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Near ultraviolet excited red fluorescent powder and preparation method thereof

A red fluorescent powder and near-ultraviolet technology, applied in the field of fluorescent powder, can solve the problems of inability to synthesize a single white light and low color rendering index, and achieve the effects of promoting the growth of crops, good chemical stability, and simple preparation methods

Inactive Publication Date: 2017-05-31
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a near-ultraviolet-excited red light with good chemical stability and high excitation efficiency in view of the problems in the prior art that the red light component of the emission spectrum is low so that its color rendering index is low, and a single white light cannot be synthesized. Phosphor powder and its preparation method

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  • Near ultraviolet excited red fluorescent powder and preparation method thereof
  • Near ultraviolet excited red fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Li 2.97 AlB 2 o 6 :0.03Eu 3+ Phosphor powder

[0027] Take analytically pure lithium carbonate Li 2 CO 3 , aluminum oxide Al 2 o 3 , boric acid H 3 BO 3 And europium oxide Eu with purity ≥99.99% 2 o 3 The raw materials are prepared according to the chemical formula ratio, and the raw material ratio is shown in Table 1.

[0028] Table 1

[0029] raw material Li 2 CO 3

Al 2 o 3

h 3 BO 3

Eu 2 o 3

mass (g) 0.5486 0.2549 0.6183 0.0264

[0030] Accurately weigh the above raw materials, fully grind them in an agate crucible for 20 minutes, mix them evenly and put them into a ceramic crucible.

[0031] Put the sample into the high-temperature solid-phase furnace according to the set program, first rise from room temperature to 350°C for 60 minutes after 60 minutes, and then rise to 730°C for 3 hours after 90 minutes. After the calcination process is over, cool the sample to room temperature with the furnace and...

Embodiment 2

[0034] Li 2.95 AlB 2 o 6 :0.05Eu 3+ Phosphor powder

[0035] Take analytically pure lithium carbonate Li 2 CO 3 , aluminum oxide Al 2 o 3 , boric acid H 3 BO 3 And europium oxide Eu with purity ≥99.99% 2 o 3 The raw materials are prepared according to the chemical formula ratio, and the raw material ratio is shown in Table 2.

[0036] Table 2

[0037] raw material Li 2 CO 3

al 2 o 3

h 3 BO 3

Eu 2 o 3

mass (g) 0.545 0.2549 0.6183 0.0440

[0038] Accurately weigh the above raw materials, fully grind them in an agate crucible for 20 minutes, mix them evenly and put them into a ceramic crucible.

[0039] Put the sample into the high-temperature solid-phase furnace according to the set program, first rise from room temperature to 350°C for 60 minutes after 60 minutes, and then rise to 730°C for 3 hours after 90 minutes. After the calcination process is over, cool the sample to room temperature with the furnace and ...

Embodiment 3

[0042] Li 2.93 AlB 2 o 6 :0.07Eu 3+ Phosphor powder

[0043] Take analytically pure lithium carbonate Li 2 CO 3 , aluminum oxide Al 2 o 3 , boric acid H3 BO 3 And europium oxide Eu with purity ≥99.99% 2 o 3 The raw materials are prepared according to the chemical formula ratio, and the raw material ratio is shown in Table 3.

[0044] table 3

[0045] raw material Li 2 CO 3

al 2 o 3

h 3 BO 3

Eu 2 o 3

mass (g) 0.5413 0.2549 0.6183 0.0616

[0046] Accurately weigh the above raw materials, fully grind them in an agate crucible for 20 minutes, mix them evenly and put them into a ceramic crucible.

[0047] Put the sample into the high-temperature solid-phase furnace according to the set program, first rise from room temperature to 350°C for 60 minutes after 60 minutes, and then rise to 730°C for 3 hours after 90 minutes. After the calcination process is over, cool the sample to room temperature with the furnace and t...

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Abstract

The invention provides near ultraviolet excited red fluorescent powder and a preparation method thereof, and relates to fluorescent power. The general chemical formula of the near ultraviolet excited red fluorescent powder is Li<3-x>AlB2O6:xEu<3+>, wherein the Li3AlB2O6 aluminoborate is used as a luminous substrate; Eu<3+> is used as a doping rare earth luminous center; x is greater than 0 but smaller than or equal to 0.30. According to the preparation method, the raw materials are weighed according to the stoichiometric proportion of the general chemical formula of Li<3-x>AlB2O6:xEu<3+>; lithium carbonate, boracic acid, aluminium oxide and rare earth oxides are ground and mixed to obtain a mixture; the mixture is heated and calcined; after grinding, the near ultraviolet excited red fluorescent powder is obtained. The preparation method is simple; the operation is easy; no pollution is caused; the cost is low. The near ultraviolet excited red fluorescent powder can be applied to three-base-color white-light LED (light emitting diode) fluorescent powder, lower conversion solar battery fluorescent powder and various display devices, and can also be used as crop growth promoting agricultural films of near ultraviolet excited lower conversion fluorescent materials.

Description

technical field [0001] The invention relates to fluorescent powder, in particular to a near-ultraviolet excited red fluorescent powder and a preparation method thereof. Background technique [0002] White LED is the fourth-generation lighting electric light source after incandescent lamps, fluorescent lamps and energy-saving lamps. High speed, low working voltage and good safety, it is called a new generation of solid-state lighting and has attracted much attention. It has quickly entered the fields of night lighting, indoor lighting, automobiles, and personal communication equipment. This new type of green light source must be a new generation of lighting source, which has extensive and far-reaching significance for energy saving, environmental protection, and providing people's quality of life. [0003] White light LEDs currently on the market use 465nm blue light to excite YAG: Ce 3+ Phosphor powder emits yellow light, and then synthesizes blue light and yellow light in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64H01L33/50
CPCC09K11/774H01L33/502H01L2933/0041Y02B20/00
Inventor 郑淞生李震郑将辉
Owner XIAMEN UNIV