Borate red and green fluorophor and preparation method thereof

A green fluorescence and borate technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems that the performance cannot meet the development of science and technology, and achieve the effect of cheap raw materials, good process repeatability, and broad application prospects

Inactive Publication Date: 2008-03-26
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But with the development of technology, Y 2 o 3 :Eu 3+ , LaBO 3 :Eu 3+ (or Tb 3+ ) performance can no longer meet the needs of scientific and technological development, and people demand to provide luminescent materials with better performance
At present, there is no report at home and abroad to use Na 3 La 9 B 8 o 27 fluorescent material

Method used

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  • Borate red and green fluorophor and preparation method thereof
  • Borate red and green fluorophor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] According to the molar ratio of B:Na:La:Ln=8:3:8.91:0.09, respectively weigh two groups of compound samples containing B, Na, La, Ln: Na 2 CO 3 、H 3 BO 3 , La 2 o 3 , Tb 4 o 7 and Na 2 CO 3 、H 3 BO 3 , La 2 o 3 、Eu 2 o 3 , weigh Li according to 2% of the total mass of the respective compounds 2 CO 3 , and then grind and mix the two groups of materials separately, put them in two corundum crucibles, pre-fire at 200°C for 5 hours, take out the furnace charge after cooling, and then sinter at 950°C for 1 hour, cool the product to room temperature, grind, Respectively, the composition is Na 3 La 8.55 Tb 0.45 B 8 o 27 and Na 3 La 8.55 Eu0.45 B 8 o 27 of phosphors. Na 3 La 8.55 Tb 0.45 B 8 o 27 Phosphor emits bright green light under the excitation of 264nm and 365nm ultraviolet light, Na 3 La 8.55 Eu 0.45 B 8 o 27 The phosphor emits bright red light under the excitation of 264nm and 365nm ultraviolet light. Figure 1 is Na 3 La 8.55 Eu 0...

Embodiment 2

[0031] According to the molar ratio of B:Na:La:Ln=8:3:5.49:3.51, respectively weigh two groups of compound samples containing B, Na, La, Ln: Na 2 CO 3 、H 3 BO 3 、La 2 o 3 , Tb 4 o 7 and Na 2 CO 3 、H 3 BO 3 、La 2 o 3 、Eu 2 o 3 , weigh Li according to 30% of the total mass of the respective compounds 2 CO 3 , and then grind and mix the two groups of materials separately, place them in two corundum crucibles, pre-fire at 600°C for 2 hours, take out the furnace material after cooling, and then sinter at 800°C for 48 hours. The product is cooled to room temperature and ground. Respectively, the composition is Na 3 La 8.55 Tb 0.45 B 8 o 27 and Na 3 La 8.55 Eu 0.45 B 8 o 27 of phosphors. Na 3 La 8.55 Tb 0.45 B 8 o 27 Phosphor emits bright green light under the excitation of 264nm and 365nm ultraviolet light, Na 3 La 8.55 Eu 0.45 B 8 o 27 The phosphor emits bright red light under the excitation of 264nm and 365nm ultraviolet light.

Embodiment 3

[0033] According to the molar ratio of B:Na:La:Ln=8:3:7.2:1.8, respectively weigh two groups of compound samples containing B, Na, La, Ln: Na 2 CO 3 、H 3 BO 3 、La 2 o 3 , Tb 4 o 7 and Na 2 CO 3 、H 3 BO 3 、La 2 o 3 、Eu 2 o 3 , Weigh Li according to 14% of the total mass of the respective compounds 2 CO 3 , and then grind and mix the two groups of materials separately, put them in two corundum crucibles, pre-fire at 400 °C for 3.5 hours, take out the furnace material after cooling, wash with deionized water, filter, dry, and then heat at 900 °C After sintering for 24 hours, the product was cooled to room temperature and ground to obtain the composition Na 3 La 8.55 Tb 0.45 B 8 o 27 and Na 3 La 8.55 Eu 0.45 B 8 o 27 of phosphors. Na 3 La 8.55 Tb 0.45 B 8 o 27 Phosphor emits bright green light under the excitation of 264nm and 365nm ultraviolet light, Na 3 La 8.55 Eu 0.45 B 8 o 27 The phosphor emits bright red light under the excitation of 264nm...

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Abstract

The present invention provides red and green borate fluorophor and its preparation process. The fluorophor is RE ion activated sodium lanthanum borate in the chemical expression of Na3La9(1-x)B8O27:Ln9x3+, where, Ln is Eu or Tb, x is 0-0.4. It is prepared through one high temperature solid phase synthesis process or one sol-gel process, and has Eu3+ or Tb3+ doped into the matrix Na3La9B8O27. It has stable physical and chemical properties, low cost, simple preparation process and other advantages. It has very high light emitting efficiency under the excitation of 254 nm or 365 nm ultraviolet ray, relatively great non-linear optical effect and wide application foreground.

Description

Technical field: [0001] The invention relates to the technical field of luminescent materials, in particular to a borate red and green phosphor with borate as a matrix, and also relates to a preparation method of the phosphor. Background technique: [0002] Borate phosphors have a long history of development. Rare earth borates have excellent fluorescence properties and nonlinear optical properties due to their wide band gap, good thermal stability and rich and diverse structures. With the development of new technologies such as mercury-free fluorescent lamps and PDP vacuum ultraviolet light-emitting displays, the research and development of borate phosphors has become one of the research hotspots. Such as LnBO 3 :R 3+ system is a class of excellent luminescent materials, LnBO 3 :Eu 3+ (or Tb 3+ ): The rare earth-doped fluorescent material with the best performance under vacuum ultraviolet excitation. where Eu 3+ and Tb 3+ Separately activated LnBO 3 The system (Ln...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 李志华张鲁宁
Owner SHANDONG NORMAL UNIV
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