Method for producing a terbium activated cerium magnesium aluminate
phosphor
    3.
    发明授权
    Method for producing a terbium activated cerium magnesium aluminate phosphor 失效
    铽活化铈铝酸镁荧光体的制备方法

    公开(公告)号:US4840747A

    公开(公告)日:1989-06-20

    申请号:US275485

    申请日:1988-11-23

    IPC分类号: C09K11/77 C09K11/80

    CPC分类号: C09K11/7774

    摘要: A method is disclosed for producing a terbium activated cerium magnesium aluminate phosphor which comprises forming a uniform powder blend consisting essentially of in percent by weight from about 73 to about 74 aluminum oxide wherein the aluminum oxide can be alpha aluminum oxide or gamma aluminum oxide or combinations thereof, from about 12 to about 14 cerium oxide, from about 2 to about 3 magnesium, from about 0.3 to about 0.7 fluoride, and from about 6 to about 9 terbium, firing the blend in a non-oxidizing atmosphere at a temperature of from about 1500.degree. C. to about 1800.degree. C. for a sufficient time to produce the phosphor wherein the particle size is no greater than about 5 micrometers in diameter. The phosphor is then cooled and deagglomerated.

    摘要翻译: 公开了一种用于制备铽激活的铈铝酸镁荧光体的方法,其包括形成基本上由约73至约74个氧化铝重量百分比组成的均匀粉末混合物,其中所述氧化铝可以是α氧化铝或γ-氧化铝或组合 约12至约14个氧化铈,约2至约3个镁,约0.3至约0.7个氟化物和约6至约9个铽,在非氧化性气氛中,在 约1500℃至约1800℃,足够的时间来生产其中粒径不大于约5微米直径的磷光体。 然后将荧光体冷却并解聚。

    Process for producing cerium activated yttrium gallium aluminate CRT
phosphor
    6.
    发明授权
    Process for producing cerium activated yttrium gallium aluminate CRT phosphor 失效
    铈活化钇铝酸镓CRT荧光体的制备方法

    公开(公告)号:US5076964A

    公开(公告)日:1991-12-31

    申请号:US607978

    申请日:1990-11-01

    IPC分类号: C09K11/77 C09K11/80

    CPC分类号: C09K11/7774

    摘要: A process for producing cerium activated yttrium gallium aluminate phosphor comprises dry blending yttrium oxide, gallium oxide, cerium oxide, and unmilled aluminum hydroxide wherein the aluminum hydroxide is a small particle size aluminum hydroxide wherein the 50% size as measured by Coulter Counter 2 minute stir technique using about a 100 micrometer aperture is about 10.8.+-.5 micrometers in diameter and by Coulter Counter 5 minute sonic technique using about a 100 micrometer aperture is about 9.3.+-.3 micrometers in diameter to form a uniform mixture thereof, and firing the mixture in air at a temperature of about 1550.degree. C. to about 1625.degree. C. for about 4 hours to 8 hours to produce a once-fired phosphor wherein the brightness is at least about 24% higher than phosphors produced using milled aluminum hydroxide that is large in particle size than the small size aluminum hydroxide. By refiring the phosphor, the brightness is further increased by at least about 14% over the once-fired phosphor. When the firing temperature is about 1625.degree. C. to 1700.degree. C. the brightness of the once-fired phosphor is increased by at least about 34% over phosphors produced using larger particle size aluminum hydroxide. In the latter case, the refired phosphor is at least about 10% brighter than the once-fired phosphor.

    摘要翻译: 一种制备铈活化钇铝酸镓荧光体的方法包括将氧化钇,氧化镓,氧化铈和未熔化的氢氧化铝干混,其中氢氧化铝是小粒度氢氧化铝,其中通过Coulter Counter 2分钟搅拌测量的50% 使用约100微米孔径的技术的直径为约10.8 +/- 5微米,而通过库尔特计数器,5分钟的声波技术使用约100微米的孔直径为约9.3 +/- 3微米,以形成其均匀的混合物,并且烧制 空气中的混合物在约1550℃至约1625℃的温度下进行约4小时至8小时以产生一次烧制的荧光体,其中亮度比使用研磨的氢氧化铝产生的荧光体高至少约24% 粒度比小型氢氧化铝大。 通过再填充荧光体,亮度比一次烧制的荧光体进一步增加至少约14%。 当烧制温度为约1625℃至1700℃时,与使用较大粒径的氢氧化铝生产的荧光体相比,一次性荧光体的亮度增加至少约34%。 在后一种情况下,反射的磷光体比一次性荧光体亮度至少大约10%。

    Process for producing a blue emitting lamp phosphor
    7.
    发明授权
    Process for producing a blue emitting lamp phosphor 失效
    蓝色荧光体的制造方法

    公开(公告)号:US5358734A

    公开(公告)日:1994-10-25

    申请号:US158083

    申请日:1993-11-24

    摘要: A fluorescent lamp comprising a sealed envelope, a pair of opposing electrodes, a fill of inert gas and mercury and a phosphor coating on the internal walls of the envelope wherein the coating contains as at least one element thereof particles of europium activated barium magnesium aluminate having an average particle size of about 4 micrometers, less than about 5% of the particles having a size greater than 15 microns and less than about 5% of the particles having a size less than about 1 micron, said particles having on the external surfaces thereof a coating of sub-micron aluminum oxide having a surface area of from about 80 to about 120 square meters per gram, said coating being sufficient to impart stir in quality to said phosphor.

    摘要翻译: 一种荧光灯,包括密封的外壳,一对相对的电极,惰性气体和汞的填充物以及在封套的内壁上的荧光粉涂层,其中该涂层至少含有一种元素,其具有铕活化的铝酸镁铝颗粒,其具有 所述颗粒在其外表面上具有约4微米的平均粒度,小于约5%的尺寸大于15微米且小于约5%的颗粒,其尺寸小于约1微米 表面积为约80至约120平方米/克的亚微米级氧化铝涂层,所述涂层足以使质量搅拌至所述荧光粉。