Historically, average lamp-phosphor particle sizes have been in the 5-20 mu m range. Current trends in fluorescent lighting appear in the direction of smaller materials in the 1-10 mu range, and for plasma display panel (PDP) applications even finer particles are being requested in the 1-3 mu m range. Intraditional single-layer and especially in modern double-layer, more complex fluorescent lamps the phosphor coating thicknesses are strategized to effect an optimum or acceptable luminescence performance at the least coating weight. In order to achieve this performance, phosphor particle size and particle shape have become an important part of this strategy, and some emphasis has been placed on new and nvel synthesis techniques to achieve improved reactivity, particle size control, and particle morphology control. A selection of four synthesis methods is discussed intended to highlight the effectiveness of some novel fluxed and reaction-facilitated synthesis methods.
展开▼
