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Method for preparing Tb<3+> and Eu<3+> double-doped single-matrix K3La(PO4)2 fluorescent powder

A phosphor and single-matrix technology, applied in the field of preparing Tb3+, can solve problems such as poor color rendering, low efficiency, and color shift

Inactive Publication Date: 2020-06-02
启东茂材实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method still has many shortcomings to be resolved, such as poor reproducibility, color shift, low efficiency, poor color rendering, and high color temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A preparation of Tb 3+ , Eu 3+ Double-doped single-matrix K 3 La(PO 4 ) 2 The method for fluorescent powder, comprises the steps: with 20 parts of K 2 CO 3 , 10 parts La 2 o 3 , 25 parts (NH 4 ) 2 HPO 4 , 3 parts Tb 4 o 7 and 4 Eu 2 o 3 Put it into an agate mortar, grind it thoroughly for 45 minutes, transfer the ground powder to an alumina crucible, place it in a muffle furnace and pre-fire it at 590°C for 6 hours, then sinter it at 1030°C for 6 hours, and cool the sample to room temperature , to be obtained after grinding; each raw material is in parts by weight.

Embodiment 2

[0015] A preparation of Tb 3+ , Eu 3+ Double-doped single-matrix K 3 La(PO 4 ) 2 The method for fluorescent powder, comprises the steps: with 15 parts of K 2 CO 3 , 9 parts of La 2 o 3 , 20 parts (NH 4 ) 2 HPO 4 , 2 parts Tb 4 o 7 and 3 Eu 2 o 3 Put it into an agate mortar, grind it fully for 40 minutes, transfer the ground powder to an alumina crucible, place it in a muffle furnace and pre-fire it at 585°C for 5.5h, then sinter it at 1020°C for 5.5h, and cool the sample After reaching room temperature, it is obtained by grinding; all raw materials are in parts by weight.

Embodiment 3

[0017] A preparation of Tb 3+ , Eu 3+ Double-doped single-matrix K 3 La(PO 4 ) 2 The method for fluorescent powder, comprises the steps: with 25 parts of K 2 CO 3 , 11 parts La 2 o 3 , 30 parts (NH 4 ) 2 HPO 4 , 4 parts Tb 4 o 7 and 5 Eu 2 o 3 Put it into an agate mortar, grind it thoroughly for 50 minutes, transfer the ground powder to an alumina crucible, place it in a muffle furnace and pre-fire it at 595°C for 6.5h, then sinter it at 1040°C for 6.5h, and cool the sample After reaching room temperature, it is obtained by grinding; all raw materials are in parts by weight.

[0018] The method is simple, quick and easy to operate, and the prepared Tb 3+ , Eu 3+ Double-doped single-matrix K 3 La(PO 4 ) 2 Color-tunable phosphors that enable multicolor emission from single-phase phosphors.

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PUM

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Abstract

The invention discloses a method for preparing Tb<3+> and Eu<3+> double-doped single-matrix K3La(PO4)2 fluorescent powder. The method comprises the following steps: placing K2CO3, La2O3, (NH4)2HPO4, Tb4O7 and Eu2O3 into an agate mortar, fully grinding for 40-50 minutes, transferring the ground powder into an aluminum oxide crucible, putting into a muffle furnace, pre-firing for 5.5-6.5 hours at atemperature of 585-595 DEG C, then sintering for 5.5-6.5 hours at a temperature of 1020-1040 DEG C, cooling a sample to room temperature, and grinding to obtain the product. The method is simple, convenient, quick and easy to operate, and the prepared Tb<3+> and Eu<3+> double-doped single-matrix K3La(PO4)2 color-adjustable fluorescent powder can realize multicolor emission of single-phase fluorescent powder.

Description

technical field [0001] The present invention relates to a kind of preparation Tb 3+ , Eu 3+ Double-doped single-matrix K 3 La(PO 4 ) 2 phosphor method. Background technique [0002] White LED is a solid-state device with many advantages such as energy saving, long life, environmental protection, fast response, and recyclability. It meets the dual requirements of green, energy saving, and environmental protection, and is known as the most valuable lighting source for new green lighting in the 21st century. It is well known that the most common method for synthesizing white light is a blue-emitting InGaN chip combined with a yellow phosphor Y 3 Al 5 o 5 : Ce 3+ (YAG: Ce 3+ ) combined. However, this method still has many shortcomings to be resolved, such as poor reproducibility, color shift, low efficiency, poor color rendering, and high color temperature. To solve these problems, white LEDs have been improved to excite three primary color phosphors (blue, green and...

Claims

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Application Information

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IPC IPC(8): C09K11/81
CPCC09K11/7795
Inventor 不公告发明人
Owner 启东茂材实业有限公司
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