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A kind of fluoride glass and preparation method thereof

A fluoride and glass technology, used in glass manufacturing equipment, glass molding, manufacturing tools and other directions, can solve the problems of difficult and efficient preparation of fluoride glass, low chemical stability, high theoretical loss, and achieve good chemical stability, Improved transmittance and low theoretical loss

Active Publication Date: 2020-07-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a fluoride glass and its preparation method, thereby solving the technical problems of low chemical stability, high theoretical loss and high cost of the existing fluoride glass, And it solves the technical problem that the existing fluoride glass preparation method is difficult to economically and efficiently prepare high transmittance fluoride glass

Method used

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  • A kind of fluoride glass and preparation method thereof
  • A kind of fluoride glass and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] The molar percentage of the glass raw materials are 16% ZrF 4 , 24% BaF 2 , 16% NaF, 2% LiF, 10% ZnF 2 , 2% MgF 2 , 2%CaF 2 , 24%AlF 3 and 4% LaF 3 , according to the proportion of 20% of the total mass of glass raw materials, add auxiliary reagent NH 4 HF 2 , before the auxiliary reagent is added to the raw material, it needs to be heated for 10 minutes at a temperature of 200°C. After cooling, put it into the raw material, and then rise to 320°C. 4 HF 2 Thermal decomposition produces hydrogen fluoride and ammonia atmosphere, which is maintained for 40 minutes; then, the fluorinated atmosphere is maintained, and the temperature is raised to 850°C for 40 minutes to complete the melting process. Place the mold in a muffle furnace at 100°C and preheat it separately for 30 minutes to heat the mold fully and evenly; after the raw materials are completely melted, quickly pour the molten glass into the mold, return to the furnace, heat at 100°C for 100 minutes, then s...

Embodiment 2

[0029] The molar percentage of glass raw materials are 70% ZrF 4 , 20% BaF 2 , 5% NaF and 5% AlF 3 , according to the proportion of 30% of the total mass of glass raw materials, add auxiliary reagent NH 4 HF 2 , before the auxiliary reagent is added to the raw material, it needs to be heated for 20 minutes, the temperature is 180 ° C, put it into the raw material after cooling, and then rise to 350 ° C, during this process 4 HF 2 Thermal decomposition produces hydrogen fluoride and ammonia atmosphere, which is maintained for 30 minutes; then, the fluorinated atmosphere is maintained, and the temperature is raised to 950°C for 30 minutes to complete the melting process. Place the mold in a muffle furnace at 150°C and preheat it separately for 20 minutes to fully and evenly heat the mold; after the raw materials are completely melted, quickly pour the molten glass into the mold, return to the furnace, and stop heating after heating at 150°C for 80 minutes to allow The mold ...

Embodiment 3

[0031] The molar percentage of the glass raw material is 58% ZrF 4 , 32% BaF 2 , 5% NaF and 5% LiF, add the auxiliary reagent NH according to the proportion of 40% of the total mass of glass raw materials 4 HF 2 , before the auxiliary reagent is added to the raw material, it needs to be heated for 40 minutes at a temperature of 100°C. 4 HF 2 Thermal decomposition produces hydrogen fluoride and ammonia atmosphere, which is maintained for 20 minutes; then, the fluorinated atmosphere is maintained, and the temperature is raised to 1200 ° C for 20 minutes to complete the melting process. Place the mold in a muffle furnace at 250°C, and preheat it separately for 10 minutes to heat the mold fully and evenly; after the raw materials are completely melted, quickly pour the molten glass into the mold, return to the furnace, heat at 250°C for 30 minutes, then stop heating, let The mold and molten glass are naturally cooled to room temperature. The transmittance of the obtained fluo...

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Abstract

Fluoride glass and a preparing method thereof are disclosed. The fluoride glass includes, in mole percentages, 16-70% of ZrF4, 13-32% of BaF2, 5-18% of MF, 0-14% of MeF2 and 0-28% of MfF3, wherein the M is one or two selected from Na and Li, the Me is one or more selected from Zn, Mg and Ca, and the Mf is one or two selected from Al and La. The fluoride glass has a low cost and is suitable for applications in optical windows of near ultraviolet to middle-infrared wavebands. The cutoff wavelength of the prepared glass is greater than 6 [mu]m. The glass has good glass forming capacity, and is suitable for preparing matrix glass of infrared laser fibers and fiber optic amplifiers and other optical materials. The glass has good glass forming capacity, good chemical stability, and low theoretical loss and is suitable for preparing matrixes of low-loss fluoride fibers and doped fibers.

Description

technical field [0001] The invention belongs to the field of glass, and more specifically relates to a fluoride glass and a preparation method thereof. Background technique [0002] Glass optical fiber with fluoride as the main material has a wider spectral range (0.2-7um) and better mid-infrared optical transmittance than traditional optical fibers, which means that it can be obtained in optical fiber communication systems Larger bandwidth; in addition, fluoride glass has low refractive index, high Abbe number and low nonlinear refractive index, which is an ideal light window material and ultra-low loss infrared optical fiber material, and has great application value. The optical fiber drawn from such fluoride glass can carry a larger optical bandwidth. At the same time, due to its extremely low theoretical loss limit (0.001dB / km), it is widely used in long-distance optical fiber communication, especially in transoceanic communication. application prospects. In addition, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/32C03B19/02C03B25/02C03B37/012
CPCC03B19/02C03B25/02C03B37/012C03B2201/82C03C3/325
Inventor 罗寿超王双保王宇杰
Owner HUAZHONG UNIV OF SCI & TECH
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