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Alkaline-earth contained fluoride nano crystal transparent glass ceramic and its sol-gel preparing method

A technology of alkaline earth fluoride and transparent glass, which is applied in the field of luminescent materials, can solve the problems of uneven distribution of material components, high temperature for preparation conditions, inconvenient research and production, etc., to achieve controllable components, simple preparation process, and uniformity Good results

Inactive Publication Date: 2007-08-29
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method of preparing transparent glass-ceramic materials is the melting and quenching method, and its preparation conditions require high temperature, which brings inconvenience to research and production; in addition, the material components prepared by this method are not evenly distributed, and due to high temperature melting, some raw materials Evaporation, causing the final material composition to deviate from the design value (refer to R.T.Génova et al., J.AlloyComp., 380(2004)167)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0008] Example 1: Mix 0.009mol strontium acetate, 0.001mol erbium acetate, 0.4mol trifluoroacetic acid and 0.03mol deionized water in a beaker and heat to dissolve to obtain a transparent solution (hereinafter referred to as A solution); Ester, 0.36mol absolute ethanol and a small amount of acetic acid were mixed and stirred for half an hour to obtain a clear solution (hereinafter referred to as B solution). After solution A is added dropwise to solution B, add 0.5 mol of deionized water to the mixture, and add acetic acid dropwise to adjust the pH value to 4, cover with plastic wrap and stir for 4 hours to obtain a uniform and transparent sol; Pour it into a weighing bottle, and after aging for two weeks at room temperature, slowly heat it in an oven to 155°C and keep it warm for one week to obtain a transparent xerogel; heat the xerogel in a muffle furnace at a rate of 2K / min to 800°C, and keep it warm for 30 minutes, the component is 90SiO 2 -9SrF 2 -1ErF 3 Transparent g...

example 2

[0009] Example 2: Mix 0.009mol barium acetate, 0.001mol erbium acetate, 0.4mol trifluoroacetic acid and 0.03mol deionized water in a beaker and heat to dissolve to obtain a transparent solution (hereinafter referred to as A solution); Ester, 0.36mol absolute ethanol and a small amount of acetic acid were mixed and stirred for half an hour to obtain a clear solution (hereinafter referred to as B solution). After solution A was added dropwise to solution B, 0.5 mol of deionized water was added to the mixed solution, and acetic acid was added dropwise to adjust the pH value to 4. Cover with plastic wrap and stir for 4 hours to obtain a uniform and transparent sol. After drying and heat treatment process identical with example 1, obtain 90SiO 2 -9BaF 2 -1ErF 3 Transparent glass-ceramic blocks (discs with a diameter of 5 mm and a thickness of 0.5 mm). The transmission electron microscope observation shows that a large number of BaF with a scale of about 10nm is evenly distribute...

example 3

[0010] Example 3: Mix 0.009mol barium acetate, 0.001mol erbium acetate, 0.4mol trifluoroacetic acid and 0.03mol deionized water in a beaker and heat to dissolve to obtain a transparent solution (hereinafter referred to as A solution); Ester, 0.36mol absolute ethanol and a small amount of acetic acid were mixed and stirred for half an hour to obtain a clear solution (hereinafter referred to as B solution). After solution A was added dropwise to solution B, 0.5 mol of deionized water was added to the mixed solution, and acetic acid was added dropwise to adjust the pH value to 4. Cover with plastic wrap and stir for 4 hours to obtain a uniform and transparent sol. After the same drying and heat treatment process as in Example 1, a transparent glass-ceramic (a disc with a diameter of 5 mm and a thickness of 0.5 mm) was obtained. Red and green up-conversion luminescent signals can be observed with FLS920 fluorescence spectrometer.

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Abstract

The invention relates to an alkali soil fluoride contained nanometer crystal transparent glass ceramic and the manufacture method for sol-gel. The chemical constituents are xSiO2-yMF2-zErF3, x=50-95mol%, y=(100-x-z) mol%, z=0-10mol%, and M is alkali metal Ba or Sr. Under excitation of infrared (wavelength at 978nm) and near ultraviolet (wavelength at 378nm), the glass ceramic would emit green light of wavelength at 525nm and 540nm, and red light of wavelength at 660nm.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to rare earth-doped alkaline-earth fluoride-containing nanocrystalline transparent glass ceramics and a sol-gel preparation method thereof. Background technique [0002] Transparent glass ceramics is a composite material in which the glass phase and the crystal phase coexist by controlling the crystallization of the glass phase. Oxyfluoride transparent glass-ceramic combines the superior chemical stability of oxide glass and the advantages of low phonon energy of fluoride crystal, and is a kind of luminescent host material with potential application value. The traditional method of preparing transparent glass-ceramic materials is the melting and quenching method, and its preparation conditions require high temperature, which brings inconvenience to research and production; in addition, the material components prepared by this method are not evenly distributed, and due to high te...

Claims

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Application Information

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IPC IPC(8): C03C10/14
CPCC03C10/00C03C3/112C03C3/062C03C4/12C03C3/076
Inventor 余运龙陈大钦王元生周丽花
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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