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Borate luminescent material and preparation method thereof

A technology of luminescent materials and borates, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of reduced luminous intensity, unfavorable dynamic picture display, long afterglow time, etc.

Inactive Publication Date: 2011-07-27
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, for Zn 2 SiO 4 :Mn 2+ and BaAl 12 o 19 :Mn 2+ In terms of Mn 2+ As a luminescent center, due to the Mn 2+ The spin of the forbidden 4 T 1 → 6 A 1 emission, afterglow time is too long, Zn 2 SiO 4 :Mn 2+ For example, generally 10-15ms, which is obviously not conducive to the display of dynamic pictures
For PDP, the afterglow time of the currently used vacuum ultraviolet (VUV) phosphor is relatively long, because the human eye's visual persistence time for moving images is about 5ms, which requires the afterglow time of the VUV phosphor used for display to be within 1 ~5ms is better, but currently Zn is commonly used in VUV green phosphors for PDP 2 SiO 4 :Mn Its afterglow time is about 10-15ms, which is much longer than the reasonable afterglow time, which causes the tailing phenomenon when the PDP displays moving images
Although by Mn 2+ The increase of ion doping concentration can reduce the afterglow time, but the luminous intensity decreases rapidly

Method used

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  • Borate luminescent material and preparation method thereof
  • Borate luminescent material and preparation method thereof
  • Borate luminescent material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Weigh calcium carbonate CaCO 3 3.0027g, boric acid H 3 BO 3 2.9680g (20% excess), Yttrium oxide Y 2 O 3 1.8065g, terbium oxide Tb 4 O 7 0.1869g and gadolinium oxide Gd 2 O 3 After 0.5437g was fully ground in an agate mortar, it was placed in a corundum crucible and pre-fired at 800°C for 4h, then naturally cooled to room temperature, and then taken out and fully ground again. Finally, in a reducing atmosphere, the ground calcined product was calcined at 1000°C for 4 hours, cooled to room temperature naturally, and after being taken out and ground, white powder Y was obtained. 1.6 Gd 0.3 Tb 0.1 Ca 3 B 4 O 12 Green luminescent material.

Embodiment 2

[0045] Weigh strontium carbonate SrCO 3 4.4289g, boric acid H 3 BO 3 2.9680g (20% excess), Yttrium oxide Y 2 O 3 1.8065g, terbium oxide Tb 4 O 7 0.1869g and gadolinium oxide Gd 2 O 3 After 0.5437g was fully ground in an agate mortar, it was placed in a corundum crucible and pre-fired at 800°C for 4h, then naturally cooled to room temperature, and then taken out and fully ground again. Finally, in a reducing atmosphere, the ground calcined product was calcined at 1050°C for 5 hours, cooled to room temperature naturally, and white powdery Y was obtained after removal and grinding. 1.6 Gd 0.3 Tb 0.1 Sr 3 B 4 O 12 Green luminescent material.

Embodiment 3

[0047] Weigh barium carbonate BaCO 3 5.9202g, boric acid H 3 BO 3 2.9680g (20% excess), Yttrium oxide Y 2 O 3 1.8065g, terbium oxide Tb 4 O 7 0.1869g and gadolinium oxide Gd 2 O 3 After 0.5437g was fully ground in an agate mortar, it was placed in a corundum crucible and pre-fired at 700°C for 4 hours, then naturally cooled to room temperature, and then taken out to fully grind again. Finally, in a reducing atmosphere, the ground calcined product is calcined at 900°C for 5 hours, cooled naturally to room temperature, and after taking it out and grinding, white powdery Y is obtained. 1.6 Gd 0.3 Tb 0.1 Ba 3 B 4 O 12 Green luminescent material.

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Abstract

The invention relates to the technical field of luminescent materials, and provides a borate luminescent material which comprises a compound disclosed as the following chemical formula: Y[2-x-y]Gd[x]Tb[y]M[3]B[4]O[12], wherein x=0.01-1.2, y=0.01-0.6, and M is an alkaline earth metal element. The luminescent material has the advantages of favorable vacuum ultraviolet absorptivity, stable physicochemical characteristics, and high capabilities for resisting vacuum ultraviolet radiation and ion bombardment; and meanwhile, due to the sensitization action of Gd<3+> on Tb<3+>, the luminescent intensity and luminescent efficiency of the Tb<3+> are enhanced, and the vacuum ultraviolet absorptivity of the luminescent material is enhanced. In addition, the invention also provides a method for preparing the borate luminescent material.

Description

Technical field [0001] The invention belongs to the technical field of luminescent materials, and specifically relates to a borate luminescent material and a preparation method thereof. Background technique [0002] Lighting and display devices have become one of the most commonly used light-emitting devices in people's daily lives. Plasma Display Panel (PDP) or mercury-free fluorescent lamps are one of them. In these light-emitting devices, the performance of the luminescent material is a key factor in determining its luminous performance and efficiency. As we all know, red, green, and blue luminescent materials are the most widely studied three-primary color luminescent materials. [0003] Currently, commercial luminescent materials mainly include red luminescent material Y 2 O 3 :Eu 3+ , (Y, Gd)BO 3 :Eu 3+ , Green luminescent material Zn 2 SiO 4 :Mn 2+ , BaAl 12 O 19 :Mn 2+ And blue luminescent material Y 2 SiO 5 :Ce 3+ , LaPO 4 :Tm 3+ , BaMgAl 10 O 17 :Eu 2+ . Among them, for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 周明杰刘军梁小芳廖秋荣田梓峰
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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