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A kind of blue fluorescent powder doped with bismuth and manganese and its preparation method and application

A technology of blue phosphor and manganese doping, applied in chemical instruments and methods, luminescent materials, climate sustainability, etc., can solve the problems of difficult preparation of materials, low excitation efficiency, low energy utilization rate, etc., to improve Blue light luminous intensity, improved energy utilization, and good particle consistency

Active Publication Date: 2021-02-12
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these phosphors have been commercialized, they still have disadvantages such as poor thermal stability and low near-ultraviolet excitation efficiency. Under ultraviolet radiation, they are prone to degradation of luminous brightness and color coordinate shift.
There are also problems such as low energy utilization rate, low luminous intensity, and difficult preparation of materials.

Method used

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  • A kind of blue fluorescent powder doped with bismuth and manganese and its preparation method and application
  • A kind of blue fluorescent powder doped with bismuth and manganese and its preparation method and application
  • A kind of blue fluorescent powder doped with bismuth and manganese and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A blue fluorescent powder doped with bismuth and manganese, its general formula is: Bi x mn y Y 6-x-y WO 12 , where, 0.005≤x≤0.05, 0.001≤y≤0.01.

[0046] The preparation method of the blue fluorescent powder doped with bismuth and manganese comprises the following steps:

[0047] (1) Weigh ammonium tungstate according to the molar ratio in the general formula, dissolve it in distilled water, then add hydrogen peroxide, and stir to obtain solution A;

[0048] (2) Take the soluble salt of yttrium, the soluble salt of manganese and the soluble salt of bismuth according to the molar ratio in the general formula, dissolve in solution A, stir to obtain solution B;

[0049] (3) The solution B is heated, stirred and concentrated, and then dried to obtain the colloid C;

[0050] (4) Calcining the colloid C to obtain a blue phosphor.

Embodiment 2

[0052] A blue fluorescent powder doped with bismuth and manganese, its general formula is: Bi x mn y Y 6-x-y WO 12 , where x=0.005, y=0.001.

[0053] The preparation method of the blue fluorescent powder doped with bismuth and manganese comprises the following steps:

[0054] (1) Weigh ammonium tungstate according to the molar ratio in the general formula, dissolve it in distilled water, then add hydrogen peroxide, and stir to obtain solution A; wherein, the amount of distilled water is: according to the molar ratio, ammonium tungstate:distilled water=1:20; The amount of hydrogen peroxide is: according to the molar ratio, ammonium tungstate: hydrogen peroxide = 1: 1;

[0055] (2) Take by weighing the soluble salt of yttrium, the soluble salt of manganese and the soluble salt of bismuth according to the molar ratio in the general formula, be dissolved in solution A, stir to obtain solution B; The soluble salt of yttrium is carbonate; The soluble salt of manganese are nitra...

Embodiment 3

[0059] A blue fluorescent powder doped with bismuth and manganese, its general formula is: Bi x mn y Y 6-x-y WO 12 , where x=0.05, y=0.01.

[0060] The preparation method of the blue fluorescent powder doped with bismuth and manganese comprises the following steps:

[0061] (1) Weigh ammonium tungstate according to the molar ratio in the general formula, dissolve it in distilled water, then add hydrogen peroxide, and stir to obtain solution A; wherein, the amount of distilled water is: according to the molar ratio, ammonium tungstate:distilled water=1:40; The amount of hydrogen peroxide is: according to the molar ratio, ammonium tungstate: hydrogen peroxide = 1: 1;

[0062] (2) take by weighing the soluble salt of yttrium, the soluble salt of manganese and the soluble salt of bismuth according to the mol ratio in the general formula, be dissolved in solution A, stir to obtain solution B; The soluble salt of yttrium is nitrate; The soluble salt of manganese is Nitrates and...

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Abstract

The invention discloses a blue fluorescent powder doped with bismuth and manganese, the general formula of which is: Bi x mn y Y 6‑x‑y WO 12 , where, 0.005≤x≤0.05, 0.001≤y≤0.01. It also discloses its preparation method and application. The invention provides a blue phosphor doped with bismuth and manganese, which uses yttrium tungstate as a matrix and simultaneously mixes manganese and bismuth elements, and the obtained blue phosphor has high purity, good color purity, and good particle consistency. and good thermal stability. The wavelength of the excitation wave is increased, which can be increased to 369nm, and the luminous intensity is effectively increased, so that the energy utilization rate is greatly improved. The preparation process is simple and easy to operate, the calcination temperature is low, the conditions are mild and easy to control, the prepared sample has high purity, high yield, no need to add precipitant, low cost, and is suitable for large-scale production. The blue fluorescent powder doped with bismuth and manganese of the invention can be used in luminescent materials for white light LEDs.

Description

technical field [0001] The invention relates to a blue fluorescent powder doped with bismuth and manganese, a preparation method and application thereof, and specifically belongs to the technical field of luminescent materials. Background technique [0002] As a new type of all-solid-state lighting source, white LED is regarded as a green lighting source in the 21st century because of its many advantages, broad application prospects and potential markets. White light is formed by mixing polychromatic light. In order to obtain white light with high efficiency, high color rendering index and different color temperatures, according to the principles of luminescence and photometry, three primary colors or multi-primary color light can be combined. However, in terms of luminous color technology, it still stays at medium and long wavelengths (green, red light). Due to the lack of short-wavelength blue light, the overall application of LEDs is still somewhat insufficient. Therefor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78H01L33/50
CPCC09K11/7708H01L33/502Y02B20/00
Inventor 刘宣文郭瑞颜云翔刘广齐靖宇方圆祝文娜苏娜
Owner 东北大学秦皇岛分校
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