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Green fluorescent powder suitable for excitation of near ultraviolet light and blue light and preparation method thereof

A technology of green phosphor and blue light excitation, applied in the field of fluorescent materials, can solve the problem that metal silicate green phosphor is not seen, and achieve the effects of good luminous intensity, easy product and environmental friendliness

Active Publication Date: 2014-03-19
扬州科丰高新产业投资开发集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent "A method for optimizing the crystal form of silicate green phosphor material" (CN102191057A), the general chemical formula provided is (Ba, A) 1-x SiO 4 : xEu, where 02+ A kind of activated blue phosphor for white light LED and preparation method thereof, its chemical formula is Ca 1-x SiO 3 :Eu 2+ , 02+ Ion-activated metal silicate green phosphors have not been reported in the literature

Method used

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  • Green fluorescent powder suitable for excitation of near ultraviolet light and blue light and preparation method thereof
  • Green fluorescent powder suitable for excitation of near ultraviolet light and blue light and preparation method thereof
  • Green fluorescent powder suitable for excitation of near ultraviolet light and blue light and preparation method thereof

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Effect test

Embodiment 1

[0034] According to the chemical formula Ba 1.98 Eu 0.02 Zn 3 Si 3 o 11 The stoichiometric ratio of each element in , respectively weighed BaCO 3 : 0.992 g, Eu 2 o 3 : 0.00893 g, ZnO: 0.615 g, SiO 2: 0.4575 g. After grinding and mixing uniformly in an agate mortar, choose the air atmosphere for the first calcination, the temperature is 325°C, and the calcination time is 4 hours, then cool to room temperature, and take out the sample. After the first calcination of the raw materials, the mixture is fully mixed and ground again, and the second sintering is carried out at 850°C in an air atmosphere. The sintering time is 8 hours, cooled to room temperature, and the sample is taken out. After the second calcining, the mixture is ground and mixed evenly, and calcined in a reducing atmosphere at a calcining temperature of 1000° C. and a calcining time of 5 hours to obtain the target product.

[0035] See attached figure 1 , which is the X-ray powder diffraction pattern of ...

Embodiment 2

[0039] According to the chemical formula Ba 1.96 Eu 0.04 Zn 3 Si 3 o 11 The stoichiometric ratio of each element in , respectively weighed BaCO 3 : 0.9817 g, Eu 2 o 3 : 0.0179 g, ZnCO 3 : 0.9547 g, SiO 2 : 0.4575 g. After grinding and mixing uniformly in an agate mortar, choose the air atmosphere for the first calcination, the temperature is 305°C, and the calcination time is 3 hours, then cool to room temperature, and take out the sample. After the first calcination of the raw materials, the mixture is fully mixed and ground again, and the second sintering is carried out at 400°C in an air atmosphere. The sintering time is 6 hours, cooled to room temperature, and the sample is taken out. After the second calcination, the mixture is ground and mixed evenly, and calcined in a reducing atmosphere at a calcination temperature of 1100° C. for 7 hours to obtain the target product. The main structural properties, excitation spectrum and luminescence spectrum are similar to...

Embodiment 3

[0041] According to the chemical formula Ba 1.92 Eu 0.08 Zn 3 Si 3 o 11 The stoichiometric ratio of each element in the 3 ) 2 : 1.273 g, Eu 2 o 3 : 0.0358 g, Zn(OH) 2 : 0.757 g, SiO 2 : 0.4575 g. After grinding and mixing uniformly in an agate mortar, choose the air atmosphere for the first calcination, the temperature is 350°C, and the calcination time is 10 hours, then cool to room temperature, and take out the sample. After the first calcination of the raw materials, the mixture is fully mixed and ground again, and the second sintering is carried out at 500°C in an air atmosphere. The sintering time is 7 hours, cooled to room temperature, and the sample is taken out. After the second calcination, the mixture is ground and mixed evenly, and calcined in a reducing atmosphere at a calcination temperature of 1300° C. for 10 hours to obtain the target product. The main structural properties, excitation spectrum and luminescence spectrum are similar to those of Exampl...

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Abstract

The invention relates to green fluorescent powder suitable for excitation of near ultraviolet light and blue light and a preparation method of the green fluorescent powder, and belongs to the technical field of fluorescent materials. The green fluorescent powder provided by the invention has a chemical formula of Ba2-2xEu2xM3Si3O11, wherein M is Zn<2+> or Mg<2+>, and 0.001<=x<=0.5, and the green fluorescent powder is prepared by a high-temperature solid phase method or a chemical solution method. The green fluorescent powder provided by the invention has strong excitation near a range from 350nm to 450nm, which is very fit to the emission wavelength of a near ultraviolet LED (light emitting diode) chip, and has high luminescent intensity, wide excitation wavelength and good stability and color development property; under excitation of near ultraviolet light and blue light, the green fluorescent powder emits bright green fluorescence at a range from 495nm to -579nm. The green fluorescent powder has the advantages of simple preparation method, strong operability and good repeatability; and the obtained product has stable luminous quality and is easy for industrial production.

Description

technical field [0001] The invention relates to a green fluorescent luminescent material and a preparation method thereof, in particular to a fluorescent powder emitting green fluorescence under near-ultraviolet light excitation and a preparation method thereof, which can be applied to white LEDs excited by near-ultraviolet light and blue light, It belongs to the technical field of fluorescent materials. Background technique [0002] Since Nichia Corporation of Japan developed the blue light-emitting diode LED, semiconductor solid-state lighting technology has developed rapidly. In addition to overcoming the shortcomings of traditional incandescent and fluorescent lamps such as high power consumption, fragility, and waste mercury pollution, white LEDs are also environmentally friendly. , small size, long life, fast response and other advantages, so it has a wide range of application prospects. [0003] Currently, the mature method of obtaining white LEDs is to use blue die-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/59
Inventor 黄彦林袁蓓玲徐传艳韦之豪朱睿杜福平
Owner 扬州科丰高新产业投资开发集团有限公司