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A kind of bismuth doped borate blue fluorescent powder and its preparation method and application

A technology of blue phosphor and borate, which is applied in the field of bismuth-doped borate blue phosphor and its preparation, can solve problems such as low color rendering index, lack of red light, and hinder development, and achieve a simple synthesis method , Saving raw materials and low production cost

Active Publication Date: 2020-05-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among these systems, the main disadvantage of the combination of blue InGaN chip and YAG:Ce yellow phosphor is the lack of red light, resulting in low color rendering index (Ra7000K), which hinders Its development to a wider application field

Method used

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  • A kind of bismuth doped borate blue fluorescent powder and its preparation method and application
  • A kind of bismuth doped borate blue fluorescent powder and its preparation method and application
  • A kind of bismuth doped borate blue fluorescent powder and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Select barium carbonate, diyttrium trioxide, boric acid, and bismuth trioxide as starting compound raw materials, and weigh four kinds of compound raw materials respectively according to the stoichiometric ratio of each element, totally 6 groups, and the proportioning ratio is as follows:

[0035] (1) Ba:Y:B:Bi=2:4.99975:5:0.00025, corresponding to x=0.025%;

[0036] (2) Ba:Y:B:Bi=2:4.9995:5:0.0005, corresponding to x=0.05%;

[0037] (3) Ba:Y:B:Bi=2:4.99925:5:0.00075, corresponding to x=0.075%;

[0038] (4) Ba:Y:B:Bi=2:4.999:5:0.001, corresponding to x=0.1%;

[0039] (5) Ba:Y:B:Bi=2:4.9985:5:0.0015, corresponding to x=0.15%;

[0040] (6) Ba:Y:B:Bi=2:4.998:5:0.002, corresponding to x=0.2%;

[0041] After the mixture is ground and mixed evenly, it is loaded into a corundum crucible; the corundum crucible is placed in a corundum boat and placed in a high-temperature box-type electric furnace. Strictly control the heating rate and pre-burn at 450°C for 4h. Cool to room...

Embodiment 2

[0046] Select barium carbonate, diyttrium trioxide, boric acid, and bismuth nitrate as starting compound raw materials, according to the molar ratio of each element Ba:Y:B:Bi=2:4.999:5:0.01, corresponding to x=0.1%; weigh Four compound raw materials, the mixture is ground and mixed evenly, then put into a corundum crucible, put the crucible in a corundum boat, and put it into a high-temperature box-type electric furnace. Strictly control the heating rate and pre-burn at 500°C for 6h. Cool to room temperature, grind and mix; then calcinate at 1250°C for 12 hours, cool to room temperature with the furnace, and grind to obtain bismuth-doped borate blue fluorescent material. XRD pattern analysis shows that it is Ba 2 Y 5 B 5 o 17 crystal phase. The spectral properties of the fluorescent powder are similar to those of Example 1.

Embodiment 3

[0048] Select barium carbonate, diyttrium trioxide, boric acid, bismuth nitrate as starting compound raw materials, according to the molar ratio of each element Ba:Y:B:Bi=2:4.9985:5:0.0015, corresponding to x=0.15%; Four compound raw materials, the mixture is ground and mixed evenly, then put into a corundum crucible, put the crucible in a corundum boat, and put it into a high-temperature box-type electric furnace. Strictly control the heating rate and pre-burn at 450°C for 8h. Cool to room temperature, grind and mix; then calcinate at 1300°C for 8 hours, cool to room temperature with the furnace, and grind to obtain bismuth-doped borate blue fluorescent material. XRD pattern analysis shows that it is Ba 2 Y 5 B 5 o 17 crystal phase. The spectral properties of the fluorescent powder are similar to those of Example 1.

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Abstract

The invention discloses a bismuth doped borate blue fluorescent powder. The chemical composition formula of the bismuth doped borate blue fluorescent powder is Ba2Y5(1-x)B5O17:xBi3+, wherein x is molar fraction, which is higher than or equal to 0.025 and equal to or lower than 0.002. The invention also discloses a preparation method of the bismuth doped borate blue fluorescent powder. The preparation method of the bismuth doped borate blue fluorescent powder comprises the following steps of (1) according to the chemical composition formula, weighing out and uniformly grinding and mixing barium-containing compound raw materials, yttrium-containing compound raw materials, boron-containing compound raw materials and bismuth-containing compound raw materials; (2) pre-sintering the mixture at 400-600 DEG C, then cooling down to room temperature and performing uniform grinding and mixing; (3) sintering the mixture at 1100-1300 DEG C, furnace-cooling down to room temperature and performing grinding to obtain a required sample. The invention meanwhile discloses application of the bismuth doped borate blue fluorescent powder. The bismuth doped borate blue fluorescent powder has absorbability in ultraviolet region, no absorbability in visible region, and emission in blue region, achieves adjustability between excitation and emission, and meanwhile, can meet the requirements on blue lightemission under ultraviolet excitation.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a bismuth-doped borate blue fluorescent powder and a preparation method and application thereof. Background technique [0002] With the continuous development of society, people are satisfied with the achievements of science and technology on the one hand, and gradually become aware of climate change and the environment on the other hand. People in the new era not only demand faster and better development, but also firmly hold the important concept of sustainable development. In recent years, scientists have been looking for new clean energy sources that can replace fossil fuels without emitting carbon dioxide, including solar energy, wind energy, tidal energy, and biomass. The discovery of the source of fire was an important impetus for human beings to gradually evolve from primitive to civilized. Since then, human beings have been able to walk in the dark for the first tim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78H01L33/50
CPCC09K11/7712H01L33/504Y02B20/00
Inventor 彭明营王嘉
Owner SOUTH CHINA UNIV OF TECH
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