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Synthesis method of phosphosilicate white light emission fluorescent powder

A technology of phosphosilicate and synthesis method, which is applied in chemical instruments and methods, luminescent materials, climate sustainability, etc., can solve the problems of short excitation range, insufficient fluorescent pink component, easy light color drift, etc. The effect of emission intensity

Pending Publication Date: 2020-02-14
HEZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of insufficient fluorescent pink components, easy drift of light color and short excitation range, and provide a method for preparing phosphosilicate white light-emitting phosphors by using a high-temperature solid-phase method. The method not only requires Easy to control and synthesized products with good luminous performance

Method used

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  • Synthesis method of phosphosilicate white light emission fluorescent powder
  • Synthesis method of phosphosilicate white light emission fluorescent powder
  • Synthesis method of phosphosilicate white light emission fluorescent powder

Examples

Experimental program
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Effect test

Embodiment 1～4

[0021] Weigh the drug according to the raw material ratio in Table 1, mix the drug evenly in an agate mortar, and grind for 30 minutes; put the evenly ground sample into a corundum crucible, place the crucible in a muffle furnace, and grind it in an air atmosphere , 600°C pre-burning for 4 hours for precursor treatment, the heating system is 10min → 450°C → 20min → 450°C → 15min → 600°C → 240min → 600°C → end, to obtain the precursor mixed oxide; the precursor mixed oxidation Take out the material, put it in an agate mortar and grind it evenly again, and the grinding time is 10 minutes. Place the ground precursor in a corundum crucible, put it into a tube furnace, and react at 1000°C for 4h under a reducing atmosphere (the temperature is 1000-1100°C, and the reaction time is 3-4h, for comparison, In Examples 1-4, the temperature is uniformly 1000° C., and the reaction time is 4 h). After cooling to room temperature, take out and grind evenly to obtain a phosphosilicate white l...

Embodiment 5～13

[0029] Weigh the drug according to the raw material ratio in Table 2, mix the drug evenly in an agate mortar, and grind for 30 minutes; put the evenly ground sample into a corundum crucible, place the crucible in a muffle furnace, and grind it in an air atmosphere Pre-burn at 600°C for 4 hours for precursor treatment, the heating system is 10min → 450°C → 20min → 450°C → 15min → 600°C → 240min → 600°C → end, to obtain the precursor mixed oxide; mix the precursor The oxides were taken out, placed in an agate mortar and ground again evenly, and the grinding time was 10 minutes. Put the ground precursor in a corundum crucible, put it into a tube furnace, and react at 1000°C for 4h under a reducing atmosphere (where the temperature is 1000-1100°C, and the reaction time is 3-4h, for the convenience of comparison, implement In Example 1-4, the temperature is uniformly 1000° C., and the reaction time is 4 h). After cooling to room temperature, take it out and grind it evenly to obtai...

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Abstract

The invention provides a synthesis method of phosphosilicate white light emission fluorescent powder. The preparation method includes: firstly weighing corresponding oxide, carbonate, phosphate and fluoride, mixing the weighed substances, grinding the mixture uniformly in an agate mortar and then putting the product into a corundum crucible, putting the corundum crucible into a muffle furnace, performing presintering for 4h at 600DEG C under an air condition, conducting cooling to room temperature, taking the product out for grinding, putting the obtained product into a corundum crucible, thenconducting roasting for 3-4h at 1000-1100DEG C in an atmosphere of 20%H2+80%N2, conducting natural cooling to room temperature, and then taking out the product for uniform grinding, thus obtaining white powder. The white light emission fluorescent powder prepared by the method overcomes the defects of poor color rendering properties and narrow excitation wavelength of traditional fluorescent powder, utilizes the process of co-doping of Ce<3+> / Mn<2+> in single matrix to prepare the phosphosilicate white light emission fluorescent powder in a wide ultraviolet excitation range through energy transfer among ions.

Description

technical field [0001] The invention belongs to the field of powder material synthesis, and in particular relates to a method for synthesizing fluorescent powder by high-temperature solid-phase reaction in a reducing atmosphere. Background technique [0002] LED, a green lighting source, can directly convert electrical energy into light energy, greatly improving efficiency, and has a huge advantage in saving a large amount of electrical energy, and is more and more respected by people. To achieve the popularization of LED lighting, the research and development of fluorescent conversion materials is the top priority. The match between the chip and the fluorescent material is an important factor affecting the electrical and optical performance of the product and the stability of the device. For the selection of fluorescent materials, it is necessary to comprehensively consider its excitation spectrum, emission spectrum, photoinduced conversion efficiency, particle size distri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/73
CPCC09K11/7725C09K11/73Y02B20/00
Inventor 莫福旺汤泉姜微凌俞岑雨涓梁海彪吴铭辉沈车
Owner HEZHOU UNIV
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