Phosphor based on a lanthanum cerium terbium phosphate with stabilized brightness, preparation process and use in a luminescent device
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United States of America Patent
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Oct 24, 2017
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Aug 21, 2012
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Aug 31, 2011
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Abstract
The phosphor of the invention is based on a lanthunum cerium terbium phosphate, and it is characterized in that the phosphate consists of particles having a mean size of at most 4 μm, in that it has a lithium content of at most 30 ppm, a boton content of at most 30 ppm and in that it has a variation of brightness between the brightness measured on the phosphor at 25° C. and that measured on the same phosphor at 200° C. of at most 4%.
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