CN101117267A - High-refractivity spectacle glass - Google Patents

High-refractivity spectacle glass Download PDF

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Publication number
CN101117267A
CN101117267A CNA2006100199063A CN200610019906A CN101117267A CN 101117267 A CN101117267 A CN 101117267A CN A2006100199063 A CNA2006100199063 A CN A2006100199063A CN 200610019906 A CN200610019906 A CN 200610019906A CN 101117267 A CN101117267 A CN 101117267A
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China
Prior art keywords
glass
weight
cao
mgo
sio
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Pending
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CNA2006100199063A
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Chinese (zh)
Inventor
赵宝库
詹祖盛
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HUBEI HUAGUANG NEW MATERIAL CO Ltd
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HUBEI HUAGUANG NEW MATERIAL CO Ltd
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Priority to CNA2006100199063A priority Critical patent/CN101117267A/en
Publication of CN101117267A publication Critical patent/CN101117267A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a glass with a refractive index of 1.80, an Abbe coefficient of more than 34.5 and a a density of less than 3.75. The weight percentage of the compositions of the invention on the basis of oxides is as follows: SiO2 20-36; B2O3 1-10; sigma SiO2+B2O3 23-40; Li2O 1-6; CaO 10-20; MgO 0-5; sigma CaO+ MgO 12-23; TiO2 5-15; La2O3 18-27; Nb2O5 10-20; ZrO2 1-8; Y2O3 0-5; Co2O3 0-9 ppm of appropriate weight percentage added in the glass compositions; Er2O3 0-0.5 percent (weight) NiO 0-80 ppm. No oxide with harmful contents such as lead, arsenic and barium is added in the glass compositions.

Description

High-refractivity spectacle glass
Technical field
That the present invention relates generally to is unleaded, arsenic, barium, and high refractive index, higher abbe number and low-density environmental protection glass, and this glass is as the processing of glasses lens.It comprises colourless and colour of skin glass for lenses.
Background technology
Optical glass having high refractive index is known, as patent publication No. be: CN1252391A, specific refractory power circle are between 1.64-1.83, CN1234376A, CN1101345C, to have provided specific refractory power be the achievement in research of 1.83-1.88, patent publication No. is that CN1101345C has provided specific refractory power greater than 1.88 achievement in research, but, appoint in this invention so to have a spot of arsenic.In foregoing invention, and component, formation scope and the technical feature of glass have been described respectively.Because after in the opticglass product, adding lead, arsenic, barium chemical ingredients, environment is polluted, for this reason, people are plumbous and white arsenic, barytic glass and have separately the opticglass of performance and study to the glass ingredient oxygen-freeization, the glass composition is carried out new exploitation and change widely, overcome the number of drawbacks that these glass exist.
Summary of the invention
In order to overcome plumbous oxide, white arsenic and barium oxide disadvantageous effect in the opticglass product, the present invention seeks in glass ingredient, not add the oxide compound of hostile environments such as leaded, arsenic, barium, the specific refractory power (n of these glass d=1.80), Abbe number height (υ d〉=34.5), density low (ρ≤3.75), can be processed into the lens that thickness is thinner, weight is lighter.Especially in high myopia or long sight colony, use the eyeglass of this glass processing more attractive in appearance, vision correction precision height.And from the consumer group to the social demand, eyewear art needs environmental protection high refractive index (n d=1.80) spectacle glass.
Technical solution of the present invention realizes that by the glass ingredient scope its glass ingredient scope is (by oxide weight %):
SiO 2 20-36；B 2O 3 1-10；∑SiO 2+B 2O 3 23-40；Li 2O 1-6；CaO 10-20；MgO 0-5；∑CaO+MgO 12-23；TiO 2 5-15；La 2O 3 18-27；Nb 2O 510-20；ZrO 2 1-8；Y 2O 3 0-5
And in the glass compound, add appropriate colouring agent Co 2O 30-9ppm; Er 2O 30-0.5NiO 0-80ppm.
Do not comprise the oxide compound of hostile environments such as lead, arsenic, barium in this glass ingredient, except inevitable raw material impurity, do not add Ta 2O 5, WO 3Etc. the more expensive oxide compound of price.Do not introduce Na yet 2O, K 2O.These two kinds of oxide compounds are very important in other glass, still, are harmful factors in this glass system, and it can seriously reduce the specific refractory power of glass, secondly, has reduced the processing performance of glass.
SiO 2Content be preferably 23-34% (weight), further be optimized for 25-32% (weight).If consumption is less than 25% (weight), to the crystallization property and the processing performance generation adverse influence of glass.If consumption surpasses 32% (weight), will produce adverse influence to the optical characteristics of glass.B 2O 3Content be optimized for 2-9% (weight), if content greater than 9% (weight), the viscosity of glass reduces, content is less than 2% (weight), the easy crystallization of glass, it is unfavorable that the production moulding of glass is produced.Component S iO 2+ B 2O 3Total amount should be 26-37% (weight), the glass ingredient in this scope has melting properties and optical property preferably.When these glass ingredients further were optimized for 29-35%, glass had good melting properties, optical property and chemical stability.
In the borosilicate glass system, add an amount of alkalimetal oxide and help the fusing of glass.Consider the particular requirement of glass optical property, first-selected Li 2O introduces in the glass ingredient as alkalimetal oxide, and consumption is 1-6% (weight), is optimized for 2-6% (weight), further is optimized for 3-5% (weight) and can obtains very favorable effect.
In this glass, add a certain amount of alkaline earth metal oxide, help the adjustment of optical property and the fusing of glass.Consider the density requirements of glass and the needs of environment protection, select alkaline-earth metal CaO, MgO to introduce glass ingredient as additive, its consumption CaO is 10-20% (weight), through being optimized for 10-18% (weight), and 12-16% (weight) more preferably; MgO is 0-5% (weight), further is optimized for 0-3% (weight); ∑ CaO+MgO content is 12-23% (weight), further is optimized for 14-18% (weight).
La 2O 3, Nb 2O 5, ZrO 2, TiO 2, Y 2O 3Introducing mainly work to improve specific refractory power, reduce abbe number and improve crystallization property.La 2O 3, Nb 2O 5, Y 2O 3When improving specific refractory power and reducing abbe number, improved the technology stability of glass, ZrO 2, TiO 2Chemical stability that can reinforcing glass.La in the glass 2O 3Content be 18-27% (weight), be optimized for 21-25% (weight); Nb 2O 5Content in glass is 10-20% (weight), is optimized for 13-17% (weight); ZrO 2Content in glass is 1-8% (weight), is optimized for 3-6% (weight); TiO 2Content in glass is 5-15% (weight), is optimized for 7-10% (weight); Y 2O 3Content in glass is 0-5% (weight), is optimized for 0.5-4% (weight), further is optimized for 1-3% (weight).
Process is continued to optimize glass ingredient, forms following glass and forms (by oxide weight per-cent):
SiO 2 25-32；B 2O 3 2-9；∑SiO 2+B 2O 3 26-37；Li 2O 3-5；CaO 12-16；MgO 0-3；∑CaO+MgO 14-18；TiO 2 7-10；La 2O 3 21-25；Nb 2O 5 13-17；ZrO 2 3-6；Y 2O 3 1-3。
In addition, being also advantageous in that of this glass added Co in glass ingredient 2O 30-6ppm; Er 2O 30.1-0.3% (weight); NiO 0-60ppm plasma tinting material, glass can adjust distinct colors between the colour of skin colourless.
It is 1.79-1.81 that environmental protection spectacle glass of the present invention has high refractive index nd, low abbe number υ d〉=34.5, low glass density ρ≤3.75g/cm/ 3
Environmental protection spectacle glass of the present invention used salt raw material in each link of producing is carbonate raw material (Li 2CO 3, CaCO 3, MgCO 3), the gas that is discharged in the glass melting process does not pollute environment.The present invention has satisfied the needs of spectacles industry, and good optical performance and chemical property are arranged.
Embodiment
With different glass ingredients in proportion weighing 200g mix, raw material is added in the platinum crucible, under 1350 ℃ of conditions, kept 2-4 hour, melt, pour into then in the forming mould, form one 70 * 60 * 10 glass.Put into box-annealing furnace,, be cooled to room temperature with 60 ℃ of speed per hour 620 ℃ of insulations 2 hours.Annealed glass is cut into different samples, measuring optical performance, thermal property and physicals.The composition of test result, glass and part characteristic thereof are listed in table one, the table two.
In process of production, glass crystallization property under hot conditions is estimated.Temperature of smelting furnace is set at 1050 ℃, 1000 ℃, 970 ℃, 950 ℃ respectively, and soaking time is 60 minutes.Through test, do not find the crystalline state material that eyes can be differentiated.
Listed refractive index n d and the corresponding υ d that comprises the 587.6nm place in the table, the density p (g/cm in the time of 20 ℃ 3), thermalexpansioncoefficient 400(* 10 -7/ ℃), transition temperature Tg (℃), softening temperature Tf (℃) and white light average transmittances τ (%).
Table one
Example 01 02 03 04 05 06
SiO 2 29.5 29.0 29.3 29.0 29.0 31.0
B 2O 3 3.0 3.5 3.5 3.5 3.5 2.5
Li 2O 4.0 4.0 4.0 3.8 3.8 4.2
CaO 15.0 15.0 15.0 15.5 15.5 16.0
MgO 1.0 1.0 1.0 1.0 1.0 1.0
TiO 2 8.3 8.3 8.5 8.5 8.5 7.5
La 2O 3 21.5 21.5 21.5 24.2 24.2 24.8
Nb 2O 5 16.3 16.8 16.2 13.5 13.5 13.1
ZrO 2 5.7 5.7 5.5 5.5 5.5 6.5
Y 2O 3 1.5 1.8 1.8 2.0 2.0 2.0
Co 2O 3 1.6 1.5 1.3 1.2
Er 2O 3 0.25 0.25
NiO 45.0 45.0
nd 1.8004 1.7993 1.8020 1.8024 1.8016 1.7990
υd 34.7 34.7 34.8 34.8 35.0 35.0
ρ 3.60 3.60 3.62 3.68 3.68 3.70
τ(≥) 84.0 84.0 84.0 84.0 80.0 80.0
α 400 90.21 90.32 90.27 90.16 89.6 89.6
Tg 608 610 607 613 613 604
Tf 682 686 682 680 680 679
Annotate: Co in the table 2O 3, the NiO measure unit is ppm.
Table two
Example 07 08 09 10 11 12
SiO 2 31.0 27.5 27.0 29.5 29.3 29.3
B 2O 3 2.5 5.5 5.5 3.0 3.2 3.2
Li 2O 4.2 3.0 3.0 3.8 3.8 3.8
CaO 16.0 16.5 16.5 14.8 14.8 14.8
MgO 1.0 1.0 1.0 1.0 1.0 1.0
TiO 2 7.5 7.2 7.2 9.2 9.4 9.0
La 2O 3 24.8 22.6 22.6 23.0 23.0 23.3
Nb 2O 5 13.1 14.1 14.2 14.2 14.5 14.0
ZrO 2 6.5 6.8 6.8 4.8 4.8 5.0
Y 2O 3 2.3 2.3 2.2 2.2 2.0 2.0
Co 2O 3
Er 2O 3 0.27 0.27 0.2 0.2 0.15 0.15
NiO 50.0 50.0 35.0 35.0 30.0 30.0
nd 1.7965 1.7982 1.7993 1.8016 1.8007 1.8011
υd 35.0 34.9 34.9 34.8 35.0 35.0
ρ 3.68 3.68 3.65 3.64 3.64 3.65
τ(≥) 80.0 80.0 81.0 81.0 82.0 82.0
α 400 90.2 90.86 90.87 90.24 90.62 90.73
Tg 614 606 604 611 612 610
Tf 680 679 678 681 680 680
Annotate: Co in the table 2O 3, the NiO measure unit is ppm.

Claims (3)

1. high refractive index spectacle glass, this glass refraction n dBe 1.79-1.81, Abbe number is greater than 34.5, and density is less than 3.75 glass, and its chemical constitution is that the weight % of benchmark is expressed as follows with the oxide compound:
SiO 2 20-36
B 2O 3 1-10
∑SiO 2+B 2O 3 23-40
Li 2O 1-6
CaO 10-20
MgO 0-5
∑CaO+MgO 12-23
TiO 2 5-15
La 2O 3 18-27
Nb 2O 5 10-20
ZrO 2 1-8
Y 2O 3 0-5
Wherein contain Co 2O 30-9ppm; Er 2O 30-0.5% (weight); NiO 0-80ppm.
2. a kind of high refractive index spectacle glass according to claim 1 is characterized in that: it is the chemical constitution that the weight % of benchmark represents that described glass has following oxide compound:
SiO 2 25-32
B 2O 3 2-9
∑SiO 2+B 2O 3 26-37
Li 2O 3-5
CaO 12-16
MgO 0-3
∑CaO+MgO 14-18
TiO 2 7-10
La 2O 3 21-25
Nb 2O 5 13-17
ZrO 2 3-6
Y 2O 3 1-3
Wherein contain Co 2O 30-6ppm; Er 2O 30.1-0.3% (weight); NiO 0-60ppm
3. a kind of high refractive index spectacle glass according to claim 1 and 2 is characterized in that: except unavoidable impurities, and the compound that this glass does not contain plumbous oxide, white arsenic, barium oxide and discharges hostile environment.
CNA2006100199063A 2006-08-01 2006-08-01 High-refractivity spectacle glass Pending CN101117267A (en)

Priority Applications (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170283305A1 (en) * 2016-03-31 2017-10-05 Corning Incorporated High index glass and devices incorporating such
CN109917497A (en) * 2019-05-08 2019-06-21 河南达人视界眼镜有限公司 A kind of high definition eyeglass of Abbe number 45
CN110431118A (en) * 2017-01-05 2019-11-08 奇跃公司 Pass through the patterning of the glass of high refractive index of plasma etching
JPWO2018235725A1 (en) * 2017-06-23 2020-04-23 Ａｇｃ株式会社 Optical glass and optical components

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170283305A1 (en) * 2016-03-31 2017-10-05 Corning Incorporated High index glass and devices incorporating such
WO2017172861A1 (en) * 2016-03-31 2017-10-05 Corning Incorporated High index glass and devices incorporating such
CN109071314A (en) * 2016-03-31 2018-12-21 康宁股份有限公司 Glass of high refractive index and the device for combining it
JP2019511449A (en) * 2016-03-31 2019-04-25 コーニング インコーポレイテッド High refractive index glass and device incorporating it
US10815145B2 (en) * 2016-03-31 2020-10-27 Corning Incorporated High index glass and devices incorporating such
CN110431118A (en) * 2017-01-05 2019-11-08 奇跃公司 Pass through the patterning of the glass of high refractive index of plasma etching
US11396473B2 (en) 2017-01-05 2022-07-26 Magic Leap, Inc. Patterning of high refractive index glasses by plasma etching
CN110431118B (en) * 2017-01-05 2023-10-27 奇跃公司 Patterning of high refractive index glass by plasma etching
JPWO2018235725A1 (en) * 2017-06-23 2020-04-23 Ａｇｃ株式会社 Optical glass and optical components
US11554985B2 (en) 2017-06-23 2023-01-17 AGC Inc. Optical glass and optical component
CN109917497A (en) * 2019-05-08 2019-06-21 河南达人视界眼镜有限公司 A kind of high definition eyeglass of Abbe number 45

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Open date: 20080206