Preparation of tellurate series glass with large stimulated emission section and high thermal stability

A high thermal stability, stimulated emission technology, applied in the field of optical materials, can solve the problems of less than ideal thermal stability and chemical stability, less thermal performance and high gain performance of laser glass, poor thermal stability against devitrification, etc. Achieve the effect of low phonon energy, wide fluorescence linewidth, and high thermal stability parameters

Inactive Publication Date: 2012-09-12
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, the unique triangular bipyramidal structure of tellurate glass makes its thermal and chemical stability unsatisfactory, mainly in the aspects of poor thermal stability against devitrification, high glass brittleness, and low mechanical strength.
[0004] At present, the research on tellurate laser glass mainly focuses on the binary and ternary systems, but there are few reports on the factors affecting the thermal properties and high-gain performance of multi-component systems, laser glass. Therefore, research

Method used

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  • Preparation of tellurate series glass with large stimulated emission section and high thermal stability
  • Preparation of tellurate series glass with large stimulated emission section and high thermal stability
  • Preparation of tellurate series glass with large stimulated emission section and high thermal stability

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Effect test

preparation example Construction

[0042] The preparation method of the above-mentioned tellurite-based glass includes the following process:

[0043] Use an alumina crucible to feed materials at 750°C-820°C, among which 800°C is the best; then, raise the temperature to 900°C-950°C to form the material; after the material is melted, stir once with a quartz rod to make the glass liquid uniform; after 20 minutes, the second Secondary stirring; heat preservation at 900°C-950°C for 10 minutes and release from the oven. Pour the molten glass on the preheated copper mold, and quickly move it into the annealing furnace after forming, and perform precision annealing at the glass transition temperature, the annealing rate is 2°C / min-3°C / min, until it cools to room temperature.

Embodiment 1

[0045] The composition of the glass is: TeO 2 : 66 mol%, Nb 2 o 5 : 10 mol%, ZnO: 18 mol%, PbF 2 : 2 mol%, ZrF 4 : 3mol%, Yb 2 o 3 : 1 mol%, and the purity of the raw materials is 4N and above. Accurately calculate, weigh and shake according to the formula.

[0046] In the experiment, alumina crucible was used to feed materials at 750°C; then, the temperature was raised to 900°C to form the materials; after 15 minutes, the materials were stirred once with a quartz rod to make the glass liquid uniform; after 20 minutes, the second stirring was carried out; , out of the oven. Pour the molten glass onto the preheated copper mold, move it into the annealing furnace quickly after forming, and anneal at the glass transition temperature for 6 hours, then cool naturally to room temperature.

[0047] The DSC curve of the sample prepared by embodiment 1 is shown in figure 1 , its glass transition temperature is 406 (± 5 ℃) ℃, the crystallization start temperature is 592 ℃, and...

Embodiment 2

[0049] The composition of the glass is: TeO 2 : 66 mol%, Nb 2 o 5 : 10 mol%, ZnO: 14 mol%, PbF 2 : 6 mol%, ZrF 4 : 3mol%, Yb 2 o 3 : 1 mol%, and the purity of the raw materials is 4N and above. Accurately calculate, weigh and shake according to the formula.

[0050] In the experiment, alumina crucible was used to feed materials at 750°C; then, the temperature was raised to about 900°C to form the materials; after 10 minutes, the materials were stirred once with a quartz rod to make the glass liquid uniform; after 15 minutes, the second stirring was carried out; , out of the oven. Pour the molten glass onto the preheated copper mold, move it into the annealing furnace quickly after forming, and anneal at the glass transition temperature for 6 hours, then cool naturally to room temperature.

[0051] The absorption cross section and the stimulated emission cross section diagram of the sample prepared in embodiment 2 are shown in figure 2 shown. The glass has a subpeak ...

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Abstract

The invention relates to design and preparation of an ytterbium-doped tellurate series glass material with large stimulated emission section and high thermal stability. Based on the total amount of the ytterbium-doped tellurate series glass, the glass comprises the following components: 50 to 70 mole percent of TeO2, 5 to 15 mole percent of Nb2O5, 5 to 20 mole percent of ZnO, 2 to 6 mole percent of PbF2, 5 to 15 mole percent of PbO, 1 to 6 mole percent of ZrF4, and 0.1 to 10 mole percent of Yb2O3. The preparation method is the conventional melting method. By co-doping Pb<2+> and Zr<4+> ions and regulating the doping content of the double ions, the obtained ytterbium-doped tellurate series glass is excellent in glass forming performance and high in thermal stability, and has a large stimulated emission section (1.48pm<2>). The preparation technology for the ytterbium-doped tellurate series glass is simple, easy to operate, short in period and high in efficiency, and is suitable for large-scale production; and the ytterbium-doped tellurate series glass can be applied in the field of high technologies such as national defense and communications.

Description

technical field [0001] The invention belongs to the field of optical materials, and relates to infrared transmission materials, infrared luminescent materials, high-gain laser materials, etc., in particular to a tellurate-based glass material doped with ytterbium ions and a preparation method thereof. The glass has a large stimulated emission cross-section and high thermal stability parameters, making it an ideal material for high-power lasers and amplifiers. technical background [0002] As the development of lasers gradually tends to high energy, high power, short pulse and integration, solid-state laser materials are required to have a large gain coefficient and good thermal stability. In laser glass, the active ions as high gain medium mainly include Nd 3+ and Yb 3+ and other rare earth ions. Recent studies have shown that many properties of ytterbium-doped laser glass are better than that of neodymium-doped laser glass. with Nd 3+ ion compared to Yb 3+ The ion has...

Claims

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Application Information

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IPC IPC(8): C03C3/23
Inventor 彭波韦玮王翠翠王鹏飞
Owner NANJING UNIV OF POSTS & TELECOMM
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