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Infrared transmitting germanate glass and preparation method thereof

A technology of germanate glass and infrared transmission, applied in the field of germanate glass, can solve the problems of crystallization performance, mechanical strength stability, poor process performance, low water content, low dispersion, etc., to achieve enhanced physical and chemical properties, Effect of improving glass capacity and reducing group content

Active Publication Date: 2011-05-11
HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both heavy metal oxide glass and fluoride glass have good transmission properties in the ultraviolet, near-infrared, and mid-infrared bands. Fluoride glass has the advantages of low refraction, low dispersion, high transmittance, and low water content. Glass is inferior to heavy metal oxide glass in terms of crystallization performance, mechanical strength, chemical stability, and process performance.

Method used

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  • Infrared transmitting germanate glass and preparation method thereof
  • Infrared transmitting germanate glass and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) According to 38% GeO 2 -26%AL 2 o 3 -36%CaO (mol percent) Calculate the weight percent of each component, then take the raw material and mix it uniformly in a ball mill jar;

[0025] (2) Add the mixture into a 0.3L platinum crucible, the feeding temperature is 1480°C, and the feeding time is 1 hour;

[0026] (3) After the glass is melted, the temperature is raised to 1520°C, and a dry gas is introduced on the surface of the molten glass for 6 hours, and at the same time, a platinum stirrer is used to stir, homogenize and clarify;

[0027] (4) After slowly lowering the furnace temperature to 1450°C, pour the molten glass into a preheated mold for molding (casting into a rectangular shape);

[0028] (5) Quickly put the glass into the muffle furnace that has been heated to the transition temperature. After 2 hours of heat preservation, it is annealed at a speed of -10°C / h to 200°C, and then the power is turned off and then lowered to room temperature to obtain a col...

Embodiment 2

[0031] (1) According to 45% GeO 2 -15%Ga 2 o 3 -24%BaO-3%ZrO 2 -10%TiO 2 -3% La 2 o 3 (Mole percent) calculate the weight percent of each component, then take by weighing raw material, mix homogeneously in ball mill jar;

[0032] (2) Add the mixture into a 0.3L platinum crucible, the feeding temperature is 1350°C, and the feeding time is 1 hour;

[0033] (3) After the glass is melted, the temperature is raised to 1400°C, and a dry gas is introduced on the surface of the molten glass for 6 hours. At the same time, a platinum stirrer is used to stir and homogenize and clarify;

[0034] (4) After slowly lowering the furnace temperature to 1300°C, pour the molten glass into a preheated mold for molding (casting into a rectangular shape);

[0035] (5) Quickly put the glass into the muffle furnace that has been heated to the transition temperature. After 2 hours of heat preservation, it is annealed at a speed of -10°C / h to 200°C, then the power is turned off and the temperatu...

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Abstract

The invention relates to infrared transmitting germanate glass and a preparation method thereof, and belongs to the technical field of germanate glass. The invention mainly provides infrared transmitting germanate glass with excellent physiochemical performance and infrared transmitting performance and a preparation method thereof. The germanate glass comprises the following components of: 35 to 45 percent of GeO2, 15 to 30 percent of M2O3, 25 to 40 percent of M'O, 0 to 15 percent of M''O2 and 0 to 5 percent of La2O3, wherein M2O3 is Al2O3, Ga2O3 and the like; M'O is MgO, CaO, BaO and the like; and M''O2 is ZrO2, TiO2 and the like. The preparation method comprises the following steps of: a, weighing raw materials, and mixing uniformly in a ball-milling tank; b, melting in a platinum crucible; c, after melting, introducing dry gas on the surface of glass liquid to remove moisture in the glass liquid, and stirring, homogenizing and clarifying by using a platinum stirrer simultaneously; d, homogenizing and clarifying the liquid, and forming in a die; and e, annealing. The infrared transmitting germanate glass has the excellent physiochemical and infrared performance, the transformation temperature is between 650 and 750 DEG C, the infrared cut-off wavelength is more than 6 micrometers, the ultraviolet cut-off wavelength is less than 400 nanometers, and the vickers hardness is more than 650 kgf / mm<2>. The invention is mainly used for the infrared transmitting germanate glass and the preparation method thereof.

Description

technical field [0001] The invention belongs to the technical field of germanate glass, and in particular relates to an infrared-transmitting germanate glass containing heavy metal oxides and a preparation method thereof. Background technique [0002] Commonly used mid-infrared window materials require high transmittance in the mid-infrared band (3-5 μm). Such materials mainly include crystals, glass, etc., and crystal materials mainly include MgF 2 , ZnS, spinel, sapphire and other crystals, MgF 2 1. ZnS has high infrared transmittance, and it is easy to make the required shape of the cover, but the material itself is soft, and the transmittance of spinel is slightly worse than that of ZnS, but its hardness is more than ten times that of ZnS, and its fracture toughness is high. , Strong thermal shock resistance, but difficult to manufacture, difficult to process, sapphire transmittance is similar to spinel, but hardness and fracture toughness are 40% higher than spinel, ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/253
Inventor 赵仲勋
Owner HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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