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    • 9. 发明公开
    • Phosphor particle, phosphor blend, and fluorescent lamp
    • 磷光体颗粒,磷光体混合物和荧光灯
    • EP0257554A3
    • 1989-03-08
    • EP87112055.6
    • 1987-08-19
    • GTE PRODUCTS CORPORATION
    • Chenot, Charles F.Minnier, Henry B.Taubner, Fred R.Sigai, A. Gary
    • C09K11/67C09K11/59H01J61/44H01J61/48C09K11/02
    • H01J61/44C09K11/025C09K11/595C09K11/676H01J61/48
    • A phosphor particle having a continuous aluminum oxide coating surrounding its outer surface is provided. The phosphor substrate of the coated particle of the present invention is a manganese-activated zinc orthosilicate phosophor having the empirical formula:
          Zn (2.00-x-y) Mn x SiO (4.00-y) (WO₃) z
      wherein:
      0.04 ≦ x ≦ 0.15;
      0 ≦ y ≦ 0.05; and
      0 ≦ z ≦ 0.002.
      Also provided is a fluorescent lamp including a glass envelope wherein the inner wall of the glass envelope is coated with a coating comprising one or more layers of phosphor, at least one of the phosphor layers including a phosphor component comprising particles of manganese-activated zinc orthosilicate phosphor having the empirical formula:
          Zn (2.00-x-y) Mn x SiO (4.00-y) (WO₃) z
      wherein:
      0.04 ≦ x ≦ 0.15;
      0 ≦ y ≦ 0.05; and
      0 ≦ z ≦ 0.002, the particles of the manganese-activated zinc orthosilicate phosphor being individually coated with a continuous coating of aluminum oxide. A white-emitting phosphor blend is further provided. The white-emitting phosphor blend comprises a green-emitting phosphor component. The green-emitting phosphor component comprising particles of manganese-activated zinc orthosilicate phosphor having the empirical formula:
          Zn (2.00-x-y) Mn x SiO (4.00-y) (WO₃) z
      wherein:
      0.04 ≦ x ≦ 0.15;
      0 ≦ y ≦ 0.05; and
      0 ≦ z ≦ 0.002,
      the particles of the manganese-activated zinc orthosilicate phosphor being individually coated with a continuous coating of aluminum oxide.