weight percent of compound, ∑ Nb2O5+ TiO2Content be 3-5%.
9. optical glass according to claim 1 or 2, which is characterized in that described in terms of the weight percent of compound B2O3Content and the SiO2The ratio between content B2O3/SiO2For 1-1.4.
10. optical glass according to claim 9, which is characterized in that in terms of the weight percent of compound, the B2O3 Content and the SiO2The ratio between content B2O3/SiO2For 1-1.2.
11. optical glass according to claim 1 or 2, which is characterized in that described in terms of the weight percent of compound Nb2O5Content and the TiO2The ratio between content be 1.4-1.7.
12. optical glass according to claim 1 or 2, which is characterized in that described in terms of the weight percent of compound La2O3Content and ∑ La2O3+Gd2O3+Y2O3The ratio between content be 0.67-0.72.
13. optical glass according to claim 12, which is characterized in that described in terms of the weight percent of compound La2O3Content and ∑ La2O3+Gd2O3+Y2O3The ratio between content be 0.67-0.7.
14. optical glass according to claim 1 or 2, which is characterized in that described in terms of the weight percent of compound Ta2O5Content and ∑ La2O3+Gd2O3+Y2O3+Nb2O5+ZrO2The ratio between content be 0.11 or less.
15. optical glass according to claim 14, which is characterized in that described in terms of the weight percent of compound Ta2O5Content and ∑ La2O3+Gd2O3+Y2O3+Nb2O5+ZrO2The ratio between content be 0.1 or less.
16. a kind of preparation method of optical glass described in any one of -15 according to claim 1 characterized by comprising Each component is proportionally weighed, carries out melting after mixing, melting while is passed through oxygen in glass frit, then pours Note or leakage note form in molding die or direct pressing molding.
17. a kind of application of the optical glass described in any one of -15 in optical lens according to claim 1.
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Citations (3)

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CN101497495A (en) * 2008-01-31 2009-08-05 株式会社小原 Optical glass
CN102241479A (en) * 2010-04-30 2011-11-16 株式会社小原 Manufacture method of optical glass, optical element and glass shaped body
CN105198206A (en) * 2015-08-14 2015-12-30 成都光明光电股份有限公司 Optical glass

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101497495A (en) * 2008-01-31 2009-08-05 株式会社小原 Optical glass
CN102241479A (en) * 2010-04-30 2011-11-16 株式会社小原 Manufacture method of optical glass, optical element and glass shaped body
CN105198206A (en) * 2015-08-14 2015-12-30 成都光明光电股份有限公司 Optical glass

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