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Microcrystalline glass for precipitating La2O3 nano-crystalline and preparation method thereof

A technology of glass-ceramics and nano-crystals, which is applied in the field of glass-ceramics and its preparation, can solve the problems of poor chemical stability and mechanical strength, high phonon energy of the glass matrix, and reduced luminous efficiency, and achieve low production costs and high luminous efficiency. Effects of intensity enhancement and high fluorescence lifetime

Inactive Publication Date: 2008-09-17
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest advantage of fluoride glass is that its glass matrix phonon energy and melting point are very low, but its chemical stability and mechanical strength are poor; the biggest advantage of oxide glass is that the glass matrix has stable physical and chemical properties and high mechanical strength. The disadvantage is that its glass The host phonon energy is high, so that the luminous efficiency is reduced or even impossible to obtain; the crystal also has low phonon energy, which can reduce the probability of non-radiative transition of doped luminescent ions, and improve its quantum efficiency and luminous efficiency

Method used

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  • Microcrystalline glass for precipitating La2O3 nano-crystalline and preparation method thereof
  • Microcrystalline glass for precipitating La2O3 nano-crystalline and preparation method thereof
  • Microcrystalline glass for precipitating La2O3 nano-crystalline and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Table 1 is the glass-ceramic formula and crystallization temperature value of embodiment 1.

[0027] Table 1

[0028]

[0029] Concrete preparation process is as follows:

[0030] In the first step, weigh each component according to the formula in Table 1, mix the above components evenly and pour them into a quartz crucible for melting at a melting temperature of 1400°C, keep the temperature for 2 hours, pour the glass melt into a cast iron mold, Then place it in a muffle furnace for annealing, keep it at the glass transition temperature for 1 hour, turn off the power of the muffle furnace and cool it down to room temperature naturally, and take out the glass;

[0031] In the second step, according to the thermal analysis (DTA) experimental data of glass (see figure 1 ) to obtain the second crystallization temperature Tx 2 It is 710°C. The prepared glass was placed in a muffle furnace for heat treatment at 710°C for 2 hours, and then the power of th...

Embodiment 2

[0034] Embodiment 2: Table 2 is the glass-ceramic formula and crystallization temperature value of embodiment 2.

[0035] Table 2

[0036]

[0037] Concrete preparation process is as follows:

[0038] In the first step, weigh each component according to the formula in Table 2, mix the above components evenly and pour them into a quartz crucible to melt at a melting temperature of 1400°C, keep it warm for 1 hour, pour the glass melt into a cast iron mold, Then place it in a muffle furnace for annealing, keep it at the glass transition temperature for 1 hour, turn off the power of the muffle furnace and cool it down to room temperature naturally, and take out the glass;

[0039] The second step is to obtain the second crystallization temperature Tx according to the thermal analysis (DTA) experimental data of the glass 2 It is 720°C. The prepared glass was placed in a muffle furnace for heat treatment at 720°C for 1 hour, and then the power of the muffle furnace was turned ...

Embodiment 4

[0047] Embodiment 4: Table 4 is the glass-ceramic formula and crystallization temperature value of embodiment 4.

[0048] Table 4

[0049]

[0050] Concrete preparation process is as follows:

[0051] In the first step, weigh each component according to the formula in Table 4, mix the above components evenly and pour them into a quartz crucible to melt at a melting temperature of 1500°C, keep it warm for 1 hour, pour the glass melt into a cast iron mold, Then place it in a muffle furnace for annealing, keep it at the glass transition temperature for 1 hour, turn off the power of the muffle furnace and cool it down to room temperature naturally, and take out the glass;

[0052] In the second step, according to the glass thermal analysis (DTA) experimental data, the second crystallization temperature is 770°C. The prepared glass was heat-treated in a muffle furnace at 770°C for 6 hours, and then the power of the muffle furnace was turned off to cool down to room temperature...

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Abstract

The invention relates to a micro-crystal glass capable of precipitating La2O3 nanometer crystal, particularly to a La2O3 micro-crystal glass doped with rare earth ions or transition metal ions. The micro-crystal glass comprises (mol %) SiO2 45, Al2O3 25, Na2O or Na2CO3 15-20, LaF3 7-12, rare earth ions including ErF3 0.1-7.9 and YbF3 0.1-7.9, and transition metal ions including NiO 0.05-2. The preparation method comprises the steps of preparing SiO2-Al2O3-Na2O-LaF3 glass doped with rare earth ions or transition metal ions by fusion method, and performing heat treatment to obtain micro-crystal glass. The inventive micro-crystal glass has the advantages of low production cost, good transparency, and good physicochemical properties; and can realize effective upconversion luminescence and near-infrared wideband light amplification, and can be used in the fields of laser, optical fiber amplifier and three-dimensional display.

Description

technical field [0001] The invention relates to a glass-ceramic in which La2O3 nanocrystals are precipitated in oxyfluoride glass and a preparation method thereof. Background technique [0002] Up-conversion luminescence, also known as frequency up-conversion luminescence, is a radiative transition process generated by the absorption of multiple photons, and the radiated photon energy is usually higher than that of the pump photon. According to the mechanism of up-conversion luminescence, in order to have a strong up-conversion process, in addition to better ion energy level matching, it is also required that the intermediate energy level of the up-conversion rare earth ions has a longer lifetime, so that under the action of pump light Make this energy level have a larger ion aggregation number. The smaller the phonon energy of the glass matrix, the lower the probability of non-radiative transition of excited state ions, and the longer the excited state lifetime of rare ear...

Claims

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Application Information

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IPC IPC(8): C03C10/02C03C3/11
Inventor 徐时清邓德刚赵士龙鞠海东王焕平王宝玲
Owner CHINA JILIANG UNIV
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