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Europium doped borate red phosphor powder and preparing method thereof

A red phosphor and borate technology, applied in the field of phosphors, can solve the problems of insufficient intensity of blue-violet light and red-orange light, affecting the photosynthetic rate of plants, etc., and achieve the effects of low cost, simple preparation method and mild preparation conditions.

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

Plants have to accept the harmful spectrum that is not conducive to their growth while photosynthesizing; on the other hand, the blue-violet and red-orange light intensity that is beneficial to plant growth is insufficient, which affects the photosynthetic rate of plants

Method used

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  • Europium doped borate red phosphor powder and preparing method thereof
  • Europium doped borate red phosphor powder and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: SrBi 2 B 2 o 7 Phosphor powder

[0024] Take analytically pure strontium carbonate SrCO 3 , bismuth oxide Bi 2 o 3 , boric acid H 3 BO 3 The raw materials are prepared according to the chemical formula ratio, and the raw material ratio is shown in Table 1.

[0025] Table 1

[0026] raw material SrCO 3

Bi 2 o 3

h 3 BO 3

mass (g) 0.3691 1.165 0.3092

[0027] Accurately weigh the above raw materials, fully grind them in an agate crucible, mix them evenly, and put them into a ceramic crucible.

[0028] Put the sample into the muffle furnace according to the set procedure, first rise from room temperature to 350°C for 60 minutes after 60 minutes, and then rise to 730°C for 3 hours after 180 minutes.

[0029] After taking it out, grind it into powder with an agate crucible to get SrBi 2 B 2 o 7 Material.

[0030] The XRD figure of embodiment 1 and standard PDF card refer to figure 1 .

Embodiment 2

[0031] Example 2: SrBi 1.97 B 2 o 7 : 0.03Eu 3+ Phosphor powder

[0032] Take analytically pure strontium carbonate SrCO 3 , bismuth oxide Bi 2 o 3 , boric acid H 3 BO 3 and europium oxide Eu 2 o 3 The raw materials are prepared according to the chemical formula ratio, and the raw material ratio is shown in Table 2.

[0033] Table 2

[0034] raw material SrCO 3

Bi 2 o 3

h 3 BO 3

Eu 2 o 3

mass (g) 0.3691 1.1475 0.3092 0.0132

[0035] Accurately weigh the above raw materials, fully grind them in an agate crucible, mix them evenly, and put them into a ceramic crucible.

[0036] Put the sample into the muffle furnace according to the set procedure, first rise from room temperature to 350°C for 60 minutes after 60 minutes, and then rise to 730°C for 3 hours after 180 minutes.

[0037] After taking it out, grind it into powder with an agate crucible to get SrBi 1.97 B 2 o 7 : 0.03Eu 3+ phosphor material.

Embodiment 3

[0038] Example 3: SrBi 1.95 B 2 o 7 : 0.05Eu 3+ Phosphor powder

[0039] Take analytically pure strontium carbonate SrCO 3 , bismuth oxide Bi 2 o 3 , boric acid H 3 BO 3 and europium oxide Eu 2 o 3 The raw materials are prepared according to the chemical formula ratio, and the raw material ratio is shown in Table 3.

[0040] table 3

[0041] raw material SrCO 3

Bi 2 o 3

h 3 BO 3

Eu 2 o 3

mass (g) 0.3691 1.1359 0.3092 0.022

[0042] Accurately weigh the above raw materials, fully grind them in an agate crucible, mix them evenly, and put them into a ceramic crucible.

[0043] Put the sample into the muffle furnace according to the set procedure, first rise from room temperature to 350°C for 60 minutes after 60 minutes, and then rise to 730°C for 3 hours after 180 minutes.

[0044] After taking it out, grind it into powder with an agate crucible to get SrBi 1.95 B 2 o 7 : 0.05Eu 3+ phosphor material.

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Abstract

An Eeuropium doped borate red phosphor powder and a preparing method thereof relates to a phosphor powder. The chemical general formula of the europium doped borate red phosphor powder is SrBI2-xB2O7: xEu3+, wherein SrBI2-xB2O7 borate is a luminescence base material, Eu is doped rare earth luminescence center, and 0<x is greater than zero and no more than 0.25. The preparing method comprises: weighing raw materials, according to stoichiometric ratios of the chemical general formula of SrBI2-xB2O7: xEu3+, of strontium carbonate, boric acid, bismuth oxide, and europium oxide for grinding and mixing to obtain a mixture; and heating, calcining, and grinding same to obtain the europium doped borate red phosphor powder. It has good chemical stability, high excitation efficiency, and can be excited by near ultraviolet and blue light at the same time. The method is easy to operate without pollution, and has a low cost. The invention can be applied to red powder in LED trichromatic phosphor powder, down-conversion solar cell phosphor powder and various display devices, and can further be applied as a down-conversion phosphor material excited by the near ultraviolet to an agricultural film that accelerates growth of crops.

Description

technical field [0001] The invention relates to fluorescent powder, in particular to a borate red fluorescent powder doped with europium and a preparation method thereof. Background technique [0002] With the prevalence of global energy conservation and emission reduction, environmental protection and energy conservation have become hot spots in the market, and the LED industry has also begun to heat up. At the same time, my country's LED industry has experienced more than 30 years of development. As a new generation of solid-state lighting, white LED has extensive and far-reaching significance to people's quality of life in the fields of personal communication equipment, night lighting, indoor lighting, and automobiles because of its energy saving, high efficiency, long life and environmental protection. [0003] At present, commercial white light LEDs are mainly made of YAG:Ce which emits yellow light. 3+ , a phosphor-converted white LED combined with a GaN die that emit...

Claims

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Application Information

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IPC IPC(8): C09K11/74H01L33/50
CPCC09K11/774H01L33/502H01L2933/0041
Inventor 郑淞生李震骈琪麟李莉郑将辉
Owner XIAMEN UNIV