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Fluo phosphate green luminescent material and method for preparing same

A technology of luminescent materials and fluorophosphate, applied in the direction of luminescent materials, chemical instruments and methods, can solve the problems of mercury-containing fluorescent lamp pollution, long afterglow time, short afterglow time and other problems of screen picture quality, and achieve low cost, simple steps, easy-to-handle effects

Inactive Publication Date: 2013-10-23
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

[0005] The technical problem to be solved by the present invention is to provide a fluorophosphate green luminescent material with short afterglow time, high emission intensity and green light emission under mercury-free excitation conditions and its preparation method to solve the problems in the prior art. The afterglow time of the green luminescent material of PDP is too long, which affects the picture quality of the PDP screen, and there are problems such as heavy metal mercury pollution in mercury-containing fluorescent lamps.

Method used

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  • Fluo phosphate green luminescent material and method for preparing same
  • Fluo phosphate green luminescent material and method for preparing same
  • Fluo phosphate green luminescent material and method for preparing same

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Weigh cerium oxide (CeO 2 ) 0.61g, terbium oxide (Tb 4 o 7 ) 0.052g, diammonium hydrogen phosphate ((NH 4 ) 2 HPO 4 ) 1.06g, Lithium Fluoride (LiF) 0.16g, fully ground in an agate mortar and mixed evenly, pre-sintered at 300°C for 4 hours in a carbon monoxide atmosphere, cooled to room temperature, taken out and fully ground again and Mix evenly, and sinter at 700°C for 24 hours in a mixed reducing atmosphere of nitrogen and hydrogen. The sintered product is taken out and ground, washed with deionized water, filtered, and dried to obtain the final product.

Embodiment 2

[0033] Weigh praseodymium oxide (Pr 6 o 11 ) 0.61g, terbium oxide (Tb 4 o 7 ) 0.075g, diammonium hydrogen phosphate ((NH 4 ) 2 HPO 4 ) 1.06g, Lithium fluoride (LiF) 0.16g, fully ground in an agate mortar and mixed evenly, pre-sintered at 300°C for 2 hours in a carbon monoxide atmosphere, cooled to room temperature, taken out and fully ground again and mix evenly, and sinter at 600° C. for 24 hours in a carbon monoxide atmosphere, take out the sintered product, grind it, wash it with deionized water, filter it, and dry it to finally obtain the product.

Embodiment 3

[0035] Weigh neodymium oxide (Nd 2 o 3 ) 0.57g, terbium oxide (Tb 4 o 7 ) 0.11g, diammonium hydrogen phosphate ((NH 4 ) 2 HPO 4 ) 1.06g, Lithium fluoride (LiF) 0.16g, fully ground in an agate mortar and mixed evenly, pre-sintered at 350°C for 2 hours in a carbon monoxide atmosphere, cooled to room temperature, taken out and fully ground again and mix evenly, and sinter at 600°C for 12 hours in a mixed reducing atmosphere of nitrogen and hydrogen, take out the sintered product, grind it, wash with deionized water, filter, and dry to obtain the final product.

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Abstract

The invention relates to a fluo phosphate green luminescent material. The chemical formula of the material is M3R2(1-x)F3(PO4)2:Tbx, wherein M is alkali metal ion, R is a rare earth element, and x is mole percentage of correspondingly doped trivalent Tb ion based on the rare earth ion R and more than or equal to 0.005 and less than or equal to 0.3. The invention also relates to a method for preparing the material. The method comprises the following steps of: 1, according to a stoichiometric ratio, selecting source compounds of alkali metal ion, source compounds of phosphate radical ion, source compounds of rare earth ion, source compounds of trivalent Tb ion and source compounds of fluoride ion, wherein the stoichiometric ratio of all source compounds refers to the mole percentage of the corresponding element in the chemical formula of M3R2(1-x)F3(PO4)2:Tbx; 2, grinding all source compounds and mixing; 3, sintering the mixture obtained in the step 2 under the reducing atmosphere for the first time, and then cooling and grinding; and 4, sintering the mixture obtained in the step 3 under the reducing atmosphere for the second time, and then cooling and grinding to obtain the luminescent material.

Description

technical field [0001] The invention relates to a luminescent material manufacturing technology, in particular to a fluorophosphate green luminescent material suitable for plasma flat panel displays and mercury-free fluorescent lamps and a preparation method thereof. Background technique [0002] Plasma Display Panel (PDP) is a kind of ultraviolet light (mainly at 147 nanometers and 172 nanometers) generated by the plasma discharge of a xenon (Xe)-based rare gas mixture under the control of the drive circuit to excite three primary color phosphors. A flat panel display technology that emits light. Plasma flat panel display technology has become one of the important large-screen and ultra-thin display methods due to its many excellent characteristics such as wide viewing angle, long life, fast refresh rate, high luminous efficiency and brightness, easy to manufacture large screens, and wide working range. Phosphor, as a key component, directly affects the overall effect of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/86
Inventor 周明杰田梓峰廖秋荣梁小芳刘军
Owner OCEANS KING LIGHTING SCI&TECH CO LTD