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High-ultraviolet-transmittance fluorphosphate glass and preparation method thereof

A fluorophosphate glass, transmittance technology, applied in the field of high ultraviolet transmittance glass, can solve the problems of complex preparation process, high melting temperature, narrow transmittance range, etc., achieve high ultraviolet transmittance, crystallization The effect of small tendency and large transmission range

Inactive Publication Date: 2014-01-22
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The commonly used UV-transmitting glass material is quartz glass. Its preparation process is relatively mature, but its transmission range is narrow, and its transmission ability in the infrared band is poor. At the same time, the melting temperature is high and the preparation process is relatively complicated.

Method used

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  • High-ultraviolet-transmittance fluorphosphate glass and preparation method thereof
  • High-ultraviolet-transmittance fluorphosphate glass and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Composition by molar percentage, P 2 o 5 : 17 mol%, AlF 3 : 30 mol%, CaF 2 : 30 mol%, NaF: 12 mol%, BaF 2 : 10 mol%, La 2 o 3 : 1 mol%, the sum of the above components is 100 mol% for batching.

[0025] The preparation method is as follows: Weigh the raw material according to the formula, mix it well and add it into the corundum crucible; heat it up to 1000-1100 degrees in the silicon carbide rod furnace and keep it for 30-40 minutes; temperature in a muffle furnace for 3 hours, and then annealed to room temperature at a cooling rate of 10°C per hour. After the annealed sample is ground and processed, the performance analysis is carried out, and the test results are shown in figure 1 , figure 2 .

Embodiment 2

[0027] Composition by molar percentage, P 2 o 5 : 20 mol%, AlF 3 : 28 mol%, CaF 2 : 30 mol%, NaF: 13 mol%, BaF 2 : 8 mol%, La 2 o 3 : 1 mol%, the sum of the above components is 100 mol% for batching.

[0028] The preparation method is as follows: Weigh the raw material according to the formula, mix it well and add it into the corundum crucible; raise the temperature to 1000-1100 degrees in the silicon carbide rod furnace and keep it for 30-40 minutes, and use argon gas plus carbon tetrachloride to heat the glass liquid. Soak for water removal treatment; cool down, take out the glass and place it in a muffle furnace heated to its glass transition temperature for 3 hours, and then anneal to room temperature at a cooling rate of 10°C per hour. After the annealed sample is ground and processed, the performance analysis is carried out, and the test results are shown in figure 1 , figure 2 .

Embodiment 3

[0030] Composition by molar percentage, P 2 o 5 : 17 mol%, AlF 3 : 30 mol%, CaF 2 : 28 mol%, NaF: 14 mol%, BaF 2 : 10 mol%, La 2 o 3 : 1 mol%, the sum of the above components is 100 mol% for batching.

[0031] The preparation method is as follows: Weigh the raw material according to the formula, mix well and add it into a glassy carbon crucible, place the crucible in a quartz cover and pass it on for protection with argon; heat it up to 1000-1100 degrees in a high-frequency furnace and keep it warm for 30-40 minutes; cool down , take out the glass and place it in a muffle furnace heated to its glass transition temperature for 3 hours, and then anneal it to room temperature at a cooling rate of 10°C per hour. After the annealed sample is ground and processed, the performance analysis is carried out, and the test results are shown in figure 1 , figure 2 .

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Abstract

The invention discloses high-ultraviolet-transmittance fluorphosphate glass and a preparation method thereof. The high-ultraviolet-transmittance fluorphosphate glass comprises components in percentage by mole as follows: 15 mol%-20 mol% of P2O5, 25 mol%-30 mol% of AlF, 25 mol%-35 mol% of CaF, 10 mol%-20 mol% of NaF, 8 mol%-15 mol% of BaF2 and 0.5 mol%-1.5 mol% of La2O3, and the sum of the percentages of the components is 100 mol%. The preparation method comprises steps as follows: raw materials are weighed according to a formula and placed into a crucible after uniformly mixed; the materials are placed in a high frequency furnace or a silicon carbide rod furnace and heated to 1,000 DEG C-1,100 DEG C for heat preservation for 30-40 minutes, and dehydration treatment is performed on a glass liquid simultaneously; and the cooling is performed, glass is taken out and placed in a muffle furnace heated to the glass transition temperature for heat preservation for 3 hours, and the glass is tempered to the room temperature at the cooling speed of 10 DEG C per hour. The glass has good ultraviolet transmittance performance, and the ultraviolet cutoff wavelength is 245 nm (T=80%).

Description

[0001] technical field [0002] The invention relates to high ultraviolet transmittance glass, in particular to a high ultraviolet transmittance fluorophosphate glass and a preparation method thereof. [0003] Background technique [0004] The ozone layer in the atmosphere strongly absorbs ultraviolet light with a wavelength of 200-280nm, so this band is called the "solar blind zone". In the "solar blind zone", the ultraviolet radiation of some military targets appears, such as the launched missiles, which are easily detected by ultraviolet detectors. One of the most important characteristics of a UV detector is its absolute spectral sensitivity. At present, the ideal material for the input window of the detector is UV-transparent glass. Its preparation technology is very difficult and has only been mastered by a few developed countries. [0005] The commonly used UV-transmitting glass material is quartz glass. Its preparation process is relatively mature, but its transmis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/247C03C4/00
Inventor 郑锐林韦玮彭波王东东
Owner NANJING UNIV OF POSTS & TELECOMM
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