| 摘要 |
A novel phosphate treated silicate phosphor has been invented that exhibits improved lumen maintenance with respect to the untreated phosphor when used in a fluorescent lamp. In one aspect, a protective phosphate-containing surface layer is formed by treating the phosphor in an aqueous phosphate solution, filtering, and annealing. In particular, a BaSi2O5:Pb phosphor that has been treated in this way exhibits improved maintenance in a fluorescent lamp and a characteristic X-ray diffraction pattern evidencing the presence of the protective phosphate-containing surface layer.
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