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Borate green luminescent material and preparation method thereof

A technology of luminescent materials and borates, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of unfavorable dynamic picture display, decrease of luminous intensity, long afterglow time, etc., to overcome long afterglow time and reduce sintering temperature , the effect of uniform and sufficient reaction

Inactive Publication Date: 2014-01-08
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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  • Borate green luminescent material and preparation method thereof
  • Borate green luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Preparation of Sr 3 Y 0.95 Tb 0.05 (BO 3 ) 3 Borate green luminescent material

[0026] Weigh strontium carbonate SrCO 3 2.2145g, yttrium oxide Y 2 o 3 0.5361g, boric acid H 3 BO 3 1.0202g (10% in excess) and terbium oxide Tb 4 o 7 0.0467g. After fully grinding all the materials in an agate mortar, put them into a corundum crucible for pre-sintering at 500°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 3 Y 0.95 Tb 0.05 (BO 3 ) 3 Boroaluminate green luminescent material.

[0027] figure 1 Is the Sr prepared in this example 3 Y 0.95 Tb 0.05 (BO 3 ) 3 The excitation spectrum of the boroaluminate green luminescent material, the monitoring wavelength is 543nm. figure 2 is the emission spectrum of the boroaluminate green luminescent material prepared in this embodiment, by figure 2 It can be seen that the boroalumi...

Embodiment 2

[0028] Example 2 Preparation of Sr 3 La 0.95 Tb 0.05 (BO 3 ) 3 Boroaluminate green luminescent material

[0029] Weigh strontium carbonate SrCO 3 2.2145g, lanthanum oxide La 2 o 3 0.7738g, boric acid H 3 BO 3 1.0202g (10% in excess) and terbium oxide Tb 4 o 7 0.0467g. After fully grinding all the materials in an agate mortar, put them into a corundum crucible for pre-sintering at 500°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 3 La 0.95 Tb 0.05 (BO 3 ) 3 Boroaluminate green luminescent material.

Embodiment 3

[0030] Example 3 Preparation of Ba 3 Y 0.9 Tb 0.1 (BO 3 ) 3 Boroaluminate green luminescent material

[0031] Weigh barium carbonate BaCO 3 2.9600g, yttrium oxide Y 2 o 30.5081g, boric acid H 3 BO 3 1.0202g (10% in excess) and terbium oxide Tb 4 o 7 0.0934g. After fully grinding all the materials in an agate mortar, put them into a corundum crucible for pre-sintering at 500°C for 2h, then cool to room temperature, and grind again thoroughly. Finally, the reground product was calcined at 1000°C for 5h, cooled to room temperature, and Ba 3 Y 0.9 Tb 0.1 (BO 3 ) 3 Boroaluminate green luminescent material.

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Abstract

The invention relates to a borate green luminescent material and a preparation method thereof. The chemical formula of the green luminescent material is M3Ln1-xTbx(BO3)3, wherein, M is at least one of Ca, Sr and Ba; Ln is Y or La; and the value range of x is smaller than or equal to 0.50 and larger than or equal to 0.005. The preparation method of the green luminescent material is that raw materials and a fluxing agent are weighed according to proportions; and after the raw materials and the fluxing agent are ground and mixed, the mixed material is firstly pre-sintered at a low temperature, then calcined for 1 to 24 hours at a temperature between 900 DEG C and 1,100 DEG C, and ground after being cooled; and then the borate green luminescent material disclosed by the invention is acquired. The preparation method disclosed by the invention is simple and pollution-free, and facilitates industrial production; and the acquired green luminescent material has the advantages of short afterglow time, high luminescent intensity and excellent luminescent performance, and can be widely used on PDPs (plasma display panels) or non-mercury fluorescent lamps.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and more specifically relates to a borate green luminescent material and a preparation method thereof. Background technique [0002] Compared with commonly used CRT displays and LCD displays, plasma flat panel displays (PDP) have many advantages such as wide viewing angle, large area, fast response, and good color reproduction. They can be made into large-size displays and are the best choice for wall-mounted TVs. The two key technologies of PDP display are circuit and luminescent material. With the improvement of circuit design, the selection of luminescent material has become the most critical technology of PDP display. Since mercury-free fluorescent lamps do not contain mercury that is toxic to the human body, compared with traditional high-pressure mercury lamps and low-pressure mercury lamps, they are of great significance from the perspective of environmental protection. Ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 周明杰梁小芳刘军刘世良
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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