Blue light-emitting material and preparation method thereof

A technology for blue light-emitting materials and raw materials, which is applied in the field of blue light-emitting materials and their preparation, can solve the problems of reduced luminous quantum efficiency of BAM powder, low luminous efficiency and lumen efficiency, affecting lighting and display effects, etc., and achieves easy operation. , good luminous properties, simple preparation process

Inactive Publication Date: 2012-07-04
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The blue phosphor used in tricolor energy-saving lamps and plasma flat panel displays (PDP) is mainly BaMgAl 10 o 17 : Eu 2+ (BAM), but BAM has the problems of poor stability and low luminous efficiency and lumen efficiency under vacuum ultraviolet light excitation.
After working for a long time, the luminous quantum efficiency of BAM powder is greatly reduced, and the emission spectrum is also shifted, which affects the lighting and display effects

Method used

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  • Blue light-emitting material and preparation method thereof
  • Blue light-emitting material and preparation method thereof
  • Blue light-emitting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh europium oxide (Eu 2 o 3 )0.0004 g, barium carbonate (BaCO 3 ) 0.4140 g, calcium carbonate (CaCO 3 ) 0.4204 g, basic magnesium carbonate (Mg(OH) 2 4MgCO 3 ·6H 2 O) 0.2115 g silicon dioxide (SiO 2 ) 0.2523 g, ammonium chloride (NH4Cl) 0.0260 g in an agate mortar and thoroughly ground and mixed evenly, then calcined in a reducing atmosphere of a mixed gas of hydrogen and nitrogen (the volume ratio of hydrogen and nitrogen is 1:3), and sintered at 1200 ° C for 4 Hour. Cool naturally to room temperature. The sample is taken out and ground to finally obtain the product.

Embodiment 2

[0028] Weigh europium oxide (Eu 2 o 3 )0.0007 g, barium carbonate (BaCO 3 ) 0.4136 g, calcium carbonate (CaCO 3 ) 0.4204 g, basic magnesium carbonate (Mg(OH) 2 4MgCO 3 ·6H 2 O) 0.2115 g silicon dioxide (SiO 2 ) 0.2523 g, ammonium chloride (NH4Cl) 0.0260 g were thoroughly ground in an agate mortar and mixed evenly, then calcined in a reducing atmosphere of a mixed gas of hydrogen and nitrogen (the volume ratio of hydrogen and nitrogen was 1:3), and sintered at 1200 °C for 4 Hour. Cool naturally to room temperature. The sample is taken out and ground to finally obtain the product.

Embodiment 3

[0030] Weigh europium oxide (Eu 2 o 3 )0.0011 g, barium carbonate (BaCO 3 ) 0.4132 g, calcium carbonate (CaCO 3 ) 0.4204 g, basic magnesium carbonate (Mg(OH) 2 4MgCO 3 ·6H 2 O) 0.2115 g silicon dioxide (SiO 2 ) 0.2523 g, ammonium chloride (NH4Cl) 0.0260 g in an agate mortar and thoroughly ground and mixed evenly, then calcined in a reducing atmosphere of a mixed gas of hydrogen and nitrogen (the volume ratio of hydrogen and nitrogen is 1:3), and sintered at 1200 ° C for 4 Hour. Cool naturally to room temperature. The sample is taken out and ground to finally obtain the product.

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Abstract

The invention discloses a blue light-emitting material and a preparation method thereof. The blue light-emitting material has a chemical composition expression formula of Ba1-xEuxCa2MgSi2O8, wherein Eu<2+> ( bivalent rare earth europium ion) is an active ion, and x is the molar percentage coefficient of the active ion Eu<2+> relative to alkaline earth metal ion Ba<2+> and is not less than 0.001 and not more than 0.10. According to the invention, the preparation method is simple; and the prepared novel rare earth light-emitting material can emit blue light under the excitation of ultraviolet, has stronger light intensity than traditional commercial blue fluorescent powder BaMgAl10O17:Eu<2+> (BAM), and also has relatively better luminance intensity under the vacuum ultraviolet excitation.

Description

technical field [0001] The invention relates to a blue luminescent material and a preparation method thereof. Background technique [0002] Tricolor energy-saving lamps are currently the most widely used lighting equipment. Its principle is to use mercury vapor discharge to generate 254 nm ultraviolet light and a small amount of 185 nm vacuum ultraviolet light to excite the fluorescent powder in the lamp to achieve the purpose of lighting. In 1974, Dutch scientists first synthesized the blue luminescent material magnesium barium aluminate, the green luminescent material magnesium cerium aluminate and the red luminescent material yttrium oxide to make trichromatic energy-saving lamps. Compared with traditional fluorescent lamps, tricolor energy-saving lamps have the advantages of high lumen efficiency, good color rendering, and long service life. [0003] Plasma flat panel display (PDP) is a device that uses rare gas discharge to excite phosphor powder to emit light. PDP de...

Claims

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Application Information

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IPC IPC(8): C09K11/79
Inventor 梁宏斌侯得健苏锵
Owner SUN YAT SEN UNIV
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