CN107032602B

CN107032602B - Environment friendly heavy-lanthanide flint optical glass

Info

Publication number: CN107032602B
Application number: CN201710341825.3A
Authority: CN
Inventors: 张轲
Original assignee: HUBEI GEBIJIA PHOTOELECTRIC TECHNOLOGY CO LTD
Current assignee: HUBEI GEBIJIA PHOTOELECTRIC TECHNOLOGY CO LTD
Priority date: 2017-05-16
Filing date: 2017-05-16
Publication date: 2019-06-18
Anticipated expiration: 2037-05-16
Also published as: CN107032602A

Abstract

The invention discloses a kind of environment friendly heavy-lanthanide flint optical glass, the parts by weight of chemical component are as follows: SiO₂: 1.00~5.00 parts, B₂O₃: 10.00~27.00 parts, La₂O₃: 17.00~40.00 parts, Nb₂O₅: 2.00~20.00 parts, TiO₂: 0~11.00 part, ZrO₂: 3.00~7.00 parts, Ta₂O₅: 0~6.00 part, Gd₂O₃: 0~22.00 part, WO₃: 0~7.00 part, ZnO:0~25.00 part, Sb₂O₅: 0~0.50 part, R₂O:0~2.00 part, R'O:0~22.50 part, wherein the R₂O is Li₂O、Na₂O、K₂One of O, two kinds perhaps three kinds of R'O be one of CaO, BaO, SrO, two kinds or three kinds.The refractive index of product of the present invention be (nd) be 1.80~1.90, Abbe number (vd) is 25~33, there are good optical property, excellent devitrification resistance, good melt molding performance, and there is the crystalline stability for realizing continuous melting.

Description

Environment friendly heavy-lanthanide flint optical glass

Technical field

The invention belongs to glass preparation fields, and in particular to a kind of environment friendly heavy-lanthanide flint optical glass.

Background technique

With the development of photovoltaic industry, optical element more tends to miniaturization, lightweight and high performance, and refractive index is 1.81 Above glass of high refractive index is suitable as the optical glass material of such optical element.

Optical glass needs to have high refractive index, low Abbe number, thus carry out the design of special optical system in, it can be achieved that Make up the purpose with correcting chromatic aberration；In addition, it is also necessary to intensity with higher and wear-resisting property can just prolong its service life, Guarantee product quality.And most of product in the prior art is often only focused on pursuing high refractive index and ignoring optical glass need Other to be had attribute.

The optical glass with a high refractive index that tradition uses generally comprises PbO to obtain ideal optical property, but With the improvement of people's environmental awareness, more and more countries propose unleaded environmental protection requirement without arsenic to optical material.? TiO is introduced in the glass of silicate-base or boric acid alkali₂、Nb₂O₅、La₂O₃、Y₂O₃、Gd₂O₃Equal polyvalent metal oxides can obtain To unleaded high-refractive index environment friendly optical glass without arsenic.

Summary of the invention

In view of this, it is necessary to provide a kind of refractive index 1.80~1.91, Abbe number is optical property between 25~33 Stabilization, devitrification resistance is excellent, melt molding performance is good, and chemical stability is excellent, and transmitance is good, the knot with continuous melting Brilliant stability, and do not contain PbO and As₂O₃Environment friendly heavy-lanthanide flint optical glass.

A kind of environment friendly heavy-lanthanide flint optical glass provided by the invention, the parts by weight of chemical component are as follows: SiO₂: 1.00 ~5.00 parts, B₂O₃: 10.00~27.00 parts, La₂O₃: 17.00~40.00 parts, Nb₂O₅: 2.00~20.00 parts, TiO₂: 0~ 11.00 part, ZrO₂: 3.00~7.00 parts, Ta₂O₅: 0~6.00 part, Gd₂O₃: 0~22.00 part, WO₃: 0~7.00 part, ZnO:0 ~25.00 parts, Sb₂O₅: 0~0.50 part, R₂O:0~2.00 part, R'O:0~22.50 part, wherein the R₂O is Li₂O、Na₂O、 K₂One of O, two kinds perhaps three kinds of R'O be one of CaO, BaO, SrO, two kinds or three kinds.

The invention has the following advantages that

Environment friendly heavy-lanthanide flint optical glass of the invention is free of PbO, the As very big to environmental hazard₂O₃Equal ingredients, and this production The refractive index of product be (nd) be 1.80~1.90, Abbe number (vd) is 25~33, carry out the design of special optical system in, can It makes up and correcting chromatic aberration well, there is good optical property, excellent devitrification resistance, good melt molding performance, change Excellent in stability is learned, transmitance is good, and has the crystalline stability for realizing continuous melting.

Specific embodiment

The present invention will be described in detail combined with specific embodiments below, and the description of this part is only exemplary and explains Property, there should not be any restriction effect to protection scope of the present invention.

Present embodiment provides a kind of environment friendly heavy-lanthanide flint optical glass, the parts by weight of chemical component are as follows: SiO₂: 1.00~5.00 parts, B₂O₃: 10.00~27.00 parts, La₂O₃: 17.00~40.00 parts, Nb₂O₅: 2.00~20.00 parts, TiO₂: 0~11.00 part, ZrO₂: 3.00~7.00 parts, Ta₂O₅: 0~6.00 part, Gd₂O₃: 0~22.00 part, WO₃: 0~7.00 part, ZnO:0~25.00 part, Sb₂O₅: 0~0.50 part, R₂O:0~2.00 part, R'O:0~22.50 part, wherein the R₂O is Li₂O、 Na₂O、K₂One of O, two kinds perhaps three kinds of R'O be one of CaO, BaO, SrO, two kinds or three kinds.

Preferably, the environment friendly heavy-lanthanide flint optical glass, the parts by weight of chemical component are as follows: SiO₂: 2.50~5.00 parts, B₂O₃: 13.00~23.50 parts, La₂O₃: 17.00~35.00 parts, Nb₂O₅: 6.95~17.30 parts, TiO₂: 2.50~10.00 parts, ZrO₂: 3.00~6.50 parts, Ta₂O₅: 0~4.70 part, Gd₂O₃: 0~20.60 part, WO₃: 0~6.30 part, ZnO:0~23.50 part, Sb₂O₅: 0~0.30 part, R₂O:0~1.80 part, R'O:0~18.00 part, wherein the R₂O is Li₂O、 Na₂O、K₂One of O, two kinds perhaps three kinds of R'O be one of CaO, BaO, SrO, two kinds or three kinds.

SiO in the present invention₂Glass former, at the same high boron, lanthanum glass in can also adjust glass viscosity and Inhibit glass devitrification tendency, but when its content is lower than 1 part cannot achieve said effect, and when more than 5 parts glass meltdown property It reduces, while the refractive index decline of glass, devitrification resistance is deteriorated, therefore SiO₂The content of component is limited to 1 part~5 parts.

B in the present invention₂O₃It is also glass former, meltdown property can be improved for high lanthanum glass, if its content is insufficient The meltdown property of glass is poor at 10 parts, and the tendency towards devitrification of glass is big, and refractive index is unable to reach requirement and glass when more than 27 parts Chemical stability be deteriorated, for the optical glass that must reach requirement, B₂O₃The content of component is limited to 10~27 parts.

La in the present invention₂O₃The refractive index of glass can be improved and reduce dispersion, improve the chemical stability and devitrification of glass Property, it is the main component of high-refractivity lanthanide glass, when its content is less than 17 parts, glass refraction is relatively low, is unable to reach and wants It asks, when its content is more than 40 parts, the tendency towards devitrification of glass increases, therefore La₂O₃The content of component is limited to 17~40 parts.

Nb in the present invention₂O₅It is the neccessary composition of high refractive index, high-dispersive optical glass, can effectively improves the change of glass It learns stability and improves the devitrification resistance property of glass, improve the crystallization property of glass, when content is lower than 2 parts, to raising glass Glass refractive index and the effect of dispersion are unobvious, and tendency towards devitrification increases, when its content is more than 20 parts, glass devitrification resistance property drop It is low, therefore Nb₂O₅The content of component is limited to 2~20 parts.

TiO in the present invention₂It is very effective for the refractive index and dispersion that improve glass, and can significantly reduce the density of glass, But due to TiO₂It is the oxide to form nucleus, if its content is more than 11 parts, will increase tendency towards devitrification, and causes glass Color, therefore TiO₂Content be limited to 0~11 part.

ZrO in the present invention₂And Ta₂O₅It is to improve the effective component of glass refraction, and have the work for improving devitrification resistance property With if ZrO₂Content lower than 3 parts then said effect it is unobvious, if ZrO₂Content be more than 7 parts, Ta₂O₅Content be more than 6 parts, the tendency towards devitrification that will lead to glass instead increases, therefore, ZrO₂Content be limited to 3~7 parts, Ta₂O₅Content be limited to 0~6 part.

Gd in the present invention₂O₃It is also the effective component for increasing the refractive index of glass, improvement glass is played on physical and chemical performance The effect of glass chemical stability and devitrification resistance property uses a certain amount of Gd₂O₃Instead of La₂O₃, can suitably be effectively improved glass Devitrification behavior, so Gd₂O₃Content be limited to 0~22 part.

WO in the present invention₃Adjustable Glass optical constant and devitrification resistance, can change especially in lanthanide optical glass The forming properties of kind glass, and transmitance will not be damaged, experiment discovery WO₃When content is more than 7 parts, the tendency towards devitrification of glass is instead Increase, therefore, WO₃Content be limited to 0~7 part.

ZnO can reduce the tendency towards devitrification of glass in the present invention, but devitrification resistance and chemical stability drop when more than 25 parts Low, therefore, the content of ZnO is limited to 0~25 part.

Alkali metal oxide Li in the present invention₂O、Na₂O and K₂O plays the role of improving glass melting performance, but its content is not It can introduce excessively, because these reduce glass viscosity at branch, the chemical stability of glass and devitrification resistance property be made to be deteriorated.Therefore Li₂O、Na₂O and K₂O total content is limited to 0~2 part, is preferentially added without.

The refractive index of the adjustable glass of alkaline-earth metal CaO, BaO, SrO and Abbe number, the change for improving glass in the present invention Stability, thermal stability are learned, and the crystallization that can reduce glass is dangerous, but when CaO, BaO, SrO total content are excessive, glass Tendency towards devitrification becomes larger.

Sb in the present invention₂O₃As clarifying agent.Promote clarification when glass melting, 0.5 part of Sb below can be added₂O₃Make For clarifying agent.

The specific raw material for 14 embodiments that 1 present invention of table enumerates sees and each parameter (gained of optical glass obtained Institute's measured data after data are annealed for -4 DEG C/h).

Table 1

The refractive index nd of environment friendly heavy-lanthanide flint optical glass of the invention is 1.80-1.92, Abbe number vd is 29-47, is had Well optical property, excellent devitrification resistance, good melt molding performance, chemical stability is excellent, and transmitance is good, And there is the crystalline stability for realizing continuous melting.

The above described specific embodiments of the present invention are not intended to limit the scope of the present invention..Any basis Any other various changes and modifications that technical concept of the invention is made should be included in the guarantor of the claims in the present invention It protects in range.

Claims

1. a kind of environment friendly heavy-lanthanide flint optical glass, it is characterised in that: the environment friendly heavy-lanthanide flint optical glass chemical component Parts by weight are as follows: SiO₂: 3.10 parts, B₂O₃: 11.60 parts, La₂O₃: 25.60 parts, Nb₂O₅: 3.80 parts, ZrO₂: 4.10 parts, Ta₂O₅: 2.50 parts, Gd₂O₃: 20.60 parts, WO₃: 6.30 parts, the environment friendly heavy-lanthanide flint optical glass refractive index is 1.91058.

2. a kind of environment friendly heavy-lanthanide flint optical glass, it is characterised in that: the environment friendly heavy-lanthanide flint optical glass chemical component Parts by weight are as follows: SiO₂: 3.10 parts, B₂O₃: 11.60 parts, La₂O₃: 26.23 parts, Nb₂O₅: 3.68 parts, ZrO₂: 3.8 parts, Ta₂O₅: 2.50 parts, Gd₂O₃: 20.60 parts, WO₃: 7 parts, the environment friendly heavy-lanthanide flint optical glass refractive index is 1.91003.