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A kind of preparation method of high lanthanum low niobium optical glass containing titanium

An 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 unsolvable glass crystallization problems, large glass crystallization tendency, increased glass erosion, etc., so as to shorten the glass clarification and homogenization time. , The effect of less glass crystallization tendency and less glass defects

Active Publication Date: 2018-03-06
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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  • A kind of preparation method of high lanthanum low niobium optical glass containing titanium
  • A kind of preparation method of high lanthanum low niobium optical glass containing titanium

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

[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 powerful mixe...

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 wt% anhydrous boric anhydride, 2.5 wt% barium nitrate, 4.5 wt% barium carbonate, 1 wt% anhydrous sodium nitrate, 3.96 wt% zirconium dioxide, 2.50 wt% gallium oxide, 0.04 wt% Antimony trioxide;

[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 other raw materials into the QH type po...

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% of quartz sand, 2wt% of germanium oxide, 9wt% of niobium pentoxide, 9.5wt% of titanium dioxide, 13wt% of calcium carbonate, 22.45wt% of Lanthanum, 10 wt% anhydrous boric anhydride, 1.2 wt% barium nitrate, 6 wt% barium carbonate, 2.5 wt% anhydrous sodium nitrate, 2.8 wt% zirconium dioxide, 2.5 wt% gallium oxide, 0.05 wt% antimony trioxide;

[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...

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Abstract

The invention discloses a preparation method of titanium-containing high-lanthanum and low-niobium optical glass. Firstly, quartz sand, germanium oxide, niobium pentoxide, titanium dioxide, calcium carbonate, dilanthanum trioxide, anhydrous boric anhydride, barium nitrate, Barium carbonate, anhydrous sodium nitrate, zirconium dioxide, gallium oxide, and antimony trioxide are uniformly mixed to obtain batch materials; then melted into molten glass at high temperature in an air atmosphere, then cast the molten glass into shape, and rapidly cool to room temperature, After crushing, add a small amount of raw materials and put it into a fourth-stage melting furnace for re-melting. After stirring, clarification and homogenization, it will be shaped. After inspection and secondary annealing, the titanium-containing high-niobium and low-lanthanum optical glass can be obtained. The optical glass has high refractive index, small dispersion, high light transmittance, low glass crystallization tendency, excellent chemical stability, does not contain heavy metal oxides Gd2O3, Ta2O5, Y2O3, PbO, WO3, etc., and can achieve large size and zero defects. , continuous production, and the preparation process is simple in operation and low in cost, and is suitable for industrialized 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 polarized, i...

Claims

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Application Information

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Patent Type & Authority Patents(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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