Apatite structure lanthanum silicate luminescent powder material as well as preparation method and application thereof

A technology of luminescent powder and lanthanum silicate, which is applied in the direction of luminescent materials, chemical instruments and methods, can solve the problems of low sintering temperature, long time, complicated process, etc., and achieve simple preparation process, low cost, and overcome phase formation The effect of overheating

Active Publication Date: 2020-12-04
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage is that the prepared powder particles are small, can reach the nanometer to micron level, the shape is easy to grasp, and the sintering temperature is low; the disadvantage is that the process is relatively complicated, and the time required for the sol-gel process is long. Production is relatively small

Method used

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  • Apatite structure lanthanum silicate luminescent powder material as well as preparation method and application thereof
  • Apatite structure lanthanum silicate luminescent powder material as well as preparation method and application thereof
  • Apatite structure lanthanum silicate luminescent powder material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A preparation method of apatite type lanthanum silicate luminescent powder material, comprising the following steps:

[0031] (1) Weigh lanthanum nitrate, europium nitrate, calcium carbonate and magnesium nitrate according to the chemical molar ratio of 8:1:2:0, add the above raw materials into deionized water, fully stir and dissolve to become a transparent solution;

[0032] (2) Ethyl orthosilicate is added to the transparent solution obtained in step (1), the molar ratio of ethyl orthosilicate to lanthanum nitrate is 6:8 to obtain a precursor solution;

[0033] (3) Take deionized water, ammonia water and absolute ethanol at a volume ratio of 1:1:1, mix them, adjust the pH value to 9, and obtain a precipitant solution;

[0034] (4) Slowly drop the precursor solution obtained in step (2) into the precipitant solution obtained in step (3), stir with a magnetic stirrer, and adjust the pH value to 9 to obtain a white precipitate;

[0035] (5) Wash the white precipitate o...

Embodiment 2

[0038] A preparation method of apatite type lanthanum silicate luminescent powder material, comprising the following steps:

[0039] (1) Weigh lanthanum nitrate, europium nitrate, calcium carbonate and magnesium nitrate according to the chemical molar ratio of 7:1:2:1, add the above raw materials into deionized water, fully stir and dissolve to become a transparent solution;

[0040] (2) Ethyl orthosilicate was added to the transparent solution obtained in step (1), the molar ratio of ethyl orthosilicate to lanthanum nitrate was 6:7 to obtain a precursor solution;

[0041] (3) Take deionized water, ammonia water and absolute ethanol according to the volume ratio of 1:1:2, mix them, adjust the pH value to 8, and obtain the precipitant solution;

[0042](4) Slowly drop the precursor solution obtained in step (2) into the precipitant solution obtained in step (3), stir with a magnetic stirrer, and adjust the pH value to 8 to obtain a white precipitate;

[0043] (5) Wash the whit...

Embodiment 3

[0046] A preparation method of apatite type lanthanum silicate luminescent powder material, comprising the following steps:

[0047] (1) Weigh lanthanum nitrate, europium nitrate, calcium carbonate and magnesium nitrate according to the chemical molar ratio of 6:1:2:2, add the above raw materials into deionized water, fully stir and dissolve to become a transparent solution;

[0048] (2) Ethyl orthosilicate is added to the transparent solution obtained in step (1), the molar ratio of ethyl orthosilicate to lanthanum nitrate is 5:6 to obtain a precursor solution;

[0049] (3) Take deionized water, ammonia water and absolute ethanol according to the volume ratio of 1:2:2, mix them, adjust the pH value to 10, and obtain a precipitant solution;

[0050] (4) Slowly drop the precursor solution obtained in step (2) into the precipitant solution obtained in step (3), stir with a magnetic stirrer, and adjust the pH value to 10 to obtain a white precipitate;

[0051] (5) Wash the white...

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Abstract

The invention discloses an apatite structure lanthanum silicate luminescent powder material as well as a preparation method and an application thereof, and particularly relates to the method for preparing the apatite structure lanthanum silicate luminescent powder material by adopting a coprecipitation method, which can be used for successfully preparing an impurity-phase-free high-performance luminescent material, wherein lanthanum silicate is taken as the matrix, the silicate luminescent powder has excellent thermal stability and chemical stability and is low in cost; europium ion Eu<3+> isused as an activating agent, and the luminescent powder material capable of emitting red light can be prepared. The preparation method disclosed by the invention overcomes the defects that a high-temperature solid-phase method is too high in phase forming temperature and a sol-gel method is complex in process, can form a target product after heat preservation at a relatively low temperature (800-1000 DEG C), and is suitable for industrial application.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a lanthanum silicate luminescent powder material with an apatite structure. The present invention further relates to the preparation method and application of the material. Background technique [0002] In recent years, thanks to the excellent performance of LEDs, fluorescent materials for LED lamps have been used more and more frequently in various countries, and there are more and more literature reports on this field, but there is still room for development in the field of fluorescent materials. There is great. Because the various performances of the existing LED fluorescent materials have not yet met the needs of people's lives. The fluorescent materials currently used generally have the following problems, such as poor color rendering, poor luminous performance, unstable luminescence, and high light attenuation rate. [0003] Therefore, it is very important ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79
CPCC09K11/7792Y02B20/00
Inventor 施庆乐
Owner YANCHENG INST OF TECH
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