Phosphor particle, phosphor blend, and fluorescent lamp

Details Phosphor particle, phosphor blend, and fluorescent lamp Phosphor particle, phosphor blend, and fluorescent lamp

C - Chemistry, Metallurgy

09

K

31/121, 117/22,

C09K 11/02 (2006.01) C09K 11/59 (2006.01) C09K 11/67 (2006.01) H01J 61/44 (2006.01) H01J 61/48 (2006.01)

Patent

CA 1330911

PHOSPHOR PARTICLE, PHOSPHOR BLEND, AND FLUORESCENT LAMP ABSTRACT 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)MnxSiO(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)MnxSiO(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)MnxSiO(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. xide.

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