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Method for preparing blue aluminate fluorescence powder via sol self-combustion method

A technology of blue fluorescent powder and self-combustion method, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of complex process, time-consuming and energy consumption, etc., and achieve the effect of simple process, uniform distribution and low synthesis temperature

Inactive Publication Date: 2014-06-11
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is complex and requires calcination at 900°C to 1400°C for 1 to 4 hours, which is time-consuming and energy-consuming.

Method used

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  • Method for preparing blue aluminate fluorescence powder via sol self-combustion method
  • Method for preparing blue aluminate fluorescence powder via sol self-combustion method
  • Method for preparing blue aluminate fluorescence powder via sol self-combustion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Accurately weigh 7.5027g Al(NO 3 ) 3 9H 2 O, 0.3852g Sr(NO 3 ) 2 , 0.5128gMg (NO 3 ) 2 ·6H 2 O, 0.0320g Eu 2 o 3 and 0.0115g MnCO 3 . Then press nitrate [Al(NO 3 ) 3 9H 2 O, Sr(NO 3 ) 2 and Mg(NO 3 ) 2 ·6H 2 The amount of the total substance of the three]: urea is the urea added by weighing the molar ratio of 1:1.5, according to nitrate [Al(NO 3 ) 3 9H 2 O, Sr(NO 3 ) 2 and Mg(NO 3 ) 2 ·6H 2 The amount of the total substance of the three]: boric acid is the boric acid added by weighing the mol ratio of 100:1, by every mole of Al (NO 3 ) 3 9H 2 Add concentrated nitric acid in the amount of 50ml of O, that is, Al(NO 3 ) 3 9H 2 O is 0.02 mol, and the nitric acid in the added concentrated nitric acid is 0.015 mol, according to each mole of Al(NO 3 ) 3 9H 2 O is the amount that 150ml adds dehydrated alcohol, namely Al(NO 3 ) 3 9H 2 O is 0.02mol, and the absolute ethanol added is 0.05138mol.

[0030] Will Eu 2 o 3 , MnCO 3 Dissolve in co...

Embodiment 2

[0032] Accurately weigh 7.5027g Al(NO 3 ) 3 9H 2 O, 0.3852gSr(NO 3 ) 2 , 0.5128gMg (NO 3 ) 2 ·6H 2 O, 0.0320g Eu 2 o 3 and 0.0161g MnCO 3 ; Press nitrate [Al(NO 3 ) 3 9H 2 O, Sr(NO 3 ) 2 and Mg(NO 3 ) 2 ·6H 2 The amount of the total substance of the three]: urea is the urea added by weighing the molar ratio of 1:1.5, according to nitrate [Al(NO 3 ) 3 9H 2 O, Sr(NO 3 ) 2 and Mg(NO 3 ) 2 ·6H 2 The amount of the total substance of the three]: boric acid is the boric acid added by weighing the mol ratio of 100:1, by every mole of Al (NO 3 ) 3 9H 2 Add concentrated nitric acid in the amount of 50ml of O, that is, Al(NO 3 ) 3 9H 2 O is 0.02 mol, and the nitric acid in the added concentrated nitric acid is 0.015 mol, according to each mole of Al(NO 3 ) 3 9H 2 O is the amount that 150ml adds dehydrated alcohol, namely Al(NO 3 ) 3 9H 2 O is 0.02mol, and the absolute ethanol added is 0.05138mol.

[0033] Will Eu 2 o 3 , MnCO 3 Dissolve in concentra...

Embodiment 3

[0035] Accurately weigh 7.5027g Al(NO 3 ) 3 9H 2 O, 0.42326g Sr(NO 3 ) 2 , 0.5128gMg (NO 3 ) 2 ·6H 2 O, 0.0115g MnCO 3 ; Press nitrate [Al(NO 3 ) 3 9H 2 O, Sr(NO 3 ) 2 and Mg(NO 3 ) 2 ·6H 2The amount of the total substance of the three]: urea is the urea added by weighing the molar ratio of 1:1.5, according to nitrate [Al(NO 3 ) 3 9H 2 O, Sr(NO 3 ) 2 and Mg(NO 3 ) 2 ·6H 2 The amount of the total substance of the three]: boric acid is the boric acid added by weighing the mol ratio of 100:1, by every mole of Al (NO 3 ) 3 9H 2 Add concentrated nitric acid in the amount of 50ml of O, that is, Al(NO 3 ) 3 9H 2 O is 0.02 mol, and the nitric acid in the added concentrated nitric acid is 0.015 mol, according to each mole of Al(NO 3 ) 3 9H 2 O is the amount that 150ml adds dehydrated alcohol, namely Al(NO 3 ) 3 9H 2 O is 0.02mol, and the absolute ethanol added is 0.05138mol.

[0036] MnCO 3 Dissolve in concentrated nitric acid to obtain a transparent ...

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Abstract

The invention discloses a method for preparing blue aluminate fluorescence powder via a sol self-combustion method. The method comprises the following steps: dissolving one or more than two of Eu2O3, MnCO3 and Er2O3 in 14mol / L to 16mol / L concentrated nitric acid and adding ethyl alcohol so as to obtain a clear solution; adding an aluminum nitrate salt, a strontium nitrate salt and a magnesium nitrate salt into the clear solution and further adding boric acid and urea so as to form a mixed solution; heating the mixed solution for 0.6 to 1.2 hours at a constant temperature of 80 DEG C to 100DEG C so as to obtain a yellow sol; carrying out a combustion reaction on the yellow sol for 1 to 3 minutes at 400 DEG C to 800 DEG C and carrying out heat preservation for 2 to 30 minutes; and then taking out, cooling and grinding so as to obtain the blue aluminate fluorescence powder. The method is simple in process, pollution-free, low in synthetic temperature, short in reaction time, low in cost, less in energy consumption and high in quenching concentration. The blue aluminate fluorescence powder has a good luminescent intensity and can be favorably applied to an LED (Light Emitting Diode) light source capable of emitting white light.

Description

technical field [0001] The invention relates to the field of phosphor preparation, in particular to a method for preparing aluminate blue phosphor by sol self-combustion. Background technique [0002] White light-emitting diode (Light Emitting Diode, LED), as a new type of solid light source, has many advantages such as energy saving, environmental protection, long life, small size, etc. It shows great application prospects in indoor lighting, liquid crystal display and backlight. Currently, the most mature phosphor used in white LED products is YAG:Ce 3+ , coated on the InGaN blue chip emitting 460nm wavelength, the blue light emitted by the InGaN blue chip excites YAG:Ce 3+ Phosphor powder emits yellow light, and blue light and yellow light mix to form white light. However, due to the lack of red light radiation, the product has disadvantages such as low color rendering index and poor color reproduction, so its application and promotion in the field of high-end lighting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64
Inventor 王乐李旸晖张宏刘丹徐国堂陈如标罗东
Owner CHINA JILIANG UNIV
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