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a kind of eu 2+ Activated aluminophosphate blue luminescent phosphor and preparation method thereof

A technology of aluminophosphate and fluorescent powder, which is applied in the field of inorganic fluorescent materials and displays, to achieve the effects of low preparation temperature, uniform particle size, and no waste water and waste gas discharge

Active Publication Date: 2020-05-05
CHANGZHOU VOCATIONAL INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent relates to a europium ion Eu 2+ Activated nano-aluminophosphate blue light-emitting phosphor, literature research shows that this kind of nano-blue light-emitting phosphor has not been reported before

Method used

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  • a kind of eu <sup>2+</sup> Activated aluminophosphate blue luminescent phosphor and preparation method thereof
  • a kind of eu <sup>2+</sup> Activated aluminophosphate blue luminescent phosphor and preparation method thereof
  • a kind of eu <sup>2+</sup> Activated aluminophosphate blue luminescent phosphor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] According to the chemical formula Cs 1.98 Eu 0.02 AlP 3 o 10 The stoichiometric ratio of each element in the formula is weighed separately: cesium nitrate CsNO 3 : 1.2864 g, europium oxide Eu 2 o 3 : 0.0117 grams, aluminum nitrate Al (NO 3 ) 3 9H 2 O: 1.2504 g, sodium dihydrogen phosphate NaH 2 PO 4 2H 2 O: 1.5601 g, cesium nitrate CsNO 3 Dissolve in deionized water, add 0.8914 g of oxalic acid, stir until completely transparent; Europium oxide Eu 2 o 3 Dissolve in dilute nitric acid, add 0.0045 g of oxalic acid, stir until completely transparent; aluminum nitrate Al(NO 3 ) 3 9H 2 O was dissolved in deionized water, 0.4502 g of oxalic acid was added, and sodium dihydrogen phosphate NaH 2 PO 4 2H 2 O was dissolved in deionized water, 1.3506 g of oxalic acid was added, and stirred until completely transparent to form a transparent sol.

[0039] Mix the above solutions, stir for 5 hours at a temperature of 65°C, let stand for a period of time, and then s...

Embodiment 2

[0046] According to the chemical formula Cs 1.96 Eu 0.04 AlP 3 o 10 The stoichiometric ratio of each element in the formula is weighed respectively: cesium chloride CsCl: 1.1000 grams, europium nitrate Eu(NO3) 3 6H2O: 0.0595 grams, aluminum chloride AlCl3: 0.4445 grams, ammonium dihydrogen phosphate NH 4 h 2 PO 4 : 1.1503 grams, dissolving cesium chloride CsCl in deionized water, adding 0.8824 grams of oxalic acid, stirring until completely transparent; europium nitrate Eu (NO 3 ) 3 ·6H 2 O was dissolved in deionized water, added 0.0180 g of oxalic acid, stirred until completely transparent; aluminum chloride AlCl 3 Dissolve in deionized water, add 0.4502 g of oxalic acid, sodium dihydrogen phosphate NaH 2 PO 4 2H 2 O was dissolved in deionized water, 1.3506 g of oxalic acid was added, and stirred until completely transparent to form a transparent sol.

[0047] Mix the above solutions, stir for 5 hours at a temperature of 70°C, let stand for a period of time, and th...

Embodiment 3

[0050] According to the chemical formula Cs 1.92 Eu 0.08 AlP 3 o 10 The stoichiometric ratio of each element in , respectively weigh cesium nitrate CsNO 3 : 1.2474 g, europium nitrate Eu(NO 3 ) 3 ·6H 2 O: 0.1189 g, aluminum chloride AlCl 3 : 0.44445 g, ammonium dihydrogen phosphate NH 4 h 2 PO 4 : 1.5601 g, cesium nitrate CsNO 3 Dissolve in deionized water, add 0.8644 g of oxalic acid, stir until completely transparent; Europium nitrate Eu(NO 3 ) 3 ·6H 2 O was dissolved in deionized water, added 0.0360 g of oxalic acid, stirred until completely transparent; aluminum chloride AlCl 3 Dissolve in deionized water, add 0.4502 g of oxalic acid, sodium dihydrogen phosphate NaH 2 PO 4 2H 2 O was dissolved in deionized water, 1.3506 g of oxalic acid was added, and stirred until completely transparent to form a transparent sol.

[0051] Mix the above solutions, stir for 4 hours at a temperature of 65°C, let stand for a period of time, and then slowly dry them in an oven...

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Abstract

The invention discloses Eu<2+>-activated aluminophosphate blue luminous fluorescent powder and a preparation method thereof. The general chemical formula of the aluminophosphate blue luminous fluorescent powder is Cs<2-2x>Eu<2x>AlP<3>O<10>, wherein x is the molar ratio of Cs<+> ions replaced with divalent europium ions Eu<2+>; and the value range is that x is smaller than 0.08 and greater than 0.01. The fluorescent powder is used for emitting blue light of which the main wavelength is 450nm under ultraviolet excitation. The pure-phase blue fluorescent powder with excellent luminous property is obtained by adopting a sol-gel method, the fluorescent powder is used for emitting bright blue light under the ultraviolet excitation, and the fluorescent powder is high in luminous intensity and good in stability and color rendering property.

Description

technical field [0001] The invention belongs to the technical field of inorganic fluorescent materials and displays, in particular to a nano-aluminophosphate blue luminescent phosphor activated by europium ions Eu2+ and a preparation method thereof. Background technique [0002] As the next generation of solid-state lighting, white LEDs have attracted much attention due to their advantages such as low power consumption, high efficiency, small size, low maintenance, and mercury-free. White LEDs have been widely used as backlights for electronic devices, and their marked improvements in efficiency and color rendering are expected to replace conventional fluorescent lamps for general lighting. The most common white LED is a combination of blue InGaN chip and Y 3 al 5 o 12 : Ce 3+ (YAG:Ce 3+ ) obtained from yellow phosphor powder. However, this type of white light suffers from poor coloration due to insufficient color in the red and cyan regions. An effective way to solve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/81
CPCC09K11/7709
Inventor 唐惠东杨蓉
Owner CHANGZHOU VOCATIONAL INST OF ENG