CN109734305B - Colorless aluminum niobate glass and preparation method and application thereof - Google Patents
Colorless aluminum niobate glass and preparation method and application thereof Download PDFInfo
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Abstract
The invention relates to aluminum niobate glass, a preparation method and application thereof. The aluminum niobate glass contains Nb2O5：5mol%~20mol%，Al2O3：20mol%~65mol%，La2O3: 10mol% to 60mol%, BaO: 10mol% to 20mol% (but not including 10 mol%); other oxides: 0 to 10mol%, but not including 0. The invention solves the problems of high melting temperature, easy crystallization, poor glass stability and the like of the high-refractive-index glass, and can obtain the aluminum niobate glass with high refractive index and low dispersion.
Description
Technical Field
The invention belongs to the technical field of optical glass materials, and particularly relates to aluminum niobate glass and a preparation method and application thereof.
Background
The optical glass is an important component of an optical system, plays a role in optical transmission and imaging, and can be used in materials such as optical devices, optical fiber communication, optical storage and the like. The emergence of modern precision devices has increased the demands on the performance of optical materials, and the two most basic optical constants require higher refractive index and low dispersion glasses.
JP2014210435 and JP2014210436 disclose glasses containing La2O3、Nb2O5、Al2O3And BaO oxides, but the ranges of the oxides of the present invention are different therefrom and there is no intersection. The invention reduces Nb2O5The range of the oxide reduces the crystallization of the glass and increases the forming capability of the glass; BaO is 10% higher than the content in the above technique, so that the meltability of the glass can be better adjusted, the melting point of the glass is reduced, the crystallization tendency is reduced, and the refractive index of the glass is improved.
In addition, the addition of oxides such as PbO, CdO and the like is an effective method for improving the refractive index of the glass, but the raw materials have certain toxicity and serious pollution to the environment. And TiO 22、Bi2O3The addition of high refractive index oxides can severely color the glass, limiting the range of glass applications. Therefore, colorless, environmentally friendly high refractive index oxides are an essential component of high refractive index glasses.
Because high refractive index glass generally contains a large amount of refractory oxide components, it is difficult to melt the high refractive index glass by conventional heating methods to form a uniform melt, and how to melt the refractory oxide also becomes an important factor that restricts the production of optical glass. The BaO added in the invention can effectively reduce the melting point and help the glass to eliminate bubbles, and meanwhile, the BaO belongs to high-refractive-index oxide and can help to improve the refractive index of the glass.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides colorless aluminum niobate glass with excellent optical performance and physical performance and a preparation method thereof, wherein the colorless aluminum niobate glass has high refractive index, and simultaneously solves the problems of high-melting-point oxide infusibility and easy crystallization, easy bubble generation and the like of the glass prepared by the conventional method.
The technical scheme adopted by the invention for solving the problems is as follows:
a colorless aluminum niobate glass comprising Nb2O5、Al2O3、La2O3And BaO and other oxides; the other oxide is other than Nb2O5、Al2O3、La2O3And oxides other than BaO.
The present invention is not particularly limited to other compounds except Nb2O5、Al2O3、La2O3And oxides other than BaO may theoretically be used as other compounds in the present invention. Preferably, the other oxide is an oxide capable of forming a glassy state.
Preferably, the colorless aluminum niobate glass comprises the following components in percentage by mole:
the total mole sum of all the components of the colorless aluminum niobate glass is 100 percent;
it is further preferable that the concentration of the organic compound,
preferably, the other oxide includes any one or a combination of at least two of zinc oxide, calcium oxide, zirconium oxide, titanium oxide, tantalum oxide, tungsten oxide, gallium oxide, yttrium oxide, or gadolinium oxide.
Preferably, said Nb of the present invention2O5The mole percentage of (a) is 5 to 20mol%, for example 5 to 18 mol%, 5 to 16 mol%, 5 to 14 mol%, 5 to 12 mol%, 5 to 10mol%, 5 to 8 mol% and 5 to 6 mol%; for example, 7 mol% to 20mol%, 9 mol% to 20mol%, 10mol% to 20mol%, 12 mol% to 20mol%, 14 mol% to 20mol%, 15mol% to 20mol%, 17 mol% to 20mol%, and 19 mol% to 20 mol%; for example, 7 mol% to 18 mol%, 7 mol% to 16 mol%, 7 mol% to 14 mol%, 7 mol% to 12 mol%, 7 mol% to 10mol%, and 7 mol% to 9 mol%; for example, 9 to 16 mol%, 9 to 14 mol%, 9 to 12 mol%, and 9 to 10 mol%; for example, 11 mol% to 14 mol% and 11 mol% to 12 mol%; for example, 13 mol% to 14 mol%.
Preferably, Al according to the invention2O3The molar percentage of (b) is 20 to 65 mol%, for example 20 to 61 mol%, 20 to 57 mol%, 20 to 52 mol%, 20 to 48 mol%, 20 to 44 mol%, 20 to 39 mol%, 20 to 35 mol%, 20 to 31 mol%, 20 to 27 mol% and 20 to 23 mol%; for example, 24 mol% to 65 mol%, 28 mol% to 65 mol%, 32 mol% to 65 mol%, 36 mol% to 65 mol%, 40 mol% to 65 mol%, 44 mol% to 65 mol%, 48 mol% to 65 mol%, 52 mol% to 65 mol%, 56 mol% to 65 mol%, 60mol% to 65 mol%, and 64 mol% to 65 mol%; for example, 24 mol% to 61 mol%, 24 mol% to 57 mol%, 24 mol% to 53 mol%, 24 mol% to 49 mol%, 24 mol% to 45 mol%, 24 mol% to 41 mol%, 24 mol% to 37 mol%, 24 mol% to 33 mol%, 24 mol% to 29 mol%, and 24 mol% to 25 mol%; for example, 28 mol% to 57 mol%, 32 mol% to 57 mol%, 36 mol% to 57 mol%, 40 mol% to 57 mol%, 44 mol% to 57 mol%, 48 mol% to 57 mol%, 52 mol% to 57 mol%, and 56 mol% to 57 mol%; for example, 32 to 53 mol%, 32 to 49 mol%, 32 to 45 mol%, 32 to 41 mol%, 32 to 37 mol%, and 32 to 33 mol%; for example, 36 mol% to 53 mol%, 36 mol% to 49 mol%, 36 mol% to 45 mol%, 36 mol% to 41 mol%, and 36 mol% to 37 mol%; for example, from 40 mol% to 49 mol% and44mol％～45mol％。
preferably, the La of the present invention2O3The molar percentage of (b) is 10mol% to 60mol%, for example 10mol% to 56 mol%, 10mol% to 52 mol%, 10mol% to 48 mol%, 10mol% to 44 mol%, 10mol% to 40 mol%, 10mol% to 36 mol%, 10mol% to 32 mol%, 10mol% to 28 mol%, 10mol% to 24 mol%, 10mol% to 20mol%, 10mol% to 16 mol%, and 10mol% to 12 mol%; for example, 14 mol% to 60mol%, 18 mol% to 60mol%, 22 mol% to 60mol%, 26 mol% to 60mol%, 30 mol% to 60mol%, 34 mol% to 60mol%, 38 mol% to 60mol%, 42 mol% to 60mol%, 46 mol% to 60mol%, 50 mol% to 60mol%, 54 mol% to 60mol%, and 58 mol% to 60 mol%; for example, 14 mol% to 56 mol%, 14 mol% to 52 mol%, 14 mol% to 48 mol%, 14 mol% to 44 mol%, 14 mol% to 40 mol%, 14 mol% to 36 mol%, 14 mol% to 32 mol%, 14 mol% to 28 mol%, 14 mol% to 24 mol%, 14 mol% to 20mol%, and 14 mol% to 16 mol%; for example, 18 mol% to 52 mol%, 18 mol% to 48 mol%, 18 mol% to 44 mol%, 18 mol% to 40 mol%, 18 mol% to 36 mol%, 18 mol% to 32 mol%, 18 mol% to 28 mol%, 18 mol% to 24 mol%, and 18 mol% to 20 mol%; for example, 22 to 48 mol%, 22 to 44 mol%, 22 to 40 mol%, 22 to 36 mol%, 22 to 32 mol%, 22 to 28 mol%, and 22 to 24 mol%; for example, 26 mol% to 44 mol%, 26 mol% to 40 mol%, 26 mol% to 36 mol%, 26 mol% to 32 mol%, and 26 mol% to 28 mol%; for example, 30 mol% to 40 mol%, 30 mol% to 36 mol%, and 30 mol% to 32 mol%; for example, 34 mol% to 36 mol%.
Preferably, the molar percentage of BaO according to the invention is between 10mol% and 20mol% (but not 10 mol%), such as between 11 mol% and 19 mol%, between 11 mol% and 17 mol%, between 11 mol% and 14 mol% and between 11 mol% and 12 mol%; for example, 13 mol% to 20mol%, 14 mol% to 20mol%, 15mol% to 20mol%, 17 mol% to 20mol%, and 19 mol% to 20 mol%; for example, 12 mol% to 18 mol%, 12 mol% to 16 mol%, 12 mol% to 14 mol%, 12 mol% to 13 mol%; for example, 13 mol% to 17 mol%, 13 mol% to 16 mol%, 13 mol% to 15mol%, and 13 mol% to 14 mol%; for example, 14 mol% to 16 mol% and 14 mol% to 15 mol%.
Preferably, the colorless aluminum niobate glass has a refractive index of 1.8 to 2.3, such as 1.8, 1.85, 1.9, 1.95, 2.0, 2.05, 2.1, 2.15, 2.2, 2.25, 2.3, and the like.
Preferably, the abbe number of the aluminum niobate glass is 25 to 45, such as 25, 28, 33, 37, 42, 45 and the like.
Preferably, the aluminum niobate glass has a stability Δ T of 60 to 260 ℃, for example, 60 ℃, 80 ℃, 100 ℃, 120 ℃, 140 ℃, 160 ℃, 180 ℃, 200 ℃, 220 ℃, 240 ℃, 260 ℃ and the like.
The invention also aims to provide a preparation method of the colorless aluminum niobate glass, which comprises the following steps:
(1) placing oxide raw materials or mineral raw materials or composite salt raw materials corresponding to the components of the colorless aluminum niobate glass in a mortar or a ball milling tank, and uniformly mixing to obtain a uniform mixture;
(2) pressing the mixture obtained in the step (1) into a sheet material, and then calcining at 1000-1500 ℃ for 1-12 h to obtain a block material;
(3) melting the block material obtained in the step (2) at high temperature, and then cooling and annealing to obtain colorless aluminum niobate glass; wherein the high-temperature melting temperature range is 2000-10000 ℃, and the melting time range is 20 s-20 min.
Preferably, the high-temperature melting in the above preparation method may be performed by a plasma melting method, an arc melting method, or a laser melting method.
On the basis, the invention also provides a more specific preparation method of the colorless aluminum niobate glass, which comprises the following steps:
(1) placing oxide raw materials corresponding to the components of the colorless aluminum niobate glass in a mortar or a ball milling tank to be uniformly mixed to obtain a uniform mixture; the oxide raw material can also be a mineral raw material and a composite salt containing the oxide;
(2) pressing the mixture obtained in the step (1) into a sheet material, calcining at 1000-1500 ℃ for 1-12 h, and then cutting into block materials with the mass of 10-1000 mg/block;
(3) placing the block material obtained in the step (2) in a nozzle of a pneumatic suspension furnace, introducing suspension gas to enable the block to be stably suspended in the air, heating the block to a molten state by using laser, and cooling to obtain glass beads;
(4) and (4) annealing the glass spheres obtained in the step (3) to obtain spherical colorless aluminum niobate glass.
Preferably, the pressure in step (2) is 5 to 15MPa, such as 5MPa, 7MPa, 9MPa, 11MPa, 13MPa, 15MPa, etc.
Preferably, the calcination temperature in step (2) is 1100-1400 ℃, such as 1100 ℃, 1150 ℃, 1200 ℃, 1250 ℃, 1300 ℃, 1350 ℃, 1400 ℃, etc.
Preferably, the calcination time in step (2) is 6-12 h, such as 6h, 7h, 8h, 9h, 10h, 11h, 12h, and the like.
Preferably, in the step (3), the suspension gas is any one of high-purity oxygen, helium, argon or nitrogen; the laser is selected to be one beam to three beams, and more preferably, the laser is selected to be three beams; the laser is selected to be CO2A laser or semiconductor laser; the heating temperature is 2300 deg.C-2700 deg.C, such as 2300 deg.C, 2350 deg.C, 2400 deg.C, 2450 deg.C, 2500 deg.C, 2550 deg.C, 2600 deg.C, 2650 deg.C, 2700 deg.C, etc.; the cooling selection uses water cooling or air cooling, and more preferably, the cooling uses water cooling; the cooling rate is 100-400 ℃/s, such as 100 ℃/s, 150 ℃/s, 200 ℃/s, 250 ℃/s, 300 ℃/s, 350 ℃/s, 400 ℃/s, and the like.
Preferably, the annealing temperature in the step (4) is 600-900 ℃, more preferably 700-800 ℃, such as 650 ℃, 670 ℃, 690 ℃, 710 ℃, 730 ℃, 750 ℃ and the like; the annealing time is 1-24 h, more preferably 18-24 h, such as 18h, 19h, 20h, 21h, 22h, 23h, 24h, etc.
Preferably, the spherical colorless aluminum niobate glass has a diameter of 2mm or more, such as 2mm, 4mm, 6mm, 7mm, 9mm, 11mm, 12mm, and the like.
The aluminum niobate glass contains a large amount of Al2O3And La2O3The melt has high viscosity under high temperature, and is influenced by high pressure airflow, so that a large amount of bubbles which are difficult to remove are easily generated in the melt. In the invention, BaO is an important additive, belongs to alkaline earth metal oxide and belongs to a network outer body in the glass. After BaO is added, the optical constant, the melting property and the devitrification resistance of the glass can be adjusted, bubbles in the glass can be effectively discharged, and the BaO is an important component for obtaining homogeneous glass and is also an essential component for obtaining high refraction.
The aluminum niobate glass does not contain SiO in common glass2、P2O5Or B2O3And thus difficult to obtain by conventional methods. The invention adopts the pneumatic suspension technology, the melt is blown by gas and suspended in the air, and does not need to contact with the wall of the container, thereby avoiding heterogeneous nucleation caused by the contact of the wall of the container, and the melt can reach a deep supercooling state and realize rapid solidification, so that some melts without network forming bodies are not easy to crystallize in the solidification process without the container, and the melts can still keep high-viscosity liquid state at extremely low temperature below the melting point and then are frozen into glass. Compared with a quenching method, the pneumatic suspension technology method is easier to obtain the bulk amorphous material, and the solidification parameters are easier to control.
The aluminum niobate glass of the invention contains Al2O3And Nb2O5The network skeleton of the glass has greater stability Delta T and greater glass forming ability than other materials obtained by a container-free solidification method. In the high-temperature melting technology, the aluminum niobate glass is easier to prepare on the premise of not sacrificing the optical performance, the critical dimension is increased, and the application prospect is larger.
The aluminum niobate glass is composed of high-melting point oxides, the glass transition temperature obtained by thermal analysis is as high as 800-900 ℃, and the aluminum niobate glass has wide application prospect in a high-temperature resistant optical window and can also be applied to a vision correction spectacle lens, an imaging optical system, an infrared imaging and detection system and the like.
Compared with the prior art, the invention has the following beneficial effects:
(1) in the invention, alumina and niobium oxide in the colorless aluminum niobate glass form a glass skeleton; the barium oxide can effectively eliminate bubbles, adjust the optical constant, the melting property and the devitrification resistance of the glass, has very high refractive index, effectively enlarges the stability delta T of the aluminum niobium acid glass in the composition range, and has larger glass forming capability;
(2) in the present invention, Al2O3And Nb2O5The glass is used as a network framework of the glass together, the forming capability of the glass is improved, the stability delta T of the glass is larger, the problem that the glass is difficult to prepare under the condition of no container is solved, and SiO is not contained2、B2O3、P2O5The material for reducing the refractive index of the glass has a refractive index of more than 1.8;
(3) the BaO in the invention can adjust the optical constant, melting property and devitrification resistance of the glass, can effectively discharge bubbles in the glass, is an important component for obtaining homogeneous glass, can obtain high refractive index, and solves the problem that the bubbles in the glass are difficult to discharge;
(4) the colorless aluminum niobate glass can be prepared by adopting high-temperature melting technologies such as a laser melting method, a plasma melting technology, an electric arc furnace melting technology and the like, so that the problem that the aluminum niobate glass cannot be prepared under the conventional conditions is solved, and the problems that a high-melting-point oxide is difficult to melt and the glass prepared by the conventional method is easy to crystallize are solved.
Drawings
FIG. 1 is a photograph of a spherical colorless aluminum niobate glass prepared in example 1 of the present invention;
FIG. 2 is a DTA plot of an aluminum niobate glass prepared in example 12;
FIG. 3 is a graph of the refractive index of the aluminum niobate glass prepared in example 20.
Detailed Description
For a better understanding of the present invention, the following examples are included to further illustrate the present invention, but the present invention is not limited to the following examples.
In the following examples, the numerals in the first row of tables 1 to 10 each indicate the number of the example.
Examples 1 to 9
The colorless aluminum niobate glass and the preparation method thereof specifically comprise the following steps:
(1) preparing raw materials according to the molar ratio of table 1, and uniformly mixing the raw materials in a mortar;
(2) pressing the uniformly mixed powder into a sheet material under the pressure of 10 MPa;
(3) calcining the sheet material at 1100 ℃ for 6h, and cutting the sheet material into blocky raw materials with the mass of about 60 mg/block;
(4) placing the block in a nozzle of a pneumatic suspension furnace, and introducing high-purity O2Stably suspending the block in the air, using three bundles of CO2Heating the block body to 2400 ℃ by laser, heating the block body to a molten state, and then cooling at a cooling speed of 250 ℃/min to obtain glass beads with the diameter of 3 mm;
(5) and (3) putting the glass spheres into a muffle furnace for annealing treatment at 800 ℃ for 2h to obtain the spherical colorless aluminum niobate glass.
Examples 10 to 18
The colorless aluminum niobate glass and the preparation method thereof specifically comprise the following steps:
(1) preparing raw materials according to the molar ratio of the raw materials in the table 2, and uniformly mixing the raw materials in a mortar;
(2) pressing the uniformly mixed powder into a sheet material under the pressure of 12 MPa;
(3) calcining the sheet material at 1100 ℃ for 3h, and cutting the sheet material into blocky raw materials with the mass of about 60 mg/block;
(4) placing the block in a nozzle of a pneumatic suspension furnace, and introducing high-purity O2Stably suspending the block in the air, using three bundles of CO2Heating the block body to 2400 ℃ by laser, heating the block body to a molten state, and then cooling at a cooling speed of 250 ℃/min to obtain glass beads with the diameter of 3 mm;
(5) and putting the glass beads into a muffle furnace for annealing treatment at 800 ℃ for 2 h.
TABLE 1
TABLE 2
Examples 19 to 27
The colorless aluminum niobate glass and the preparation method thereof specifically comprise the following steps:
(1) preparing raw materials according to the molar ratio of the raw materials in the table 3, and uniformly mixing the raw materials in a mortar;
(2) pressing the uniformly mixed powder into a sheet material under the pressure of 12 MPa;
(3) calcining the sheet material at 1100 ℃ for 3h, and dividing the sheet material into blocky raw materials with the mass of about 90 mg/block;
(4) placing the block in a nozzle of a pneumatic suspension furnace, and introducing high-purity O2Stably suspending the block in the air, using three bundles of CO2Heating the block body to 2500 ℃ by laser to enable the block body to be heated to a molten state, and then cooling at a cooling speed of 250 ℃/min to obtain a glass bead with the diameter of 3.5 mm;
(5) and putting the glass beads into a muffle furnace for annealing treatment at 810 ℃ for 3 h.
TABLE 3
Examples 28 to 36
The colorless aluminum niobate glass and the preparation method thereof specifically comprise the following steps:
(1) preparing raw materials according to the molar ratio in the table 4, and uniformly mixing the raw materials in a mortar;
(2) pressing the uniformly mixed powder into a sheet material under the pressure of 14 MPa;
(3) calcining the sheet material at 1200 ℃ for 4h, and cutting the sheet material into blocky raw materials with the mass of about 70 mg/block;
(4) placing the block in a nozzle of a pneumatic suspension furnace, and introducing high-purity O2Stably suspending the block in the air, using three bundles of CO2Heating the block to 2600 ℃ by laser, heating the block to a molten state, and then cooling at a cooling speed of 350 ℃/min to obtain glass beads with the diameter of 3.2 mm;
(5) and putting the glass beads into a muffle furnace for annealing treatment at 800 ℃ for 6 h.
TABLE 4
Examples 37 to 45
The colorless aluminum niobate glass and the preparation method thereof specifically comprise the following steps:
(1) preparing raw materials according to the molar ratio of the raw materials in the table 5, and uniformly mixing the raw materials in a mortar;
(2) pressing the uniformly mixed powder into a sheet material under the pressure of 10 MPa;
(3) calcining the sheet material at 1200 ℃ for 2h, and cutting the sheet material into blocky raw materials with the mass of about 80 mg/block;
(4) placing the block in a nozzle of a pneumatic suspension furnace, and introducing high-purity O2Stably suspending the block in the air, using three bundles of CO2Heating the block body to 2400 ℃ by laser, heating the block body to a molten state, and then cooling at a cooling speed of 300 ℃/min to obtain glass beads with the diameter of 3.3 mm;
(5) and putting the glass beads into a muffle furnace for annealing treatment at 810 ℃ for 4 h.
TABLE 5
The colorless aluminum niobate glasses prepared in examples 1 to 45 above have the refractive index, Abbe number and thermal stability DeltaT as the results of the performance test, as shown in tables 6 to 10.
TABLE 6
TABLE 7
TABLE 8
TABLE 9
Watch 10
As can be seen from tables 6 to 10: the aluminum niobate glass has a refractive index of 1.8-2.3, an Abbe number of 25-45 and stability delta T of 60-260 ℃.
The applicant states that the present invention is illustrated by the above examples to show the detailed process equipment and process flow of the present invention, but the present invention is not limited to the above detailed process equipment and process flow, i.e. it does not mean that the present invention must rely on the above detailed process equipment and process flow to be implemented. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (8)
1. The colorless aluminum niobate glass is characterized by comprising the following components in percentage by mol:
Nb2O5 5mol%~15mol%
Al2O3 30mol%~55mol%
La2O3 20mol%~28mol%
10-15 mol% of BaO, but not 10 mol%;
0-5 mol% of other oxides;
the total mole sum of all the components is 100 percent;
the other oxide is selected from any one or the combination of at least two of zinc oxide, calcium oxide, zirconium oxide, titanium oxide, tantalum oxide, tungsten oxide, gallium oxide, yttrium oxide or gadolinium oxide;
the refractive index of the aluminum niobate glass is 1.8-2.3, the Abbe number is 25-45, and the glass transition temperature is 800-900 ℃.
2. A method of making the colorless aluminum niobate glass of claim 1, comprising the steps of:
(1) uniformly mixing oxide raw materials or mineral raw materials or composite salt raw materials with corresponding components according to claim 1 to obtain a uniform mixture;
(2) calcining the mixture obtained in the step (1) at 1000-1500 ℃ for 1-12 h to obtain a block material;
(3) melting the block material obtained in the step (2) at high temperature, and then cooling and annealing to obtain colorless aluminum niobate glass; wherein the high-temperature melting temperature range is 2000-10000 ℃, and the melting time range is 20 s-20 min.
3. The method of claim 2, wherein the high temperature melting is performed by a plasma melting process, an arc melting process, or a laser melting process.
4. The method for preparing a colorless aluminum niobate glass according to claim 2, wherein the step (3) comprises the following steps: placing the block material obtained in the step (2) in a nozzle of a pneumatic suspension furnace, introducing suspension gas to enable the block to be stably suspended in the air, heating the block to a molten state by using laser, and cooling to obtain glass beads; and then annealing the glass beads to obtain the spherical colorless aluminum niobate glass.
5. The method of claim 4, wherein the selected suspension gas is any one of high purity oxygen, helium, argon or nitrogen; the laser is selected to be CO2A laser or semiconductor laser; the heating temperature is 2300-2700 ℃; the cooling rate required by cooling is 100-400 ℃/s.
6. The method of claim 2, wherein the calcining temperature in step (2) is 1100-1400 ℃ and the calcining time is 6-12 hours.
7. The method of claim 2, wherein the annealing temperature in step (3) is 600-900 ℃ and the annealing time is 1-24 hours.
8. Use of the colorless aluminum niobate glass of claim 1, as a reflective tape, a vision correcting spectacle lens, a glass for an imaging system, or an optical window for a detection system.
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| JP2009120485A (en) * | 2009-03-10 | 2009-06-04 | Hikari Glass Co Ltd | Optical glass |
| JP2016011228A (en) * | 2014-06-30 | 2016-01-21 | 日本電気硝子株式会社 | Optical glass |
| JP2016079056A (en) * | 2014-10-15 | 2016-05-16 | 日本電気硝子株式会社 | Optical glass and producing method thereof |
| JP2016079055A (en) * | 2014-10-15 | 2016-05-16 | 日本電気硝子株式会社 | Optical glass and producing method thereof |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009120485A (en) * | 2009-03-10 | 2009-06-04 | Hikari Glass Co Ltd | Optical glass |
| JP2016011228A (en) * | 2014-06-30 | 2016-01-21 | 日本電気硝子株式会社 | Optical glass |
| JP2016079056A (en) * | 2014-10-15 | 2016-05-16 | 日本電気硝子株式会社 | Optical glass and producing method thereof |
| JP2016079055A (en) * | 2014-10-15 | 2016-05-16 | 日本電気硝子株式会社 | Optical glass and producing method thereof |
| 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 |
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