| 摘要 |
FIELD: lighting.SUBSTANCE: invention is designed for lighting and may be used in white light-emitting diodes, fluorescent lamps, lamps, automotive lamps and lighting design. Method for synthesis of white light phosphors based on rare-earth garnets (YCe)AlO, (GdCe)AlO, (LuCe)AlOincludes mixing source oxides of metals, taken in proportions stoichiometric compound, and heating resulting mixture. To carry out synthesis at a variable pressure working volume with an initial mixture is first evacuated to a pressure of 10Pa, and then filled with a mixture gas in a proportion of 95 % Nto 5 % Hpressure to 101,325 Pa, temperature is raised to a temperature in beginning of formation of the synthesised compound in range of 1,250-1,350 °C, raising pressure of reduced gas to 1.5 x 10Pa and holding for at least 3 hours. Thereafter, gas is evacuated to a pressure of 10Pa and held for at least 5 hours. Cooled at a rate of 80-100 °C/h to room temperature and obtained sample is removed.EFFECT: phosphors have a single phase composition, proper isometric particles do not form agglomerates, with a particle size distribution D50 is 15-20 mcm, luminous efficiency is 120-101 lm/W.4 cl, 10 dwg, 3 ex |
