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Silicate blue light fluorescent powder and preparation method thereof

A phosphor and silicate technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problem of low color purity, and achieve the effects of good color rendering, easy promotion, and simple synthesis conditions.

Inactive Publication Date: 2014-08-13
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the InGaN tube core with near-ultraviolet (350-410 nm) radiation is used to excite trichromatic phosphors to realize white LEDs, which can improve the yellow phosphors (YAG:Ce 3+ ) The problem of low color purity

Method used

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  • Silicate blue light fluorescent powder and preparation method thereof
  • Silicate blue light fluorescent powder and preparation method thereof
  • Silicate blue light fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A silicate blue light-emitting phosphor by the expression Gd 4.67 Si 3 o 13 :xBi 3+ , when x = 0.01, weigh Gd 2 o 3 2.1155 g, SiO 2 0.48 g, Bi 2 o 3 0.0012 grams, put it into an agate mortar and grind it thoroughly, put it into a corundum crucible, cover it, and put it in a high-temperature furnace; heat it to 1200°C and keep the temperature constant for 2 hours; then cool it naturally, take it out and grind it, and the body color is white blue light emitting phosphors.

[0027] figure 1 It is the X-ray color atlas of the color-tunable phosphor material of Example 1 of the present invention, by figure 1 It can be seen that the diffraction peak position of the fluorescent material of the present invention is consistent with ISCD20325 in the crystallographic database, indicating that the synthetic fluorescent powder is Gd 4.67 Si 3 o 13 .

[0028] figure 2 It is embodiment 1 of the present invention Gd 4.67 Si 3 o 13 : 0.01Bi 3+ The excitation spectr...

Embodiment 2

[0031] A silicate blue light-emitting phosphor by the expression Gd 4.67 Si 3 o 13 :xBi 3+ , when x = 0.02, weigh Gd 2 o 3 2.1155 g, SiO 2 0.48 g, Bi 2 o 3 0.0233, put it into an agate mortar and grind it thoroughly, put it into a corundum crucible, cover it, and place it in a high-temperature furnace; heat it to 1250°C and keep the temperature constant for 3 hours; then cool it naturally, take it out and grind it, and the body color is white Blue light emitting phosphor.

Embodiment 3

[0033] A silicate blue light-emitting phosphor by the expression Gd 4.67 Si 3 o 13 :xBi 3+ , when x = 0.03, weigh Gd 2 o 3 2.1155 g, SiO 2 0.48 g, Bi 2 o 3 0.0350 g, put it into an agate mortar and grind it thoroughly, put it into a corundum crucible, cover it, and place it in a high-temperature furnace; heat it to 1350°C and keep the temperature constant for 4 hours; then cool it naturally, take it out and grind it, and the body color is white blue light emitting phosphors.

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Abstract

The invention relates to silicate blue light fluorescent powder having an expression formula of Gd4.67Si3O13:xBi<3+>, wherein doped Bi<3+> is an active ion, and x ranges from 0.01 to 0.2. According to the fluorescent powder, a small amount of Bi<3+> ions are introduced into a Gd4.67Si3O1 matrix, and under irradiation of ultraviolet light with the peak value being about 370nm, and bandwidth emission close to 450nm can be generated. The preparation method of the blue light fluorescent powder comprises the following steps: respectively weighing elementary substances, oxides, halides or corresponding salts of Gd, Si and Bi according to amounts of substances in the expression formula; grinding and fully mixing in an agate mortar, putting in a corundum crucible and covering, and heating in a high-temperature furnace to 1200-1400 DEG C, holding the temperature at 1200-1400 DEG C constantly for 2-8 hours; and then, naturally cooling to room temperature, taking out and smashing to obtain the adjustable blue light emission fluorescent powder.

Description

technical field [0001] The invention relates to the technical field of rare earth luminescent materials, in particular to an ultraviolet-excited blue phosphor; the invention also relates to a preparation method of the blue phosphor. [0002] Background technique [0003] Compared with traditional lighting sources, white LEDs are considered the fourth generation of light sources due to their advantages such as energy saving, environmental protection, safety, long life, low power consumption, high brightness, and easy maintenance of shock resistance. At present, the InGaN tube core with near-ultraviolet (350-410 nm) radiation is used to excite trichromatic phosphors to realize white LEDs, which can improve the yellow phosphors (YAG:Ce 3+ ) The problem of low color purity. The use of silicate as the luminescent material matrix is ​​beneficial to improve the luminous efficiency, because the interaction energy between the luminescent center and the silicate matrix is ​​low, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79
Inventor 金叶周虹鹏蒋明松
Owner CHONGQING UNIV OF TECH
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