Infrared transparent fluozirconate microcrystalline glass and preparation method thereof

A fluorozirconate, glass-ceramic technology, used in glass manufacturing equipment, glass furnace equipment, manufacturing tools, etc., can solve the problem of not making great progress, low chemical stability and mechanical properties of fluoride glass, hindering optical applications and other problems, to achieve the effect of good transmittance, good mechanical properties and good anti-devitrification properties

A fluorozirconate, glass-ceramic technology, used in glass manufacturing equipment, glass furnace equipment, manufacturing tools, etc., can solve the problem of not making great progress, low chemical stability and mechanical properties of fluoride glass, hindering optical applications and other problems, to achieve the effect of good transmittance, good mechanical properties and good anti-devitrification properties

CN1927752AInactive Publication Date: 2007-03-14SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Infrared transparent fluozirconate microcrystalline glass and preparation method thereof
  • Infrared transparent fluozirconate microcrystalline glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and 2

[0026] Embodiments 1 and 2 are only different in glass formula composition, but the glass melting process is the same. The specific process from glass melting to heat treatment microcrystallization is as follows:

[0027] (1) Melting of fluorozirconate glass: Weigh the raw materials according to the glass formula in Table 1, mix the powdered raw materials evenly, put them in a platinum crucible and melt them in a silicon carbide rod electric furnace at 1000-1050 °C, completely After being melted and clarified for 15-20 minutes, the molten glass is poured on a preheated graphite mold, and then the glass is quickly moved into a muffle furnace heated to 310°C for annealing. The annealing process is: keep warm at 310°C for 3 to 4 hours, then drop to 200°C at a rate of 3°C / hour, and finally drop to room temperature at a rate of 5°C / hour, and take out the glass sample after complete cooling.

[0028] (2) Preparation method of fluorozirconate glass-ceramics: According to glass therm...

Embodiment

[0029] Examples: 3, 4 and 5:

[0030] Concrete preparation process is as follows:

[0031] The first step: carry out batching according to the glass component of embodiment 3,4 and 5 described in table 1; The process is essentially the same, with a slight increase in the temperature at which the glass is melted and the temperature at which the glass is annealed.

[0032] Second step: the preparation process of embodiment 3, 4 and 5 fluoride glass-ceramics is basically the same as that of embodiment 1 and 2, that is, according to the glass thermal analysis (DTA) data, the glass sample made is changed from room temperature to 10 °C / min rate of heating above T g After nucleation at a temperature above 20°C for 4 to 5 hours, heat to the first crystallization peak temperature at a rate of 0.5°C / min (T x ) in the vicinity of crystallization for 30 to 50 minutes, and finally cooled to room temperature at a rate of 1° C. / min and then taken out to obtain transparent fluorozirconate ...

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Abstract

The present invention is infrared transmitting fluorozirconate microcrystal glass and its preparation process, and features that LaF3 is added into ZrF4-BaF2-YF3-AlF3 fluoride glass components to form the fluorozirconate microcrystal glass in the molar composition of: ZrF4 50-55 mol%, BaF2 15-33 mol%, YF3 10-22 mol%, AlF3 3-7 mol%, and LaF3 2-8 mol%. The preparation process includes the first smelting process to prepare fluorozirconate glass and the subsequent precise heat treatment to microcrystallize the base glass into infrared transmitting fluorozirconate microcrystal glass. The preparation process is simple, and the prepared fluorozirconate microcrystal glass has excellent resistance to transparency loss and higher mechanical performance than fluoride glass. The fluorozirconate microcrystal glass is suitable for use as the optical window material in medium infrared band.

Description

technical field [0001] The present invention relates to fluorozirconate glass-ceramics, especially a kind of infrared-transmitting fluoro-zirconate glass-ceramics and its preparation method. Compared with fluoride glass, its mechanical strength is greatly enhanced. Background technique [0002] In the past few decades, a great deal of research has been done on how to form uniform submicroscale crystal phases in silica-based glasses. Compared with traditional glass, glass-ceramic has excellent thermal and mechanical properties, such as low thermal expansion coefficient and high elastic modulus, especially when the crystallite phase size in glass-ceramic is smaller than a certain wave band, it has a high Through the characteristics, the thermal and mechanical properties of the glass are greatly improved. [0003] Fluoride glass has a small refractive index, low phonon energy, and good infrared transmission performance in the range of 0.2-7 μm, making fluoride glass a popular...

Claims

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Application Information

Patent Timeline
14 Mar 2007
Publication
CN1927752A
IPC
C03C10/02; C03C3/32; C03B5/235; C03B32/02
CPC
C03C4/10; C03C3/325
Inventors
赖杨琼; 张军杰