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Alkali metal lanthanum bismuthate gallate infrared optical glass and method for making same

A metal lanthanum bismuth gallate, infrared optics technology, applied in the field of glass, can solve the problems of poor chemical stability of fluoride glass and sulfide glass, complicated production process, easy crystallization, etc., and achieve the effect of good chemical stability

Inactive Publication Date: 2008-05-21
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Existing infrared transmission glasses have their own disadvantages. Heavy metal fluoride glass has a wide range of infrared transmission, but it is easy to crystallize when making large-sized or thick samples. The chemical stability of fluoride glass and sulfide glass is poor. , and its production process is more complex

Method used

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  • Alkali metal lanthanum bismuthate gallate infrared optical glass and method for making same
  • Alkali metal lanthanum bismuthate gallate infrared optical glass and method for making same
  • Alkali metal lanthanum bismuthate gallate infrared optical glass and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) The molar composition of each component is: 35% Bi 2 o 3 , 45% Ga 2 o 3 , 10% La 2 o 3 , 10%K 2 O;

[0039] 2) Take by weighing a total amount of 50 grams, and mix it uniformly in a mortar;

[0040] 3) Move the uniformly mixed powder in 2) to a platinum crucible, put it in an electric furnace and heat it to 1200°C, and keep it for 3 hours;

[0041] 4) Pour the melt into a stainless steel mold, cool it naturally, and then put it into a muffle furnace for annealing. The annealing process is controlled by a program, and the temperature is kept at 400°C for 24 hours, and then cooled to room temperature;

[0042] 5) The glass sample is cut, finely ground and polished into a 20×20×2 mm sample.

[0043] 6) Meticon Model 2010 Prism Coupler waveguide analyzer is used to test its refractive index to be 2.41.

[0044] 7) SDT Q600 thermogravimetric analyzer was used to test the thermal properties, and the difference ΔT between the crystallization temperature and the tra...

Embodiment 2

[0048] The molar composition of each component is: 40% Bi 2 o 3 , 42% Ga 2 o 3 , 8% La 2 o 3 , 10% Na 2 O;

[0049] According to the preparation method of Example 1, the temperature in step 3) is controlled at 1000° C. and kept for 5 hours; the annealing temperature in step 4) is 300° C. and kept for 20 hours. The refractive index of the obtained infrared optical glass is 2.414, the difference ΔT between crystallization temperature and transition temperature is about 130°C, its infrared transmittance is shown in Figure 2, and its infrared transmission range is from 0.46 μm to 7.2 μm.

Embodiment 3

[0051] The molar composition of each component is: 45% Bi 2 o 3 , 30% Ga 2 o 3 , 5% La 2 o 3 , 10%K 2 O, 10% Na 2 O;

[0052] According to the preparation method of Example 1, the temperature in step 3) is controlled at 1300° C. and kept for 2 hours; the annealing temperature in step 4) is 350° C. and kept for 30 hours. The refractive index of the obtained infrared optical glass is 2.42, and the difference ΔT between the crystallization temperature and the transition temperature is about 150°C. The infrared transmittance is shown in Figure 3, and its infrared transmission range is from 0.5 μm to 7.2 μm. The schematic diagram of the thermogravimetric test is shown in Figure 4.

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Abstract

The invention discloses an alkali metal lanthanum bismuth gallate infrared optical glass and a preparation method thereof. The main components of the glass are Bi2O3, Ga2O3, La2O3 and R2O. Its preparation method includes (1) mixing the powders of each component evenly, heating to 1000°C-1300°C, and keeping it for 2 to 5 hours; (2) pouring the melt into a mold and cooling it naturally; (3) forming the glass The sample is annealed and kept at a temperature of 300° C. to 400° C. for 20 to 30 hours, and then cooled to room temperature. The obtained glass has wide infrared transmission characteristics, the transmission range can reach 0.5-7μm, good thermal stability, the difference between the crystallization temperature and the transition temperature ΔT can reach 150°C and a large refractive index, according to different components, The refractive index can reach 2.4-2.5. It is used in optical fields such as infrared detection and optical communication.

Description

technical field [0001] The invention relates to the field of glass, in particular to an alkali metal lanthanum bismuth gallate infrared optical glass and a preparation method thereof. Background technique [0002] In recent years, with the development of optical communication, infrared sensing technology and infrared optics, the wide application of optoelectronic devices and the concept of integrated optics, optical glass with wider infrared transmission characteristics and better thermal stability has become a research topic. One of the hot spots. [0003] The transmission wavelength of traditional silica fiber generally does not exceed 2.5 μm, so it is limited in mid-infrared communication and detection. Although the traditional silicon and germanium glass manufacturing processes are relatively mature, their transmission spectral wavelengths are limited in the range of 4.5 μm-5.5 μm. [0004] Tellurite glass has an infrared transmission wavelength up to 5.5 μm, but its c...

Claims

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Application Information

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IPC IPC(8): C03C3/14
Inventor 满石清李洪伟
Owner JINAN UNIVERSITY
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