Red strontium magnesium phosphate fluorescent material as well as preparation method and application thereof

A technology of strontium magnesium phosphate and fluorescent materials, which is applied in the field of red phosphate fluorescent materials and its preparation, can solve the problems that limit the wide application and promotion of fluorescent powder, and achieve good chemical stability, good matching, and good thermal stability Effect

Active Publication Date: 2018-11-16
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nitride fluorescent materials have high luminous efficiency, good wavelength matching and stable performance, which have attracted widespread attention in recent years. Such harsh conditions greatly limit the wide application and promotion of this phosphor

Method used

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  • Red strontium magnesium phosphate fluorescent material as well as preparation method and application thereof
  • Red strontium magnesium phosphate fluorescent material as well as preparation method and application thereof
  • Red strontium magnesium phosphate fluorescent material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) According to the chemical formula Sr 19 Mg 2 (PO 4 ) 14 : 0.005Eu 2+ (Sr 18.905 Eu 0.095 Mg 2 (PO 4 ) 14 ) composition Weigh 0.9153gSrCO 3, 0.0264g MgO, 0.6063g (NH 4 ) 2 HPO 4 and 0.0054g Eu 2 o 3 , and grind for 30 minutes to mix the raw materials evenly to obtain a mixed powder;

[0038] (2) Put the mixed powder into a corundum crucible, put it into a tube-type atmosphere furnace, and feed the mixed reducing gas, that is, flowing N 2 / H 2 (The volume ratio is 9 / 1) in a reducing atmosphere, raise the temperature at a rate of 5 °C / min to 900 °C for 4 hours, then increase the rate of temperature at 5 °C / min to 1200 °C, keep it at 6 hours, and then heat at 5 °C The rate per minute is lowered to 500°C and then naturally cooled to room temperature, and the obtained powder is taken out and ground into powder to obtain the required phosphor material.

[0039] as the picture shows, figure 1 The sample Sr obtained in Example 1 is shown 18.905 Eu 0.095 M...

Embodiment 2

[0044] (1) According to the chemical formula Sr 19 Mg 2 (PO 4 ) 14 :0.01Eu 2+ (Sr 18.81 Eu 0.19 Mg 2 (PO 4 ) 14 ) composition Weigh 1.7465g Sr(NO 3 ) 2 4H 2 O, 0.0636g 4MgCO 3 ·Mg(OH) 2 ·5H 2 O, 0.4490g H 3 PO 4 and 0.0109g Eu 2 o 3 , grind for 45min to make the raw materials mix evenly;

[0045] (2) Put the mixed powder into a corundum crucible, put it into a tube-type atmosphere furnace, and feed the mixed reducing gas, that is, flowing N 2 / H 2 In a reducing atmosphere in a mixed atmosphere (the volume ratio of nitrogen and hydrogen is 9 / 1), raise the temperature at a rate of 5 °C / min to 900 °C for 4 hours, then increase the rate of temperature to 1200 °C at a rate of 5 °C / min, and keep the temperature for 6 hours. Then cool down to 500° C. at a rate of 5° C. / min, then cool naturally to room temperature, take out the obtained powder and grind it into powder to obtain the required phosphor material. Figure 4 The sample Sr obtained in embodiment 2 is sho...

Embodiment 3

[0047] (1) According to the chemical formula Sr 19 Mg 2 (PO 4 ) 14 :0.02Eu 2+ (Sr 18.62 Eu 0.38 Mg 2 (PO 4 ) 14 ) composition Weigh 0.6290gSrO, 0.0263g MgO, 0.5250g NH 4 h 2 PO 4 and 0.0552g Eu(NO 3 ) 3 ·6H 2 O, grind for 60min to make the raw materials mix evenly;

[0048] (2) Put the mixed powder into a corundum crucible, put it into a tube-type atmosphere furnace, and feed the mixed reducing gas, that is, flowing N 2 / H 2 (The volume ratio is 9 / 1) in a reducing atmosphere, raise the temperature at a rate of 5 °C / min to 900 °C for 4 hours, then increase the rate of temperature at 5 °C / min to 1200 °C, keep it at 6 hours, and then heat at 5 °C The rate per minute is lowered to 500°C and then naturally cooled to room temperature, and the obtained powder is taken out and ground into powder to obtain the required phosphor material. Figure 7 The sample Sr obtained in embodiment 3 is shown 18.62 Eu 0.38 Mg 2 (PO 4 ) 14 Its XRD pattern shows that its basic str...

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Abstract

The invention discloses a red strontium magnesium phosphate fluorescent material as well as a preparation method and application thereof. The red strontium magnesium phosphate fluorescent material isSr19(1-X)Eu19xMg2(PO4)14, and raw materials are weighed according to the molar ratio of each element in Sr:Eu:Mg=19(1-X):19x:2 and Mg:P=1:7, mixed under a reducing atmosphere, heated to 900 DEG C andmaintained the temperature for 4 hours, then heated to 1200 DEG C and maintained the temperature for 6 hours, and finally cooled to room temperature along with a furnace. The invention has the advantages that Eu2+ can obtain red light with emission wavelength of 625 nm at excitation wavelength of 400 nm after Eu2+ is dopped with Sr19Mg2 (PO4) 14 icons, which provides the red spectrum required by high color rendering in semiconductor lighting, and has high luminescence efficiency, good thermal stability and excellent chemical stability. The preparation method provided by the invention is simple, mild in synthetic conditions and suitable for mass production, and has great industrial application value.

Description

technical field [0001] The invention relates to a red strontium magnesium phosphate fluorescent material and its preparation method and application, in particular to a red phosphate fluorescent material used for photoluminescence in semiconductor lighting and its preparation method and application. Background technique [0002] WLEDs lamps have unique advantages in terms of energy saving, environmental protection, and long life. They are the development needs of the world to jointly advocate and participate in energy saving and environmental protection. In addition, LED lamps are truly environmentally friendly products because they are free of lead, mercury and other pollutants. [0003] The white light source of WLEDs can be obtained by combining (near) ultraviolet chips with red, green, and blue fluorescent materials, and has a high color rendering index and low color temperature. In order to improve the color rendering and stability of the final WLEDs, (near) ultraviolet l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/71H01L33/50
CPCC09K11/7738H01L33/502Y02B20/00
Inventor 朱革辛双宇周航健李卓为王闯周发光高淼
Owner DALIAN NATIONALITIES UNIVERSITY
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