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Bi3+/Eu3+ co-activated lutetium acid salt fluorescent powder and preparation method thereof

A phosphor and lutetate technology, which is applied in the field of lutetate-based phosphor and its preparation, achieves the effect of meeting LED packaging requirements, good thermal stability, and high controllability

Pending Publication Date: 2021-06-11
SHENYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the Eu 3+ The problem of ionic single-activated phosphors, providing a Bi 3+ 、Eu 3+ Ion co-doped lutetate phosphor and preparation method thereof

Method used

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  • Bi3+/Eu3+ co-activated lutetium acid salt fluorescent powder and preparation method thereof
  • Bi3+/Eu3+ co-activated lutetium acid salt fluorescent powder and preparation method thereof
  • Bi3+/Eu3+ co-activated lutetium acid salt fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of Ba 3 Lu 3.88 Bi 0.08 Eu 0.04 o 9 Phosphor powder, the specific steps are as follows:

[0035] with BaCO 3 、Lu 2 o 3 、 Bi 2 o 3 、Eu 2 o 3 As the raw material, weigh the raw material according to the molar mass ratio of Ba:Lu:Bi:Eu is 3:3.88:0.08:0.04, put the above raw material in an agate mortar and grind it for 60 minutes, add volatile anhydrous Ethanol or acetone solvent to improve the grinding quality and promote particle refinement, which is conducive to the full reaction between raw materials during calcination. The fully ground and mixed raw materials were transferred to a corundum crucible, sintered at 1550°C for 5 hours under normal pressure and air atmosphere, and cooled naturally to room temperature to obtain a sintered product. The sintered product was crushed in an agate mortar, ground evenly, sieved, washed and dried to obtain Ba 3 Lu 3.88 Bi 0.08 Eu 0.04 o 9 Phosphor.

[0036] For the XRD spectrum of the fluorescent powder ...

Embodiment 2

[0040] Preparation of Ba 3 Lu 3.84 Bi 0.08 Eu 0.08 o 9 Phosphor powder, the preparation method and luminous performance of the phosphor powder are basically the same as in Example 1, and the specific steps are briefly described as follows:

[0041] with BaCO 3 、Lu 2 o 3 、 Bi 2 o 3 、Eu 2 o 3 As the raw material, weigh the raw material according to the molar mass ratio of Ba:Lu:Bi:Eu is 3:3.84:0.08:0.08, put the above raw material in an agate mortar and grind it for 60 minutes, add volatile anhydrous Ethanol or acetone solvent to improve the grinding quality and promote particle refinement, transfer the fully ground and mixed raw materials to a corundum crucible, sinter at 1550 ℃ for 5 hours under normal pressure and air atmosphere, and naturally cool to room temperature to obtain a sintered product . The sintered product was crushed in an agate mortar, ground evenly, sieved, washed and dried to obtain Ba 3 Lu 3.84 Bi 0.08 Eu 0.08 o 9 Phosphor. For the XRD spec...

Embodiment 3

[0045] Preparation of Ba 3 Lu 3.76 Bi 0.08 Eu 0.16 o 9 Phosphor powder, the preparation method and luminous performance of the phosphor powder are basically the same as in Example 1, and the specific steps are briefly described as follows:

[0046] with BaCO 3 、Lu 2 o 3 、 Bi 2 o 3 、Eu 2 o 3 As the raw material, weigh the raw material according to the molar mass ratio of Ba:Lu:Bi:Eu is 3:3.76:0.08:0.16, put the above raw material in an agate mortar and grind for 60 minutes, add volatile anhydrous Ethanol or acetone solvent to improve the grinding quality and promote particle refinement, transfer the fully ground and mixed raw materials to a corundum crucible, sinter at 1550 ℃ for 5 hours under normal pressure and air atmosphere, and naturally cool to room temperature to obtain a sintered product . The sintered product was crushed in an agate mortar, ground evenly, sieved, washed and dried to obtain Ba 3 Lu 3.76 Bi 0.08 Eu 0.16 o 9 Phosphor. For the XRD spectru...

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Abstract

The invention discloses a preparation method of Bi3+ / Eu3+ co-doped lutecium acid salt-based fluorescent powder and the prepared fluorescent powder. The general chemical formula of the fluorescent powder is Ba3Lu4(0.98-y)O9:0.08Bi3+,4yEu3+ (0 < = y < = 0.08), wherein the preparation method is a high-temperature solid-phase method, namely, raw materials are mixed according to the stoichiometric ratio and sintered for 5 hours at the temperature of 1550 DEG C under the normal pressure and air atmosphere, and finally the sintered product is crushed to obtain the fluorescent powder material. The preparation process is simple, and parameters are easy to regulate and control. The fluorescent powder can be excited by ultraviolet light or near ultraviolet light, the excitation spectrum range is wide, the luminous intensity is high, the thermal stability is good, the luminous color of the fluorescent powder can be adjusted from a yellow-green light area to an orange light area along with the increase of the doping concentration of Eu3+ ions, different luminous requirements can be met, and the fluorescent powder has the application potential in the aspect of LEDs.

Description

technical field [0001] The invention relates to a lutetium-based fluorescent powder and a preparation method thereof, in particular to a Bi 3+ 、Eu 3+ The co-activated fluorescent powder with adjustable light color and its preparation method belong to the technical field of rare earth luminescent materials and its preparation. Background technique [0002] Ultraviolet light-emitting diodes have achieved rapid development in the field of solid-state lighting in recent years because their efficiency in practical applications is superior to traditional incandescent and fluorescent lamps. Existing commercial YAG:Ce 3+ Phosphor-converted white LEDs have problems such as low color rendering index (CRI) and high correlated color temperature (CCT), which limit their application in many fields, especially indoor lighting. At the same time, the research and development of near-ultraviolet-excited trichromatic phosphors is constantly advancing, and is expected to gradually replace YA...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78H01L33/50
CPCC09K11/7783H01L33/502
Inventor 王梓垚栾雪竹马国峰
Owner SHENYANG UNIV
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