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Preparation method and application of green manganese-doped silicate fluorescent material

A fluorescent material and manganese doping technology, applied in the field of fluorescent materials, can solve the problems of low absorption intensity, short afterglow time, low quantum efficiency, etc., and achieve the effects of low equipment requirements, simple preparation process and high luminous brightness

Inactive Publication Date: 2019-07-19
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a green manganese-doped fluorescent material for the problems of long afterglow time, low absorption intensity in near-ultraviolet and blue light excitation regions, and low quantum efficiency under 270nm and 420nm excitation. Preparation method and application of silicate fluorescent material, by including Zn in the raw material 2+ The compound reduces its stoichiometric ratio by 2%-15%, and is doped with manganese and nitrogen to replace zinc and oxygen respectively. After high-temperature solid-phase synthesis, a compound with high quantum efficiency, short afterglow time, excellent thermal stability and simple preparation method is obtained. Green fluorescent materials for ultraviolet and blue light excitation, and can be effectively used in fluorescent lamps and white LEDs

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  • Preparation method and application of green manganese-doped silicate fluorescent material
  • Preparation method and application of green manganese-doped silicate fluorescent material
  • Preparation method and application of green manganese-doped silicate fluorescent material

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Embodiment 1

[0043] This embodiment provides a green manganese-doped silicate fluorescent material, the preparation of which includes the following steps:

[0044] (1) According to the chemical formula Zn 1.92 mn 0.08 SiO 4 Composition, reduce the ZnO in the experimental raw material by 15% of its stoichiometric ratio, weigh 0.5983gZnO, 0.0414gMnCO 3 , 0.2075gSiO 2 , and grind for 30 minutes to mix the raw materials evenly to obtain a mixed powder;

[0045] (2) Put the mixed powder into a corundum crucible, put it into a tubular atmosphere furnace, raise the temperature up to 800°C at a rate of 5°C / min, keep it warm for 2 hours, and then raise it to 1250°C at a rate of 5°C / min ℃, keep warm for 4h, then drop to 800°C at a rate of 5°C / min, hold for 2h, and finally drop to 500°C at a rate of 5°C / min, then cool to room temperature naturally, take out the obtained powder and grind it into powder Get the required phosphor material.

[0046] Figure 7 Shown is the XRD spectrum of the fluor...

Embodiment 2

[0048] This embodiment provides a green manganese-doped silicate fluorescent material, the preparation of which includes the following steps:

[0049] (1) According to the chemical formula Zn 1.92 mn 0.08 SiO 3.9 N 0.1 Composition, reduce the ZnO in the experimental raw material by 15% of its stoichiometric ratio, weigh 0.5988gZnO, 0.2505gSiO 2 , 0.0158gSi 3 N 4 and 0.0414gMnCO 3 , and grind for 30 minutes to mix the raw materials evenly to obtain a mixed powder;

[0050] (2) Put the mixed powder into a corundum crucible, put it into a tube-type atmosphere furnace, and 2 Under the atmosphere, the temperature was raised to 800°C at a rate of 5°C / min, kept for 2 hours, and then raised to 1250°C at a rate of 5°C / min, kept for 4 hours, and then the reducing gas H was introduced. 2 , lowered to 800°C at a rate of 5°C / min, kept for 2 hours, and finally cooled to room temperature at a rate of 5°C / min to 500°C, then the obtained powder was taken out and ground into a powder to...

Embodiment 3

[0052] This embodiment provides a green manganese-doped silicate fluorescent material, the preparation of which includes the following steps:

[0053] (1) According to the chemical formula Zn 1.92 mn 0.08 SiO 3.8 N 0.2 Composition, reduce the ZnO in the experimental raw material by 15% of its stoichiometric ratio, weigh 0.5993gZnO, 0.2304gSiO 2 , 0.0317gSi 3 N 4 and 0.0415gMnCO 3 , and grind for 30 minutes to mix the raw materials evenly to obtain a mixed powder;

[0054] (2) Put the mixed powder into a corundum crucible, put it into a tube-type atmosphere furnace, and 2 Under the atmosphere, the temperature was raised to 800°C at a rate of 5°C / min, kept for 2 hours, and then raised to 1250°C at a rate of 5°C / min, kept for 4 hours, and then the reducing gas H was introduced. 2 , lowered to 800°C at a rate of 5°C / min, kept for 2 hours, and finally cooled to room temperature at a rate of 5°C / min to 500°C, then the obtained powder was taken out and ground into a powder to...

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Abstract

The invention discloses a preparation method and application of a green manganese-doped silicate fluorescent material. The chemical formula composition of the fluorescent material is Zn2SiO4-yNy: xMn<2+>, x is greater than or equal to 0.02 and less than or equal to 0.08, and y is greater than or equal to 0 and less than or equal to 1. A compound containing Zn<2+> in raw materials is reduced by 2-15% of the stoichiometric ratio, other raw materials are normally weighed according to the stoichiometric ratio, and the material is prepared by adopting a high-temperature solid-phase synthesis method. By means of the mode, the doped manganese and nitrogen replace zinc and oxygen respectively, the green fluorescent material which is high in quantum efficiency, short in afterglow time, excellent inthermal stability and simple and convenient in preparation method and is used for ultraviolet and blue light excitation can be obtained, and the green fluorescent material can be effectively appliedto fluorescent lamps and white light LEDs.

Description

technical field [0001] The invention relates to the field of fluorescent materials, in particular to a preparation method and application of a green manganese-doped silicate fluorescent material. Background technique [0002] As a new type of green and environmentally friendly solid-state lighting source, white LED is widely used in lighting and display fields due to its advantages of energy saving, high efficiency, long life, and fast response. As an important part of LED, fluorescent materials emit visible light by absorbing ultraviolet, near-ultraviolet or blue light. The quality of its luminous performance directly affects the luminous efficiency, display effect and service life of the light source. [0003] According to the principles of luminescence and photometry, white light can be formed by mixing the three primary colors of red, blue, and green. Therefore, there are currently three main ways to realize white LEDs: 1. Package the red, green, and blue LED chips toget...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59H01L33/50
CPCC09K11/0883C09K11/595H01L33/502Y02B20/00
Inventor 王闯王建睿朱革辛双宇姜静李卓为周发光高淼
Owner BOHAI UNIV
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