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Infrared permeating oxide fluoride glass

An oxyfluoride and infrared-transmitting technology, applied in the field of chemical composition of fluoroaluminate glass, can solve the problems such as the lack of fundamental improvement in the anti-devitrification performance of glass, difficulty in obtaining thick fluoroaluminate glass, etc., and achieve good chemical composition. Stability, good glass-forming properties, good glass-forming properties

Inactive Publication Date: 2006-09-06
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Yasui et al. studied a variety of oxide pairs to form 55AlF 3 -35CaF 2 -10BaF 2 Influence of the glass-forming properties of fluoroaluminate glasses, considered TeO 2 The introduction of fluoroaluminate glass helps to improve the anti-devitrification performance of fluoroaluminate glass (see J.Non-Cryst.Solid, 1992, 140:130-133), but the anti-devitrification performance of the glass given in the above-mentioned documents is still not be fundamentally improved
It is difficult to obtain large-size fluoroaluminate glass with a thickness greater than 1cm

Method used

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  • Infrared permeating oxide fluoride glass
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  • Infrared permeating oxide fluoride glass

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Embodiment Construction

[0018] figure 1 Respectively, the differential thermal ("DTA") heating and cooling curves of pure fluoroaluminum glass (AF) and glass obtained in the present invention (AFT). 1-1 is AF heating curve; 1-2 is AF cooling curve; 2-1 is AFT heating curve; 2-2 is AFT cooling curve. Comparing 1-2 and 2-2, it can be seen that the pure fluorine-aluminum glass has obvious crystallization peaks in the process of heating up and cooling down of the melt. However, the crystallization peak of the glass obtained in the present invention becomes flat during the heating process, and there is no obvious crystallization peak in the melt cooling process, which shows that the glass composition of the present invention has better glass-forming properties and is suitable for making large-scale materials. .

[0019] figure 2 It is the transmittance curve of the large-size glass obtained in the present invention in the near-ultraviolet to mid-infrared band, and the thickness of the sample is...

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Abstract

The present invention relates to an infrared transmitting oxyfluoride glass. It is characterized by that in the AlF3-MeF2-MF3 fluoride glass composition the TeO2 or tellurite is added, the range of the composition is as follows: (component, mol%) TeO2 3-50, AlF3 20-55, MgF2+CaF2+SrF2+BaF2 25-60, LaF3+YbF3+YF3 0-40. Said glass composition has good glass-forming property, and is suitable for large size material, and has good transmittance of near ultraviolet and middle infrared wave band.

Description

Technical field: [0001] The invention relates to an infrared-transmitting oxyfluoride glass, which is a chemical composition of a fluoroaluminate glass containing tellurium dioxide (or tellurate). It is characterized by high transmission in the near-ultraviolet to mid-infrared band, and high resistance to devitrification, and can be made into large-sized optical materials. Background technique: [0002] Fluoroaluminate glass is one of the traditional fluoride glasses. It has high transmission in the 0.3-5 μm band, and also has a series of excellent physical and chemical properties such as low refraction, low dispersion, and high chemical stability. However, this kind of fluoride glass is easy to crystallize, and it is not easy to obtain large-sized materials, which limits the scope of its practical application. In 1985, Hu and Fang obtained MgF with better glass-forming properties. 2 -SrF 2 -CaF 2 -BaF 2 -YF 3 -AlF 3 Systematic multicomponent fluoroaluminate glasses (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/23C03C4/10C03C4/00
CPCC03C4/0085C03C3/23C03C4/10
Inventor 胡和方袁新强范有余
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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