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Phosphate-base red luminescent material and preparation method thereof

A technology of red luminescence and phosphate, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of limited vacuum ultraviolet light absorption capacity and low external quantum efficiency, etc.

Inactive Publication Date: 2011-07-06
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although LiGdF 4 :Eu 3+ 、BaF 2 :Gd 3+ , Eu 3+ The internal quantum efficiencies of these materials all reach more than 190%, but their external quantum efficiencies are very low, one of the main reasons is due to the Gd 3+ of 6 G J The absorption of vacuum ultraviolet light by the energy level is 4f 7 Forbidden or partially released transitions within the configuration have limited absorption of vacuum ultraviolet light

Method used

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  • Phosphate-base red luminescent material and preparation method thereof
  • Phosphate-base red luminescent material and preparation method thereof
  • Phosphate-base red luminescent material and preparation method thereof

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preparation example Construction

[0027] See Figure 4 To illustrate the flow of the preparation method of the phosphate-based red luminescent material of the embodiment of the present invention, the preparation method includes the following steps:

[0028] S01: Select the source compound of alkaline earth metal ion, the source compound of rare earth ion and Nd according to the stoichiometric ratio 3+ , Gd 3+ And Eu 3+ The stoichiometric ratio of the source compound is in accordance with the structural formula M 3 Re 1-x-y-z Nd x Gd y Eu z (PO 4 ) 3 The molar ratio of the corresponding element in the phosphate ion, wherein the molar ratio of the source compound of phosphate ion is 10%-30%, M is alkaline earth metal element, Re is rare earth element, x=0.005-0.1, y=0.005-0.3, z =0.02-0.5;

[0029] S02: Mix the source compounds;

[0030] S03: Pre-treat the mixture for sintering and then cool it;

[0031] S04: Take out the sintered product for grinding, then calcinate the ground product, and obtain the phosphate-based ...

Embodiment 1

[0038] Weigh strontium carbonate SrCO 3 1.4763g, ammonium dihydrogen phosphate NH 4 H 2 PO 4 1.4954g (the molar ratio is over 30%, the following examples are basically the same and will not be repeated), gadolinium oxide Gd 2 O 3 0.5317g, neodymium oxide Nd 2 O 3 0.0112g, europium oxide Eu 2 O 3 0.0587g, boric acid H 3 BO 3 After 0.0052g is fully ground in an agate mortar, it is placed in a corundum crucible and pre-fired at 600°C for 2h, then cooled to room temperature, and taken out to be fully ground again. Finally, calcinate it at 1200 for 5h, cool it, take it out and grind it to get Sr 3 Nd 0.02 Gd 0.88 Eu 0.10 (PO 4 ) 3 Phosphate-based red luminescent material.

Embodiment 2

[0040] Weigh barium carbonate BaCO 3 1.9733g, ammonium dihydrogen phosphate NH 4 H 2 PO 4 1.4954g, gadolinium oxide Gd 2 O 3 0.5679g, neodymium oxide Nd 2 O 3 0.0056g, europium oxide Eu 2 O 3 0.0294g, barium fluoride BaF 2 After 0.0058g is fully ground in an agate mortar, it is placed in a corundum crucible and pre-fired at 600°C for 2h, then cooled to room temperature, and taken out to be fully ground again. Finally, calcinate it at 1200℃ for 5h, cool it, take it out and grind it to get Ba 3 Gd 0.94 Nd 0.01 Eu 0.05 (PO 4 ) 3 Phosphate-based red luminescent material.

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Abstract

The invention provides a phosphate-base red luminescent material of which the structural formula is M[3]Re[1-x-y-z]Nd[x]Gd[y]Eu[z](PO[4])[3], wherein M is an alkaline earth metal element, Re is a rare earth element, x=0.005-0.1, y=0.005-0.3, and z=0.02-0.5. The invention also provides a preparation method of the luminescent material, which comprises the following steps: selecting source compoundsof M<2+>, phosphate ions, rare earth ions, Nd<3+>, Gd<3+> and Eu<3+> according to the mol ratio in the structural formula, wherein the amount of the source compound of the phosphate ions exceeds 10-30% in mol ratio; evenly mixing the source compounds; sintering the mixture, and cooling; and taking out the sinter, grinding, calcining, and cooling to obtain the luminescent material. In the luminescent material, by codoping Nd<3+>-Gd<3+>-Eu<3+>, the luminescent efficiency is obviously enhanced, and the luminescent material has wide production and application prospects.

Description

Technical field [0001] The invention belongs to the technical field of luminescent materials, and specifically relates to a phosphate-based red luminescent material excited by vacuum ultraviolet light and a preparation method thereof. Background technique [0002] Recently, devices with vacuum ultraviolet light excitation have been widely developed. The mechanism of the device is to use vacuum ultraviolet light generated by rare gas discharge to excite luminescent materials to emit light. At the same time, research shows that the efficiency of phosphor η f Compared with the energy ratio of phosphor radiated photon and excited photon ε vis / ε UV , Phosphor quantum efficiency η qe And phosphor coating efficiency η c In direct proportion, these three are all related to working gas. Therefore, compared with the traditional mercury lamp, if you want to use the 147nm or 172nm generated by the rare gas Xe radiation discharge as the excitation light source to obtain the same efficiency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/81
Inventor 周明杰梁小芳刘军刘世良
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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