METHOD OF PRODUCING BETA-SIALON FLUORESCENT MATERIAL

    公开(公告)号:US20210095202A1

    公开(公告)日:2021-04-01

    申请号:US17033576

    申请日:2020-09-25

    Abstract: Provided a method of producing a β-sialon fluorescent material having excellent emission intensity. The method includes providing a first composition containing aluminum, an oxygen atom, and a europium-containing silicon nitride, heat treating the first composition, contacting the heat-treated composition and a basic substance to obtain a second composition, and contacting the second composition resulting from contacting the heat-treated composition with the basic substance and an acidic liquid medium containing an acidic substance.

    WAVELENGTH CONVERTING MEMBER AND LIGHT EMITTING DEVICE

    公开(公告)号:US20200185575A1

    公开(公告)日:2020-06-11

    申请号:US16793018

    申请日:2020-02-18

    Abstract: A wavelength converting member comprising a first wavelength converting layer containing: a first fluorescent material having a light emission peak wavelength in a range of 620 nm or more and 660 nm or less; a second fluorescent material having a light emission peak wavelength in a range of 510 nm or more and 560 nm or less; and a resin, wherein the average particle diameter, as measured according to a Fisher Sub-Sieve Sizer method, of the first fluorescent material is in a range of 2 μm or more and 30 μm or less, wherein the second fluorescent material comprises a β-SiAlON fluorescent material, the circularity of the β-SiAlON fluorescent material is 0.7 or more, and the volume average particle diameter, as measured according to a laser diffraction scattering particle size distribution measuring method, of the β-SiAlON fluorescent material is in a range of 2 μm or more and 30 μm or less, and wherein the thickness of the first wavelength converting layer is in a range of 50 μm or more and 200 μm or less.

    METHOD FOR PRODUCING BETA-SIALON FLUORESCENT MATERIAL
    3.
    发明申请
    METHOD FOR PRODUCING BETA-SIALON FLUORESCENT MATERIAL 审中-公开
    生产BET-SIALON荧光材料的方法

    公开(公告)号:US20160355731A1

    公开(公告)日:2016-12-08

    申请号:US15172862

    申请日:2016-06-03

    CPC classification number: C09K11/7734

    Abstract: A method for producing a β-sialon fluorescent material is provided. The method includes heat-treating a mixture containing an aluminium compound, a first europium compound, and silicon nitride to obtain a first heat-treated product; and heat-treating the first heat-treated product with a second europium compound in a rare gas atmosphere to obtain a second heat-treated product.

    Abstract translation: 提供了β-赛隆荧光材料的制造方法。 该方法包括对含有铝化合物,第一铕化合物和氮化硅的混合物进行热处理以获得第一热处理产物; 在稀有气体气氛中用第二铕化合物对第一热处理物进行热处理,得到第二热处理物。

    METHOD FOR PRODUCING BETA-SIALON FLUORESCENT MATERIAL
    4.
    发明申请
    METHOD FOR PRODUCING BETA-SIALON FLUORESCENT MATERIAL 审中-公开
    生产BET-SIALON荧光材料的方法

    公开(公告)号:US20160347999A1

    公开(公告)日:2016-12-01

    申请号:US15165580

    申请日:2016-05-26

    CPC classification number: C09K11/7734

    Abstract: A method for producing a β-sialon fluorescent material superior in light emitting luminance is provided. The method includes heat-treating a first mixture containing an aluminum compound, a europium compound, and a first silicon oxynitride compound to obtain a first heat-treated product, and heat-treating a second mixture containing the first heat-treated product, an aluminum compound, a europium compound, and a second silicon oxynitride compound, which has a larger oxygen content than the first silicon oxynitride compound, to obtain a second heat-treated product.

    Abstract translation: 提供了一种制造发光亮度优异的β-赛隆荧光体的方法。 该方法包括热处理包含铝化合物,铕化合物和第一氮氧化硅化合物的第一混合物以获得第一热处理产物,并且热处理含有第一热处理产物的第二混合物,铝 化合物,铕化合物和第二氮氧化硅化合物,其具有比第一氮氧化硅化合物更大的氧含量,以获得第二热处理产物。

    METHOD OF PRODUCING BETA-SIALON FLUORESCENT MATERIAL

    公开(公告)号:US20230045233A1

    公开(公告)日:2023-02-09

    申请号:US17937766

    申请日:2022-10-03

    Abstract: Provided a method of producing a β-sialon fluorescent material having excellent emission intensity. The method includes providing a first composition containing aluminum, an oxygen atom, and a europium-containing silicon nitride, heat treating the first composition, contacting the heat-treated composition and a basic substance to obtain a second composition, and contacting the second composition resulting from contacting the heat-treated composition with the basic substance and an acidic liquid medium containing an acidic substance.

    WAVELENGTH CONVERTING MEMBER AND LIGHT EMITTING DEVICE

    公开(公告)号:US20190305193A1

    公开(公告)日:2019-10-03

    申请号:US16369046

    申请日:2019-03-29

    Abstract: A wavelength converting member comprising a first wavelength converting layer containing: a first fluorescent material having a light emission peak wavelength in a range of 620 nm or more and 660 nm or less; a second fluorescent material having a light emission peak wavelength in a range of 510 nm or more and 560 nm or less; and a resin, wherein the average particle diameter, as measured according to a Fisher Sub-Sieve Sizer method, of the first fluorescent material is in a range of 2 μm or more and 30 μm or less, wherein the second fluorescent material comprises a β-SiAlON fluorescent material, the circularity of the β-SiAlON fluorescent material is 0.7 or more, and the volume average particle diameter, as measured according to a laser diffraction scattering particle size distribution measuring method, of the β-SiAlON fluorescent material is in a range of 2 μm or more and 30 μm or less, and wherein the thickness of the first wavelength converting layer is in a range of 50 μm or more and 200 μm or less.

    METHOD FOR PRODUCING BETA-SIALON FLUORESCENT MATERIAL

    公开(公告)号:US20190330528A1

    公开(公告)日:2019-10-31

    申请号:US16504937

    申请日:2019-07-08

    Abstract: A method for producing β-sialon fluorescent material having excellent emission intensity is provided. The method for producing β-sialon fluorescent material includes providing a composition comprising silicon nitride that contains aluminium, an oxygen atom, and europium, heat treating the composition, contacting the heat-treated composition with a basic substance, and washing the composition, which has been contacted with the basic substance, with an acidic liquid medium.

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