Titanium-containing high-lanthanum and low-niobium optical glass preparation method

A kind of optical glass and glass technology, which is applied in the field of preparation of high-lanthanum and low-niobium optical glass, can solve the problems of glass crystallization that cannot be solved, the tendency of glass crystallization is large, and increase glass erosion, so as to shorten the time of glass clarification and homogenization , The tendency of glass devitrification is small, and the effect of less glass defects

Active Publication Date: 2016-01-13
湖北戈碧迦光电科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the crystallization tendency of the glass in this system is large, and the temperature of the glass in small batches is cooled quickly. The problem of glass crystallization in large-scale production cannot be solved, and the large amount of SrO and BaO components will increase the density of the glass and increase the erosion of the glass on the crucible.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A preparation method of titanium-containing high-lanthanum and low-niobium optical glass,

[0042] The first step, batch preparation

[0043] 1) Weigh 16wt% of quartz sand, 1wt% of germanium oxide, 11wt% of niobium pentoxide, 8wt% of titanium dioxide, 16wt% of calcium carbonate, 26wt% of lanthanum trioxide, 10wt% of Anhydrous boric anhydride, 2wt% barium nitrate, 4wt% barium carbonate, 3wt% anhydrous sodium nitrate, 1.07wt% zirconium dioxide, 1.90wt% gallium oxide, 0.03wt% antimony trioxide;

[0044] 2) Sodium nitrate and barium nitrate are crushed through a wheel mill and a vibrating sieve so that they can completely pass through a 30-mesh standard sieve;

[0045] 3) Put the weighed anhydrous boric anhydride, barium nitrate, sodium nitrate, calcium carbonate, and antimony trioxide into the V-shaped mixer and mix for 12 minutes to form a small mixed material;

[0046] 4) Put the well-mixed small material and the remaining several other raw materials into the QH-type p...

Embodiment 2

[0066] A preparation method of titanium-containing high-lanthanum and low-niobium optical glass,

[0067] The first step, batch preparation

[0068] 1) Weigh 17wt% quartz sand, 1.5wt% germanium oxide, 10wt% niobium pentoxide, 9.5wt% titanium dioxide, 14wt% calcium carbonate, 24wt% lanthanum trioxide, 9.5 The anhydrous boric anhydride of wt%, the barium nitrate of 2.5wt%, the barium carbonate of 4.5wt%, the anhydrous sodium nitrate of 1wt%, the zirconium dioxide of 3.96wt%, the gallium oxide of 2.50wt%, the three Antimony oxide;

[0069] 2) Sodium nitrate and barium nitrate are crushed through a wheel mill and a vibrating sieve so that they can completely pass through a 30-mesh standard sieve;

[0070] 3) Put the weighed anhydrous boric anhydride, barium nitrate, sodium nitrate, calcium carbonate, and antimony trioxide into a V-shaped mixer and mix for 15 minutes to form a small mixed material;

[0071] 4) Put the uniformly mixed small material and the remaining several othe...

Embodiment 3

[0090] A preparation method of titanium-containing high-lanthanum and low-niobium optical glass,

[0091] The first step, batch preparation

[0092] 1) Weigh 19wt% quartz sand, 2wt% germanium oxide, 9wt% niobium pentoxide, 9.5wt% titanium dioxide, 13wt% calcium carbonate, 22.45wt% lanthanum trioxide, 10wt % anhydrous boric anhydride, 1.2wt% barium nitrate, 6wt% barium carbonate, 2.5wt% anhydrous sodium nitrate, 2.8wt% zirconium dioxide, 2.5wt% gallium oxide, 0.05wt% trioxide Antimony;

[0093] 2) Sodium nitrate and barium nitrate are crushed through a wheel mill and a vibrating sieve so that they can completely pass through a 30-mesh standard sieve;

[0094] 3) Put the weighed anhydrous boric anhydride, barium nitrate, sodium nitrate, calcium carbonate, and antimony trioxide into the V-shaped mixer and mix for 18 minutes to form a small mixed material;

[0095] 4) Put the uniformly mixed small material and the remaining several other raw materials into the QH type powerful ...

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Abstract

The invention discloses a titanium-containing high-lanthanum and low-niobium optical glass preparation method comprising the following steps: (1) uniformly mixing the following raw materials: quartz sand, germanium oxide, niobium pentoxide, titanium dioxide, calcium carbonate, lanthanum trioxide, anhydrous boric anhydride, barium nitrate, barium carbonate, anhydrous sodium nitrate, zirconium dioxide, gallium oxide and antimonous oxide to prepare a mixture material; (2) high-temperature melting the mixture material in an air atmosphere to obtain glass liquid; (3) cast-moulding the glass liquid and rapidly cooling the glass to room temperature; (4) crushing the glass, adding less amount of raw materials and re-melting the glass in a four-grade melting furnace; (5) stirring, clarifying and homogenizing the glass liquid and moulding glass; and (6) performing inspection and secondary annealing to prepare the titanium-containing high-lanthanum and low-niobium optical glass. The optical glass is high in refractive index, is low in chromatic dispersion and is high in light transmittance, is low in crystallization tendency, is excellent in chemical stability, is free of heavy metal oxides, such as Gd2O3, Ta2O5, Y2O3, PbO, WO3 and the like, can achieve large size, zero defect and continuous production, is simple in preparation process, is low in cost and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of optical glass, and in particular relates to a preparation method of titanium-containing high-lanthanum and low-niobium optical glass. Background technique [0002] Lanthanide optical glass is widely used in various optical instruments due to its high refractive index and low dispersion, such as digital cameras, digital video cameras, CDROMs, scanners and other digital optoelectronic products. The electronic shell structure of lanthanum is (Xe)5d 1 6S 2 , easy to lose 5d, 6s electrons after the electron layer distribution is inert, electronegativity is 1.2. Often La in optical glass 3+ Ionic interstitials are combined with oxygen by ionic bonds in the structural gaps of the boron-oxygen group, and the weaker lanthanum-oxygen bonds with lanthanum oxygen to fix a certain direction and changeable coordination relationship can even migrate together in its form; La 3+ for 4f 1 , and not easily polarize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/068
Inventor 虞国强
Owner 湖北戈碧迦光电科技股份有限公司
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