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Monoclinic-system-structured superfine white nano fluorescent powder and preparation method thereof

A nano-phosphor, monoclinic technology, applied in the field of phosphors, can solve problems such as unfavorable industrial production, cumbersome operation steps, and difficulty in ensuring quality, and achieve bright colors, simple and controllable processes, and good thermal stability.

Inactive Publication Date: 2016-07-13
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the preparation process, the consumption time is too long, the operation steps are cumbersome, it is difficult to guarantee the quality in large-scale production, and the synthesis temperature is high, which needs to be calcined at 800-1600 ° C, which is not conducive to industrial production.

Method used

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  • Monoclinic-system-structured superfine white nano fluorescent powder and preparation method thereof
  • Monoclinic-system-structured superfine white nano fluorescent powder and preparation method thereof
  • Monoclinic-system-structured superfine white nano fluorescent powder and preparation method thereof

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preparation example Construction

[0033] In addition, the preparation method of the ultrafine white nano phosphor powder with monoclinic crystal structure comprises the following steps:

[0034] (1) According to Y 2 Si 1-x Eu x o 5 The stoichiometric ratio of each element in , respectively take the corresponding Na2 SiO 3 ·5H 2 O, Eu(NO 3 ) 3 ·6H 2 O, Y (NO 3 ) 3 ·6H 2 O was dissolved in 100mL water to obtain a mixed solution;

[0035] (2) Add the mixed solution obtained in the above step (1) into the deionized aqueous solution of glycine dissolved in advance, keep the temperature at 60° C., and stir for at least 1 hour;

[0036] (3) Combust and condense the mixed solution of the above step (2) at 120°C, add a lubricant, the amount of the lubricant added is limited to be kept dispersed by the ball milling system, and then grind and dry to obtain the precursor powder;

[0037] (4) Put the precursor powder obtained in the above step (3) directly into a graphite crucible for calcination at a calcinati...

Embodiment 1

[0046] 0.22 g of europium nitrate, 7.66 g of yttrium nitrate and 2.70 g of sodium silicate were dissolved in 100 ml of water and stirred to obtain solution 1. Dissolve 3.08g of glycine into 50ml of water to obtain solution 2, pour solution 1 into solution 2, stir at 60°C until clear solution 3, and stir for 1.5 hours at a speed of 80 to 100 rpm by ultrasonic oscillation , and then concentrated and burned at 120°C to obtain the precursor powder. And the precursor powder was calcined at 800°C for 4 hours, the heating rate was 15°C / min, and then ground for 1 hour, and then followed the remaining specific steps in the above method to obtain the monoclinic structure Y 2 Si 0.9 Eu 0.1 o 5 Inorganic phosphors.

Embodiment 2

[0048] 0.45 g of europium nitrate, 7.66 g of yttrium nitrate and 2.56 g of sodium silicate were dissolved in 100 ml of water and stirred to obtain solution 1. Dissolve 3.15g of glycine into 50ml of water to obtain solution 2, pour solution 1 into solution 2, stir at 60°C until clear solution 3, and stir for 1.5 hours at a speed of 80 to 100 rpm by ultrasonic oscillation , and then concentrated and burned at 120°C to obtain the precursor powder. And the precursor powder was calcined at 800°C for 4 hours, the heating rate was 15°C / min, and then ground for 1 hour, and then followed the remaining specific steps in the above method to obtain the monoclinic structure Y 2 Si 0.9 Eu 0.1 o 5 Inorganic phosphors.

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Abstract

The invention relates to monoclinic-system-structured superfine white nano fluorescent powder and a preparation method thereof.The average particle size of the fluorescent powder is 65-75 nanometers, each single particle sequentially comprises four layers of fluorescent substances, the four layers of fluorescent substances have the same crystal structure and different chemical components, the chemical formula of each layer of fluorescent substances is Y2Si1-xEuxO5, x is the mole doping amount of Eu3+ doping, and 0.05< / =X< / =0.30.The fluorescent powder can emit light with the wavelength being 580-625 nanometers under the excitation of ultraviolet with the wavelength being 385-415 nanometers.The fluorescent powder is good in heat stability, good in chemical stability, and the like.The preparation method has the advantages that the method is simple, easy in raw material obtaining, low in synthesizing temperature, simple and controllable in process and suitable for large-scale production, and the obtained product is good in ion dispersity and even in particle size distribution.

Description

technical field [0001] The invention relates to the field of fluorescent powder, in particular to an ultrafine white nano fluorescent powder with a monoclinic structure and a preparation method thereof. Background technique [0002] With the depletion of the earth's fossil resources, the emergence of white LED with its high brightness and long life gradually replaces daily tungsten filament bulbs and becomes a new lighting method for human beings. Nichia took the lead in making a breakthrough in blue GaN-based LED technology in 1993, and quickly industrialized it. In 1996, it developed a white light LED, which was put on the market in 1998, which attracted great attention from the industry. Compared with traditional lighting sources, white LEDs have many advantages, such as: small size, low energy consumption, fast response, long life, and no pollution. The many advantages of white LED make it more and more used in daily life, such as background lighting, traffic lights, fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79B82Y20/00B82Y40/00
CPCC09K11/7792B82Y20/00B82Y40/00
Inventor 仝玉萍王富强符静张存民王清云韩爱红刘丽霍洪媛张建华宋鹏飞马军涛
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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