Oxyfluoride glass with low hydroxyl content and preparation method of oxyfluoride glass

A technology of oxyfluoride glass and low hydroxyl group, which is applied in the field of oxyfluoride glass with low hydroxyl group content and its preparation, and can solve the problems of low glass transition temperature, low water resistance and mechanical strength, large hydroxyl group absorption peak, etc.

Inactive Publication Date: 2014-04-16
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fluorozirconate glass has the following disadvantages: low glass transition temperature, low water resistance and low mechanical strength
However, the currently studied AlF 3 -MF 2 The system has a large hydroxyl absorption peak at 2.9 μm

Method used

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  • Oxyfluoride glass with low hydroxyl content and preparation method of oxyfluoride glass
  • Oxyfluoride glass with low hydroxyl content and preparation method of oxyfluoride glass
  • Oxyfluoride glass with low hydroxyl content and preparation method of oxyfluoride glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Composition is as shown in 1# in table 1, and concrete preparation process is as follows:

[0025] According to the molar percentage of the 1# glass composition in Table 1, calculate the weight of the corresponding components, weigh the raw materials and mix them evenly; put the mixture into a platinum crucible and melt it in a silicon carbide rod electric furnace at 900°C to 950°C , clarify for 15 minutes after complete melting, pour the molten glass into a preheated mold; quickly move the glass into a muffle furnace that has been heated to a specific annealing temperature, keep it warm for 4 hours, and then lower it to room temperature at a rate of 10°C / hour , and remove the glass sample after complete cooling.

[0026] The test results for this glass are as follows:

[0027] Take a small sample after annealing, grind it into a fine powder with an agate mortar, and conduct a differential thermal analysis test.

[0028] Process the annealed sample into a glass sheet ...

Embodiment 2

[0030] Composition is as shown in 2# in table 1, and concrete preparation process is as embodiment 1 #

[0031] The test results for this glass are as follows:

[0032] Process the annealed sample into a glass sheet of 10×20×1.0mm and polish it, and test its infrared transmission spectrum. The infrared transmission spectrum of the oxyfluoride glass embodiment 2# of low hydroxyl content of the present invention is as follows figure 1 As shown, the maximum transmittance and 3μm absorption coefficient are as figure 2 shown. Experiments show that the glass has good transparency, no crystallization, a slightly reduced range of mid-infrared light transmission, and a maximum transmittance of 93%. There is a weak hydroxyl absorption peak at 2.9 μm, and the hydroxyl coefficient is small.

Embodiment 3

[0034] Composition is as shown in 3# in table 1, and concrete preparation process is as embodiment 1 #

[0035] The test results for this glass are as follows:

[0036] Process the annealed sample into a glass sheet of 10×20×1.0mm and polish it, and test its infrared transmission spectrum. The infrared transmission spectrum of the oxyfluoride glass embodiment 3# of low hydroxyl content of the present invention is as follows figure 1 As shown, the maximum transmittance and 3μm absorption coefficient are as figure 2 shown. Experiments show that the glass has good transparency, no crystallization, a slightly reduced range of mid-infrared light transmission, and a maximum transmittance of 92%. There is a weak hydroxyl absorption peak at 2.9 μm, and the hydroxyl coefficient is small.

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Abstract

The invention relates to oxyfluoride glass with a low hydroxyl content and a preparation method of the oxyfluoride glass. The oxyfluoride glass is characterized in that heavy metal TeO2 is added into a fluoaluminic acid salt glass system to obviously reduce the hydroxyl content of the fluoaluminic acid salt glass system. The glass particularly comprises the following ingredients by mole fraction: 25-35% of AlF3, 10-15% of YF3, 12-20% of CaF2, 7-10% of SrF2, 7-10% of BaF2, 7-10% of MgF2 and 0-25% of TeO2, wherein the mole fraction sum of the ingredients is 100%. The glass is prepared with a fusion method through a capped platinum crucible and a silicon carbide rod electric furnace. According to the glass, the heavy metal TeO2 is introduced into the fluoaluminic acid salt glass, so that the transparency of the glass gets better; the heat stability is improved; the crystallization resistance of the glass is enhanced; the transmittance rate of a middle infrared region reaches 90%; a hydroxyl absorption peak at 2.9 micrometers becomes very weak; and a hydroxyl absorption coefficient is reduced to 1 / 15 % of the original absorption coefficient.

Description

technical field [0001] The invention relates to oxyfluoride glass, in particular to oxyfluoride glass with low hydroxyl content and a preparation method thereof. Background technique [0002] Compared with the traditional multi-component oxide glass, fluoride glass has the advantages of wide light transmission range in the ultraviolet and mid-infrared bands, low refractive index and large Abel number. In addition, fluoride glass also has lower phonon energy and stronger ionic bond properties. The doping concentration of rare earth ions in fluoride glass can be very high, and the luminescence range of rare earth ions in fluoride glass extends from the visible to the mid-infrared region. Due to these unique properties of fluoride glass, compared with traditional multi-component oxide glass, it has incomparable advantages of traditional materials in some fields. [0003] In recent years, 2-3μm laser materials have been highly valued at home and abroad. The 3μm band laser is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/23C03C3/32
Inventor 黄飞飞陈丹平
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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