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Vanadate garnet type fluorescent material as well as preparation method and application thereof

A garnet type, fluorescent material technology, applied in the direction of luminescent materials, chemical instruments and methods, lasers, etc., can solve the problems that limit the application of fluorescent materials, and achieve the effect of broadening application fields, high heat release characteristics, and wide application fields

Inactive Publication Date: 2010-01-13
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This limits the application of the fluorescent material

Method used

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  • Vanadate garnet type fluorescent material as well as preparation method and application thereof
  • Vanadate garnet type fluorescent material as well as preparation method and application thereof
  • Vanadate garnet type fluorescent material as well as preparation method and application thereof

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Experimental program
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Effect test

preparation example Construction

[0038] The preparation method of the vanadate garnet-type fluorescent material comprises the following steps:

[0039] 1) According to the chemical composition expression A 2-2x K 1+x N x m 2 V 3 o 12 The ratio of each element in the formula is weighed to take ammonium metavanadate NH 4 VO 3 and the nitrates of other metal elements, the total mass is W 1 , add water, and a co-solvent (citric acid), and stir well at 70-80°C to obtain a sol or gel (precursor);

[0040] 2) Put the above precursor into a high-temperature furnace preheated to 400-1000° C. for reaction; the reaction time is 10-120 minutes.

[0041] Specifically, the gel can be reacted at a temperature of 400-700°C for 10-60 minutes to obtain a product, and the sol can be reacted at a temperature of 600-1000°C for 60-120 minutes to obtain a product. Prolonging the reaction time can increase the crystallinity of the product, thereby increasing the luminous intensity.

[0042] 3) After the reaction is complet...

Embodiment 1

[0047] Embodiment 1 Garnet type fluorescent material Ca 2 KMg 2 V 3 o 12 preparation of

[0048] The preparation method is as follows:

[0049] 1) Take each reaction raw material by the following weight:

[0050] Table 1

[0051]

[0052] 2) Add 1200 grams of citric acid to the raw material of 1), and then add 700 grams of water, and stir thoroughly at a temperature of 75° C. to obtain a sol (precursor).

[0053] 3) Reacting the precursor obtained in 2) at a temperature of 900° C. for 60 minutes to obtain a reaction product.

[0054] 4) The reaction product obtained in 3) is taken out and cooled to room temperature.

[0055] The XRD pattern and Ca of the obtained sample 2 KMg 2 V 3 o12 For the comparison chart of the standard phase PDF card, see figure 1 , as can be seen from the spectrum, the two are completely consistent, indicating that the phase of the sample in this example is a single phase of Ca 2 KMg 2 V 3 o 12 .

Embodiment 2

[0060] Example 2 Rare earth-doped garnet-type fluorescent material Ca 1.94 K 1.03 Eu 0.03 Mg 2 V 3 o 12 preparation of

[0061] The preparation method is as follows:

[0062] 1) Take each reaction raw material by the following weight:

[0063] Table 2

[0064]

[0065] 2) Add 1200 grams of citric acid to the raw material described in 1), and then add 700 grams of water, and fully stir at a temperature of 75° C. to obtain a sol (precursor).

[0066] 3) Reacting the precursor obtained in 2) at a temperature of 900° C. for 60 minutes to obtain a reaction product.

[0067] 4) The reaction product obtained in 3) is taken out and cooled to room temperature.

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Abstract

The invention relates to a vanadate garnet type fluorescent material as well as a preparation method and the application thereof, belonging to the field of vanadate inorganic luminescent materials and aiming at solving the technical problem of providing a wideband-emission fluorescent material with wide excitation spectrum range and high luminescent strength. The vanadate garnet type fluorescent material comprises the components: A(2-2x)K(1+x)NxM2V3O12, wherein x is more than or equal to 0 and less than or equal to 0.1, A is selected from at least one of Ca, Sr and Ba, M is selected from at least one element of Mg and Zn, and N is selected from at least one element of Ce, Pr, Sm, Nd, Eu, Gd, Tb, Dy, Ho, Er, Tm and Bi. The fluorescent material belongs to a garnet-type structure in a cubic system and has high luminescent strength and wide excitation spectrum band, and an emission spectrum is emitted by a wideband for covering the whole visible light region. The invention can be widely used in systems of electron, information, traffic, energy sources and illumination and has more remarkable superiority in the application of fourth-generation solid luminescent devices excited by purple light or long-wave ultraviolet light emitted by purple light or ultraviolet light-emitting diodes.

Description

technical field [0001] The invention relates to a vanadate garnet-type broadband emitting fluorescent material, a preparation method and application thereof, and belongs to the field of vanadate inorganic luminescent materials. Background technique [0002] With the advent of blue light and near-ultraviolet InGaN LED light-emitting diodes, yttrium aluminum garnet YAG:Ce that can convert 450-470nm blue light into broadband yellow light emission 3+ Fluorescent materials have attracted widespread attention. Because the yellow light it emits can be combined with the blue light of 450-470nm to obtain cool white light with a higher color temperature, therefore, yttrium aluminum garnet YAG:Ce 3+ Become the basic fluorescent material of white light-emitting diodes. Its obvious disadvantage is that the white light obtained after compounding with blue light has a higher color temperature and a lower color rendering index. Later, in order to improve the yellow light of blue LED, ytt...

Claims

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Application Information

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IPC IPC(8): C09K11/69C09K11/82H01L33/00H01S5/00
Inventor 邱克辉李钧甫李峻峰
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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