Neodymium-doped yttrium-fluoride nanocrystalline transparent glass ceramic with high stimulated emission cross section and preparation thereof

A technology of stimulated emission and neodymium yttrium fluoride is applied in the field of neodymium-doped glass ceramics and its preparation technology, which can solve the problems of reducing industrial application value and the like, and achieve the effects of stable structure, low cost and low equipment requirements.

Inactive Publication Date: 2008-07-02
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

However, this type of material has reduced its industrial application value due to the poisonous lead fluoride and cadmium fluoride

Method used

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  • Neodymium-doped yttrium-fluoride nanocrystalline transparent glass ceramic with high stimulated emission cross section and preparation thereof

Examples

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Effect test

example 1

[0010] Example 1: Analytical pure SiO 2 、Al 2 o 3 , LiF, YF 3 and NdF with a purity of 99.99% 3 Powder, according to 2.0NdF 3 : 44SiO 2 : 28Al 2 o 3 :10LiF:16YF 3 (Molar ratio) is accurately weighed and placed in an agate mortar, ground for more than half an hour to make it evenly mixed, then placed in a platinum crucible, heated to 1400°C in a program-controlled high-temperature box-type resistance furnace, and then kept for 1.5 hours , and then, quickly pour the glass melt into a preheated copper mold at 300°C for forming; put the obtained glass into a resistance furnace, anneal at 500°C for 2 hours and then cool with the furnace to eliminate internal stress; the annealed glass After holding at 570° C. for 2 hours, a blue transparent glass-ceramic doped with 2.0% neodymium ions was obtained. Transmission electron microscopy studies have shown that there are a large number of YF with a size of 20-30nm in the glass ceramics 3 The grains are evenly distributed in the ...

example 2

[0011] Example 2: Analytical pure SiO 2 、Al 2 o 3 , LiF, YF 3 and NdF with a purity of 99.99% 3 Powder, according to 1.0NdF 3 : 44SiO 2 : 28Al 2 o 3 :10LiF:17YF 3 The proportioning ratio of (molar ratio) was accurately weighed, and after the same preparation and heat treatment process as in Example 1, a blue transparent glass-ceramic doped with 1.0% neodymium ions was obtained. After the sample is surface polished, the emission spectrum at room temperature is measured with a FLS920 fluorescence spectrometer. After calculation, 1 f 3 / 2 → 1 I 11 / 2 The stimulated emission cross section of the transition is 7.83×10 -20 cm 2 , the luminous quantum efficiency is 78%.

example 3

[0012] Example 3: Analytical pure SiO 2 、Al 2 o 3 , LiF, YF 3 and NdF with a purity of 99.99% 3 Powder, according to 0.1NdF 3 : 44SiO 2 : 28Al 2 o 3 : 10LiF : 17.9YF 3 The proportioning ratio of (molar ratio) was accurately weighed, and after the same preparation and heat treatment process as in Example 1, a light blue transparent glass-ceramic doped with 0.1% neodymium ions was obtained. After the sample is surface polished, the emission spectrum at room temperature is measured with a FLS920 fluorescence spectrometer. After calculation, 4 f 3 / 2 → 4 I 11 / 2 The stimulated emission cross section of the transition reaches 15.53×10 -20 cm 2 , the luminous quantum efficiency reaches 95%.

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Abstract

The invention discloses Nd-doped yttrium fluoride nanocrystalline transparent glass ceramic with high cross sections of stimulated emission and the preparation method thereof, which relates to the field of laser material. The components of glass ceramic are (mole ratio): 44SiO2-28Al 2O3-xYF3-yLiF-zNdF3 (x=13-18, z=0.01-2.0, y= (28-x-z)). The invention is prepared by melt-spinning technique. Corresponding to the transition emission peak of <4>F3/2-< 4>IJ (J=9/2, 11/2, 13/2), the glass ceramic has obvious stark effect. The transition emission peak of <4>F3/2-< 4>I 11/2 can be up to 15.53 multiplied by 10<-20>cm<2>, which is much higher than that of the existing applied Nd-doped laser glass.

Description

technical field [0001] The invention relates to the field of solid laser materials, in particular to a neodymium-doped glass ceramic with a high stimulated emission cross section and a preparation process thereof. Background technique [0002] The commonly used solid-state laser materials are generally crystal or glass. Laser crystals have better spectral performance, but the disadvantages are that the preparation is difficult and the cost is high; compared with laser crystals, glass materials are easy to prepare and low in cost, but due to their wide spectral lines, small emission and absorption cross-sections, and high laser start-up thresholds , generally the output efficiency is low. Glass ceramics are obtained by partial crystallization of the glass phase. By controlling the crystallization so that the grain size is below 30nm and uniformly distributed in the glass matrix, transparent glass ceramics can be obtained. Transparent glass ceramics containing fluoride cryst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03C3/112C03B32/02
Inventor 陈大钦王元生马恩余运龙
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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