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Modified sialon fluorescence powder particle and preparation method thereof as well as sialon fluorophor and luminescent devices

A phosphor particle and modification technology, applied in semiconductor devices, luminescent materials, chemical instruments and methods, etc., can solve the problems of inability to prove anti-aging performance, affect the stability of phosphor powder, and be unsuitable for industrialization, and achieve a crystal structure. Solid and stable, good anti-aging and light decay performance, the effect of improving stability

Active Publication Date: 2017-04-19
JIANGSU BREE OPTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still obvious deficiencies in this solution: first, there are no relevant performance parameters related to the anti-aging performance of the phosphor, so it is impossible to prove that it improves the anti-aging performance while increasing the luminous intensity; second, the preparation method is relatively complicated and not suitable for industrialization
However, there are still obvious deficiencies in this solution: first, because the composition elements of each layer of phosphor are different, the compatibility between layers is not good, which affects the stability of phosphor; second, the preparation method is relatively complicated, which is not suitable for industrial change

Method used

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  • Modified sialon fluorescence powder particle and preparation method thereof as well as sialon fluorophor and luminescent devices
  • Modified sialon fluorescence powder particle and preparation method thereof as well as sialon fluorophor and luminescent devices
  • Modified sialon fluorescence powder particle and preparation method thereof as well as sialon fluorophor and luminescent devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Weigh Si 3 N 4 19.366g, AlN0.522g, Eu 2 o 3 0.112g, mix the above raw materials in a nitrogen atmosphere for 1 hour to form a nuclear mixture, put it into a BN crucible, then quickly move it into a carbon tube furnace, then gradually raise the temperature to 1850°C under the protection of a nitrogen atmosphere, and keep it warm for 8 hours , the atmosphere pressure is 5Mpa, and then the temperature is lowered to 350°C, and the air is introduced at a speed of 5L / min for roasting, and the roasting time is 3h to form a semi-finished product with a nucleus; weigh Si 3 N 4 19.199g, AlN0.801g, the above raw materials are fully mixed in a nitrogen atmosphere for 1h to form a shell mixture, put it into a BN crucible, then quickly move it into a carbon tube furnace, and then gradually raise the temperature to 1600 under the protection of a nitrogen atmosphere ℃, keep warm for 6 hours, and the atmosphere pressure is 2Mpa to form a semi-finished shell. The semi-finished shell ...

Embodiment 2

[0049] Weigh Si 3 N 4 19.32g, AlN0.565g, EuF 3 0.115g, mix the above raw materials in a nitrogen atmosphere for 1 hour to form a nuclear mixture, put it into a BN crucible, then quickly move it into a carbon tube furnace, then gradually raise the temperature to 1850°C under the protection of a nitrogen atmosphere, and keep it warm for 8 hours , the atmosphere pressure is 5Mpa, and then the temperature is lowered to 350°C, and the air is introduced at a speed of 5L / min for roasting, and the roasting time is 3h to form a semi-finished product with a nucleus; weigh Si 3 N 4 19.686g, AlN0.314g, the above raw materials were fully mixed in nitrogen atmosphere for 1h to form a shell mixture, put it into a BN crucible, then quickly moved it into a carbon tube furnace, and then gradually raised the temperature to 1600 under the protection of nitrogen atmosphere ℃, keep warm for 6 hours, and the atmosphere pressure is 2Mpa to form a semi-finished shell. The semi-finished shell is cru...

Embodiment 3

[0051] Weigh Si 3 N 4 19.491g, AlN0.358g, EuCl 30.151g, mix the above raw materials in a nitrogen atmosphere for 1 hour to form a nuclear mixture, put it into a BN crucible, then quickly move it into a carbon tube furnace, then gradually raise the temperature to 1850°C under the protection of a nitrogen atmosphere, and keep it warm for 8 hours , the atmosphere pressure is 5Mpa, and then the temperature is lowered to 350°C, and the air is introduced at a speed of 5L / min for roasting, and the roasting time is 3h to form a semi-finished product with a nucleus; weigh Si 3 N 4 19.16g, AlN0.84g, the above raw materials are fully mixed in nitrogen atmosphere for 1h to form a shell mixture, put it into a BN crucible, then quickly move it into a carbon tube furnace, and then gradually raise the temperature to 1600 under the protection of nitrogen atmosphere ℃, keep warm for 6 hours, and the atmosphere pressure is 2Mpa to form a semi-finished shell. The semi-finished shell is crushed...

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Abstract

The invention relates to a modified sialon fluorescence powder particle and a preparation method thereof as well as a sialon fluorophor and luminescent devices. The structure of the modified sialon fluorescence powder particle is a nucleus-shell structure; a nuclear structure of the modified sialon fluorescence powder particle is successively divided into a crystal nucleus layer, a transition layer and an extranuclear layer from the particle core to the external surface according to the progressive increase of the content of oxygen; a main body of the crystal nucleus layer is a nitrogen oxide material; a main body of the transition layer is a nitrogen oxide material; the main body of the extranuclear layer is an oxide material or an oxynitride material. The modified sialon fluorescence powder particle and the sialon fluorophor have the advantages of high chemical stability, high ageing light attenuation resistance and high luminescent efficiency, and are applicable to various luminescent devices. The preparation method is simple, convenient and reliable, is capable of improving chemical and physical stability of the modified sialon fluorescence powder particle and the sialon fluorophor, and is suitable for industrial mass production.

Description

technical field [0001] The invention belongs to the technical field of LED phosphors and light-emitting devices, and in particular relates to a modified sialon phosphor particle capable of being effectively excited by ultraviolet light, purple light or blue light, a preparation method thereof, a sialon phosphor and a light-emitting device. Background technique [0002] In recent years, LCD TV display technology has developed rapidly, and the backlight source technology, which is one of the core technologies of LCD display, has also been greatly developed. It has become a recognized development trend that LED replaces CCFL as the next generation LCD backlight technology. Liquid crystal display backlight will become the largest application market of LED, accounting for more than 40% of the total LED market. [0003] The use of LED as the LCD backlight greatly improves the image quality, especially in terms of color saturation. The color gamut coverage rate of LED backlight r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/64H01L33/50
CPCH01L33/504C09K11/02C09K11/77348
Inventor 何锦华滕晓明梁超符义兵
Owner JIANGSU BREE OPTRONICS CO LTD
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