CN106904825A - A kind of optical glass - Google Patents
A kind of optical glass Download PDFInfo
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- CN106904825A CN106904825A CN201710178456.0A CN201710178456A CN106904825A CN 106904825 A CN106904825 A CN 106904825A CN 201710178456 A CN201710178456 A CN 201710178456A CN 106904825 A CN106904825 A CN 106904825A
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- optical glass
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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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- 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)
- Glass Compositions (AREA)
Abstract
The invention discloses a kind of optical glass, the optical glass is made up of following component by weight percentage：SiO2 26~34%, B2O3 30~40%, Nb2O5 9~15%, BaO 5~11%, Al2O3 2~6%, ZnO 1~3%, MgO 1~3%, Fe2O3 2~4%, Y2O3 1~3%, Ta2O5 0.6~1.4%, Gd2O3 0.5~1.5%.And content and processing meet following condition：SiO2And B2O3Total content between 56~73%, Ta2O5And Gd2O3Total content is less than or equal to 2.8%, and below 650 DEG C, liquidus temperature LT is not higher than 910 DEG C to transition temperature Tg.Constituted more than, ensure that high index of refraction and low dispersivity, and optical glass low cost of the invention, density it is small, with excellent performances such as low tendency towards devitrifications and high transmittance, understand that the optical glass has good processing characteristics with respect to abrasive hardness FA by it again, and this kind of refraction high, the glass of low Abbe number can make up and correcting chromatic aberration, aberration is decreased in lower scope, and can at steady-state realize low cost operation and volume production.
Description
Technical field
The present invention relates to glassware field, more particularly, to a kind of optical glass.
Background technology
The direction of propagation of light can be changed, and the glass of ultraviolet, visible or infrared light relative spectral power distribution can be changed.Narrow sense
Optical glass refer to colouless optical glass；The optical glass of broad sense also includes color optical glass, laser glass, quartz-optical
Glass, radiation resistance glass, ultraviolet glasses for infrared use, fiber-optic glass, aciystio-optical glass, magneto-optic glass and phototropic glass.
Lens, prism, speculum and window that optical glass can be used to manufacture in optical instrument etc..The part being made up of optical glass is
Key element in optical instrument.
Optical glass is basis and the important component of photoelectric technology industry.Particularly after the nineties in 20th century,
As optics is merged with electronic information science, the continuous of new material science, as the optical glass of photoelectron basic material in light
Transmission, light storage and the application in the big field of photoelectric display three are even more and advance by leaps and bounds, as social informatization especially optoelectronic information
One of basic condition of technology development.
As domestic economy is lasting, stable development, Chinese Optical glass manufacture industry development is swift and violent.According to State Statistics Bureau
Data display, 2010, up to 246, industry whole year realized income from sales to optical glass manufacturing scale above number of the enterprise
It is 234.05 hundred million yuan, increases by 53.70% on a year-on-year basis；15.37 hundred million yuan are generated profit, increases by 87.10% on a year-on-year basis；Asset size reaches
264.50 hundred million yuan, increase by 77.49% on a year-on-year basis.Because optical glass manufacturing is based on home sale, financial crisis influences on it
Relatively small, industry still shows preferable growth.
With the keen competition and development in photovoltaic market, high yield, the manufacture optical material of low cost are each
The target of optical material manufacturing firm.On the other hand, the increased popularity such as digital camera, digital camera, camera cell phone in recent years,
Integrated level and function for the plant equipment of optical system increase sharply.In this case, it is desirable to which optical system reaches more
The degree of accuracy, resolution ratio high, and mitigate the weight and size of optical system.In order to meet high-grade digital product pixel high, small-sized
Light requirement, have the advantages that refraction high, the borosilicate group of the lanthanides class optical glass of low dispersion demand it is increasing.In order to
Make glass that there is above performance, the La in glass2O3、TiO2、Nb2O5, the component content such as ZnO also gradually increasing, but these into
Dividing can excessively cause the defects such as glass viscosity is small, shaping difficulty is big, be difficult acquisition better quality striped and crystallization is serious.In early days
Make that this kind of glass has contains certain Ta2O5、Gd2O3, Ta is caused because rare earth appreciates2O5、Gd2O3Price steeply rise,
To production cost and its unfavorable, but with optical glass manufacture craft, the raising of technical merit, realize the low Ta of this kind of glass2O5
The processing performance for changing and reaching stabilization has been possibly realized.
With silica as main component, with the spy such as high temperature resistant, the low coefficient of expansion, high mechanical strength, chemical property be good
Point, has prism, lens, window and speculum of particular/special requirement etc. for manufacturing to pass through various wave bands.Additionally, also have being used for greatly
Photomask blank, panel of LCD, the Video Compact Disc disk base sheet glass of scale integrated circuit manufacture；Light is along magnetic line of force side
The magneto-optic glass that plane of polarization is rotated during to by glass；Light in certain direction by the glass that transmits ultrasonic wave when, occur
The diffraction of light, reflection, converge or optical frequency shift aciystio-optical glass etc..
Chinese patent application CN1448353A discloses a kind of refractive index more than 1.88, and Abbe number is 22~28 optics glass
Glass, its Nb for containing 30~50 weight %2O5.Due to Nb2O5The prices of raw materials cost of raw material for causing optical glass high it is high；
Chinese patent application CN1569706A discloses a kind of optical glass having high refractive index and melting method.The high index of refraction optics
Contain the BaO of 16.3~40.5 weight % in the main composition of glass.If the content of BaO is too high, in the melting of frit
During, the aggressivity to smelting apparatus is strong, is unfavorable for reducing the production cost of glass.Simultaneously because the BaO tools of high level
There is vigorous erosion, be accordingly difficult to melt out the excellent glass of inherent quality；
Chinese patent application CN1510002A disclose a kind of refractive index in 1.75~1.85, Abbe number being molded into more than 35
Type optical glass, wherein containing 15.5~25% expensive Ta2O5；
Chinese patent application CN101003417A discloses a kind of environmental protection of refractive index in 1.74~1.83, Abbe number 32~47
Heavy-lanthanide flint glass, wherein containing 5~20% TiO2, easily cause photochromic effect, and be unfavorable for improving the light of glass
Through performance.
However, in recent years, in the miniaturization and the improvement marked improvement of aspect of performance of imaging len, and needing in optics
Further raising in terms of the refractive index of glass, low dispersivity and ease of processing.
The content of the invention
The purpose of the present invention is directed to the deficiencies in the prior art, there is provided a kind of density is small, refraction high, low Abbe number, good
Devitrification resistance and performance optical glass and preparation method thereof.
In order to achieve the above object, the present invention is achieved through the following technical solutions：
A kind of optical glass, is made up of following component by weight percentage：SiO2 26~34%, B2O3 30~40%,
Nb2O5 9~15%, BaO 5~11%, Al2O3 2~6%, ZnO 1~3%, MgO 1~3%, Fe2O3 2~4%, Y2O3 1~3%,
Ta2O5 0.6~1.4%, Gd2O3 0.5~1.5%；
Wherein, the optical glass is free of F, Cd, Th, Pb, As, Hg and TiO2、WO3、Na2O、K2O、GeO2、TeO2、Li2O and
Yb2O3；
The refractive index n of the optical glassdFor in the range of 1.81~1.93 and Abbe number υdIn the range of 23~28.
Further, it is made up of following component by weight percentage：SiO2 30%、B2O3 35%、Nb2O5 12%、BaO
8%、Al2O3 4%、ZnO 2%、MgO 2%、Fe2O3 3%、Y2O3 2%、Ta2O5 1%、Gd2O3 1%。
Further, wherein, by weight percentage, the SiO2 And B2O3 Total content is between 56~73%.
Further, wherein, by weight percentage, the Ta2O5 And Gd2O3Total content is less than or equal to 2.8%.
Further, the density of the optical glass is less than 3.47g/cm3。
Further, the transition temperature Tg of the optical glass is below 650 DEG C.
Further, the liquidus temperature LT of the optical glass is not higher than 910 DEG C.
Further, the relative abrasive hardness FA of the optical glass is not less than 65, and under the conditions of wavelength≤420nm thoroughly
Rate is crossed up to more than 75%.
The present invention compared with prior art, with following beneficial effect：It is expensive in composition of raw materials of the present invention
Gd2O3And Ta2O5And infusibility material ZrO2+Nb2O5Content low content it is low, and without the TiO for having an impact glass transmitance2With
WO3And the alkali metal oxide such as Li of influence glass thermal property2O、Na2O and K2O.Therefore, optical glass of the invention into
This low, density is small, good product consistency, with refraction high, low Abbe number, excellent with low tendency towards devitrification and high transmittance etc.
Performance, then understand that the optical glass has a good processing characteristics with respect to abrasive hardness FA by it, and this kind of refraction high, low
The glass of Abbe number can make up and correcting chromatic aberration, aberration is decreased in lower scope, and can be real at steady-state
Existing low cost operation and volume production.
Specific embodiment
In optical glass obtained in the present invention, every kind of component of above-mentioned content is selected by reason described below, it is as follows
In described, the content of each component is with percentage by weight（wt%）Come what is represented.
SiO2It is the key component for forming the structural framework of glass.SiO2Content be preferably more than 10 weight % simultaneously
And 40 below weight %.Glass structure is stabilized for more than 10 weight % by making content.By making content be 40 weight %
Hereinafter keep glass good dissolubility.
B2O3It is also the key component for forming glass structure skeleton.B2O3Content be preferably more than 30 weight % simultaneously
And 40 below weight %.Its reason is to be stabilized glass structure for more than 30 weight % by making content, and by making
Content is to be easily achieved refractive index high below 40 weight %.
Nb2O5With the effect for making glass high index of refraction.If Nb2O5Content it is very few, then the effect above is possible to not
Fully, therefore, the Nb of this glass2O5Content is more than 5%.It is preferred that Nb2O5Content is more than 9%.On the other hand, if Nb2O5
Content it is excessive, then glass becomes unstable, thus this glass Nb2O5Content is less than 15%.
BaO is shown the stabilized effect of glass structure while the optical constant of high index of refraction and low dispersivity is obtained
Really.Additionally, by adding Ba (NO3)2The raw material of form, it is also possible to it is contemplated that by from raw material eliminate bubble manufacture glass when
Defoaming effect.However, when a large amount of BaO are added, liquidus temperature LT is raised on the contrary, therefore, glass is easily due in glass system
Crystallization during making and devitrification.Therefore, the content of BaO is preferably more than 5 weight % and below 10 weight %, to obtain
Need optical characteristics.
Al2O3It is the component for improving glass structure stability.Al2O3By improving the viscosity of glass and reducing crystal
Grow and play such effect：When pressing mold shaping temperature range is maintained at, failure is not caused as being attributable to micro- devitrification
It is muddy.By making Al2O3Content for total content more than 2 weight % and below 6 weight %, can effectively show with
Upper effect.Work as Al2O3Content more than 6 weight % when, be easy to produce the muddiness for being attributable to micro- devitrification on the contrary.
ZnO, MgO and Fe2O3Show the effect of improvement glass biodissolution.By making its total content for more than 4 weight %,
Dissolubility can be improved.Additionally, by making total content for below 10 weight %, easily realizing refractive index high.Therefore, ZnO
Content is preferably more than 1 weight % and below 3 weight %；The content of MgO be preferably more than 1 weight % and 3 weight % with
Under；Fe2O3Content be preferably more than 2 weight % and below 4 weight %.
Y2O3It is also to improve refractive index while reducing the component of dispersivity (raising Abbe number).By making Y2O3Content be
More than the 1 weight % of total content can fully show the effect.However, work as that Y is excessively added2O3When, liquidus temperature LT is carried
Height, therefore, glass easily in glass manufacturing process due to crystallization devitrification.Therefore, Y2O3Content be preferably 1 weight % with
Upper and below 3 weight %.
Gd2O3With Ta2O5 It is similar, be can bring the refractive index that improves optical glass and meanwhile reduce dispersivity (improve Ah
Shellfish number) effect component.In order to obtain the effect, can control and contain the Gd in below the weight % of more than 0.5 weight % 1.52O3
With contain the Ta in below the weight % of more than 0.6 weight % 1.42O5 .Again because of Gd2O3With Ta2O5 It is expensive, can excessively cause
Cost of idleness increases.
With reference to embodiment, the invention will be further described.
Embodiment 1-3
It is more than 99% SiO by by purity2 、B2O3 、Nb2O5 、BaO、Al2O3、ZnO、MgO、Fe2O3 、Y2O3 、Ta2O5、
Gd2O3Respective oxide, carbonate, nitrate（Specific weight see the table below 1）It is well mixed, then melting, stirring, clear
The operation treatment such as clearly, cast and anneal, refraction high of the invention, low Abbe number optical glass are just obtained after cooling and machine-shaping
（Processing and processability see the table below 2）.
Wherein, the optical glass is free of F, Cd, Th, Pb, As, Hg and TiO2、WO3、Na2O、K2O、GeO2、TeO2、
Li2O and Yb2O3。
Table one：
Table two：
| Project | Numerical value |
| 1.81~1.93 | |
| 23~28 | |
| Density p | |
| Transition temperature Tg | 650 DEG C of ＜ |
| Liquidus temperature LT | 910 DEG C of ＜ |
| With respect to abrasive hardness FA | ≥65 |
| Transmitance | Transmitance is up to more than 75% under the conditions of wavelength≤420nm |
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, although with reference to the foregoing embodiments
The present invention is described in detail, for a person skilled in the art, it still can be to foregoing embodiments institute
The technical scheme of record is modified, or carries out equivalent to which part technical characteristic.It is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (8)
1. a kind of optical glass, it is characterised in that be made up of following component by weight percentage：SiO2 26~34%, B2O3
30~40%, Nb2O5 9~15%, BaO 5~11%, Al2O3 2~6%, ZnO 1~3%, MgO 1~3%, Fe2O3 2~4%, Y2O3
1~3%, Ta2O5 0.6~1.4%, Gd2O3 0.5~1.5%；
Wherein, the optical glass is free of F, Cd, Th, Pb, As, Hg and TiO2、WO3、Na2O、K2O、GeO2、TeO2、Li2O and
Yb2O3；
The refractive index n of the optical glassdFor in the range of 1.81~1.93 and Abbe number υdIn the range of 23~28.
2. a kind of optical glass according to claim 1, it is characterised in that by following component system by weight percentage
Into：SiO2 30%、B2O3 35%、Nb2O5 12%、BaO 8%、Al2O3 4%、ZnO 2%、MgO 2%、Fe2O3 3%、Y2O3 2%、Ta2O5
1%、Gd2O3 1%。
3. a kind of optical glass according to claim 1 and 2, it is characterised in that wherein, by weight percentage, described
SiO2 And B2O3 Total content is between 56~73%.
4. a kind of optical glass according to claim 1 and 2, it is characterised in that wherein, by weight percentage, described
Ta2O5 And Gd2O3Total content is less than or equal to 2.8%.
5. a kind of optical glass according to claim 1 and 2, it is characterised in that the density of the optical glass is less than
3.47g/cm3。
6. a kind of optical glass according to claim 1 and 2, it is characterised in that the transition temperature Tg of the optical glass
Below 650 DEG C.
7. a kind of optical glass according to claim 1 and 2, it is characterised in that the liquidus temperature of the optical glass
LT is not higher than 910 DEG C.
8. a kind of optical glass according to claim 1 and 2, it is characterised in that the relative grinding of the optical glass is hard
Degree FA be not less than 65, and under the conditions of wavelength≤420nm transmitance up to more than 75%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710178456.0A CN106904825A (en) | 2017-03-23 | 2017-03-23 | A kind of optical glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710178456.0A CN106904825A (en) | 2017-03-23 | 2017-03-23 | A kind of optical glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106904825A true CN106904825A (en) | 2017-06-30 |
Family
ID=59194677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710178456.0A Withdrawn CN106904825A (en) | 2017-03-23 | 2017-03-23 | A kind of optical glass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106904825A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107140824A (en) * | 2017-07-03 | 2017-09-08 | 成都光明光电股份有限公司 | Flint optical glass with heavy lanthanum |
| CN113603357A (en) * | 2020-05-04 | 2021-11-05 | 肖特股份有限公司 | Low-density optical glass |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012103A (en) * | 2002-12-27 | 2007-08-08 | Hoya株式会社 | Optical glass, press-molding glass gob and optical element |
-
2017
- 2017-03-23 CN CN201710178456.0A patent/CN106904825A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012103A (en) * | 2002-12-27 | 2007-08-08 | Hoya株式会社 | Optical glass, press-molding glass gob and optical element |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107140824A (en) * | 2017-07-03 | 2017-09-08 | 成都光明光电股份有限公司 | Flint optical glass with heavy lanthanum |
| CN107140824B (en) * | 2017-07-03 | 2019-07-30 | 成都光明光电股份有限公司 | Flint optical glass with heavy lanthanum |
| CN113603357A (en) * | 2020-05-04 | 2021-11-05 | 肖特股份有限公司 | Low-density optical glass |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170630 |
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| WW01 | Invention patent application withdrawn after publication |