CN1935717A - Optical glass for high-refractivity low dispersion precision die mould - Google Patents

Optical glass for high-refractivity low dispersion precision die mould Download PDF

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CN1935717A
CN1935717A CN 200610022054 CN200610022054A CN1935717A CN 1935717 A CN1935717 A CN 1935717A CN 200610022054 CN200610022054 CN 200610022054 CN 200610022054 A CN200610022054 A CN 200610022054A CN 1935717 A CN1935717 A CN 1935717A
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glass
wt
high
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la2o3
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CN 200610022054
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CN1935717B (en )
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匡波
孙伟
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成都光明光电股份有限公司
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    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL 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
    • C03C3/00Glass compositions
    • C03C3/04Glass compositions containing silica
    • C03C3/062Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths

Abstract

The invention provides a high-refractivity, low-dispersivity, fine moulding optical glass, comprising SiO2:1-8wt%, B2O3:16-30wt%, La2O3:15-40wt%, Gd2O3:0-20wt%, ZnO:8-30wt%, Nb2O5:0.5-14.5wt%, WO3:0-12.5wt%, TiO2:0-9wt%, Li2O:0.5-4wt%, ZrO2:1-10 wt%, Y2O3:0-5 wt%, Yb2O3:0-5 wt%, Lu2O3:0-5 wt%, Na2O: 0-3 wt%, K2O:0-2 wt%, Al2O3:0-2 wt%, BaO:0-3 wt%, CaO:0-3 wt%, SrO:0- 3 wt%, MgO:0-3 wt%, Sb2O3:0-0.5 wt%, and SnO2:0-0.5 wt%. And the invention adopts a B2O3-SiO2-La2O3(Gd2O3)-ZnO system, and uses Nb2O5, WO3 and TiO2 in the reasonable proportion to make glass have the required optical constants and good physicochemical properties of fine moulding. And its transformation temperature (Tg) is lower than 560 deg.C. And it has no high-price Ta2O5 but has good chemical stability, able to be produced in batches and stably by single pot or continous smelting furnace, or other equipment, and suitable for low-cost and fine moulding nonspherical lenses and other optical components.

Description

高折射率低色散精密压型用光学玻璃 A high refractive index and low dispersion optical glass for precision press-type

技术领域 FIELD

本发明涉及一种光学玻璃,特别是涉及一种具有折射率(Nd)为1.77-1.84,阿贝数(Vd)为36-44的高折射率低色散光学玻璃。 The present invention relates to an optical glass, particularly relates to a refractive index (Nd) of 1.77-1.84, an Abbe number (Vd) of a high refractive index and low dispersion optical glass is 36-44.

背景技术 Background technique

随着光电产品市场的激烈竞争和发展,高产率、低成本地制造光学元件是每一个光学材料和光学元件制造商的目标。 With fierce competition in the market and the development of optoelectronic products, high yield, low cost manufacturing an optical element that every manufacturer of optical materials and optical components target. 采用精密模压成型技术(包括直接压型法和二次压型法)可以减少原料消耗,大大降低光学元件的机械加工量从而降低人力物力成本,并可以较容易实现批量稳定生产,同时还可以减轻环境污染。 Using precision press molding techniques (including direct compression molding method and molding method secondary pressure) can reduce the consumption of raw materials, greatly reducing the amount of machining of the optical element to reduce manpower costs, and it is easier to achieve stable production batch, but also can reduce the environmental pollution. 另一方面,近年来数码相机、数字摄像机、照相手机等日益流行,用于光学系统的机械设备的集成度及功能迅速增加。 On the other hand, in recent years, digital cameras, digital video cameras, camera phones become increasingly popular, machinery and equipment for the optical system of integration and functionality is increasing rapidly. 在这种情况下,要求光学系统达到更高的准确度,并减轻光学系统的重量和减小尺寸。 In this case, the optical system is required to achieve higher accuracy, and reduce the size and weight of the optical system. 目前解决这一问题的主要方法是采用非球面镜,使用非球面元件已成为光学设计的主流,非球面透镜的制造则广泛使用精密模压的方法。 The main method to solve this problem is to use a non-spherical lens, aspherical element method has become mainstream, aspheric lens manufacturing optical design is widely used in precision molding.

所谓精密模压,就是在一定的温度、压力下,用具有预定产品形状的高精密模具模压玻璃预制件,从而获得具有最终产品形状(或非常接近于最终产品形状)并具有光学功能面的玻璃制品。 The so-called precision press-molding, that is, at a certain temperature, pressure, high-precision die molding glass preform having a predetermined shape of the product, thereby obtaining a glass article having a final shape of the product (or very close to final product shape) and having an optical functional surface . 采用精密模压技术制造的非球面透镜通常不用再进行研磨抛光,从而达到高产率低成本的目的。 Using precision molding techniques for manufacturing the aspherical lens generally no further polishing, so as to achieve a high yield of low cost. 现在通过精密模压技术可以制造各种光学玻璃元件产品如球面透镜、非球面透镜、棱镜、衍射光栅等。 Now producing an optical glass element of various products such as a spherical lens, an aspherical lens, a prism, a diffraction grating by precision molding techniques.

在进行精密模压成型时,为了将高精密的模面复制在玻璃成型品上,需要在高温下(通常在玻璃软化点温度以上15-40℃)加压成型玻璃预制体,这时成型模被暴露在高温中且被施以较高的压力,即使处于保护气氛中,压型模具表面膜层依然容易被氧化、侵蚀。 During precision press molding, a high-precision in order to replicate the mold surface on a glass molded product, required at high temperatures (usually at a glass temperature above the softening point of 15-40 deg.] C) press molding the glass preform, when the mold is exposed and is applied with a high pressure at a high temperature, even in a protective atmosphere, pressure mold surface layer still easily oxidized erosion. 高精密的模具是光学玻璃精密模压工序中主要成本来源,模具使用达不到一定的压型次数,就不能实现低成本、高量产率的目的。 High-precision optical glass for precision press mold is a major cost source step, the mold falls below a predetermined number of times using the pressure type can not achieve the purpose of low cost, high volume production rates. 为延长模具寿命,抑制高温环境对成型模的损伤,希望尽可能降低压型温度,因此,要求玻璃材料的转变温度(Tg)和软化温度(Ts)尽可能低。 To extend the life of the mold, to mold a high temperature environment to suppress the damage as much as possible is desirable to reduce the temperature of the pressure type, therefore, the glass transition temperature of the material required (Tg) and softening temperature (Ts) as low as possible.

用于非球面透镜的光学玻璃,要求具有各种光学常数的玻璃,Nd为1.77-1.84,Vd为36-44的光学玻璃在现代高级成像设备中应用较多,含有铅、钍的该类光学玻璃因对环境有害已不生产和使用,不含铅、钍的该类光学玻璃通常为B2O3(SiO2)-La2O3-Nb2O5(Ta2O5)-RO(R代表碱土金属)体系,玻璃的软化温度通常远高于600℃,不适合用于精密模压。 An optical glass aspherical lens, a glass having various required optical constants, Nd is 1.77-1.84, Vd optical glass 36-44 is more advanced applications in modern imaging apparatus, containing lead, thorium such optical glass no longer harmful to the environment due to the production and use, lead, thorium such optical glass is usually B2O3 (SiO2) -La2O3-Nb2O5 (Ta2O5) -RO (R behalf of an alkaline earth metal) the softening temperature of the system, is generally much glass above 600 ℃, not suitable for precision molding.

美国专利USP20030032542公开了一种B2O3(SiO2)-La2O3-Gd2O3-Nb2O5-ZrO2体系的光学玻璃,该玻璃折射率在1.80以上,阿贝数在40左右,但玻璃的转变温度在650℃以上,不适合做精密模压材料。 U.S. Patent No. USP20030032542 discloses a B2O3 (SiO2) optical glass -La2O3-Gd2O3-Nb2O5-ZrO2 system, the glass refractive index 1.80, Abbe number of about 40, but above the glass transition temperature of 650 ℃, not suitable for precision molding materials. 中国专利02155831.0公开了一种B2O3-SiO2-La2O3-Gd2O3-ZnO-Li2O组成的光学玻璃系统,但玻璃的阿贝数难以达到43以下,且从其实施例看,玻璃成份中含有较多含量的价格昂贵的Ta2O5,玻璃成本较高,降低了产品竞争力。 Chinese Patent No. 02155831.0 discloses an optical glass system B2O3-SiO2-La2O3-Gd2O3-ZnO-Li2O composition, but the Abbe number of the glass is difficult to achieve 43 or less, and a view of its embodiments, the glass composition contains a higher content of expensive Ta2O5, the higher cost of the glass, reducing the competitiveness of products. 日本特开平06-305769公开了一种SiO2-B2O3-La2O3-Ta2O5-ZnO-Li2O系统精密压型用光学玻璃,该系统玻璃同样使用较多的Ta2O5,且玻璃的液相温度较高,不利于批量化生产。 Japanese Patent Laid-Open 06-305769 discloses a SiO2-B2O3-La2O3-Ta2O5-ZnO-Li2O-pressure system with a precision optical glass, the same glass system is used more Ta2O5, and a high liquidus temperature of the glass, is not conducive to mass production. 日本特开平2002-362938公开了一种B2O3-SiO2-La2O3-ZnO-Nb2O5-Ta2O5-WO3系统以及特开平2002-012443公开的B2O3-SiO2-La2O3-Li2O-ZnO-Nb2O5-Ta2O5-WO3系统,虽然能达到较低的软化温度,但都使用了一定量的Ta2O5,玻璃成本昂贵。 Japanese Unexamined Patent Publication 2002-362938 discloses a B2O3-SiO2-La2O3-ZnO-Nb2O5-Ta2O5-WO3 system, and B2O3-SiO2-La2O3-Li2O-ZnO-Nb2O5-Ta2O5-WO3 system disclosed in Laid-Open 2002-012443, although You can achieve a lower softening temperature, but use a certain amount of Ta2O5, glass expensive.

发明内容 SUMMARY

本发明所要解决的技术问题是提供一种高折射率低色散精密压型用光学玻璃,该光学玻璃不含铅、砷、镉等对环境有害物质,不含有价格昂贵的Ta2O5,玻璃软化温度满足精密模压要求。 The present invention is to solve the technical problem of providing a high refractive index and low dispersion optical glass for precision press-type, the optical glass is free of lead, arsenic, cadmium and other substances harmful to the environment, does not contain expensive Ta2O5, glass transition temperature satisfies precision molding requirements.

本发明解决技术问题所采用的技术方案是:高折射率低色散精密压型用光学玻璃,其重量百分比组成为:SiO2:1-8%、B2O3:16-30%、La2O3:15-40%、Gd2O3:0-20%、ZnO:8-30%、Nb2O5:0.5-14.5%、WO3:0-12.5%、TiO2:0-9%、Li2O:0.5-4%、ZrO2:1-10%、Y2O3:0-5%、Yb2O3:0-5%、Lu2O3:0-5%、Na2O:0-3%、K2O:0-2%、Al2O3:0-2%、BaO:0-3%、CaO:0-3%、SrO:0-3%、MgO:0-3%、Sb2O3:0-0.5%和SnO2:0-0.5%。 Solution to Problem The present invention adopts the following technical scheme: a high refractive index and low dispersion optical glass for precision press type, weight percent composition: SiO2: 1-8%, B2O3: 16-30%, La2O3: 15-40% , Gd2O3: 0-20%, ZnO: 8-30%, Nb2O5: 0.5-14.5%, WO3: 0-12.5%, TiO2: 0-9%, Li2O: 0.5-4%, ZrO2: 1-10%, Y2O3: 0-5%, Yb2O3: 0-5%, Lu2O3: 0-5%, Na2O: 0-3%, K2O: 0-2%, Al2O3: 0-2%, BaO: 0-3%, CaO : 0-3%, SrO: 0-3%, MgO: 0-3%, Sb2O3: 0-0.5% and SnO2: 0-0.5%.

本发明的有益效果是:本发明采用B2O3-SiO2-La2O3(Gd2O3)-ZnO系统,使用合理比例的Nb2O5、WO3、TiO2使玻璃达到所需要的光学常数且具有适于精密压型的良好物理化学特性。 Advantageous effects of the invention are: the present invention uses B2O3-SiO2-La2O3 (Gd2O3) -ZnO system, using a reasonable proportion of Nb2O5, WO3, TiO2 glass optical constants required to achieve a good physicochemical and suitable for precision press-type characteristic. 本发明的光学玻璃转变温度(Tg)低于560℃,组份中不含有高价格的Ta2O5,同时玻璃具有良好的化学稳定性,能在单坩埚或连续熔炼池炉等设备上批量稳定生产,适于低成本精密模压成型非球面透镜等光学元件。 The optical glass of the present invention, transition temperature (Tg) below 560 ℃, Ta2O5 component does not contain a high price, while glass has good chemical stability, can be stably produced in a single batch crucible or continuous melting tank furnaces and other equipment, adapted to low cost precision press molding an optical element aspherical lens.

具体实施方式 detailed description

根据实验确定上述组份的重量百分比范围,对上述各成份的作用及范围限定的理由叙述如下。 Experimentally determined parts of the above weight percentage ranges set in accordance with, the reasons for the role and scope of ingredients defined above are described below.

B2O3是玻璃网络生成体氧化物,是构成玻璃网络的必须成份,尤其是在高折射率的镧系玻璃中,B2O3是得到稳定玻璃的主要成份。 B2O3 is a glass network generation support oxide is the essential component constituting the glass network, especially lanthanum-based glass of high refractive index, B2O3 is a main component to obtain a stable glass. 当B2O3含量低于16%时,玻璃的熔化性能变坏,耐失透性能不理想;当B2O3含量高于30%,玻璃的折射率达不到设计目标,因此B2O3的优选含量(重量百分比含量,以下同)为16%-30%,更优选含量为19-26%。 When the B2O3 content is less than 16%, the melting property of the glass deteriorates devitrification unsatisfactory performance; when the B2O3 content is more than 30%, the refractive index of glass is less than the design goal, it is preferable B2O3 content (content by weight , hereinafter the same) was 16% -30%, and more preferably an amount of 19-26%.

SiO2也是形成玻璃的网络生成体氧化物,加入一定量的SiO2,可增大玻璃的高温粘度,提高玻璃的耐失透性及化学稳定性。 SiO2 is a network generating body is formed of an oxide glass, a quantity of SiO2 was added, the high temperature viscosity of the glass can be increased to improve the devitrification resistance and chemical stability of the glass. 当其含量不足1%时,玻璃的生产工艺性能差,即前述作用不明显,若超过8%玻璃折射率下降,耐失透性变差,同时生产时原料熔化困难,因此SiO2含量优选为1-8%,更优选含量为1-6%。 When the content is less than 1%, the difference in properties of the glass manufacturing process, i.e., the effect is not obvious, if the refractive index of glass exceeds 8% decrease, devitrification resistance is deteriorated, while when the melting of raw materials is difficult, so the content of SiO2 is preferably 1 8%, and more preferably an amount of 1-6%.

La2O3是高折射低色散镧系光学玻璃的主要成份,用于增加玻璃的折射率且不会明显提高玻璃的色散,在本发明中与B2O3混合存在时可提高玻璃的耐失透性能,改善玻璃的化学稳定性。 La2O3 is the main component of high refractive and low dispersion optical glass lanthanide, and for increasing the refractive index of glass will not significantly improve the dispersion of the glass, can improve the resistance to devitrification property of the glass when mixed with B2O3 in the present invention, the improved glass chemical stability. 当La2O3含量小于15%时,不能获得上述作用,当其含量超过40%时,玻璃的析晶性能恶化,因此La2O3含量优选为15-40%。 When the La2O3 content is less than 15%, the above effects can not be obtained, when the content exceeds 40%, devitrification properties of the glass deteriorate, so the content is preferably 15-40% La2O3.

Gd2O3的作用与La2O3类似,也是增加玻璃的折射率且不会明显提高玻璃的色散,在物理化学性能上起到改善玻璃化学稳定性和耐失透能力的作用。 La2O3 and Gd2O3 similar effect, but also increasing the refractive index of glass and does not significantly improve the dispersion of the glass, the glass acts to improve the chemical stability and devitrification resistance capacity in the physical and chemical properties. 使用一定量的Gd2O3代替La2O3,可以适当提高玻璃的耐失透能力,但可引起玻璃比重的增大。 Instead of using a quantity of Gd2O3 La2O3, devitrification resistance can be suitably improved ability glass, but can cause increased glass proportion. 当Gd2O3含量高于20%时,玻璃的耐失透能力恶化,因此Gd2O3的含量优选为0-20%,更优选为5-15%。 When Gd2O3 content is more than 20%, the devitrification resistance is deteriorated capacity glass, so the content of Gd2O3 is preferably 0-20%, more preferably 5-15%.

在本发明中,为保证玻璃的高折射率低色散光学性能,要求La2O3和Gd2O3的总含量不少于20%,但当La2O3和Gd2O3的总含量高于45%时,玻璃的稳定性变差,耐失透能力下降,软化温度急剧升高,因此La2O3和Gd2O3的总含量优选为20-45%。 In the present invention, in order to ensure a high refractive index and low dispersion optical properties of the glass, the total content of La2O3 and Gd2O3 requirement of less than 20%, but the total content of La2O3 and Gd2O3 is higher than 45%, stability of the glass deteriorates devitrification capacity decreased sharply increased softening temperature, and therefore the total content of La2O3 and Gd2O3 is preferably 20 to 45%.

ZnO是本发明玻璃的必须成份,有利于降低玻璃的熔化温度和软化温度,并有调整玻璃光学性能的作用。 ZnO is a glass composition of the present invention must, help to reduce the melting temperature and glass softening temperature, and adjust the optical properties of the glass effect. 当其含量不足8%时,玻璃的软化温度上升;而当其含量高于30%时,玻璃的色散增大,析晶倾向增大,同时玻璃的高温粘度变小,给玻璃成型带来很大困难,因此ZnO的含量优选为8-30%,更优选为12-28%。 When the content is less than 8%, the softening temperature of the glass rises; and when it is more than 30%, the dispersion of the glass increases, crystallization tends to increase, while the high temperature viscosity of the glass becomes smaller, it is brought to the glass forming great difficulty, so ZnO content is preferably 8-30%, more preferably 12-28%.

Nb2O5是提高玻璃折射率的有效成份,当其含量不到0.5%时,玻璃的折射率达不到设计目标,而当其含量高于14.5%时,会导致玻璃软化温度升高,同时使玻璃的透过率大幅下降,因此Nb2O5的含量优选为0.5-14.5%。 Nb2O5 is an effective component to improve the refractive index of glass, when the content is less than 0.5%, the refractive index of glass is less than the design target, while when it is more than 14.5%, would result in the glass softening temperature, while the glass the sharp decline in transmittance, thus Nb2O5 content is preferably 0.5-14.5%.

WO3具有提高玻璃折射率和色散以及改善玻璃析晶性能的作用,但实验表明当其含量超过12.5%时,玻璃的耐失透能力反而降低,所以WO3的优选含量为0-12.5%,更优选含量0-8%。 WO3 having improved glass refractive index and dispersion properties as well as improved glass crystallization effect, but experiments show that when the content thereof exceeds 12.5%, the devitrification resistance of the glass but lower capacity, it is preferable that the content of WO3 is 0-12.5%, more preferably content of 0-8%.

TiO2对于提高玻璃的折射率和色散很有效,并能提高玻璃的耐水性,降低玻璃比重,在本发明中,TiO2还起到增大玻璃高温粘度以改善玻璃析晶性能的作用。 TiO2 is effective for improving refractive index and dispersion of the glass, and to improve the water resistance of the glass, reducing the proportion of glass in the present invention, TiO2 also serves to improve the high temperature viscosity of the glass increase glass crystallization performance effect. 但其含量过高会造成玻璃着色。 But its content is too high will cause the glass coloration. 因此TiO2含量优选为0-9%。 Thus TiO2 content is preferably 0-9%.

上述Nb2O5、WO3和TiO2的含量之和为6.5-24%。 Above Nb2O5, WO3 and the content of TiO2, and 6.5-24%.

Li2O是降低玻璃的转变温度和软化温度的最有效成份,Li2O还有较强助熔作用。 Li2O ingredient is the most effective to reduce the softening temperature of the glass transition temperature and a, there is a strong fluxing action Li2O. 当其含量低于0.5%时,对降低转变温度效果不明显;但当含量高于4%时,玻璃的耐失透性急剧下降,因此Li2O的优选含量为0.5-4%,更优选含量为0.5-3%。 When the content is less than 0.5%, little effect on the transition temperature decreased; but when the content is more than 4%, a sharp decline in the resistance to devitrification of the glass, so the content of Li2O is preferably 0.5-4%, and more preferably in an amount 0.5-3%.

ZrO2具有改善玻璃耐失透性、提高化学稳定性的效果,在镧系玻璃中,还起到提高折射率降低色散的作用。 ZrO2 having improved resistance to devitrification of the glass, the effect of improving the chemical stability of the lanthanum-based glass, also serves to increase the refractive index dispersion effects decrease. 但其含量低于1%时,起不到上述作用;当其含量高于10%时,引起玻璃软化温度上升,同时玻璃耐失透性恶化。 However, when the content is less than 1%, the above effects would not achieve; when it is more than 10%, causing the glass softening temperature is increased, and the glass devitrification resistance deteriorates. 因此ZrO2的优选含量为1-10%。 Thus the content of ZrO2 is preferably 1 to 10%.

Y2O3、Yb2O3和Lu2O3具有提高玻璃稳定性和耐失透性能的作用,还可以调整玻璃的光学常数,但当含量超过5%,会引起玻璃转变温度升高,因此Y2O3优选含量为0-5%,更优选不加入;Yb2O3优选含量为0-5%,更优选不加入;Lu2O3优选含量为0-5%,更优选不加入。 Y2O3, of Yb2O3 and Lu2O3 to enhance glass stability and devitrification resistance performance effect may also adjust optical constants of the glass, but when the content exceeds 5%, will cause the glass transition temperature, and therefore the content of Y2O3 is preferably 0 to 5% , more preferably not added; the content of Yb2O3 is preferably 0 to 5%, more preferably not added; of Lu2O3 content is preferably 0-5%, more preferably not added.

Na2O具有降低玻璃转变温度,提高玻璃透明度的作用,但当其含量超过3%,会增大玻璃的析晶倾向,同时显著降低玻璃的折射率,因此Na2O优选含量为0-3%,更优选含量为0-1%。 Na2O having a reduced glass transition temperature and improving the transparency of the glass. However, when the content thereof exceeds 3%, devitrification tendency of the glass increases, and while significantly reducing the refractive index of the glass, thus Na2O content is preferably 0-3%, more preferably content of 0-1%.

K2O的作用与Na2O类似,其优选含量为0-2%,更优选不加入。 Na2O and K2O similar effect, the content thereof is preferably 0-2%, more preferably not added.

Al2O3可以提高玻璃的化学稳定性,增大玻璃高温粘度,但当其含量高于2%,会引起玻璃的耐失透性下降,增加熔融难度。 Al2O3 may improve the chemical stability of the glass high temperature viscosity of the glass increases, but when it is more than 2%, the glass will cause a decrease in resistance to devitrification, increase the difficulty of melting. 因此Al2O3优选为0-2%,更优选不加入。 Thus Al2O3 preferably 0-2%, more preferably not added.

BaO可以降低玻璃的色散,同时改善玻璃的透过率。 BaO-dispersion glass can be reduced, while improving the transmittance of the glass. 但当含量超过3%,不能达到玻璃的折射率目标,同时会增大玻璃的析晶倾向。 When the content exceeds 3%, the refractive index can not achieve the objectives of the glass, the devitrification tendency increases while the glass. 因此BaO优选法含量为0-3%。 Thus BaO content is preferably 0-3% law.

CaO可以提高玻璃的化学稳定性,并有助熔作用,但其含量高于3%时玻璃的析晶倾向增大。 CaO can improve the chemical stability of the glass melting and help effect, but its content is higher than the devitrification tendency of the glass increases 3%. 因此CaO优选含量为0-3%,更优选不加入。 Thus CaO content is preferably 0-3%, more preferably not added.

MgO和SrO的作用与CaO类似,可以提高玻璃的均质性。 The role of MgO and CaO, and SrO similar, can improve the homogeneity of the glass. MgO优选含量为0-3%,更优选不加入;SrO优选含量为0-3%,更优选不加入。 MgO content is preferably 0-3%, more preferably not added; of SrO content is preferably 0-3%, more preferably not added.

Sb2O3和SnO2作为除泡剂使用,Sb2O3优选含量为0-0.5%,更优选不加入;SnO2优选含量为0-0.5%,更优选不加入。 Sb2O3 and SnO2 as a defoaming agent, Sb2O3 content is preferably 0 to 0.5%, more preferably not added; SnO2 content is preferably 0 to 0.5%, more preferably not added.

考虑对环境无污染,本发明不使用PbO、As2O3和CdO等成份。 Consideration of environmental pollution, the present invention does not use PbO, As2O3 and CdO and other ingredients.

本发明的生产方法是:将组成成份对应的氧化物、氢氧化物、碳酸盐、硝酸盐原料,按比例称量,充分混合后加入铂金坩埚或连续熔炼池炉内,在1240-1320℃下熔化、澄清和均化后降温,将熔融玻璃液浇注到预热后的金属模具内,将玻璃连同金属模一起放入退火炉内,徐冷退火后即得。 Production method of the present invention is: corresponding to the constituent oxides, hydroxides, carbonates, nitrates raw materials, weighed to scale, mixed well was added a platinum crucible or melting pool continuous furnace at 1240-1320 ℃ melted, clarified and homogenized after cooling, the molten glass was cast into a preheated mold, the mold together with the glass together into an annealing furnace, too slow cooling after annealing.

以下是本发明的实施例,但本发明并不受这些实施例的限制。 The following are examples of the present invention, but the present invention is not limited to these examples.

实施例:1-24表1、表2、表3和表4列出了本发明的24个实施例和3个比较例,表中列出了玻璃的折射率(Nd)、阿贝数(Vd)、转变温度(Tg)、密度(d)以及透过率为80%和5%的波长比(分别用λ80、λ5表示)。 Example: 1-24 Table 1, Table 2, Table 3 and Table 4 lists the 24 embodiment of the present invention and Comparative Example 3, the table lists the refractive index of glass (Nd), Abbe number ( Vd), transition temperature (Tg), density (d) and a transmittance of 80% and 5% of the wavelength ratio (respectively λ80, λ5 shown).

表1 Table 1

表2 Table 2

表3 table 3

表4从以上实施例可以看出:本发明光学玻璃的折射率(Nd)为1.77-1.84,阿贝数(Vd)为35-43,玻璃转变温度不超过560℃,化学稳定性优异,耐失透性及着色度良好,比重小,非常适于精密模压成型非球面透镜、球面透镜等光学元件,并且玻璃组份中不含有价格昂贵的Ta2O5原料,成本低廉,具有市场竞争优势。 Table 4 it can be seen from the above embodiments: the refractive index of the optical glass of the present invention (Nd) of 1.77-1.84, an Abbe number (Vd) of 35-43, a glass transition temperature does not exceed 560 ℃, excellent chemical stability, corrosion devitrification and good coloration degree, the proportion of small, very suitable for precision press molding an optical element aspherical lens, a spherical lens or the like, and does not contain glass components Ta2O5 expensive raw materials, low cost, has a competitive advantage.

Claims (5)

  1. 1.高折射率低色散精密压型用光学玻璃,其特征在于:其重量百分比组成为:SiO2:1-8%、B2O3:16-30%、La2O3:15-40%、Gd2O3:0-20%、ZnO:8-30%、Nb2O5:0.5-14.5%、WO3:0-12.5%、TiO2:0-9%、Li2O:0.5-4%、ZrO2:1-10%、Y2O3:0-5%、Yb2O3:0-5%、Lu2O3:0-5%、Na2O:0-3%、K2O:0-2%、Al2O3:0-2%、BaO:0-3%、CaO:0-3%、SrO:0-3%、MgO:0-3%、Sb2O3:0-0.5%和SnO2:0-0.5%。 1. The high refractive index and low dispersion optical glass for precision press type, characterized in that: the weight percent composition: SiO2: 1-8%, B2O3: 16-30%, La2O3: 15-40%, Gd2O3: 0-20 %, ZnO: 8-30%, Nb2O5: 0.5-14.5%, WO3: 0-12.5%, TiO2: 0-9%, Li2O: 0.5-4%, ZrO2: 1-10%, Y2O3: 0-5% , Yb2O3: 0-5%, Lu2O3: 0-5%, Na2O: 0-3%, K2O: 0-2%, Al2O3: 0-2%, BaO: 0-3%, CaO: 0-3%, SrO: 0-3%, MgO: 0-3%, Sb2O3: 0-0.5% and SnO2: 0-0.5%.
  2. 2.如权利要求1所述的高折射率低色散精密压型用光学玻璃,其特征在于:其重量百分比组成为:SiO2:1-6%、B2O3:19-26%、La2O3:15-40%、Gd2O3:5-15%、ZnO:12-28%、Nb2O5:0.5-14.5%、WO3:0-8%、TiO2:0-9%、Li2O:0.5-3%、ZrO2:1-10%、Na2O:0-1%和BaO:0-3%。 2. The high refractive index and low dispersion of claim 1 Precision pressed glass optical type, wherein: the weight percent composition of: SiO2: 1-6%, B2O3: 19-26%, La2O3: 15-40 %, Gd2O3: 5-15%, ZnO: 12-28%, Nb2O5: 0.5-14.5%, WO3: 0-8%, TiO2: 0-9%, Li2O: 0.5-3%, ZrO2: 1-10% , Na2O: 0-1% and BaO: 0-3%.
  3. 3.如权利要求1或2所述的高折射率低色散精密压型用光学玻璃,其特征在于:所述La2O3和Gd2O3的重量百分比之和为20-45%。 A high refractive index as claimed in claim 1 or 2, the low-dispersion optical glass for precision press type, characterized in that: the sum of the percentages by weight of La2O3 and Gd2O3 and 20 to 45%.
  4. 4.如权利要求1或2所述的高折射率低色散精密压型用光学玻璃,其特征在于:所述Nb2O5、WO3和TiO2的重量百分比之和为6.5-24%。 4. The high refractive index of claim 1 or claim 2 low-dispersion optical glass for precision press type, characterized in that: said weight percentage of Nb2O5, WO3 and TiO2, and was 6.5-24%.
  5. 5.根据权利要求1或2所述的高折射率低色散精密压型用光学玻璃,其特征在于:所述光学玻璃的转变温度不超过560℃。 5. The high refractive index to claim 1 or 2, low-dispersion optical glass for precision press type, characterized in that: the optical glass transition temperature of not more than 560 ℃.
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