Fluorescent glass ceramic material and light-emitting device containing same

A technology of ceramic materials and fluorescent glass, which is applied in the direction of luminescent materials, chemical instruments and methods, semiconductor devices, etc., can solve the problems of low luminous efficiency and poor stability, and achieve high luminous efficiency, high stability, excellent thermal stability and The effect of weather resistance

Active Publication Date: 2019-10-11
GRIREM ADVANCED MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the problems existing in the prior art, in order to meet the requirements of the excitation source for fluorescent materials under high energy density excitation, the purpose of the present invention is to provide a fluorescent material that can be efficiently excited by ultraviolet, near ultraviolet, and blue light, and whose main emission peak is located at 520-550nm. The fluorescent glass-ceramic material and the light-emitting device containing the fluorescent glass-ceramic material solve the problems of poor stability and low luminous efficiency of the existing fluorescent glass-ceramic material and light-emitting device

Method used

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  • Fluorescent glass ceramic material and light-emitting device containing same
  • Fluorescent glass ceramic material and light-emitting device containing same
  • Fluorescent glass ceramic material and light-emitting device containing same

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preparation example Construction

[0029] The preparation method of the fluorescent glass-ceramic material described in the present invention can be prepared by existing conventional methods. In the embodiment of the present invention, the various raw materials required for the above-mentioned fluorescent glass-ceramic material are uniformly mixed, and then pressed into tablets and calcined. , the calcination environment can be air or nitrogen, hydrogen, CO gas protected furnace body, according to a certain program, heat up at the highest temperature for 0.5-10 hours, then take it out after cooling, and carry out grinding, pickling, polishing, cutting, etc. post-processing steps within.

[0030] In yet another typical embodiment of the present invention, a light-emitting device is provided, including a light source and a fluorescent glass-ceramic material, the fluorescent glass-ceramic material is the above-mentioned fluorescent glass-ceramic material, and the light source includes a laser, a high-power LED, an ...

Embodiment 1-5

[0033] According to the type and quality of the glass-ceramic material and phosphor powder shown in Table 1-1 below, the glass-ceramic material and phosphor powder are mixed to form a mixture. Then the mixture is compressed into a tablet machine, placed in a high-temperature furnace for high-temperature treatment in an air atmosphere, and after cooling down, the sheet-shaped fluorescent glass-ceramic material is ground and polished to a desired thickness.

[0034] Fluorescence spectrum analysis is carried out to the fluorescent glass-ceramic material that embodiment 1 makes, as figure 1 As shown, it shows that the obtained fluorescent glass-ceramic material is different from the general commercial La 3 Si 6 N 11 :Ce fluorescence spectrum is roughly the same.

[0035] The thermal stability of the fluorescent glass-ceramic materials in Examples 1-5 above was tested, and the ratios of the luminous intensity at 150°C and 300°C to the luminous intensity at room temperature are s...

Embodiment 6-10

[0042] According to the composition and quality of the glass ceramic material and phosphor powder shown in Table 2-1 below, the glass ceramic material and phosphor powder are mixed to form a mixture. Then the mixture was compressed into a tablet machine, placed in a high-temperature furnace for high-temperature treatment in an air atmosphere, and after cooling down, the sheet-shaped fluorescent glass-ceramic material was ground and polished to the required thickness, and its thermal stability and transmission CIE were also tested. The results are shown in Table 2-2. and general commercial La 3 Si 6 N 11 : Compared with the thermal stability of Ce (91.1% at 150°C and 65.8% at 300°C), it has higher thermal stability.

[0043] table 2-1

[0044]

[0045] Table 2-2

[0046]

[0047] In summary, the fluorescent glass-ceramic material of the present invention has excellent luminescence performance and temperature characteristics, and can obtain continuous and stable spect...

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Abstract

Disclosed are a fluorescent glass ceramic material and a light-emitting device containing the same. The fluorescent glass ceramic material is composed of glass ceramic materials and fluorescent powder, wherein the glass ceramic materials are SiO2, Al2O3, B2O3 and alkali metal oxides (Na2O and K2O) or divalent metal oxides (CaO, SrO, BaO and ZnO); the fluorescent powder has a molecular formula of LnMRbNyCez, wherein Ln is one or two from La, Lu, Gd and Y, R is one or two from Si and G, 2<=m<=4, 5<=b<=7, 10.5<=y<=11.5, and 0<z<=0.5. The fluorescent glass ceramic material can be excited efficiently by ultraviolet light, near ultraviolet light and blue light, and the main emitting peak of the fluorescent glass ceramic material is positioned at 520-550 nm. The fluorescent glass ceramic materialcan not only avoid the problems of degradation and yellowing caused by traditional fluorescent powder packaging manners, but also further improve the thermal stability of existing fluorescent glass ceramic materials; the light-emitting device containing the fluorescent glass ceramic material can be widely applied to the field of high-density energy excitation lighting and display.

Description

technical field [0001] The invention relates to the technical field of fluorescent glass ceramic materials, in particular to a fluorescent glass ceramic material and a light-emitting device containing the material. Background technique [0002] Semiconductor lighting is regarded as the most promising lighting technology, and its industry is developing rapidly. With the progress and development of semiconductor technology, the manufacturing technology of high-power blue light chips with a power of 5W is relatively mature and has been widely used in the market, further promoting It has hindered the development of semiconductor lighting and brought new opportunities and challenges. Semiconductor laser is considered to be the most promising high-quality light source for high-end lighting and display after LED. Fluorescent conversion laser display technology has been applied in large-size display fields such as laser TV, laser projection, and laser theater. Compared with the exi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C4/12C03C10/00C09K11/77H01L33/50
CPCC03C4/12C03C10/0018C03C10/0036C09K11/7766H01L33/504
Inventor 刘荣辉刘元红高慰于海泉
Owner GRIREM ADVANCED MATERIALS CO LTD
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