CN102849942B - Environment-friendlylanthanum lanthanum flint - Google Patents
Environment-friendlylanthanum lanthanum flint Download PDFInfo
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- CN102849942B CN102849942B CN201110389342.3A CN201110389342A CN102849942B CN 102849942 B CN102849942 B CN 102849942B CN 201110389342 A CN201110389342 A CN 201110389342A CN 102849942 B CN102849942 B CN 102849942B
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- friendlylanthanum
- environment
- flint
- refractive index
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Abstract
Name of the present invention is called Environment-friendlylanthanum lanthanum flint.Belong to optical glass having high refractive index technical field.It mainly provides a kind of high refractive low dispersive environmental protection lanthanide flint optical glass.Its principal character is that its compositional range contains in compound by weight percentage: SiO
2: 2 ~ 5%; B
2o
3: 25 ~ 32%; ZnO:1 ~ 3%; La
2o
3: 30 ~ 40%; ZrO
2: 3 ~ 6%; Nb
2o
5: 0.1 ~ 3%; Gd
2o
3: 16 ~ 23%; Ta
2o
5: be 1 ~ 3%.The present invention has not containing Li
2the alkali metal components such as O, not containing the WO easily causing glass coloring
3and TiO
2, containing volatile and also to human body and and the fluorochemical of bad environmental, containing the easy rich long-pending SnO of deposition
2, refractive index n d is 1.74 ~ 1.80, and Abbe number υ d is 45 ~ 55, the feature that degree of staining (λ 80/ λ 5) is less than 380/310, is mainly used in Environment-friendlylanthanum lanthanum flint.
Description
Technical field
The invention belongs to optical glass having high refractive index technical field.Be specifically related to a kind of Environment-friendlylanthanum lanthanum flint, it has specific refractory power be nd is 1.74 ~ 1.80, and Abbe number υ d is 45 ~ 55.
Background technology
In traditional opticglass, general containing elements such as lead, arsenic, cadmiums.Along with the development of society, people to the enhancing gradually of environmental consciousness, the traditional optical glass contained hazardous substance just progressively replace by environmental protection optical glass.Along with the precise treatment of optical system, the development of miniaturization, particularly household digital camera, toward frivolous future development, this just needs to adopt high-refractivity and low-dispersion glass to manufacture camera lens, and glass of the present invention just belongs to the category of high-refractivity and low-dispersion.
Group of the lanthanides glass of high refractive index disclosed in CN1935717A, CN101282915A, CN1187277C, CN101282915A, CN1495137A, all contains Li in its component
2o.
Group of the lanthanides glass of high refractive index disclosed in CN101229955A, CN10100341A, Nb in this opticglass
20
5component concentration higher, add the tendency towards devitrification of glass.
Group of the lanthanides glass of high refractive index disclosed in CN1187277C, CN101012102A, containing WO in component
3, large to the coloration effects of glass.
Containing SnO in CN201010131367 patent
2, SnO
2although be improved the effect of glass coloring degree, its infusibility, easily separates out rich long-pending blocking material pipe.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of Environment-friendlylanthanum lanthanum flint, the material that not leaded in this opticglass, arsenic, cadmium, mercury etc. are harmful to environment and human body, the specific refractory power (nd) of opticglass is 1.74 ~ 1.80, Abbe number (υ d) is 45 ~ 55, and colourity (λ 80/ λ 5) is less than 380/310.
The technical scheme that technical solution problem of the present invention adopts is: a kind of Environment-friendlylanthanum lanthanum flint, is characterized in that: its compositional range contains in compound by weight percentage:
SiO
2：2～5%；
B
2O
3：25～32%；
ZnO：1～3%
La
2O
3：30～40%；
ZrO
2：3～6%；
Gd
2O
3：16～23%；
Ta
2O
5：1～3%；
Nb
2O
5：0～3%；
The specific refractory power of opticglass is 1.74 ~ 1.80, and Abbe number is 45 ~ 55, and degree of staining is less than 380/310.
The ∑ Nb described in technical scheme that technical solution problem of the present invention adopts
2o
5+ Ta
2o
5: 1 ~ 5%.
B
2o
3be that glass network generates oxide body, be improved the effect of stability, glass and hydrotropy in glass, in lanthanide flint optical glass system, if B
2o
3content is too low, material difficulty and reduce the crystallization property of glass, if too high levels, glass viscosity is too small, in shaping process, easily go out striped, unfavorable to production.And be difficult to the requirement reaching high refractive index.So B
2o
3content controls 25 ~ 32% more satisfactory.
SiO
2and B
2o
3the same is also that glass network generates body, and it mainly increases glass viscosity, and improve crystallization property and the chemical stability of glass, if too high levels, then glass viscosity is excessive, can cause difficult forming, and is unfavorable for the raising of glass refraction, therefore SiO
2desired contents be 2 ~ 5%
ZnO is conducive to the softening temperature and the raising crystallization property that reduce glass, if but too high levels, the crystallization property of glass can be reduced on the contrary.So the content of ZnO is 1 ~ 3%.
La
2o
3be the necessary component of glass of the present invention, it can improve the specific refractory power of glass, improves the chemical stability of glass.If its content exceedes height, then devitrification of glass tendency increases; If content is too small, do not reach above-mentioned technical requirements, so La
2o
3content be 30 ~ 40%.
Gd
2o
3and La
2o
3character close, but its dispersion is lower, suitable use Gd
2o
3substitute For Partial La
2o
3contribute to the dispersion reducing glass, Gd in the present invention
2o
3content is 16 ~ 23%;
Nb
2o
5be mainly used in the specific refractory power improving glass, but it can cause devitrification of glass to be inclined to increase.Therefore Nb
2o
5content be 0.1 ~ 3%.
Ta
2o
5also mainly play the effect improving glass refraction, it compares Nb to the side effect of crystallization property
2o
5good, but time its price higher, need few interpolation, so Ta from cost consideration
2o
5content be 1 ~ 3% to be advisable.
ZrO
2the chemical stability of glass can be improved and improve the effect of specific refractory power in lanthanide glass.Due to ZrO
2glass melting temperature can be improved, so general consumption is less.So ZrO
2content be 3 ~ 6%.
TiO
2although the specific refractory power of glass can be improved, glass coloring degree can be caused seriously to be deteriorated, so do not add in this patent, and to adopt La
2o
3, Ta
2o
5, Nb
2o
5improve the specific refractory power of glass.
WO
3and TiO
2equally can improve glass refraction, but glass coloring degree also can be caused seriously to be deteriorated, so do not add in this patent, and adopt La
2o
3, Ta
2o
5, Nb
2o
5improve the specific refractory power of glass.
Li
2although O can improve the degree of staining of glass, because the specific refractory power of itself is too low, add the glass being difficult to obtain high refraction after in glass to, and chemical durability of glass can be caused to be deteriorated, so do not add in this patent.
The present invention is owing to adopting the component of following content, SiO
2: 2 ~ 5%; B
2o
3: 25 ~ 32%; ZnO:1 ~ 3%; La
2o
3: 30 ~ 40%; ZrO
2: 3 ~ 6%; Nb
2o
5: 0 ~ 3%; Gd
2o
3: 16 ~ 23%; Ta
2o
5: be 1 ~ 3%, not containing being unfavorable for the small molecules oxide compound improving glass refraction, as Li
2o, Na
2o, K
2the alkali metal components such as O, not containing the WO easily causing glass coloring
3and TiO
2, containing volatile and also to human body and and the fluorochemical of bad environmental, containing the easy rich long-pending SnO of deposition
2, can avoid the tendency towards devitrification of glass, little to the coloration effects of glass, meltable, the richness not easily separating out blocking material pipe is amassed.Although Nb
2o
5and Ta
2o
5the specific refractory power of glass can be improved significantly, but too high levels can reduce the crystallization property of glass, and cost of material is higher, added multipair cost unfavorable, in order to when not reducing glass properties and increasing excessive cost, to obtain nd be 1.74 ~ 1.80, the opticglass that degree of staining (λ 80/ λ 5) is less than 380/310, so the present invention limits ∑ Nb
2o
5+ Ta
2o
5: 1 ~ 5%.It is 1.74 ~ 1.80 that the present invention has refractive index n d, and Abbe number υ d is 45 ~ 55, the feature that degree of staining (λ 80/ λ 5) is less than 380/310.The present invention is mainly used in high-refractivity and low-dispersion environmental protection lanthanide flint optical glass.
Embodiment
5 embodiments of the present invention and 3 comparative examples as shown in table 1.
Embodiment as can be seen from table 1 and comparative example, add TiO
2and WO
3the degree of staining of rear glass obviously reduces, and is embodied in the color burn of glass, and adds TiO
2and WO
3the dispersion of rear glass obviously increases, unfavorable to the dispersion reducing glass.Add Li
2after O, the degree of staining of glass increases, and dispersion also reduces to some extent, but the specific refractory power of glass reduces serious, unfavorable to the specific refractory power improving glass, and Li
2o is very serious to the erosion of quartz crucible, can shorten the work-ing life of quartz crucible.
Claims (2)
1. an Environment-friendlylanthanum lanthanum flint, is characterized in that: its compositional range is made up of following compound by weight percentage:
SiO
2：2～5%；
B
2O
3：25～32%；
ZnO：1～3%；
La
2O
3：40%；
ZrO
2：3～6%；
Gd
2O
3：16～23%；
Ta
2O
5：1～3%；
Nb
2O
5：0.1～3%；
The specific refractory power (nd) of opticglass is 1.74 ~ 1.80, and Abbe number (υ d) is 45 ~ 50, and degree of staining (λ 80/ λ 5) is less than 375/305.
2. Environment-friendlylanthanum lanthanum flint according to claim 1, is characterized in that: Nb
2o
5+ Ta
2o
5: 1 ~ 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110389342.3A CN102849942B (en) | 2011-11-30 | 2011-11-30 | Environment-friendlylanthanum lanthanum flint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110389342.3A CN102849942B (en) | 2011-11-30 | 2011-11-30 | Environment-friendlylanthanum lanthanum flint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102849942A CN102849942A (en) | 2013-01-02 |
| CN102849942B true CN102849942B (en) | 2015-11-25 |
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ID=47396989
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110389342.3A Active CN102849942B (en) | 2011-11-30 | 2011-11-30 | Environment-friendlylanthanum lanthanum flint |
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| Country | Link |
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| CN (1) | CN102849942B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109626815B (en) * | 2019-01-23 | 2021-10-01 | 成都光明光电股份有限公司 | Optical glass, glass preform, optical element and optical instrument |
| CN114133226B (en) * | 2021-12-30 | 2022-11-08 | 苏州晶生新材料有限公司 | Optical coating substrate and using method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1532160A (en) * | 2003-03-24 | 2004-09-29 | 上海新沪玻璃厂 | High refractivity lanthanum optical glass laSF015 |
| CN101973703A (en) * | 2010-10-29 | 2011-02-16 | 南通晶鑫光学玻璃有限公司 | Environment-friendly lanthanide series optical glass TZLaF8 with high refractive index and low chromatic dispersion |
| CN102050571A (en) * | 2009-11-06 | 2011-05-11 | 湖北新华光信息材料股份有限公司 | Optical glass with high index of refraction |
| WO2011131105A1 (en) * | 2010-04-19 | 2011-10-27 | 成都光明光电股份有限公司 | Optical glass and optical element |
-
2011
- 2011-11-30 CN CN201110389342.3A patent/CN102849942B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1532160A (en) * | 2003-03-24 | 2004-09-29 | 上海新沪玻璃厂 | High refractivity lanthanum optical glass laSF015 |
| CN102050571A (en) * | 2009-11-06 | 2011-05-11 | 湖北新华光信息材料股份有限公司 | Optical glass with high index of refraction |
| WO2011131105A1 (en) * | 2010-04-19 | 2011-10-27 | 成都光明光电股份有限公司 | Optical glass and optical element |
| CN101973703A (en) * | 2010-10-29 | 2011-02-16 | 南通晶鑫光学玻璃有限公司 | Environment-friendly lanthanide series optical glass TZLaF8 with high refractive index and low chromatic dispersion |
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|---|---|
| CN102849942A (en) | 2013-01-02 |
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