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Bismuth ion doped chloroborate fluorescent powder and preparation method thereof

A chloroborate and bismuth ion technology is applied in the field of bismuth ion-doped chloroborate phosphor and its preparation, which can solve the problems of low rare earth ion absorption efficiency, high cost, narrow emission spectrum range, etc. Effects of thermal and physicochemical stability, low cost, and wide emission spectrum

Inactive Publication Date: 2017-04-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to address the disadvantages of low rare earth ion absorption efficiency, narrow emission spectrum range, and high cost of existing lighting phosphor materials, using Bi ions as the luminescent center to prepare Bi ion-doped chloroborate lighting phosphors, which are beneficial to Ultraviolet light excitation has high-efficiency response characteristics, and a bismuth ion-doped chloroborate phosphor and its preparation method are provided

Method used

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  • Bismuth ion doped chloroborate fluorescent powder and preparation method thereof
  • Bismuth ion doped chloroborate fluorescent powder and preparation method thereof
  • Bismuth ion doped chloroborate fluorescent powder and preparation method thereof

Examples

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Effect test

Embodiment 1

[0020] The bismuth ion-doped chloroborate phosphor has a chemical composition formula of Ba 2 Y(BO 3 ) 2 Cl: 0.001 Bi.

[0021] The preparation method of the bismuth ion-doped chloroborate fluorescent powder, its specific steps are as follows:

[0022] (1) Firstly mix 0.05molBaO, Y 2 o 3 、 Bi 2 o 3 , B 2 o 3 and NH 4 Cl is mixed and ground uniformly according to the molar ratio of 2:0.5:0.0005:1:1 to obtain the mixed material;

[0023] (2) In an air atmosphere, heat the mixed material obtained in step (1) to 800° C. for 4 hours and then cool to room temperature with the furnace temperature. After grinding, bismuth ion-doped chloroborate phosphor is obtained.

[0024] The above obtained bismuth ion-doped chloroborate phosphor

[0025] The Ba obtained from Example 1 of the present invention 2 Y(BO 3 ) 2 The excitation spectrum of Cl:0.001Bi phosphor, such as figure 1 shown, from figure 1 It can be seen that the optimum excitation wavelength of the 415nm emission ...

Embodiment 2

[0029] The bismuth ion-doped chloroborate phosphor has a chemical composition formula of Ba 2 Y(BO 3 ) 2 Cl: 0.05Bi.

[0030] The preparation method of the bismuth ion-doped chloroborate fluorescent powder, its specific steps are as follows:

[0031] (1) Firstly mix 0.05molBaO, Y 2 o 3 、 Bi 2 o 3 , B 2 o 3 and NH 4 Cl is mixed and ground according to the molar ratio of 2:0.5:0.025:1:1 to obtain the mixed material;

[0032] (2) In an air atmosphere, heat the mixed material obtained in step (1) to 1200°C for 2 hours, then cool to room temperature with the furnace temperature, and grind to obtain a bismuth ion-doped chloroborate phosphor.

[0033] The excitation and emission spectra of the bismuth ion-doped chloroborate phosphor prepared in this example are as follows: figure 1 shown, from Figure 4 As can be seen in: the Ba obtained in Example 2 2 Y(BO 3 ) 2 The best excitation wavelength of Cl:0.05Bi phosphor is 336nm, under the excitation of 336nm, it has a broa...

Embodiment 3

[0035] The bismuth ion-doped chloroborate phosphor has a chemical composition formula of Ba 2 Y(BO 3 ) 2 Cl: 0.1Bi.

[0036] The preparation method of the bismuth ion-doped chloroborate fluorescent powder, its specific steps are as follows:

[0037] (1) Firstly mix 0.05molBaO, Y2 o 3 、 Bi 2 o 3 , B 2 o 3 and NH 4 Cl is mixed and ground uniformly according to the molar ratio of 2:0.5:0.05:1:1 to obtain the mixed material;

[0038] (2) In an air atmosphere, heat the mixed material obtained in step (1) to 1000° C. for 3 hours, then cool to room temperature with the furnace temperature, and grind to obtain a bismuth ion-doped chloroborate phosphor.

[0039] The above obtained bismuth ion-doped chloroborate phosphor

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Abstract

The invention relates to a bismuth ion doped chloroborate fluorescent powder and a preparation method thereof, and belongs to the technical field of display and illumination fluorescent powder. The chemical formula of the bismuth ion doped chloroborate fluorescent powder is Ba2A(BO3)2Cl:xBi, wherein x=0.001-0.1, and A represents any one of Y, Lu, and Gd. The preparation method comprises the following steps: mixing barium salts, A2O3, Bi2O3, B2O3, and NH4Cl according to the mole ratio of the chemical formula, evenly grinding the mixture to obtain a mixed material; heating the obtained mixed material to a temperature of 800 to 1200 DEG C in an air atmosphere, maintaining the temperature for 2 to 4 hours, cooling the mixed material to the room temperature in the furnace, and grinding the mixed material to obtain the bismuth ion doped chloroborate fluorescent powder. The bismuth ion doped chloroborate fluorescent powder can high efficiently respond to UV rays, and can emit wide spectrum (350-650 nm) fluorescence under the excitation of UV rays. The light-emitting region almost covers the whole visible light band. Moreover, under the excitation of light with different wavelengths, the fluorescent powder can emit visible light in different bands, and color regulation is realized.

Description

technical field [0001] The invention relates to a bismuth ion-doped chloroborate fluorescent powder and a preparation method thereof, belonging to the technical field of display and lighting fluorescent powder. Background technique [0002] White LED semiconductor solid-state lighting technology is considered to be a new generation of light source in the 21st century. White light LED has the advantages of small size, low heat generation, low energy consumption, long life, high reliability, easy maintenance, etc., and meets the requirements of energy saving and environmental protection. At present, there are two main methods for obtaining white light LEDs: one method is to combine LED chips that emit green, red, and blue light, and mix the three kinds of light to form white light emission. The white light of this solution has the advantages of high brightness, good stability and color rendering; however, the cost is high, the driving circuit is complicated, and there is no l...

Claims

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Application Information

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IPC IPC(8): C09K11/86
CPCC09K11/7712
Inventor 杨正文杨健芝邱建备宋志国周大成
Owner KUNMING UNIV OF SCI & TECH
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