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A green light-emitting glass-ceramic for wide color gamut backlight display and preparation method thereof

A technology for backlight display and glass-ceramic, which is applied in the field of wide-color gamut backlight display green light-emitting glass-ceramic and its preparation, which can solve the problems of unstable physical and chemical properties, low color purity, etc. High, highly symmetrical effect of photoluminescence spectrum

Active Publication Date: 2022-03-22
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, the present invention provides a green light-emitting glass-ceramic for wide color gamut backlight display and its preparation method to solve the defects of unstable physical and chemical properties and low color purity of existing fluorescent materials

Method used

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  • A green light-emitting glass-ceramic for wide color gamut backlight display and preparation method thereof
  • A green light-emitting glass-ceramic for wide color gamut backlight display and preparation method thereof
  • A green light-emitting glass-ceramic for wide color gamut backlight display and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: will analyze pure SiO 2 、Al 2 o 3 , La 2 o 3 , ZnO, BaO, B 2 o 3 、TiO 2 、Na 2 CO 3 and MnCO 3 Powder, according to 38SiO 2 :20Al 2 o 3 :15La 2 o 3 :14.98ZnO:3BaO:5B 2 o 3 :2TiO 2 :2Na 2 CO 3 :0.02MnCO 3 The ratio of (molar ratio) is accurately weighed and placed in a ball mill for ball milling. After mixing evenly, place it in a corundum crucible, put it in a resistance furnace and heat it to 1550°C for 2 hours to melt it. Then, take out the glass melt and mix it. Quickly introduce it into a graphite mold for forming, and then put it into a resistance furnace at 780°C for 4 hours to eliminate the internal stress of the glass, so as to obtain a bulk precursor glass. Put the obtained precursor glass into a resistance furnace at 1100°C for 4 hours of isothermal heat treatment to crystallize the emitting part to obtain LaZnAl 11 o 19 :Mn 2+ Crystalline bulk glass-ceramics.

[0048] X-ray diffraction data indicate precipitation of LaMAl ...

Embodiment 2

[0049] Embodiment 2: will analyze pure SiO 2 、Al 2 o 3 , La 2 o 3 , ZnO, MgO, BaO, B 2 o 3 、TiO 2 、Na 2 CO 3 and MnCO 3 Powder, according to 36SiO 2 :20Al 2 o 3 :15La 2 o 3 :6MgO:10.98ZnO:2BaO:6B 2 o 3 :2TiO 2 :2Na 2 CO 3 :0.02MnCO 3 The ratio of (molar ratio) is accurately weighed and placed in a ball mill for ball milling. After mixing evenly, place it in a corundum crucible, put it in a resistance furnace and heat it to 1500°C for 2 hours to melt it. Then, take out the glass melt and mix it. Quickly introduce it into a graphite mold for forming, and then put it into a resistance furnace at 760°C for 6 hours to eliminate the internal stress of the glass, so as to obtain a bulk precursor glass. Put the obtained precursor glass into a resistance furnace at 1100°C for 4 hours of isothermal heat treatment to crystallize the emitting part. La(Zn,Mg)Al was obtained by precipitation in the tested glass ceramics 11 o 19 :Mn 2+ Crystalline bulk glass-ceramic, ...

Embodiment 3

[0050] Embodiment 3: will analyze pure SiO 2 、Al 2 o 3 , La 2 o 3 , ZnO, MgO, BaO, B 2 o 3 、TiO 2 、Na 2 CO 3 and MnCO 3 Powder, according to 37SiO 2 :22Al 2 o 3 :13La 2 o 3 :7MgO:10.98ZnO:3BaO:5B 2 o 3 :1TiO 2 :3Na 2 CO 3 :0.02MnCO 3 The ratio of (molar ratio) is accurately weighed and placed in a ball mill for ball milling. After mixing evenly, place it in a corundum crucible, put it in a resistance furnace and heat it to 1500°C for 2 hours to melt it. Then, take out the glass melt and mix it. Quickly introduce it into a graphite mold for forming, and then put it into a resistance furnace at 750°C for 6 hours to eliminate the internal stress of the glass, so as to obtain a bulk precursor glass. Put the obtained precursor glass into a resistance furnace at 1100°C for 4 hours of isothermal heat treatment to crystallize the emitting part. La(Zn,Mg)Al was obtained by precipitation in the tested glass ceramics 11 o 19 :Mn 2+ Crystalline bulk glass-ceramic, ...

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Abstract

The invention relates to the technical field of fluorescent powder preparation, and relates to a green-light-emitting glass-ceramic used for wide-color-gamut backlight display and a preparation method thereof. The percentage content is as follows: 20‑35mol% SiO 2 ; 10‑30mol% Al 2 o 3 ; 10-25mol% La 2 o 3 ; 0‑15 mol% MO; 0‑15 mol% BaO; 0‑10 mol% B 2 o 3 ;0-5mol% TiO 2 ; 0‑3 mol% Na 2 CO 3 ; 0.05‑0.5 mol% MnCO 3 ; Wherein, M is Mg or Zn; A kind of glass ceramics prepared by the present invention is used for wide color gamut backlight display green light emission, and its structural feature is that LaMAl is embedded in the oxide glass matrix 11 o 19 :Mn 2+ The crystal grain is micro-crystalline phase, and is compatible with the existing LED backlight technology, and the performance has been significantly improved; the composite fluorescent material formed by spin-coating red fluorescent film on the glass ceramics is remotely packaged in the actual backlight system, effectively reducing The problem of aging of organic matter.

Description

technical field [0001] The invention relates to the technical field of solid luminescent materials, and more specifically relates to a green light-emitting glass-ceramic used for wide color gamut backlight display and a preparation method thereof. Background technique [0002] As a new generation of lighting source, LED has an important application in the field of liquid crystal display (LCD) due to its small size, energy saving, environmental protection, and fast response. LCD technology has strict requirements on image quality and color saturation, which puts forward higher requirements on the color gamut coverage of backlight devices. At present, the industry generally uses the NTSC (National Television Standards Committee) standard to express. The higher the NTSC color gamut value, the brighter the color of the object that the display device can display, and the closer to the color of the real object. Therefore, it is extremely important to develop a fluorescent materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/02C03B32/02C03C4/12
CPCC03C10/0009C03C10/00C03B32/02C03C4/12
Inventor 吴娇刘伟杰张勰燊李小双王波曾庆光
Owner WUYI UNIV