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Rare earth doped fluorochlorozirconate luminescent glass for white light emitting diode and preparation method thereof

A fluorochlorozirconate and rare earth doping technology, which is applied in the field of rare earth doped fluorochlorozirconate luminescent glass for white light-emitting diodes and its preparation, can solve the problem of complex luminescent energy levels of rare earth ions, different rare earth luminescent properties, Problems such as differences in glass and crystal structures, to achieve high color rendering index, increased luminous intensity, and enhanced luminous intensity

Inactive Publication Date: 2019-01-22
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The advantage of the technical solutions in the above patents is the use of the addition of halide ions Cl - , so that the luminescence of the phosphor is enhanced to a certain extent, but the luminescence energy levels of rare earth ions are complex and the structure of glass and crystal is obviously different, resulting in very different luminescence properties of rare earth in glass and crystal. Patent cases CN 102863962 A and CN The luminescent ion in 101348719 B is Ce 3+ Ions, the ions not only have a very low luminous intensity in fluoride glass, but also have an ultraviolet light wavelength below 350nm
At present, no patents and literatures at home and abroad have been found involving the introduction of Cl - Report on the Effect of Ions on Fluorescent Glasses, Especially Fluorozirconate Fluorescent Glasses in the Visible Range

Method used

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  • Rare earth doped fluorochlorozirconate luminescent glass for white light emitting diode and preparation method thereof
  • Rare earth doped fluorochlorozirconate luminescent glass for white light emitting diode and preparation method thereof
  • Rare earth doped fluorochlorozirconate luminescent glass for white light emitting diode and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The raw material composition is shown in Table 1, and the specific preparation process is as follows:

[0028] Weigh:

[0029]

[0030] Put the weighed raw materials into a corundum mortar and mix evenly to obtain a mixture; put the mixture into a covered platinum crucible and melt it in a silicon carbide rod electric furnace at 930 ° C, and clarify it for 10 minutes after melting completely. Cast on a stainless steel mold preheated at 330°C; quickly transfer the glass to an annealing furnace that has been heated to 330°C for annealing, keep it warm for 6 hours, then lower it to 200°C at a rate of 10°C / h, and then cool to room temperature with the furnace. After complete cooling, the glass sample was taken out to obtain rare earth doped fluorozirconate glass. The emission spectrum of luminescent glass embodiment 1# of the present invention is as follows figure 1 As shown by the dotted line, the luminous intensity of the sample is relatively weak, the color of the s...

Embodiment 2

[0032] The raw material composition is shown in Table 1, and the specific preparation process is as follows:

[0033] Weigh:

[0034]

[0035] Put the weighed raw materials into a corundum mortar and mix evenly to obtain a mixture; put the mixture into a covered platinum crucible and melt it in a silicon carbide rod electric furnace at 930 ° C, and clarify it for 10 minutes after melting completely. Cast on a stainless steel mold preheated at 330°C; quickly transfer the glass to an annealing furnace that has been heated to 330°C for annealing, keep it warm for 6 hours, then lower it to 200°C at a rate of 10°C / h, and then cool to room temperature with the furnace. After complete cooling, the glass sample was taken out to obtain rare earth-doped fluorochlorozirconate glass. The color of the sample was still greenish, and the transmittance could reach about 90%.

Embodiment 3

[0037] The raw material composition is shown in Table 1, and the specific preparation process is as follows:

[0038] Weigh:

[0039]

[0040]Put the weighed raw materials into a corundum mortar and mix evenly to obtain a mixture; put the mixture into a covered platinum crucible and melt it in a silicon carbide rod electric furnace at 930 ° C, and clarify it for 10 minutes after melting completely. Cast on a stainless steel mold preheated at 330°C; quickly transfer the glass to an annealing furnace that has been heated to 330°C for annealing, keep it warm for 6 hours, then lower it to 200°C at a rate of 10°C / h, and then cool to room temperature with the furnace. After complete cooling, the glass sample is taken out to obtain rare earth doped fluorochlorozirconate glass, the color of the sample is yellowish green, and the transmittance can reach about 90%.

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Abstract

A rare earth doped fluorochlorozirconate luminescent glass for a white light emitting diode and a preparation method thereof are disclosed. Chloride ions are introduced into the rare earth doped fluorochlorozirconate luminescent glass by using of BaCl2 for partial substitution of BaF2, and the fluorescence luminescent intensity of t rare earth ions Pr<3+> and Ho<3+> are enhanced. The rare earth doped fluorochlorozirconate luminescent glass comprises the following components in specific mole percentage: 43.5 to 63.5 mol% of ZrF4, 0 to 34 mol% of BaF2, 4 to 14 mol% of YF3, 3 to 9 mol% of AlF3, and 0.5 to 33 mol% of BaCl2, the doping concentrations of rare earth elements is: 0.2 to 3 mol% of PrF3 and 0.1 to 1.5 mol% of HoF3, and the sum of the percentages of the components is 100 mol%. The rare earth doped fluorochlorozirconate luminescent glass is prepared by melting in a covered platinum crucible in a silicon carbon rod electric furnace. The glass has the characteristics of high luminous intensity, adjustable color temperature and low cost.

Description

technical field [0001] The invention relates to a fluorescent glass for a white light emitting diode, in particular to a rare earth-doped fluorochlorozirconate luminescent glass for a white light emitting diode and a preparation method thereof. technical background [0002] Light Emitting Diode (LED for short) is a new type of semiconductor lighting source, which has high photoelectric conversion efficiency, low energy consumption, long life, small size, fast response, high reliability, no radiation, no pollution and The advantages of resistance to various harsh conditions have become a research hotspot in recent years. [0003] At present, the main method of making LED devices on the market is still chip plus phosphor, Ce 3+ :Y 3 Al 5 o 12 It is the most typical yellow phosphor used in white LED light source packaging. However, in the use of high-power LEDs, a part of the energy of the LED chip is converted into heat energy under the drive of electric energy. The accum...

Claims

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Application Information

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IPC IPC(8): C03C3/32C03C4/12
CPCC03C3/325C03C4/12
Inventor 邹雅陈丹平王亚杰张宗辉韩帅
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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