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Lanthanum titanate-based glass sheet as well as preparation method and application of lanthanum titanate-based glass sheet

A technology of glass flakes and lanthanum titanate, which is applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of increasing the crystallization activation energy of samples and complex glass network structure, so as to preserve optical properties and increase power The effect of optical window and excellent optical performance

Pending Publication Date: 2018-12-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main component of the lanthanum titanate-based glass designed by the present invention is LaO 3 / 2 、TiO 2 and other third oxides, wherein the addition of other third oxides can make the glass network structure more complex, increase the activation energy of crystallization of the sample, and inhibit the crystallization of the sample, thereby increasing the kinetic window of the lanthanum titanate-based glass, Improve the forming ability of lanthanum titanate-based glass, and overcome the problem that lanthanum titanate-based glass cannot be prepared by traditional melting cooling method

Method used

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  • Lanthanum titanate-based glass sheet as well as preparation method and application of lanthanum titanate-based glass sheet
  • Lanthanum titanate-based glass sheet as well as preparation method and application of lanthanum titanate-based glass sheet
  • Lanthanum titanate-based glass sheet as well as preparation method and application of lanthanum titanate-based glass sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] (1) Raw material powder La 2 o 3 、TiO 2 and silicon oxide by LaO 3 / 2 :TiO 2 : The silicon oxide molar ratio is 30.8:59.2:10.0, weighed, mixed evenly, and calcined at 1200°C for 2 hours. The calcined powder was pressed into a block under a pressure of 10 MPa, and then divided into 40 mg container-free solidified raw material;

[0080] (2) Pneumatically suspend the non-container solidified raw material in oxygen to make it stably suspended in the air, semiconductor laser and CO 2The laser is heated to 2200°C at the same time to make the non-container solidified raw material into a molten state for 2 minutes, and then cooling at a cooling rate of 300°C / s to obtain glass pellets with a diameter of 3mm;

[0081] (3) After crushing the glass balls, glass powder with a particle size of 50 μm was obtained. Under vacuum conditions, the glass powder was placed in a graphite mold with a diameter of 20 mm, and the temperature was raised to 860 ° C at a heating rate of 10 ° C / ...

Embodiment 2

[0084] The difference with Example 1 is that in step (1) LaO 3 / 2 :TiO 2 :SiO2 2 The molar ratio is 27.4:52.6:20.

Embodiment 3

[0086] The difference with Example 1 is that in step (1) LaO 3 / 2 :TiO 2 :SiO2 2 The molar ratio is 32.5:62.5:5.

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Abstract

The invention relates to a lanthanum titanate-based glass sheet as well as a preparation method and application of the lanthanum titanate-based glass sheet. The glass comprises LaO3 / 2, TiO2 and otherthird oxides, the glass phase is La4Ti9O24, and the lanthanum titanate-based glass has the diameter of larger than or equal to 10mm, the refractive index of 2.0-2.5 and the abbe number of 15-25. The preparation method of the lanthanum titanate-based glass comprises the steps: (1) uniformly mixing powders of LaO3 / 2, TiO2 and other third oxides according to the amount specified in a formula to obtain a raw material mixture, and carrying out pretreatment to obtain a raw material for container-free solidification; (2) carrying out container-free solidification treatment on the obtained raw material for container-free solidification to obtain a glass raw material; and (3) smashing glass beads to obtain glass powder, and carrying out pressurized heat treatment on the glass powder according to apreset shape to obtain a glass raw material. By using the method disclosed by the invention, the limit of a traditional melt cooling method is broken, the problem that devitrification is easily causedin a process of preparing a lanthanum titanate-based glass material is solved, and the lanthanum titanate-based glass material is successfully obtained.

Description

technical field [0001] The invention belongs to the technical field of optical glass materials, and specifically relates to a lanthanum titanate-based glass sheet, a preparation method and application thereof, and the lanthanum titanate-based glass sheet is used in the fields of lens materials, up-conversion luminescent matrix materials, and the like. Background technique [0002] In recent years, with the continuous development and progress of digital cameras, video cameras, medical endoscopes, and microscopes, optical components used in lenses are required to have better optical properties, such as higher refractive index and lower dispersion. The refractive index of glass obtained by the traditional melting cooling method is difficult to have a higher breakthrough, and it is increasingly unable to meet the needs of the market. [0003] Lanthanum titanate-based glass material is a new type of non-network former glass, which has excellent optical properties due to its speci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/062C03C3/12C03B19/06G02C7/02G02B1/00
CPCC03B19/06C03C3/062C03C3/127G02B1/00G02C7/02
Inventor 李建强王椎李晓禹
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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