CN105859131A - Crown optical glass - Google Patents

Crown optical glass Download PDF

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Publication number
CN105859131A
CN105859131A CN201610451296.8A CN201610451296A CN105859131A CN 105859131 A CN105859131 A CN 105859131A CN 201610451296 A CN201610451296 A CN 201610451296A CN 105859131 A CN105859131 A CN 105859131A
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glass
optical glass
crown optical
crown
percent
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CN105859131B (en
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毛露路
孙伟
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CDGM Glass Co Ltd
Chengdu Guangming Optoelectronics Co Ltd
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Chengdu Guangming Optoelectronics 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/097—Glass compositions containing silica with 40% to 90% silica, by weight containing phosphorus, niobium or tantalum
    • 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
    • C03C4/00—Compositions for glass with special properties

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Glass Compositions (AREA)

Abstract

The invention provides crown optical glass having a refractive index of 1.48-1.54 and Abbe number of 55-68. The glass does not contain CeO32. The oxidant of the crown optical glass is prepared from the following components in percentage by weight: 57-75 percent of SiO2, 6-15 percent of B2O3, 7-17 percent of K2O, 6-14 percent of Na2O, 0-3 percent of Li2O, 0-1 percent of TiO2 and 0.1-3 percent of Nb2O5. The crown optical glass has relatively high transmittance, good sunlight resistance, small high-temperature viscosity, clarification convenience and good weather resistance under the condition that required optical performance indexes are ensured by means of a reasonable component proportion design.

Description

Crown optical glass
Technical field
The present invention relates to a kind of crown optical glass, especially relating to a kind of refractive index is 1.48-1.54, Abbe Number is 55-68 and ultraviolet to visible waveband transmitance height the crown optical glass with performance at higher resistance to sunshine.
Background technology
The optical glass that refractive index is 1.48-1.54, Abbe number is 55-68 belongs to crown optical glass, this type of Glass is widely applied in all kinds of optical devices.Generally, photosensitiveness crown board optics glass within the above range Glass is after sunlight and high density light beam thereof irradiate, and transmitance is especially tight from the decay of ultraviolet to 400nm wave band Weight.If the contrast glass 1 in table 1 below is the representative crown glass of a kind of comparison, its refractive index is 1.516, Abbe number is 64, and concrete composition is shown in Table 1.It is at JOGIS04-1994 standard gauge fixed condition Under carry out resistance to experiment at sunshine after, 10mm sample at 320nm transmitance decline about 30%, at 400nm Declining 6%, such fall is for needing to be operated in the optical system of 300nm-400nm wave band Unacceptable.But, due to crown glass properties of materials, at the work of especially ultraviolet at long-term sunshine Can decline by lower transmitance, particularly near 320nm, fall is maximum.
Table 1: contrast glass 1 refractive index Abbe number and component situation
Refractive index Abbe number SiO2 B2O3 Al2O3 Sb2O3 BaO CaO K2O Na2O
1.516 63.8 67.1 7.2 0.3 0.1 7.2 2.0 15.2 1.0
Therefore, how rational proportion glass ingredient is studied so that crown glass material is purple at 300nm-400nm The existing higher transmitance of outer wave band, under the effect of sunshine and ultraviolet, life-time service decay is less the most again, For needing the performance boost being operated in the optical system of 300-400nm wave band to be to have bigger meaning.
In general, this type of crown optical glass is due to visible-range (400nm-700nm wave band) transmitance Relatively other optical glass are high, be commonly used to fabricate and transmitance is required high optical element, as pentaprism, The optical elements such as light combination mirror.
In recent years, along with laser display technology, high-brightness projection technology, the development of ultraviolet imagery technology, light The energy density in source promotes further, the long-term work under high density luminous energy of this type of crown glass, transmitance meeting As described above contrast glass 1, drastically reduces, thus limit this type of glass laser display, High-brightness projection, the application in ultraviolet imagery field.
In prior art, add a small amount of CeO the most in glass2Promote the performance at resistance to sunshine of glass, such as US 95119393.7 with the optical glass disclosed in CN201110377843.CeO2Although the resistance to property at sunshine to glass Can there is a lifting, but minimal amount of CeO2After addition, glass is fast to the transmitance of 450nm wave band from ultraviolet band Speed deteriorates, at 300nm wavelength can not transmitted light, 400nm at, interior transmitance is generally less than 98%, if CeO2When adding too much, glass even becomes yellow, is not suitable for use and is being required for from ultraviolet to visible waveband In the optical system that high permeability requires.
The transmitance of this type of crown optical glass except having with component outside the Pass, also relevant with process conditions.Optics Glass needs the bubble using high temperature clarification process to get rid of in glass, high temperature clarification typically to exist in process of production Platinum dish completes.Clarifying temp is the highest, the strongest to the corrosivity of platinum dish, and platinum element can be more Being dissolved in glass and become platinum ion, platinum ion has strong absorption to 360nm-460nm wave band light, can cause The transmitance of the corresponding wave band of glass declines.Therefore, when studying glass composition, need to consider to reduce glass High temperature viscosity, enables glass to get rid of bubble under relatively low clarifying temp, thus improves the transmitance of glass. From the point of view of long-term production practices, if this type of crown glass viscosity at a temperature of 1400 DEG C is less than 150dPaS, Just can obtain transmitance and all can meet, with bubble degree, the product required.
It addition, this type of crown glass also needs to the weatherability considering in the following process of glass when design of components (CR) index.If the weatherability (C of glassR) grade is relatively low, cleaning, dry, during transport etc., Polished glass workpiece surface is easily scrapped by the vapor corrosion in air.From the point of view of production practices, For this type of glass, meet 2 grades and above weatherability, be difficult to go wrong during following process.
Summary of the invention
The technical problem to be solved be to provide a kind of refractive index be 1.48-1.54, Abbe number be The crown glass of 55-68, does not contains CeO in this glass ingredient2, ultraviolet-visible optical band transmitance is high, with Time possess performance at higher resistance to sunshine.
The present invention solves the technical scheme is that crown optical glass of technical problem, the weight of its oxide Percentage ratio composition includes: SiO257-75%, B2O36-15%, K2O 7-17%, Na2O 6-14%, Li2O 0-3%, TiO20-1%, Nb2O50.1-3%.
Further, also include: Al2O30-5%, ZnO 0-4%, MgO 0-4%, CaO 0-4%, BaO 0-4%, SrO 0-4%, Sb2O30-1%.
Further, wherein: Al2O30-2% and/or ZnO 0.1-3% and/or MgO 0-3% and/or CaO 0-3% And/or BaO 0-3% and/or SrO 0-3% and/or Sb2O30-0.5%.
Further, wherein: Al2O30-1% and/or ZnO 0.1-2% and/or BaO 0-2%.
Further, wherein: SiO260-70% and/or B2O38-12% and/or K2O 8-16% and/or Na2O 7-12% and/or Li2O 0-1.5% and/or TiO20-0.5% and/or Nb2O50.1-2%.
Further, wherein: K2O 8-13% and/or Na2O 7-11% and/or Li2O 0-0.5% and/or Nb2O5 0.4-1.5%.
Further, wherein: (SiO2+B2O3)/(Na2O+K2O+Li2O) it is 3-5, preferably 3.5-4.5, enters one Walk preferred 3.8-4.3.
Further, wherein: SiO2/B2O3For 4-11, preferably 5-8, further preferred 5.5-7.
Further, wherein: Na2O/K2O is 0.5-1.2, preferably 0.7-1.2.
Further, wherein: TiO2/Nb2O5Less than 0.8, preferably smaller than 0.5, it is further preferably no larger than 0.3.
Further, τ 300nm (10mm) is more than or equal to 30%, and τ 400nm (10mm) is more than or equal to 99%.
Further, after carrying out resistance to experiment at sunshine under JOGIS04-1994 standard gauge fixed condition, 10mm sample The outer transmitance of product declines less than 8% at 320nm, declines less than 2% at 400nm.
Further, at a temperature of 1400 DEG C viscosity less than 150dPaS.
Further, against weather be 2 grades and more than.
The invention has the beneficial effects as follows: the present invention is designed by rational component proportion, without CeO2Component, In the case of ensureing the spectrophotometric data needed, optical glass has higher transmitance, anti-Japanese according to property Can be good, high temperature viscosity is little simultaneously, it is easy to clarification, and possesses preferable weatherability.
Detailed description of the invention
Each component of of the present invention glass is described below, and except as otherwise noted, the content of each component is to use Weight % represents.
In the glass system of the present invention, SiO2It is that glass primarily forms body, is the main one-tenth constituting glass skeleton Point.If its content is higher than 75%, the refractive index of glass can be less than expected design, and frit dissolving simultaneously can become Obtain more difficulty；If its content is less than 57%, the transmitance of glass, anti-Japanese photograph performance, weatherability all can decline. Therefore, in the present invention, SiO2Content be 57-75%, preferably 60-70%.
B2O3Also it is one of glass former, this type of glass adds appropriate B2O3Can be by the skeleton of glass Structure becomes finer and close, improves the refractive index of glass, transmitance, anti-Japanese photograph performance and weatherability.Meanwhile, B2O3Also it is a kind of cosolvent, material dissolution can be made to become easier to.In the glass system of the present invention, if B2O3Content is higher than 15%, B2O3Coordination structure in glass can change to open structure, thus reduces glass Anti-Japanese according to performance and weatherability；If its content is less than 6%, solubilization-aid effect is inconspicuous, can reduce glass simultaneously Performance and weatherability at resistance to sunshine.Therefore, B2O3Content be set to 6-15%, preferably 8-12%.
SiO2With B2O3It is the Network former of glass, but its structure formed in glass is inconsistent. The principle of material property, the proportionate relationship of two kinds of Network formers and the inside of glass is determined according to material structure Structure is closely related.It is to say, in glass system of the present invention, SiO2With B2O3Proportionate relationship and glass Solubility property, weatherability, performance at resistance to sunshine have substantial connection.Study discovery through the present inventor, work as SiO2/ B2O3Value when being 4-11, the solubility property of glass, weatherability, performance at resistance to sunshine balance the most, preferably its Ratio is 5-8, more preferably 5.5-7.
Li2O、K2O、Na2O belongs to alkali metal oxide, adds in silicate glass system and can interrupt glass Major network, reduce glass high temperature viscosity, the production making glass is the easiest.At vitreous body of the present invention In system, the interpolation of appropriate alkali metal oxide is necessary, and it can obtain intended high temperature viscosity, with Time, as appropriate alkali metal oxide and B2O3When coexisting, B can be improved2O3The consistency of network, relative to Without B2O3Silicate glass for, it is possible to obtain preferably light transmission rate, resistance to property at sunshine and weatherability.
Very few alkali metal oxide can not adjust the viscosity of glass to suitable scope, and too much alkali metal Oxide can drastically destroy again the devitrification resistance energy of glass, light transmission rate, performance at resistance to sunshine and weatherability.Cause This, in glass system of the present invention, Na2The content of O is 6-14%, preferably 7-12%, more preferably 7-11%.K2The content of O is 7-17%, preferably 8-16%, more preferably 8-13%.
Relative to Na2O and K2O, Li2The concentration effect of O is higher, expensive.Excess interpolation can cause glass The drastically deterioration of devitrification resistance energy and cost rapid increase.Therefore, Li2The content of O is 0-3%, is preferably 0-1.5%, more preferably 0-0.5, further be preferably without.
Further, the effect of alkali metal oxide mainly interrupts SiO2Fine and close network thus obtain suitably High temperature viscosity, can reduce the solution temperature of compound simultaneously.Meanwhile, alkali metal oxide can be given B2O3、TiO2、Al2O3There is provided free oxygen Deng intermediate oxide, make glass network densification, thus improve glass Oxygen bridge number in glass, and then improve the light transmission rate of glass, resistance to property at sunshine and weatherability.Formed as network The SiO of body2、B2O3Component and alkali metal oxide component have close conspiracy relation, as satisfied (SiO2+B2O3) /(Na2O+K2O+Li2O) when value is 3-5, the high temperature viscosity of glass, transmitance, devitrification resistance energy, weather-proof The performances such as property can well obtain balance, thus forms preferably glass, when its ratio is 3.5-4.5, Above performance balances the most, and further preferred ratio is 3.8-4.3.
Further, through the research discovery of the present inventor, the effect ratio of a kind of alkali metal oxide is individually added The effect simultaneously adding two or three alkali metal oxide is poor.It should be noted that and work as Na2O/K2O's When value is for 0.5-1.2, glass properties is optimal, and glass surface bright and clean simultaneously, preferably its ratio are 0.7-1.2.
A small amount of Al2O3Addition can improve the network consistency of glass, weatherability and resistance to property at sunshine, simultaneously can Refractive index and dispersion with regulation glass.But add too much Al2O3, glass biodissolution difficulty, high temperature can be caused Viscosity rises, and the rising of glass abrasion degree causes working (machining) efficiency to decline.It is particularly noteworthy that in glass There is B2O3In the case of, too much Al2O3Component can cause Al2O3Preferentially capture free oxygen, make B2O3Network Develop to open structure, and then make the weatherability of glass and devitrification resistance to decline.It addition, it is former in order to reduce The solution temperature of material, the Al of this type of glass2O3Typically use Al (OH)3Form introduce.Due to current Al (OH)3 The restriction of production technology, Al (OH)3In iron tramp be difficult to remove clean, addition too much can cause transmitance Rapid degradation.Therefore, Al2O3Content be 0-5%, preferably 0-2%, further preferred 0-1%.
A small amount of ZnO can adjust refractive index and the dispersion of glass, can improve any surface finish of glass simultaneously Degree, improves the weatherability of glass, reduces the high temperature viscosity of glass.But the ZnO of excess can cause the folding of glass Penetrating rate and dispersion can not reach expection, glass surface tension when clarification can be caused simultaneously to increase, bubble is not allowed Easily get rid of.Therefore, the content of ZnO is 0-4%, preferably 0.1-3%, further preferred 0.1-2%.
A small amount of Nb2O5Can improve refractive index and the dispersion of glass, promote the resistance to property at sunshine of glass, simultaneously from Ultraviolet band is less to the decay of 480nm transmitance.But add too much Nb2O5Can cause the refractive index of glass with Dispersion does not reaches design requirement, simultaneously glass cost increase.Even more noteworthy, if addition is too much, Glass exponentially declines to 480nm transmitance from ultraviolet band, it is impossible to meet the right of some ultraviolet optics system The transmitance requirement of material.Therefore, Nb2O5Content be 0.1-3%, preferably 0.1-2%, further preferably 0.4-1.5%.
A small amount of TiO2Can improve refractive index and the dispersion of glass, and improve simultaneously glass resistance to property at sunshine and Weatherability.But too much adding membership causes glass to drastically reduce to 480nm transmitance from ultraviolet band, reduce speed Degree compares Nb2O5The reduction speed that component is risen faster, thus is difficult to obtain high permeability product.Especially in reality In the production process of border, if melting outside atmosphere fluctuates, the TiO in component2Easily recurring structure change, The transmitance causing glass is unstable, unstable product quality.Therefore, TiO2Content be 0-1%, preferably For 0-0.5%, more preferably without.
Nb2O5And TiO2All it is remarkably improved the resistance to property at sunshine of glass system of the present invention, if two kinds of components in glass In the presence of Tong Shi, TiO need to be met2/Nb2O5Value less than 0.8, preferably smaller than 0.5, more preferably less than 0.3 Time, the performance at resistance to sunshine of glass balances to 480nm transmitance the most with from ultraviolet band.
BaO, SrO, CaO, MgO belong to alkaline earth oxide, add the folding that can adjust glass in glass Penetrate rate and dispersion, the stability of reinforcing glass.Too much alkaline earth oxide can cause the refractive index of glass Not reaching requirement with dispersion, shortwave transmitance and the weatherability of glass can decline simultaneously.Such as vitreous body of the present invention System needs add a small amount of alkaline earth oxide, based on cost and the consideration of aspect of performance, preferably add A small amount of BaO.BaO content is defined to 0-4%, preferably 0-3%, more preferably 0-2%.SrO content limits Be set to 0-4%, preferably 0-3%, more preferably without.CaO content is defined to 0-4%, is preferably 0-3%, more preferably without.Content of MgO is defined to 0-4%, preferably 0-3%, more preferably Without.
Sb2O3It is a kind of clarifier, adds to and glass makes bubble elimination become to be more prone to.In the present invention, Its content is defined to 0-1%, preferably 0-0.5%, further preferably without.
The performance of the optical glass of the present invention be described below:
Refractive index is tested according to GB/T 7962.1 2010 prescriptive procedure with Abbe number.
In at 300nm, 400nm wavelength of 10mm thickness sample, transmitance is advised according to GB/T 7962.12 2010 Determine method test.
High temperature viscosity uses high-temperature viscosimeter to measure, and numerical value unit is dPaS, and its numerical value the least expression viscosity is more Little.
Weatherability test is by polishing sample test initial haze, places in weatherability case, under 90% humidity, Temperature, under conditions of 40-50 DEG C per hour circulation primary, is tested 30 hours, then is used spherical turbidity to measure Turbidity after test agent test, difference △ H is the biggest for its turbidity, represents that its weatherability is the poorest, and table 2 divides for weatherability Level table.
Table 2: weatherability hierarchical table
The glass stability of resistance to sunshine is pressed under JOGIS04-1994 standard conditions, 10mm thickness sample irradiation 4 hours, By the spectral transmittance curve after comparing pre-irradiation and irradiating, determine the glass attenuation at each wavelength. The spectral transmittance curve of glass uses spectrophotometer measurement.
Through test, the optical glass of the present invention has following performance: refractive index is 1.48-1.54, Abbe number For 55-68；In at 300nm wavelength transmitance be more than or equal to 30%, at 400nm wavelength in transmitance be more than Or equal to 99%；At a temperature of 1400 DEG C, viscosity is less than 150dPaS；Weatherability be 2 grades and more than；Abrasion Degree is between 70-130；Under JOGIS04-1994 standard conditions, 10mm thickness sample irradiation 4 hours, At 320nm, outer transmitance declines less than 8%, and at 400nm, outer transmitance declines less than 2%.
In order to further appreciate that technical scheme, the embodiment of of the present invention optical glass is described below. It will be noted that these embodiments do not limit the scope of the present invention.
In table 3-4, the optical glass (embodiment 1-20) of display is by according to shown in table 3-4, each is implemented The ratio of example is weighed and hybrid optical glass common raw material is (such as oxide, hydroxide, carbonate, nitre Hydrochlorate etc.), mixing raw material is placed in platinum crucible, melts 2.5-4 hour in 1300-1400 DEG C, And after clarified, stirring and homogenizing, obtain there is no bubble and the homogeneous melt glass without undissolved material, This melten glass casting mold annealing in mould are formed.
Table 3-4 represents the composition of embodiment of the present invention 1-20；Refractive index (nd)；Abbe number (vd)；300nm Transmitance (τ 300nm) at wavelength；Transmitance (τ 400nm) at 400nm wavelength；Weatherability (CR)； At a temperature of 1400 DEG C, viscosity F represents；By under JOGIS04-1994 standard conditions, 10mm thickness sample irradiation 4 Hour, at 320nm, outer transmitance decline percentage ratio A represents；At 400nm, outer transmitance declines percentage ratio use B represents；(SiO2+B2O3)/(Na2O+K2O+Li2O) value K1 represents；SiO2/B2O3Value K2 represent； Na2O/K2Value K3 of O represents；TiO2/Nb2O5Value K4 represent.
Table 3
Wt% 1 2 3 4 5 6 7 8 9 10
SiO2 68.00 67.80 67.70 67.60 68.00 68.00 60.00 74.00 68.00 68.00
B2O3 10.30 10.30 10.20 10.20 10.30 10.50 14.00 7.00 10.30 10.30
Nb2O5 0.50 0.80 1.00 1.20 0.30 0.50 0.50 0.50 0.50 0.50
TiO2 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Al2O3 0.20 0.20 0.20 0.10 0.10 0.20 0.50 1.00 0.20 0.20
ZnO 0.20 0.20 0.20 0.10 0.20 0.20 1.90 0.00 0.00 0.00
BaO 1.20 1.00 1.00 1.20 1.20 1.00 3.00 0.00 0.00 0.00
CaO 0.00 0.00 0.00 0.00 0.30 0.00 0.00 0.00 0.00 0.70
SrO 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.40 0.00
MgO 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.70
Li2O 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.40 0.00 0.00
Na2O 8.90 8.90 8.00 8.90 8.80 9.20 10.00 7.00 8.90 8.90
K2O 10.60 10.60 11.60 10.60 10.70 10.30 10.00 10.00 10.60 10.60
Sb2O3 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10
Add up to 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00
K1 4.02 4.01 3.97 3.99 4.02 4.03 3.70 4.66 4.02 4.02
K2 6.60 6.58 6.64 6.63 6.60 6.48 4.29 10.57 6.60 6.60
K3 0.84 0.84 0.69 0.84 0.82 0.89 1.00 0.70 0.84 0.84
K4 0.00 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Nd 1.51578 1.51827 1.51819 1.51877 1.51531 1.51632 1.53218 1.50012 1.51423 1.51310
Vd 63.63 63.28 63.55 62.88 63.99 64.25 63.00 65.25 63.20 63.80
CR 1 1 1 1 1 1 1 1 1 1
F(dPaS) 65 60 70 61 63 55 40 110 70 58
τ 300nm (%) 62.5 36.0 39.2 40.0 68.1 61.1 39.4 71.0 61.0 61.3
τ 400nm (%) 99.5 99.5 99.5 99.5 99.6 99.6 99.5 99.7 99.6 99.6
A (%) 7.2 5.9 7.3 5.8 7.0 7.0 7.1 6.8 7.0 6.8
B (%) 1.4 0.7 0.5 0.5 1.8 1.1 1.4 1.1 1.2 1.4
Table 4
Wt% 11 12 13 14 15 16 17 18 19 20
SiO2 67.80 72.00 70.00 61.20 65.00 67.00 68.00 66.00 66.00 66.60
B2O3 10.30 9.00 11.00 7.30 13.70 11.30 10.30 12.30 12.30 10.30
Nb2O5 1.00 0.50 0.80 1.00 0.80 0.50 0.60 0.50 0.50 0.70
TiO2 0.05 0.10 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.05
Al2O3 0.20 1.00 0.00 0.50 0.30 0.20 0.20 0.20 0.00 0.15
ZnO 0.00 0.00 0.00 3.10 0.00 0.20 0.20 0.20 0.40 0.40
BaO 1.00 0.00 0.00 3.00 1.00 1.20 1.00 0.30 1.00 2.20
CaO 0.00 0.00 0.00 3.00 0.00 0.00 0.00 0.00 0.00 0.00
SrO 0.00 0.00 1.00 2.00 0.00 0.00 0.00 0.00 0.00 0.00
MgO 0.00 0.00 0.00 1.00 0.00 0.00 0.00 0.00 0.00 0.00
Li2O 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Na2O 8.95 7.30 7.30 7.30 9.10 8.90 9.00 9.60 9.10 8.90
K2O 10.60 10.00 9.70 10.50 10.00 10.60 10.60 10.80 10.60 10.60
Sb2O3 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10
Add up to 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00
K1 3.99 4.68 4.76 3.85 4.12 4.02 3.99 3.84 3.97 3.94
K2 6.58 8.00 6.36 8.38 4.74 5.93 6.60 5.37 5.37 6.47
K3 0.84 0.73 0.75 0.70 0.91 0.84 0.85 0.89 0.86 0.84
K4 0.05 0.20 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.07
Nd 1.51812 1.50623 1.51538 1.53500 1.52260 1.51712 1.51524 1.51823 1.51912 1.52102
Vd 63.01 65.00 64.90 59.87 64.30 63.42 63.70 63.88 63.31 62.10
CR 1 1 1 1 1 1 1 1 1 1
F((dPaS)) 68 100 120 45 50 63 65 53 52 55
τ 300nm (%) 45.0 48.0 45.0 42.0 59.0 61.5 63.5 62.5 61.6 58.0
τ 400nm (%) 99.5 99.7 99.5 99.4 99.6 99.5 99.5 99.5 99.6 99.5
A (%) 6.0 5.5 5.6 5.8 6.2 7.0 6.9 7.0 6.9 5.8
B (%) 0.6 0.4 0.5 0.9 1.0 1.3 1.2 1.3 1.0 0.6

Claims (14)

1. crown optical glass, it is characterised in that the percentage by weight composition of its oxide includes: SiO2 57-75%, B2O36-15%, K2O 7-17%, Na2O 6-14%, Li2O 0-3%, TiO20-1%, Nb2O50.1-3%.
2. crown optical glass as claimed in claim 1, it is characterised in that also include: Al2O30-5%, ZnO 0-4%, MgO 0-4%, CaO 0-4%, BaO 0-4%, SrO 0-4%, Sb2O30-1%.
3. crown optical glass as claimed in claim 2, it is characterised in that wherein: Al2O30-2% and/ Or ZnO 0.1-3% and/or MgO 0-3% and/or CaO 0-3% and/or BaO 0-3% and/or SrO 0-3% and/ Or Sb2O30-0.5%.
4. crown optical glass as claimed in claim 2, it is characterised in that wherein: Al2O30-1% and/ Or ZnO 0.1-2% and/or BaO 0-2%.
5. crown optical glass as claimed in claim 1, it is characterised in that wherein: SiO260-70% and / or B2O38-12% and/or K2O 8-16% and/or Na2O 7-12% and/or Li2O 0-1.5% and/or TiO2 0-0.5% and/or Nb2O50.1-2%.
6. crown optical glass as claimed in claim 1, it is characterised in that wherein: K2O 8-13% and/ Or Na2O 7-11% and/or Li2O 0-0.5% and/or Nb2O50.4-1.5%.
7. crown optical glass as claimed in claim 1, it is characterised in that wherein: (SiO2+B2O3) /(Na2O+K2O+Li2O) it is 3-5, preferably 3.5-4.5, further preferred 3.8-4.3.
8. crown optical glass as claimed in claim 1, it is characterised in that wherein: SiO2/B2O3For 4-11, preferably 5-8, further preferred 5.5-7.
9. crown optical glass as claimed in claim 1, it is characterised in that wherein: Na2O/K2O is 0.5-1.2, preferably 0.7-1.2.
10. crown optical glass as claimed in claim 1, it is characterised in that wherein: TiO2/Nb2O5 Less than 0.8, preferably smaller than 0.5, it is further preferably no larger than 0.3.
11. crown optical glasses as described in claim 1-10 any claim, it is characterised in that τ 300nm (10mm) is more than or equal to 30%, and τ 400nm (10mm) is more than or equal to 99%.
12. crown optical glasses as described in claim 1-10 any claim, it is characterised in that press After carrying out resistance to experiment at sunshine under JOGIS04-1994 standard gauge fixed condition, the outer transmitance of 10mm sample exists Decline at 320nm less than 8%, decline less than 2% at 400nm.
13. crown optical glasses as described in claim 1-10 any claim, it is characterised in that At a temperature of 1400 DEG C, viscosity is less than 150dPaS.
14. crown optical glasses as described in claim 1-10 any claim, it is characterised in that resistance to Climacteric be 2 grades and more than.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106396373A (en) * 2016-08-26 2017-02-15 湖北戈碧迦光电科技股份有限公司 Functional optical glass, and preparation method and applications thereof
CN111116039A (en) * 2016-11-07 2020-05-08 成都光明光电股份有限公司 Dense crown optical glass
CN111877940A (en) * 2020-08-05 2020-11-03 重庆大学 Novel separation infrared ray heat preservation glass of making an uproar that falls
CN112939455A (en) * 2021-03-23 2021-06-11 成都光明光电股份有限公司 Optical glass, optical element and optical instrument
CN113307490A (en) * 2021-06-01 2021-08-27 中国建筑材料科学研究总院有限公司 Optical glass with high photoinduced refractive index change, optical fiber prepared from optical glass, and preparation method and application of optical fiber
CN113336437A (en) * 2021-06-01 2021-09-03 中国建筑材料科学研究总院有限公司 Optical glass with high photoinduced refractive index change, optical fiber prepared from optical glass, and preparation method and application of optical fiber

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CN1241543A (en) * 1998-06-29 2000-01-19 肖特玻璃制造厂 Lead-free optical glasses

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DE2626541A1 (en) * 1976-06-14 1977-12-15 Leitz Ernst Gmbh LOW DENSITY OPTICAL FLINT GLASS
CN1241543A (en) * 1998-06-29 2000-01-19 肖特玻璃制造厂 Lead-free optical glasses

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106396373A (en) * 2016-08-26 2017-02-15 湖北戈碧迦光电科技股份有限公司 Functional optical glass, and preparation method and applications thereof
CN111116039A (en) * 2016-11-07 2020-05-08 成都光明光电股份有限公司 Dense crown optical glass
CN111116039B (en) * 2016-11-07 2022-02-11 成都光明光电股份有限公司 Dense crown optical glass
CN111877940A (en) * 2020-08-05 2020-11-03 重庆大学 Novel separation infrared ray heat preservation glass of making an uproar that falls
CN112939455A (en) * 2021-03-23 2021-06-11 成都光明光电股份有限公司 Optical glass, optical element and optical instrument
CN112939455B (en) * 2021-03-23 2022-04-15 成都光明光电股份有限公司 Optical glass, optical element and optical instrument
CN113307490A (en) * 2021-06-01 2021-08-27 中国建筑材料科学研究总院有限公司 Optical glass with high photoinduced refractive index change, optical fiber prepared from optical glass, and preparation method and application of optical fiber
CN113336437A (en) * 2021-06-01 2021-09-03 中国建筑材料科学研究总院有限公司 Optical glass with high photoinduced refractive index change, optical fiber prepared from optical glass, and preparation method and application of optical fiber
CN113307490B (en) * 2021-06-01 2022-07-05 中国建筑材料科学研究总院有限公司 Optical glass with high photoinduced refractive index change, optical fiber prepared from optical glass, and preparation method and application of optical fiber

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