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Long persistence phosphorescence material in yellow light containing no rare earth activator, and preparation method

A phosphorescent material, long afterglow technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of luminous efficiency decline, high cost, easy hydration, etc., achieve stable luminescence and long afterglow characteristics, overcome chemical stability. The effect of poor and excellent chemical stability

Inactive Publication Date: 2005-01-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the poor water resistance of alkaline earth aluminate, it is easy to hydrate and harden, causing the luminous efficiency to decline, which limits its application.
Moreover, the cost is higher due to the use of expensive rare earth activators such as europium and the higher synthesis temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1. with yttrium oxide (Y 2 o 3 ), titanium dioxide (TiO 2 ), sulfur (S), sodium carbonate (Na 2 CO 3 ) as the raw material. Prepare batch materials according to the atomic ratio Y:Ti=1:(0.06±0.005), mix and ball mill for 30-40 minutes. Burn at 800±10°C for 2.5-3 hours to obtain the precursor powder. Using the above precursor powder as raw material, add S and Na 2 CO 3 , so that the atomic ratio of the batch composition is (Y+Ti):S:Na=1:(1.30±0.05):(0.75±0.05). Mix and ball mill for 0.5-1 hour, press into tablets, place in a graphite crucible, and burn at 1200±10°C for 2.5-3 hours. After the fired product is cooled, use 0.5mol·L -1 After washing with dilute nitric acid solution and deionized water, dry at 100±5°C to obtain a long-lasting phosphor, which is composed of Y 1.88 Ti 0.12 o 2 S.

Embodiment 2

[0024] Embodiment 2. with yttrium oxide (Y 2 o 3 ), titanium tetrachloride (TiCl 4 ), sulfur (S) and sodium carbonate (Na 2 CO 3 ) as the raw material. Mole (mol) ratio is Y 2 o3 :TiCl 4 =1:(0.12±0.002) Weigh TiCl 4 , pre-dissolved in Y 2 o 3 0.5mol L of 5-8% by weight -1 in nitric acid solution. The dissolved TiCl 4 Solution and Y 2 o 3 Mix for 0.5 hours, store the material at 25-30°C for 24 hours, ball mill for 0.5-1 hour, and burn at 800±10°C for 2.5-3 hours to obtain the precursor powder. Using the obtained precursor powder as raw material, add S and Na 2 CO 3 , the atomic ratio of the batch composition is (Y+Ti): S: Na=1: (1.30 ± 0.05): (0.75 ± 0.05), mixed ball milling for 0.5 to 1 hour, tablet molding, placed in a graphite crucible, Fire at 1200±10°C for 2.5-3 hours. After the product is cooled, use 0.5mol·L -1 Wash with dilute nitric acid solution and deionized water, and dry at 100±5°C to obtain a long-lasting phosphor, the composition of which is Y ...

Embodiment 3

[0025] Embodiment 3. with yttrium oxide (Y 2 o 3 ), titanium tetrachloride (TiCl 4 ), sulfur (S) and sodium carbonate (Na 2 CO 3 ) as the raw material. Mole (mol) ratio is Y 2 o 3 :TiCl 4 =1:(0.12±0.002) Weigh 9.08 grams of Y 2 o 3 and 0.92 g TiCl 4 , dissolved in 100ml and 10ml respectively, 50~70℃, 1.5mol·L -1 in dilute nitric acid solution. The dissolved TiCl 4 Solution and Y 2 o 3 After the solution was mixed for 1-2 hours, the excess acid was removed by evaporation, and when the pH was adjusted to 2-4, 20ml of 5mol L -1 For oxalic acid, stand at 25-30°C for 1-4 hours, and dry at 100±5°C to obtain the precursor powder. Using the obtained precursor powder as raw material, add S and Na 2 CO 3 , the atomic ratio of the batch composition is (Y+Ti): S: Na=1: (1.30 ± 0.05): (0.75 ± 0.05), mixed ball milling for 0.5 to 1 hour, tablet molding, placed in a graphite crucible, Fire at 1200±10°C for 2.5-3 hours. After the product is cooled, use 0.5mol·L -1 Wash wit...

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PUM

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Abstract

A yellow long persistence phosphorescent material not containing rare-earth activator is composed of y2-x-y TixMyO2S (0<x<0.15, 0 is less than or equal to y<0.15, M=Li, K, Ag, Au, Cd, Zn, Co, Ni, Cu, Mg, Ca, Sr and Ba) and it is especially for yellow long persistence phosphorescent material of Y2-xTiO2S (0<x<0.15). The preparing method includes applying solid phase reaction or wet chemical process to synthetize yellow long persistence phosphorescent meterial of T2-xTiO2S and Y2-x-yTixMyO2S by single-doping titanium or its coactivator in substrate lattice of Y2O2S.

Description

technical field [0001] The invention relates to a novel yellow long-lasting phosphorescent material and a preparation method thereof, in particular to a yellow long-lasting phosphorescent material containing no rare earth activator and a preparation method thereof. Background technique [0002] With the rapid development of modern science and technology, luminescent materials have developed from general electroluminescence, display and lighting materials to those that can be excited by high-energy rays, light, sound, heat, and chemical, biological and mechanical energy. They are widely used in ultra-thin TVs, Key materials in high-tech fields such as liquid crystal and plasma displays, micro-monitors and precision sensors and probes. [0003] Long afterglow luminescent materials are a kind of light-emitting materials that can absorb and store excitation light energy when illuminated, and can emit the stored energy in the form of light gradually and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65
Inventor 张鹏越王民权洪樟连钱国栋王智宇樊先平
Owner ZHEJIANG UNIV
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