公开(公告)号：US5076964A

公开(公告)日：1991-12-31

申请号：US607978

申请日：1990-11-01

申请人： Anthony F. Kasenga ,  Olney B. Bullock, Jr. ,  Joseph J. Lenox

发明人： Anthony F. Kasenga ,  Olney B. Bullock, Jr. ,  Joseph J. Lenox

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％。