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Silicate fluorescent material and preparation method thereof

A fluorescent material and silicate technology, which is applied in the field of fluorescent materials, can solve the problems of low luminous intensity and low luminous efficiency

Inactive Publication Date: 2012-03-14
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the luminous intensity and luminous efficiency of traditional silicate fluorescent materials are low

Method used

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  • Silicate fluorescent material and preparation method thereof
  • Silicate fluorescent material and preparation method thereof
  • Silicate fluorescent material and preparation method thereof

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preparation example Construction

[0025] Such as figure 1 Shown, the preparation method of above-mentioned silicate fluorescent material comprises the following steps:

[0026] Step S110, preparing an N ion solution. The compound containing N ions is dissolved in the solvent, and the concentration range is 1×10 -6 mol / L~1×10 -1 mol / L N ion solution. Among them, the compound containing N ions can be AgNO 3 , HAuCl 4 4H 2 O, H 2 PtCl 6 ·6H 2 O or PdCl 2 2H 2 O, the solvent can be water or ethanol.

[0027] Step S120, preparing porous glass containing M ions. Soaking the porous glass into the N ion solution prepared in step (1) for 0.5 hours to 24 hours, so that the N ion solution can fully enter the micropores of the porous glass. The porous glass is then taken out, and the surface of the glass is washed with deionized water or the like to obtain porous glass containing N ions.

[0028] Step S130, preparing SiO containing N ions 2 raw material. The porous glass containing N ions obtained in step ...

Embodiment 1

[0035] Silver nanoparticles doped Sr 2.925 Ce 0.05 SiO 5 The preparation of fluorescent material, the preparation method comprises the following steps:

[0036] (1) Weigh 0.0017g of AgNO with an analytical balance 3 , prepared to a concentration of 1×10 in 100ml -4 mol / L Ag + aqueous solution.

[0037] (2) Take an appropriate amount of porous glass and soak it into Ag + 12 hours in aqueous solution.

[0038] (3) will fully soak the Ag + The porous glass was taken out, rinsed with deionized water, dried and ground into powder in a mortar for later use.

[0039] (4) silver-containing porous glass powder 0.3004g that step (3) obtains with analytical balance, Sr 2 CO 3 2.1591g and CeO 2 0.0430g, put it in a corundum crucible and mix well.

[0040] (5) mix the raw materials in step (4) at 95%N 2 +5%H 2 Calcined at 1450°C for 5 hours in a reducing atmosphere, the obtained product was cooled to room temperature, and Sr was obtained after grinding. 2.925 Ce 0.05 SiO 5...

Embodiment 2

[0043] Silver nanoparticles doped Ba 2.955 Ce 0.03 SiO 5 The preparation of fluorescent material, the preparation method comprises the following steps:

[0044] (1) Weigh 1.6987g of AgNO with an analytical balance 3 , prepared into 100ml of Ag with a concentration of 0.1mol / L + aqueous solution.

[0045] (2) Take an appropriate amount of porous glass and soak it into Ag + 10 hours in aqueous solution.

[0046] (3) will fully soak the Ag + The porous glass was taken out, rinsed with deionized water, dried and ground into powder in a mortar for later use.

[0047] (4) silver-containing porous glass powder 0.3004g that step (3) obtains with analytical balance, BaCO 3 2.9157g and CeO 2 0.0258g was placed in a corundum crucible and mixed well.

[0048] (5) mix the raw materials in step (4) at 95%N 2 +5%H 2 Calcined at 1500°C for 8 hours in a reducing atmosphere, the resulting product was cooled to room temperature, and Gd was obtained after grinding 0.4 Y 1.5 Ce 0.1 ...

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Abstract

The invention provides a silicate fluorescent material which comprises a fluorescent powder body and metal nano particles doped in the fluorescent powder body. The chemical composition of the silicate fluorescent material is as follows: M[3-15x]CexSiO5:N, wherein M is at least one of Sr, Ba and Ca, and N is at least one of Ag, Au, Pd and Pt metal nano particles. According to the invention, the internal quantum efficiency of a luminescent material can be greatly improved through doping the metal nano particles in the fluorescent powder by virtue of plasma resonance effect generated on the surfaces of the metal nano particles, thereby improving the luminescent intensity and luminescent efficiency of the luminescent material. The invention also provides a preparation method of the silicate fluorescent material.

Description

【Technical field】 [0001] The invention relates to a fluorescent material, in particular to a silicate fluorescent material and a preparation method thereof. 【Background technique】 [0002] Energy conservation and environmental protection are important issues in the development of various industries today, and countries all over the world are committed to research and development in this area. For lighting, which is a large electricity consumer, how to reduce its energy consumption is one of the focuses of energy conservation and environmental protection research. Light-emitting diode (Light Emitting Diode, LED) is considered to be a green lighting source most likely to enter the field of general lighting. It has the characteristics of energy saving, environmental protection, high reliability, and long life. Lighting and other fields have shown great application prospects. As a new type of green and environment-friendly solid-state lighting source, white LED is known as the...

Claims

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Application Information

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IPC IPC(8): C09K11/79
Inventor 周明杰马文波乔延波
Owner OCEANS KING LIGHTING SCI&TECH CO LTD