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Rare-earth luminescent materials for plasma planar plate display and non-mercury fluorescent light and production thereof

A flat-panel display and rare earth luminescent technology, which is applied in luminescent materials, chemical instruments and methods, parts of gas discharge lamps, etc., can solve the problems of rare earth ion luminescent properties, low luminous efficiency, and poor color purity. Reduced thermal deterioration, short fluorescence lifetime, and high luminous intensity

Inactive Publication Date: 2008-02-06
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these PDP phosphors still have the following deficiencies: red powder (Y, Gd) BO 3 :Eu 3+ The color purity is not good, and Y 2 o 3 :Eu 3+ Relatively low luminous efficiency; blue powder BaMgAl 10 o 17 :Eu 2+ (BAM) obvious light decay; green powder Zn 2 SiO 4 :Mn 2+ Afterglow is too long
However, there is no report on the luminescence properties of other rare earth ions in this system or similar systems, especially the luminescence properties under vacuum ultraviolet (VUV) light excitation.

Method used

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  • Rare-earth luminescent materials for plasma planar plate display and non-mercury fluorescent light and production thereof
  • Rare-earth luminescent materials for plasma planar plate display and non-mercury fluorescent light and production thereof
  • Rare-earth luminescent materials for plasma planar plate display and non-mercury fluorescent light and production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh barium carbonate (BaCO 3 ) 0.9769g, magnesium oxide (MgO) 0.1008g, boric acid (H 3 BO 3 ) 0.3091g, sodium carbonate (Na 2 CO 3 ) 0.0013g, cerium oxide (CeO 2 ) 0.0043g, fully ground in an agate mortar and mixed evenly, and then sintered in two steps: first, pre-sintered at 300°C for 1 hour in an air atmosphere, cooled to room temperature, taken out and thoroughly ground again and mixed evenly , then in H 2 / N 2 Under atmosphere, sinter at 800°C for 12 hours. The sample is taken out and ground to finally obtain the sample.

Embodiment 2

[0018] Weigh barium carbonate (BaCO 3 ) 0.9374g, calcium carbonate (CaCO 3 ) 0.2502g, boric acid (H 3 BO 3 ) 0.3091g, sodium carbonate (Na 2 CO 3 ) 0.0066g, cerium oxide (CeO 2 ) 0.0215g, fully ground in an agate mortar and mixed evenly, and then sintered in two steps: first, pre-sintered in air atmosphere at a lower temperature of 400°C for 1 hour, cooled to room temperature, taken out and thoroughly ground again and mixed evenly , then in H 2 / N 2 Under atmosphere, sinter at 850°C for 10 hours. The sample is taken out and ground to finally obtain the sample.

Embodiment 3

[0020] Weigh strontium carbonate (SrCO 3 ) 0.6864g, magnesium oxide (MgO) 0.1008g, boric acid (H 3 BO 3 ) 0.3091g, sodium carbonate (Na 2 CO 3 ) 0.0093g, cerium oxide (CeO 2 ) 0.0301g, fully ground in an agate mortar and mixed evenly, and then sintered in two steps: first, pre-sintered in air atmosphere at a lower temperature of 500°C for 1.5 hours, cooled to room temperature, taken out and fully ground again and mixed evenly , then in H 2 / N 2 Under atmosphere, sinter at 900°C for 8 hours. The sample is taken out and ground to finally obtain the sample.

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Abstract

A rare earth luminescent material for plasma planar displaying device and non-mercury fluorescent light and its production are disclosed. Its chemical formula is XxYy(BO3)2: Cem.Lnn.Nam+n; X and Y are chosen from alkaline metal ion Mg2+, Ca2+, Sr2+ and Ba2+; Ln is chosen from La, Ce, Pr, Nd, Sm, Eu, Gd, Tb and Dy; x+y=3; 0.01<=m<=0.10, 0.00<=n<=0.10. It has better light wavelength coincidence and stability and can reach high-efficient excitation.

Description

technical field [0001] The invention relates to a rare-earth luminescent material for plasma flat panel display and mercury-free fluorescent lamp and a preparation method thereof. Background technique [0002] In recent years, color plasma flat panel display (PDP) has unique advantages in large screen, thinner, high definition, etc. It is the preferred technology for HDTV and has broad application prospects. The working principle of color PDP is to use gas discharge to generate vacuum ultraviolet radiation (VUV), and then excite three photoluminescent phosphors of red, green and blue to produce red, green and blue three primary colors of light. The three-color fluorescent material excited by vacuum ultraviolet radiation (VUV) used in the color PDP is one of the key materials for realizing the color PDP. Phosphor powders for color PDPs are developed from conventional fluorescent powders for lamps. Since the excitation of phosphors uses VUV radiation, only a few lamp powder...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78H01J17/04H01J61/44
Inventor 梁宏斌林惠红田梓峰曾取苏锵
Owner SUN YAT SEN UNIV
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