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Boron aluminate luminescent material capable of generating green light and preparation method thereof

A boro-aluminate, luminescent material technology, applied in luminescent materials, chemical instruments and methods, etc., can solve problems such as unfavorable dynamic picture display, long afterglow time, and decreased luminous intensity, and achieves overcoming long afterglow time and uniform reaction. The effect of sufficient and lower sintering temperature

Inactive Publication Date: 2011-07-06
OCEANS KING LIGHTING SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, green phosphors with Mn 2+ is the luminescent center, due to the Mn 2+ spin-forbidden transition 4 T 1 → 6 A 1 The afterglow time is too long, which is not conducive to the display of dynamic pictures
Although it is possible to increase the Mn 2+ The doping concentration of ions reduces the afterglow time, but the luminous intensity also drops sharply

Method used

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  • Boron aluminate luminescent material capable of generating green light and preparation method thereof
  • Boron aluminate luminescent material capable of generating green light and preparation method thereof
  • Boron aluminate luminescent material capable of generating green light and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Preparation of Sr 0.76 Gd 0.02 Tb 0.1 Na 0.12 al 3 BO 7 Boroaluminate green luminescent material

[0031] Weigh strontium carbonate SrCO 3 0.5610g, aluminum hydroxide Al(OH) 3 1.1701g, sodium carbonate Na 2 CO3 0.0319g, boric acid H 3 BO 3 0.3092g, terbium oxide Tb 4 o 7 0.0935g, gadolinium oxide Gd 2 o 3 0.0181 g and flux (5%) boric acid H 3 BO 3 0.1092g. After fully grinding all the materials in an agate mortar, put them into a corundum crucible for pre-sintering at 600°C for 2h, then cool to room temperature, and grind again thoroughly. Finally, the reground product was calcined at 1000°C for 5 hours, cooled to room temperature, and Sr 0.76 Gd 0.02 Tb 0.1 Na 0.12 Al 3 BO 7 Boroaluminate green luminescent material.

Embodiment 2

[0032] Example 2 Preparation of Sr 0.76 Gd 0.02 Tb 0.1 Li 0.12 Al 3 BO 7 Boroaluminate green luminescent material

[0033] Weigh strontium carbonate SrCO 3 0.5610g, aluminum hydroxide Al(OH) 3 1.1701g, lithium carbonate Li 2 CO 3 0.0222g, boric acid H 3 BO 3 0.3092g, terbium oxide Tb 4 o 7 0.0935g, gadolinium oxide Gd 2 o 3 0.0181 g and flux (5%) boric acid H 3 BO 3 0.1087g. After fully grinding all the materials in an agate mortar, put them into a corundum crucible for pre-sintering at 600°C for 2h, then cool to room temperature, and grind again thoroughly. Finally, the reground product was calcined at 1000°C for 5 hours, cooled to room temperature, and Sr 0.76 Gd 0.02 Tb 0.1 Li 0.12 Al 3 BO 7 Boroaluminate green luminescent material.

Embodiment 3

[0034] Example 3 Preparation of Sr 0.76 Gd 0.02 Tb 0.1 K 0.12 Al 3 BO 7 Boroaluminate green luminescent material

[0035] Weigh strontium carbonate SrCO 3 0.5610g, aluminum hydroxide Al(OH) 3 1.1701g, potassium carbonate K 2 CO 3 0.0415g, boric acid H 3 BO 3 0.3092g, terbium oxide Tb 4 o 7 0.0935g, gadolinium oxide Gd 2 o 3 0.0181 g and flux (5%) boric acid H 3 BO 3 0.1097g. After fully grinding all the materials in an agate mortar, put them into a corundum crucible for pre-sintering at 600°C for 2h, then cool to room temperature, and grind again thoroughly. Finally, the reground product was calcined at 1000°C for 5 hours, cooled to room temperature, and Sr 0.76 Gd 0.02 Tb 0.1 K 0.12 Al 3 BO 7 Boroaluminate green luminescent material.

[0036] figure 1 Is the Sr prepared in this example 0.76 Gd 0.02 Tb 0.1 K 0.12 Al 3 BO 7 The excitation spectrum of the boroaluminate green luminescent material, the monitoring wavelength is 543nm. figure 2 It is...

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Abstract

The invention relates to a boron aluminate luminescent material capable of generating green light and a preparation method thereof. The chemical formula of the luminescent material capable of generating green light is M1-x-y-zGdxTbyNzAl3BO7, wherein M is at least one of Ba, Sr, N is Na, Li or K, and x, y, and z satisfy the relations: 0.001 <= x <= 0.20, 0.005 <= y <= 0.50, 0.02 <= z <= 0.30, 1-x-y-z > 0. The preparation method comprises the steps: weighing raw materials and a flux in proportion; grinding and mixing well, then pre-sintering under a lower temperature; then calcining under a temperature of 900 to 1100 DEG C for 1 to 24 hours; grinding after cooling; and obtaining the boron aluminate luminescent material capable of generating green light of the invention. The method of the invention is simple, has no pollution, and is benefit for industrial production. The obtained luminescent material capable of generating green light has short afterglow, high luminous intensity and excellent luminous performance, and can be widely used for PDP or mercury-free fluorescent lamp.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and more specifically relates to a boroaluminate green luminescent material and a preparation method thereof. Background technique [0002] In recent years, luminescent materials excited by vacuum ultraviolet light have become more and more important. One of its main applications is the large-screen high-definition plasma flat panel display (PDP). Rays excite different phosphors to generate red, green, and blue primary colors, respectively, so as to obtain color images. The quality of phosphor powder excited by vacuum ultraviolet rays directly determines the quality of color images and the life of devices, and plays an important role in PDP technology. [0003] At present, the three primary color phosphor luminescent materials widely used mainly include: red powder Y 2 o 3 :Eu 3+ , (Y, Gd)BO 3 :Eu 3+ , green powder Zn 2 SiO 4 :Mn 2+ 、BaAl 12 o 19 :Mn 2+ and blue powder B...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
Inventor 周明杰梁小芳刘军
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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