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对节能、小型、紧凑等新型荧光灯中使用的荧光粉要求有更高的稳定性。与普通荧光灯相比这类灯中的激发辐射密度较高,此外能引起荧光粉劣化的波长为185nm的辐射相对量也有所增加。研究高激发密度灯用荧光粉光通的稳定性表明,稀土荧光粉比传统的宽带粉有很大的优越性。目前稀土荧光粉中使用最广的是六角铝酸盐;用铕激活的钡、镁铝酸盐和镁、铈、铽、铝酸盐与铕激活的氧化钆相配合,40瓦荧光灯的光通可超过3000流明,显色指数为82—85。
For energy-saving, compact, compact fluorescent lamps used in new fluorescent lamps require a higher stability. In comparison with ordinary fluorescent lamps, the excitation radiation density is higher in this type of lamp. In addition, the relative amount of radiation having a wavelength of 185 nm that causes deterioration of the fluorescent powder also increases. The study on the stability of phosphor with high-density phosphor shows that phosphor has a great advantage over the traditional broadband phosphor. At present, the most widely used rare earth phosphor is hexagonal aluminate; europium-activated barium, magnesium aluminate and magnesium, cerium, terbium, aluminate and europium-activated gadolinium oxide, 40 watt fluorescent light flux Can exceed 3000 lumens, color rendering index of 82-85.