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Fluorescent glass ceramic and preparation method thereof

A technology of glass and fluorescent powder, which is applied in the chemical industry and can solve problems such as easy melting, complicated process, and low melting point

Pending Publication Date: 2020-10-30
贵州赛义光电科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] People have explored low-melting glass (such as borate glass) to introduce phosphor powder into the glass at a relatively low temperature, but borate glass is easy to absorb water, and has a certain volatility and chemical stability. Poor sex
In contrast, aluminosilicate glass has excellent physical and chemical stability, but the preparation cost of aluminosilicate glass by high-temperature solid-phase method is relatively high, and the process is relatively complicated, which is not suitable for large-scale industrial production; Na 2 CO 3 、K 2 CO 3 The melting point of other components is low, and it is easy to melt during the high-temperature reaction process, which further increases the difficulty of directly preparing aluminosilicate glass by high-temperature solid-phase method

Method used

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  • Fluorescent glass ceramic and preparation method thereof
  • Fluorescent glass ceramic and preparation method thereof
  • Fluorescent glass ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Using YAG:Ce phosphor and LTA molecular sieve as raw materials, weigh 21g of YAG:Ce phosphor and 49g of LTA molecular sieve according to the mass ratio of YAG:Ce:LTA=3:7, and weigh the weighed powder into a 3:1 ball Material ratio is loaded into the ball mill tank, and 95ml of absolute ethanol is added, and ball milled at a speed of 250r / min for 12 hours in a planetary ball mill. After the ball milling, take out the slurry, put it in a drying oven at 100°C for 12 hours, and get the raw material block after messing up, process the raw block into a suitable size, transfer it to a crucible, and put it in a box furnace at 1600°C Atmospheric pressure sintering for 5 hours, sintering LTA zeolite at high temperature, the zeolite skeleton collapses, combined with YAG:Ce phosphor, after natural cooling, 3YAG:Ce / 7LTA PiG material can be obtained.

[0035] The phase of the obtained PiG material is detected by X-ray powder diffractometer, and the detection result data shows that th...

Embodiment 2

[0040] The method of preparing PiG material in Example 2 is basically the same as that in Example 1, the raw materials used are YAG:Ce phosphor and LTA molecular sieve, the difference is that the mass ratio of YAG:Ce phosphor and LTA zeolite is 4:6.

[0041] The phase of the obtained PiG material is detected by X-ray powder diffractometer, and the detection result data shows that the phase of the obtained fluorescent material is a glass phase, and the XRD spectrum is as follows Figure 4 shown.

[0042] Using a fluorescence spectrometer, test the emission spectrum of the PiG material prepared in Example 1 of the present invention under the excitation of 450nm blue light, and the test results are as follows Figure 5 shown.

[0043] Using a scanning electron microscope, the morphology of the obtained PiG material is detected, and the SEM map is as follows Figure 6 shown.

Embodiment 3

[0045] The method for preparing PiG material in Example 3 is basically the same as Example 1. The raw materials used are YAG:Ce phosphor and LTA molecular sieve, the difference is that the mass ratio of YAG:Ce phosphor and LTA zeolite is 5:5.

[0046] The phase of the obtained PiG material is detected by X-ray powder diffractometer, and the detection result data shows that the phase of the obtained fluorescent material is a glass phase, and the XRD spectrum is as follows Figure 7 shown.

[0047] Using a fluorescence spectrometer, test the emission spectrum of the PiG material prepared in Example 1 of the present invention under the excitation of 450nm blue light, and the test results are as follows Figure 8 shown.

[0048] Using a scanning electron microscope, the morphology of the obtained PiG material is detected, and the SEM map is as follows Figure 9 shown.

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Abstract

The invention provides a novel YAG: Ce / LTA fluorescent powder / glass composite material (phosphorin glass, PiG) and a preparation method thereof, the PiG material is mixed according to the mass ratio of YAG: Ce = x LTA, and x is greater than or equal to 0.01 and less than or equal to 100. The preparation method of the PiG material comprises the following steps: mixing YAG: Ce fluorescent powder andthe LTA molecular sieve according to a certain mass ratio; then adding absolute ethyl alcohol, and fully and uniformly mixing through a planetary ball mill; drying an obtained slurry to obtain powder, directly putting the powder into a box-type furnace for sintering, heating the LTA molecular sieve at high temperature to form glass, and uniformly embedding YAG: Ce fluorescent powder into the glass to obtain the YAG: Ce / LTA PiG material. The preparation method disclosed by the invention has the advantages of simple preparation process, low cost, no toxicity in the preparation process and the like, and the PiG material prepared by the preparation method disclosed by the invention has excellent chemical and physical stability, excellent heat resistance, excellent moisture resistance and relatively high luminous efficiency.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a new PiG material and a preparation method thereof, specifically a novel YAG:Ce / LTA PiG material and a preparation method thereof. Background technique [0002] The current mainstream commercial WLEDs are obtained by combining InGaN blue emitting chips with YAG:Ce yellow phosphor encapsulated on the chip surface using silica gel. However, for high-power WLEDs, due to the heat emitted by the chip, the thermal conductivity is low and thermal Silicone with poor stability is easy to age and turn yellow. To address this issue, all-inorganic materials such as glass ceramics and PiG materials have been investigated as substitutes for silica gel. [0003] YAG:Ce glass-ceramics is a composite material containing YAG:Ce crystallites, which has the advantages of good heat resistance and easy molding, but the maximum quantum yield of YAG:Ce glass-ceramics reported so far is about 30 %, and ...

Claims

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Application Information

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IPC IPC(8): C03C10/04C03C14/00C03C4/12C03C6/00C09K11/80
CPCC03C10/00C03C14/00C03C4/12C03C1/00C09K11/7774
Inventor 林辉尹晓蒙蒋顺攀胡健周稷
Owner 贵州赛义光电科技有限公司
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