CN109320066A - Lanthanum crown optical glass and preparation method thereof and optical element - Google Patents
Lanthanum crown optical glass and preparation method thereof and optical element Download PDFInfo
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- CN109320066A CN109320066A CN201811269787.6A CN201811269787A CN109320066A CN 109320066 A CN109320066 A CN 109320066A CN 201811269787 A CN201811269787 A CN 201811269787A CN 109320066 A CN109320066 A CN 109320066A
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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
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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
- C03C4/00—Compositions for glass with special properties
- C03C4/20—Compositions for glass with special properties for chemical resistant glass
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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Abstract
The present invention provides a kind of lanthanum crown optical glass and preparation method thereof and optical element, and with the total weight of compound, the lanthanum crown optical glass includes following components: SiO2: 18~22%；B2O3: 30.1~34%；La2O3: 18.5~23%；BaO:5~11.9%；SrO:10.1~15%；CaO:4~8%；ZrO2: 1~4%；ZnO:1~5%；Li2O:0.5~3%；Sb2O3: 0.01~0.3%；Above-mentioned percentage is weight percentage.Lanthanum crown optical glass of the invention, have it is at low cost, easily soften, density is low, and washing fastness, alkali resistance are good, the good advantage of transmitance.Further, the present invention also provides a kind of preparation method of lanthanum crown optical glass, the preparation method raw material is easily obtained, and preparation method is simple, and is suitable for batch production.
Description
Technical field
The present invention relates to a kind of lanthanum crown optical glass and preparation method thereof and optical elements, belong to optical glass technology neck
Domain.
Background technique
In recent years, in order to meet the requirement of high-grade digital product high pixel, small portable, have in penetrate rate, low dispersion, close
The demand for spending the lanthanum crown optical glass of the advantages that small is increasing, the reason is that such product is in optical system and high dispersion class glass
Glass matching improves the resolution ratio of optical system, improves into image quality in use, be conducive to offset the especial dispersion of part second order spectrum
Amount.But the La in recent years in order to make glass that there is the above performance, in glass2O3、Y2O3、Nb2O5, ZnO component content is also gradually
Increase, these ingredients excessively will lead to that glass viscosity is small, molding difficulty is big, be not easy to obtain better quality striped and crystallization is serious
The defects of.In addition, the accurate die pressing technology for being different from tradition cold working just gradually obtains promotion and application in order to reduce cost,
But higher die mould temperature can be such that mold is oxidized easily and damage the surface of casted die mould, reduce the service life of mold, from
And die mould production cost is increased indirectly.
Optical glass disclosed in patent document CN100431992C contains 5mol% La below2O3.In order to realize
Scheduled refractive index nd, less La2O3Content can lead to Gd indirectly2O3、Y2O3、Nb2O5The increase of content, but Gd2O3Content liter
Height can undoubtedly make glass increased costs, weaken product competitiveness in the market, Y2O3Addition can make glass increased costs, and make to make
The crystallization trend of glass becomes larger, and Nb2O5Content increases, then glass dispersion can be made substantially to increase, in refractive index ndDetermining premise
Under be difficult to realize scheduled Abbe number υd。
Optical glass disclosed in patent document CN1313405C, but it contains 4mol% ∑ below (SrO+CaO).It crosses
Low ∑ (SrO+CaO) content is unfavorable for improving degree of staining, transmitance, the washing fastness R of glassP(S), alkali resistance ROH (S).
Optical glass disclosed in patent document CN103771705A, but it contains 15% SiO below2, it is 30% below
B2O3And 25% or more BaO.Very few B2O3It can make the meltdown property and washing fastness R of glassP(S), alkali resistance ROH (S)
It is deteriorated, and works as SiO2And B2O3When all tailing off, then it can lead to devitrification of glass performance because the network in glass generates due to body total amount tails off
Sharply it is deteriorated.Excessively high BaO then will increase density, and can make the crystallization property and washing fastness R of glassP(S), alkali resistance
ROH (S) is gradually deteriorated.
Optical glass disclosed in patent document CN1155528C contains 35% or more B2O3, 10% or more CaO,
0.5% Li below2O.Higher B2O3Content can make the viscosity of glass become smaller, form difficulty increase, devitrification resistance gradually becomes
Difference, higher CaO content can make washing fastness RP(S), alkali resistance ROH (S) is deteriorated, less Li2O content makes glass transition
Temperature is excessively high.
Optical glass disclosed in patent document CN102311228A contains 30% B below2O3, 15% is below
La2O3With 20% or more BaO.Less B2O3It can make the meltdown property and washing fastness R of glassP(S), alkali resistance ROH(S) become
Difference, less La2O3It is not easy to realize required nd、υdIt is required that and more BaO can then make the crystallization property of glass and washable
Washing property RP(S), alkali resistance ROH(S) it is gradually deteriorated, and density can be made to increase.
In addition to this, patent CN1903760A, CN1666967A, CN1903762A, CN101445322A,
Optical glass disclosed in CN101215083A, CN1303024C, CN101362629A etc. then composition, application field and purposes,
Concern and desired optical property etc. and obvious differences of the present invention.
Summary of the invention
Problems to be solved by the invention
In view of the technical problems existing in the prior art, present invention firstly provides a kind of refractive index nd1.62~1.68
Between, Abbe number υdLanthanum crown optical glass between 56~60.Lanthanum crown optical glass of the invention have it is at low cost, easily it is soft
The characteristics of change, density is low, and washing fastness, alkali resistance are good, and transmitance is good, suitable for producing.
Further, the present invention also provides a kind of raw materials to be easily obtained, and is suitable for the preparation method of batch production.
Further, the present invention also provides a kind of optical elements comprising lanthanum crown optical glass of the invention.
The solution to the problem
The present invention provides a kind of lanthanum crown optical glass, with the total weight of compound, including following components:
SiO2: 18~22%；
B2O3: 30.1~34%；
La2O3: 18.5~23%；
BaO:5~11.9%；
SrO:10.1~15%；
CaO:4~8%；
ZrO2: 1~4%；
ZnO:1~5%；
Li2O:0.5~3%；
Sb2O3: 0.01~0.3%；
Above-mentioned percentage is weight percentage.
Lanthanum crown optical glass according to the present invention, wherein with the total weight of compound, the SiO2Additional amount be 19
~21.5%；And/or the B2O3Additional amount be 30.5~33%；And/or the La2O3Additional amount be 19~
21.5%；And/or the additional amount of the BaO is 7~11%；And/or the additional amount of the SrO is 10.1~13%；With/
Or, the additional amount of the CaO is 4~7%；And/or the ZrO2Additional amount be 1~3.5%；And/or the ZnO plus
Entering amount is 1~4%；The Li2The additional amount of O is 0.5~2.5%；The Sb2O3Additional amount be 0.01~0.1%.
Lanthanum crown optical glass according to the present invention, wherein with the total weight of compound, the SiO2Content with it is described
B2O3The ratio between content SiO2/B2O3It is 0.55~0.75.
Lanthanum crown optical glass according to the present invention, wherein with the total weight of compound, ∑ (BaO+SrO+CaO) is 20
~29%.
Lanthanum crown optical glass according to the present invention, wherein with the total weight of compound, the content of the BaO with it is described
The ratio between content of SrO BaO/SrO is less than or equal to 1.
Lanthanum crown optical glass according to the present invention, wherein the refractive index n of the lanthanum crown optical glassd1.62~1.68
Between, Abbe number υdBetween 56~60.
Lanthanum crown optical glass according to the present invention, wherein the transition temperature Tg of the lanthanum crown optical glass 610 DEG C with
Under, slackened temperature Ts is at 660 DEG C or less；And/or the density of the lanthanum crown optical glass is in 3.60g/cm3Below；And/or institute
State the washing fastness R of lanthanum crown optical glassPIt (S) is 1~3 grade, the alkali resistance R of the lanthanum crown optical glassOHIt (S) is 1 grade.
Lanthanum crown optical glass according to the present invention, wherein the degree of staining λ of the lanthanum crown optical glass80/λ5In λ80?
355nm is hereinafter, λ5In 275nm or less；And/or inside transmitance of the lanthanum crown optical glass at 450nm 99.5% with
On, the inside transmitance at 360nm is 93% or more.
The present invention also provides a kind of preparation methods of lanthanum crown optical glass according to the present invention, wherein including by institute
The step of stating each component mixing of lanthanum crown optical glass.
The present invention also provides a kind of optical elements, including lanthanum crown optical glass according to the present invention.
The effect of invention
Lanthanum crown optical glass of the invention, have it is at low cost, easily soften, density is low, and washing fastness, alkali resistance are good, penetrate
The good advantage of rate.
Further, the present invention also provides a kind of preparation method of lanthanum crown optical glass, the preparation method raw material is easy to
It obtains, preparation method is simple, and is suitable for batch production.
Specific embodiment
It will be detailed below various exemplary embodiments, feature and aspect of the invention.Dedicated word " example herein
Property " mean " being used as example, embodiment or illustrative ".Here as any embodiment illustrated by " exemplary " should not necessarily be construed as
Preferred or advantageous over other embodiments.
In addition, in order to better illustrate the present invention, numerous details is given in specific embodiment below.
It will be appreciated by those skilled in the art that without certain details, the present invention equally be can be implemented.In other example,
Method well known to those skilled in the art, means, equipment and step are not described in detail, in order to highlight master of the invention
Purport.
In lanthanum crown optical glass produced by the present invention, every kind of component of above-mentioned content is selected by reason described below.
In as described below, the content of each component is with weight percent (wt%) come what is indicated.
In the present invention, SiO2The high temperature viscosity of glass can be improved, be that glass network generates body in glass, add in right amount
Add the mechanical performance that glass devitrification resistance and chemical stability and glass can be improved.In the present invention, with the gross weight of compound
Meter works as SiO2Content less than 18% when, this effect is not obvious enough；Work as SiO2Content be greater than 22% when, then can make glass
Glass is not easy melting, increases the risk for occurring not melting foreign matter, and transition temperature Tg can be made to increase and be unfavorable for glass molds and be pressed into
Type, in addition, SiO2Too high levels are to washing fastness RP(S), alkali resistance ROH(S) also there is certain degradating trend.So SiO2Contain
Amount should control between 18%~22%, be preferably controlled between 19%~21.5%, such as: SiO2Content can be
18.5%, 19.5%, 20%, 20.5%, 21% etc..
In the present invention, B2O3In glass and the network of glass generates body, meanwhile, B2O3Glass can also be improved
Meltdown property, the washing fastness R for improving glassP(S).With the total weight of compound, work as B2O3When content is less than 30.1%, glass
The meltdown property of glass can be deteriorated, and improve RP(S) effect is not obvious enough；And work as B2O3When content is greater than 34%, the refraction of glass
Rate is then not easy to reach the purpose of the present invention, it is difficult to obtain expected optical property, and glass viscosity can be made to become smaller, increase molding
Difficulty.So in the present invention, B2O3Content should control between 30.1%~34%, be preferably controlled in 30.5%~33%
Between；Such as: B2O3Content can be 31%, 31.5%, 32%, 32.5%, 33.5% etc..
In the present invention, work as SiO2Content and B2O3The ratio between content SiO2/B2O3When larger, SiO can be made2Defect it is convex
It is aobvious, increase the risk for occurring not melting foreign matter, and dispersion can be made to increase and make refractive index ndWith Abbe number υdMatching become
Difference works as SiO2Content and B2O3The ratio between content SiO2/B2O3When smaller, then it can make B2O3Volatilization number of dropouts become larger, no
Conducive to the stabilization of product optical property.So in the present invention, with the total weight of compound, the SiO2Content with it is described
B2O3The ratio between content SiO2/B2O3It is 0.55~0.75, preferably between 0.6~0.7, for example, the SiO2Content and institute
State B2O3The ratio between content SiO2/B2O3It can be 0.58,0.62,0.65,0.68,0.72 etc..
La2O3It is one of main component of lanthanide glass with relatively high refractive index and lower dispersion, this light
Feature allow to for greater flexibility with ZnO, ZrO2、RO、R2O adjusts the optical constant of glass, such combination adjustment side together
Formula is more advantageous to the matching of optical glass refractive index and dispersion.In the present invention, La2O3It can be with ZnO, ZrO2、BaO、SrO、
Li2O matching uses the Y of all or part of fictitious hosts valuableness2O3、Gd2O3、Ta2O5Ingredient is realizing the reduction of product cost
It is also beneficial to the reduction of glass density simultaneously.
With the total weight of compound, work as La2O3When content is less than 18.5%, it is difficult to preferably realize the above advantage；And
La2O3When content is greater than 23%, then the crystallization property of glass can be made gradually to be deteriorated.So La2O3Content should control
Between 18.5%~23%, it is preferably controlled between 19%~21.5%；Such as: La2O3Content can be 19%, 19.5%,
20%, 20.5%, 21%, 22%, 22.5% etc..
The effect of BaO in glass is similar with SrO, CaO, and only the optimum range of introduction volume has different.
In the present invention, addition BaO can improve the crystallization property, degree of staining and transmitance of glass in a certain range.
With the total weight of compound, when BaO content is less than 5%, above-mentioned effect is not obvious enough；When BaO content is greater than 11.9%
The crystallization trend of glass can then increased, density increase, in addition, the increase of BaO content is to washing fastness RP(S), alkali resistance ROH
(S) also there is certain degradating trend.Therefore, the content of BaO should control between 5~11.9%, be preferably controlled in 7~11% it
Between, such as: the content of BaO can be 5.5%, 6%, 6.5%, 7.5%, 8%, 8.5%, 9,9.5%, 10%, 10.5%,
11.5% etc..
When in glass system disclosed in this invention using the part SrO substitution BaO, be conducive to the reduction of glass density,
And washing fastness R can be alleviatedP(S), alkali resistance ROH(S) deterioration degree.With the total weight of compound, the content of SrO
When less than 10.1%, above-mentioned effect is not obvious enough；When the content of SrO is greater than 15%, then the crystallization trend of glass can be made to increase.
So the content of SrO should control between 10.1~15%, it is preferably controlled between 10.1%~13%, such as: SrO's contains
Amount can be 10%, 10.5%, 11.5%, 12%, 12.5%, 13.4%, 14.5% etc..
In the present invention, addition CaO can improve the crystallization property and transmitance of glass in a certain range, use CaO
Be conducive to the reduction of glass density when the substitution BaO of part.It is above-mentioned when CaO content is less than 4% with the total weight of compound
Effect is not obvious enough；When CaO content is greater than 8% the crystallization trend of glass can then increased.So in the present invention, CaO
Content should control between 4-8%, be preferably controlled between 4%~7%, for example, the content of CaO can be 4.5%, 5%,
5.5%, 6.5% etc..
The crystallization property of glass can be made to be deteriorated when ∑ (BaO+SrO+CaO) is too low with the total weight of compound, and
The degree of staining of glass, transmitance are difficult to achieve the desired results, and when ∑ (BaO+SrO+CaO) is excessively high, then can make washing fastness RP
(S), alkali resistance ROH(S) it is difficult to achieve the desired results.So in the present invention, with the total weight of compound, ∑ (BaO+SrO
+ CaO) be preferably 20~29%, more preferably between 21%~28%, for example, ∑ (BaO+SrO+CaO) can be 22%,
23%, 23.5%, 24%, 24.5%, 25%, 25.5%, 26%, 27% etc..
It can make glass when the ratio between the content of BaO and the content of SrO BaO/SrO are excessively high with the total weight of compound
Density increases, and washing fastness RP(S), alkali resistance ROH(S) it can also be deteriorated.So in the present invention, with the gross weight of compound
The ratio between the content of meter, the content of the BaO and SrO BaO/SrO is less than or equal to 1, preferably between 0.4-0.9, such as
The ratio between the content of BaO and the content of SrO BaO/SrO can be 0.2,0.3,0.5,0.6,0.7,0.8 etc..
In the present invention, ZrO2Have the function of improving devitrification resistance, can also be played in most lanthanum crown optical glass
It improves refractive index and reduces the effect of dispersion, be in the present invention necessary addO-on therapy.With the total weight of compound, ZrO2Contain
When amount is less than 1%, this effect is not obvious enough；And ZrO2When content is greater than 4%, the crystallization property of glass can gradually be deteriorated, and melt
It refines temperature to increase, and to washing fastness RP(S), alkali resistance ROH(S) certain deterioration also acts on.So ZrO2Content answer
Control is preferably controlled between 1%~3.5%, between 1%~4% for example, ZrO2Content can be 1.5%, 2%,
2.5%, 3% etc..
In the present invention, ZnO can reduce tendency towards devitrification, the transition temperature Tg for reducing glass and the slackened temperature of glass
Ts, and improve washing fastness RP(S), alkali resistance ROH(S) excellent effect.With the total weight of compound, ZnO content is less than
When 1%, this effect is not obvious enough；When ZnO content is greater than 5%, the viscosity of glass will be gradually become smaller, and acid resistance will gradually become
Difference.So the content of ZnO should control between 1%~5%, preferably between 1%~4%, for example, the content of ZnO can be
1.5%, 2%, 2.5%, 3%, 3.5%, 4.5% etc..
In the present invention, Li2O has effective fluxing action in glass, and the transformation of glass can be effectively reduced
Temperature Tg and slackened temperature Ts is added in a certain range to improvement washing fastness RP(S), alkali resistance ROH(S) effect is obvious.With
The total weight of compound, Li2When O content is less than 0.5%, this effect is not obvious enough；Li2When O content is greater than 3%, to resistance to
Washing performance RP(S), alkali resistance ROH(S) effect has certain degradating trend, and excessive Li instead2O can then destroy glass
Network makes the crystallization property of glass be deteriorated.So Li2The content of O should control between 0.5%~3%, preferably 0.5%~
Between 2.5%, such as: Li2The content of O can be 0.8%, 1%, 1.2%, 1.5%, 1.8%, 2%, 2.2%, 2.8% etc..
Sb2O3It is to be added as defrother, but its content is sufficient within 0.3%, and Sb2O3If being more than
0.3% can make glass coloration degree and internal transmitance be deteriorated.Therefore Sb2O3Constituent content is limited to 0.01~0.3%, preferably exists
0.01~0.1%.
In the present invention, it is preferred to not contain TiO2、Gd2O3、Y2O3、Na2O、K2O、MgO、Al2O3And/or Nb2O5Equal ingredients.
In order to guarantee the realization of every subject invention of the invention, optical glass provided by the invention can not be artificially introduced and remove
Other elements other than the above component, i.e., the above component total content are 100%.
In the composition of lanthanum crown optical glass, La2O3、Ta2O5、Gd2O3、Al2O3、Y2O3Effect have similarity, pass through
The rational proportion of other components is adjusted, to obtain the optical glass haveing excellent performance.But La2O3、Ta2O5、Gd2O3、Y2O3Valence
Lattice are not quite similar, such as: Y2O3The market price about compare La2O3It is high by 20%, and Gd2O3The market price be La2O32 times or more,
Ta2O5Price is La2O315 times or more.
However, the present invention is by using La2O3The Y of all or part of fictitious hosts valuableness2O3、Gd2O3And Ta2O5Ingredient leads to
Cross makes glass properties holding not deteriorate and be able to achieve with the rational proportion of other components stably produces, obtains a kind of lanthanum corona
Glass.Refractive index (the n of the lanthanum crown optical glassd) between 1.62~1.68, Abbe number (υd) between 56~60, and
With at low cost, easily soften, the characteristics of density is low, and washing fastness, alkali resistance are good, and transmitance is good, suitable for producing.
In the present invention, the transition temperature Tg of the lanthanum crown optical glass is at 610 DEG C hereinafter, slackened temperature Ts is at 660 DEG C
Below；And/or the density of the optical glass is in 3.60g/cm3Below；And/or the washing fastness of the lanthanum crown optical glass
RPIt (S) is 1~3 grade, the alkali resistance R of the lanthanum crown optical glassOHIt (S) is 1 grade.
In the present invention, the degree of staining λ of the lanthanum crown optical glass80/λ5In λ80In 355nm hereinafter, λ5275nm with
Under；And/or inside transmitance of the lanthanum crown optical glass at 450nm, 99.5% or more, the inside at 360nm is saturating
Rate is crossed 93% or more.
The present invention also provides a kind of optical elements comprising lanthanum crown optical glass according to the present invention.
The present invention also provides a kind of preparation methods of lanthanum crown optical glass according to the present invention comprising by the lanthanum corona
The step of learning each component mixing of glass.
Specifically, it is weighed respectively in defined ratio, after being mixed into batch, in 1220 DEG C in the crucible of platinum production
Melting is carried out at a temperature of~1270 DEG C, after raw material is melted into glass metal, 1290 DEG C~1340 DEG C is raised the temperature to and opens
It opens and is stirred, is homogenized using the blender that platinum material makes, mixing time is controlled in 5~10h.After the completion of stirring, heating
To 1340 DEG C~1380 DEG C and keep the temperature 5~10h, clarified, bubble made sufficiently to float, then cool the temperature to 1050 DEG C~
1150 DEG C of casting or leakage note are in molding die or through being pressed and molded, and finally processing obtains lanthanum corona of the invention after annealing
Glass or optical element.
Embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and should not be taken as limiting the scope of the invention.It is not specified in embodiment specific
Condition person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer is
It can be with conventional products that are commercially available.
The each component of embodiment 1-11 in table 3-4 is weighed in defined ratio respectively, after being mixed into batch, in platinum
It raises the temperature to 1320 DEG C after raw material is melted into glass metal in 1250 DEG C of progress meltings in the crucible of gold production and opens
It is stirred, is homogenized using the blender that platinum material makes, mixing time is controlled in 8h.After the completion of stirring, it is warming up to 1360
DEG C and keep the temperature 8h, clarified, bubble made sufficiently to float, then cool the temperature to 1100 DEG C casting or leakage note in molding die
Or through being pressed and molded, finally processing obtains lanthanum crown optical glass of the invention after annealing.
Comparative example
The corresponding raw material of each component of comparative example A-C in table 4 is weighed in defined ratio respectively, using with embodiment 1-
Prepared by 11 identical preparation methods, obtain the lanthanum crown optical glass of comparative example A-C.
Performance test
1, refractive index nd, Abbe number υd
Refractive index (nd) and Abbe number (υd) test be to be surveyed according to the test method of GB/T 7962.1-2010 standard
It is fixed.
2, transition temperature Tg and slackened temperature Ts
The test of transition temperature (Tg) and slackened temperature (Ts) is the test method according to GB/T 7962.16-2010 standard
It carries out.
3, density p
The measurement of density is carried out according to the test method of GB/T 7962.20-2010 standard.
4, washing fastness RP(S)
Washing fastness RP(S) test method of (surface method) are as follows: the 35mm × 35mm × 8mm sample for polishing six faces, leaching
The Na that it is 50 DEG C ± 3 DEG C that stain is constant in temperature, concentration is 0.01mol/L and is sufficiently stirred5P3O101 hour in aqueous solution.According to
The average value of quality, unit mg/ (cm are leached in unit area2H), by optical glass wash resistant effect stability RP (S) point
For Pyatyi, it is shown in Table 1:
Table 1
5, alkali resistance ROH(S)
Alkali resistance ROH(S) test method of (surface method) are as follows: six faces are polished into the sample having a size of 40 × 40 × 5mm, leaching
Stain in be sufficiently stirred, temperature it is constant be 50 DEG C ± 3 DEG C, concentration be 0.01mol/L sodium hydrate aqueous solution in 15 hours.According to
The average value of quality, unit mg/ (cm are leached in unit area215h), by the alkaline-resisting effect stability R of lanthanum crown optical glassOH
(S) it is divided into Pyatyi, is shown in Table 2:
Table 2:
6, degree of staining λ80/λ5
Degree of staining λ80/λ5Middle λ80Be meant that corresponding wavelength when glass tranmittance is 80% (thickness of sample is 10 ±
0.1mm), λ5Refer to that glass transmittance reaches corresponding wavelength when 5%.It is according to Japanese glass industry association JOGIS02-2003
" optical glass degree of staining measuring method " measurement.
7, internal transmitance τ10
Inside transmitance τ of the invention10Be meant that with a thickness of 10 ± 0.1mm glass respectively wavelength be 360nm,
Inside transmission measurement value when 450nm, is tested according to GB/T7962.12-2010 standard.
By the refractive index n of lanthanum crown optical glass made from embodiment 1-11 and comparative example A-Cd, Abbe number υd, transformation temperature
Spend Tg, slackened temperature Ts, density p, degree of staining λ80/λ5, washing fastness RP(S), alkali resistance ROH(S) and internal transmitance τ10,
It is listed in table 3-4；Comparative example A-C is listed in Table 4 below through measuring obtained data.
Table 3
Table 4
It can be seen from table 3-4 the transition temperature Tg of the lanthanum crown optical glass of the embodiment of the present invention 1-11 610 DEG C with
Under, slackened temperature Ts is at 660 DEG C hereinafter, density is in 3.60g/cm3Hereinafter, washing fastness RPIt (S) is 1~3 grade, alkali resistance ROH
It (S) is 1 grade.The degree of staining λ of the lanthanum crown optical glass80/λ5In λ80In 355nm hereinafter, λ5In 275nm or less；The lanthanum
Inside transmitance of the crown optical glass at 450nm is 99.5% or more, and the inside transmitance at 360nm is 93% or more.
Therefore, lanthanum crown optical glass of the invention is had excellent performance, and has easily softening, and density is low, washing fastness, alkali resistance are good, penetrates
The features such as rate is good.
SiO in Comparative examples A2Content and B2O3Content it is relatively high, although to washing fastness RP(S), alkali resistance ROH
(S) deterioration degree is smaller, but its excessive Li2O ingredient is then to washing fastness RP(S), alkali resistance ROH(S) deterioration effect compared with
Greatly.And SiO in Comparative examples A2、B2O3、La2O3、BaO、SrO、ZnO、Li2O、Sb2O3Equal constituent contents are not in the scope of the present invention
It is interior, SiO2/B2O3, ∑ (BaO+SrO+CaO), BaO/SrO value also not within the scope of the invention, the washing fastness R of glassP
(S), alkali resistance ROH(S) poor compared to embodiments herein 1-11.
Comparative example B contains a small amount of TiO2Although TiO2It can be used for adjusting nd、υdMatching, but a small amount of introduce will make
Deteriorate at degree of staining and transmitance, and B in comparative example B2O3、La2O3、SrO、ZrO2、ZnO、Li2The content of the components such as O does not exist
In the scope of the present invention, SiO2/B2O3, ∑ (BaO+SrO+CaO), BaO/SrO value also not within the scope of the invention, glass
nd、υdNot within the scope of the invention, 80/ λ 5 of λ, internal transmitance τ10It is poor compared to embodiments herein 1-11.
Li is not contained in comparative example C2O ingredient, and B2O3, ZnO content it is low, lead to transition temperature Tg and slackened temperature Ts
It is excessively high, it is unfavorable for extending the service life of mold when die mould produces, introduces more Gd2O3Ingredient is increasing the same of density
When, will necessarily also product cost be made to be significantly increased.SrO, CaO, Li in comparative example C2O、Sb2O3Equal constituent contents are not in the present invention
In the range of, and ∑ (BaO+SrO+CaO), BaO/SrO value are also not within the scope of the invention, the transition temperature Tg of glass and
Slackened temperature Ts is poor compared to embodiments herein 1-11.
The above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be to the present invention
Embodiment restriction.For those of ordinary skill in the art, it can also make on the basis of the above description
Other various forms of variations or variation.There is no necessity and possibility to exhaust all the enbodiments.It is all of the invention
Made any modifications, equivalent replacements, and improvements etc., should be included in the protection of the claims in the present invention within spirit and principle
Within the scope of.
Claims (10)
1. a kind of lanthanum crown optical glass, which is characterized in that with the total weight of compound, including following components:
SiO2: 18~22%；
B2O3: 30.1~34%；
La2O3: 18.5~23%；
BaO:5~11.9%；
SrO:10.1~15%；
CaO:4~8%；
ZrO2: 1~4%；
ZnO:1~5%；
Li2O:0.5~3%；
Sb2O3: 0.01~0.3%；
Above-mentioned percentage is weight percentage.
2. lanthanum crown optical glass according to claim 1, which is characterized in that with the total weight of compound, the SiO2's
Additional amount is 19~21.5%；And/or the B2O3Additional amount be 30.5~33%；And/or the La2O3Additional amount
It is 19~21.5%；And/or the additional amount of the BaO is 7~11%；And/or the additional amount of the SrO be 10.1~
13%；And/or the additional amount of the CaO is 4~7%；And/or the ZrO2Additional amount be 1~3.5%；And/or institute
The additional amount for stating ZnO is 1~4%；The Li2The additional amount of O is 0.5~2.5%；The Sb2O3Additional amount be 0.01~
0.1%.
3. lanthanum crown optical glass according to claim 1 or 2, which is characterized in that described with the total weight of compound
SiO2Content and the B2O3The ratio between content SiO2/B2O3It is 0.55~0.75.
4. lanthanum crown optical glass according to claim 1-3, which is characterized in that with the total weight of compound,
∑ (BaO+SrO+CaO) is 20~29%.
5. lanthanum crown optical glass according to claim 1-4, which is characterized in that with the total weight of compound,
The ratio between the content of the BaO and the content of the SrO BaO/SrO are less than or equal to 1.
6. lanthanum crown optical glass according to claim 1-5, which is characterized in that the folding of the lanthanum crown optical glass
Penetrate rate ndBetween 1.62~1.68, Abbe number υdBetween 56~60.
7. lanthanum crown optical glass according to claim 1-6, which is characterized in that the lanthanum crown optical glass turns
Temperature Tg is at 610 DEG C hereinafter, slackened temperature Ts is at 660 DEG C or less；And/or the density of the lanthanum crown optical glass exists
3.60g/cm3Below；And/or the washing fastness R of the lanthanum crown optical glassPIt (S) is 1~3 grade, the lanthanum crown optical glass
Alkali resistance ROHIt (S) is 1 grade.
8. lanthanum crown optical glass according to claim 1-7, which is characterized in that the lanthanum crown optical glass
Coloration λ80/λ5In λ80In 355nm hereinafter, λ5In 275nm or less；And/or the lanthanum crown optical glass at the 450nm in
Portion's transmitance is 99.5% or more, and the inside transmitance at 360nm is 93% or more.
9. a kind of preparation method of lanthanum crown optical glass according to claim 1-8, which is characterized in that including inciting somebody to action
The step of each component mixing of the lanthanum crown optical glass.
10. a kind of optical element, which is characterized in that including lanthanum crown optical glass according to claim 1-8.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112551888A (en) * | 2020-12-30 | 2021-03-26 | 湖北新华光信息材料有限公司 | Optical glass, method for producing same, and optical element |
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| CN1244851A (en) * | 1997-01-29 | 2000-02-16 | 康宁股份有限公司 | Glasses with very high refractive index |
| US20070249482A1 (en) * | 2001-08-02 | 2007-10-25 | 3M Innovative Properties Company | Al2O3-RARE EARTH OXIDE-ZrO2/HfO2 MATERIALS, AND METHODS OF MAKING AND USING THE SAME |
| WO2011046156A1 (en) * | 2009-10-15 | 2011-04-21 | 旭硝子株式会社 | Glass for diffusion layer in organic led element, and organic led element utilizing same |
| JP2016121035A (en) * | 2014-12-24 | 2016-07-07 | 株式会社オハラ | Optical glass, preform and optical element |
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| CN1244851A (en) * | 1997-01-29 | 2000-02-16 | 康宁股份有限公司 | Glasses with very high refractive index |
| CN1198414A (en) * | 1997-03-25 | 1998-11-11 | 株式会社小原 | Optical glass with negative anomalous dispersion |
| US20070249482A1 (en) * | 2001-08-02 | 2007-10-25 | 3M Innovative Properties Company | Al2O3-RARE EARTH OXIDE-ZrO2/HfO2 MATERIALS, AND METHODS OF MAKING AND USING THE SAME |
| WO2011046156A1 (en) * | 2009-10-15 | 2011-04-21 | 旭硝子株式会社 | Glass for diffusion layer in organic led element, and organic led element utilizing same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112551888A (en) * | 2020-12-30 | 2021-03-26 | 湖北新华光信息材料有限公司 | Optical glass, method for producing same, and optical element |
| CN112551888B (en) * | 2020-12-30 | 2022-08-19 | 湖北新华光信息材料有限公司 | Optical glass, method for producing same, and optical element |
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